Abstract

A new method is presented for retrieval of the aerosol and cloud optical depth using a CCD camera equipped with a fish-eye lens (all-sky imager system). In a first step, the proposed method retrieves the spectral radiance from sky images acquired by the all-sky imager system using a linear pseudoinverse algorithm. Then, the aerosol or cloud optical depth at 500nm is obtained as that which minimizes the residuals between the zenith spectral radiance retrieved from the sky images and that estimated by the radiative transfer code. The method is tested under extreme situations including the presence of nonspherical aerosol particles. The comparison of optical depths derived from the all-sky imager with those retrieved with a sunphotometer operated side by side shows differences similar to the nominal error claimed in the aerosol optical depth retrievals from sunphotometer networks.

© 2008 Optical Society of America

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    [CrossRef]
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    [CrossRef]

2008 (6)

D. Pérez-Ramírez, J. Aceituno, B. Ruiz, F. J. Olmo, and L. Alados-Arboledas, “Development and calibration of a star photometer to measure the aerosol optical depth: smoke observations at a high mountain site,” Atmos. Environ. 42, 2733-2738 (2008).
[CrossRef]

D. Pérez-Ramírez, B. Ruiz, J. Aceituno, F. J. Olmo, and L. Alados-Arboledas, “Application of Sun/star photometry to derive the aerosol optical depth,” Int. J. Remote Sens. 29, 5113-5132 (2008).
[CrossRef]

A. Cazorla, F. J. Olmo, and L. Alados-Arboledas, “Using a sky Imager for aerosol characterization,” Atmos. Environ. 42, 2739-2745 (2008).
[CrossRef]

F. J. Olmo, A. Quirantes, V. Lara, H. Lyamani, and L. Alados-Arboledas, “Aerosol optical properties assessed by an inversion method using the solar principal plane for nonspherical particles,” J. Quant. Spectrosc. Radiat. Transfer 109, 1504-1516 (2008).
[CrossRef]

A. Cazorla, F. J. Olmo, and L. Alados-Arboledas, “Development of a sky imager for cloud cover assessment,” J. Opt. Soc. Am. A 25, 29-39 (2008).
[CrossRef]

M. A. López-Álvarez, J. Hernández-Andrés, J. Romero, F. J. Olmo, A. Cazorla, and L. Alados-Arboledas, “Using a trichromatic CCD camera for spectral skylight estimation,” Appl. Opt. 47, H31-H38 (2008).
[CrossRef] [PubMed]

2007 (1)

2006 (5)

F. J. Olmo, A. Quirantes, A. Alcántara, H. Lyamani, and L. Alados-Arboledas, “Preliminary results of a nonspherical aerosol method for the retrieval of the atmospheric aerosol optical properties,” J. Quant. Spectrosc. Radiat. Transf. 100, 305-314 (2006).
[CrossRef]

N. Kikuchi, T. Nakajima, H. Kumagai, H. Kuroiwa, A. Kamei, R. Nakamura, and T. Y. Nakajima, “Cloud optical thicness and effective particle radius derived from transmitted solar radiation measurements: comparison with cloud radar observations,” J. Geophys. Res. 111, D07205, doi:10.1029/2005JD006363 (2006).
[CrossRef]

C. N. Long, J. M. Sabburg, J. Calbó, and D. Pagès, “Retrieving cloud characteristics from ground based daytime color all-sky images,” J. Atmos. Ocean. Technol. 23, 633-652 (2006).
[CrossRef]

V. Estellés, M. P. Utrillas, J. A. Martínez-Lozano, A. Alcántara, L. Alados-Arboledas, F. J. Olmo, J. Lorente, X. de Cabo, V. Cachorro, H. Horvath, A. Labajo, M. Sorribas, J. P. Díaz, A. M. Díaz, A. M. Silva, T. Elías, M. Pujadas, J. A. Rodrigues, J. Cañada, and Y. García, “Intercomparison of spectroradiometers and sunphotometers for the determination of the aerosol optical depth during the VELETA-2002 field campaign,” J. Geophys. Res. 111, D17207, doi: 10.1029/2005JD006047 (2006).
[CrossRef]

H. Lyamani, F. J. Olmo, A. Alcántara, and L. Alados-Arboledas, “Atmospheric aerosols during the 2003 heat wave in southeastern Spain I: spectral optical depth,” Atmos. Environ. 40, 6453-6464 (2006).
[CrossRef]

2005 (3)

2004 (1)

A. Alcántara-Ruiz, F. J. Olmo, and L. Alados-Arboledas, “Langley calibrations of sunphotometer at Sierra Nevada, Granada, Spain,” Opt. Pura Apl. 37, 3263-3269 (2004).

2003 (1)

L. Alados-Arboledas, H. Lyamani, and F. J. Olmo, “Aerosol size properties at Armilla, Granada (Spain),” Q. J. R. Meteorol. Soc. 129, 1395-1413 (2003).
[CrossRef]

2002 (3)

O. Dubovik, B. N. Holben, T. Lapyonok, A. Sinyuk, M. I. Mishchenko, P. Yang, and I. Slutsker, “Non-spherical aerosol retrieval method employing light scattering by spheroids,” Geophys. Res. Lett. 29, 1415 (2002).
[CrossRef]

Y. J. Kaufman, D. Tanré, B. N. Holben, S. Mattoo, L. A. Remer, and T. F. Eck, “Aerosol radiative impact on spectral solar flux at the surface, derived from principal plane sky measurements,” J. Atmos. Sci. 59, 635-646 (2002).
[CrossRef]

Y. J. Kaufman, D. Tanré, and O. Boucher, “A satellite view of aerosols in the climate system,” Nature 419, 215-223 (2002).
[CrossRef] [PubMed]

2000 (1)

A. Smirnov, B. N. Holben, T. F. Eck, O. Dubovik, and I. Slutsker, “Cloud-screening and quality control algorithms for the AERONET database,” Remote Sens. Environ. 73, 337-349(2000).
[CrossRef]

1998 (3)

B. N. Holben, T. F. Eck, I. Slutsker, D. Tanre, J. P. Buis, A. Setzer, E. Vermote, J. A. Reagan, Y. J. Kaufman, T. Nakajima, F. Lavenu, I. Jankowiak, and A. Smirnov, “AERONET-a federated instrument network and data archive for aerosol characterization,” Remote Sens. Environ. 66, 1-16 (1998).
[CrossRef]

C. Sánchez, F. J. Olmo, and L. Alados-Arboledas, “Determination of aerosol optical thickness from measurements of spectral sky radiance,” J. Aerosol Sci. 29, 1199-1211 (1998).
[CrossRef]

P. Ricchiazzi, S. Yang, C. Gautier, and D. Sowle, “SBDART: A research and teaching software tool for plane-parallel radiative transfer in the Earth's atmosphere,” Bull. Amer. Meteorol. Soc. 79, 2101-2113 (1998).
[CrossRef]

1988 (1)

Aceituno, J.

D. Pérez-Ramírez, J. Aceituno, B. Ruiz, F. J. Olmo, and L. Alados-Arboledas, “Development and calibration of a star photometer to measure the aerosol optical depth: smoke observations at a high mountain site,” Atmos. Environ. 42, 2733-2738 (2008).
[CrossRef]

D. Pérez-Ramírez, B. Ruiz, J. Aceituno, F. J. Olmo, and L. Alados-Arboledas, “Application of Sun/star photometry to derive the aerosol optical depth,” Int. J. Remote Sens. 29, 5113-5132 (2008).
[CrossRef]

Alados-Arboledas, L.

D. Pérez-Ramírez, B. Ruiz, J. Aceituno, F. J. Olmo, and L. Alados-Arboledas, “Application of Sun/star photometry to derive the aerosol optical depth,” Int. J. Remote Sens. 29, 5113-5132 (2008).
[CrossRef]

M. A. López-Álvarez, J. Hernández-Andrés, J. Romero, F. J. Olmo, A. Cazorla, and L. Alados-Arboledas, “Using a trichromatic CCD camera for spectral skylight estimation,” Appl. Opt. 47, H31-H38 (2008).
[CrossRef] [PubMed]

A. Cazorla, F. J. Olmo, and L. Alados-Arboledas, “Using a sky Imager for aerosol characterization,” Atmos. Environ. 42, 2739-2745 (2008).
[CrossRef]

D. Pérez-Ramírez, J. Aceituno, B. Ruiz, F. J. Olmo, and L. Alados-Arboledas, “Development and calibration of a star photometer to measure the aerosol optical depth: smoke observations at a high mountain site,” Atmos. Environ. 42, 2733-2738 (2008).
[CrossRef]

F. J. Olmo, A. Quirantes, V. Lara, H. Lyamani, and L. Alados-Arboledas, “Aerosol optical properties assessed by an inversion method using the solar principal plane for nonspherical particles,” J. Quant. Spectrosc. Radiat. Transfer 109, 1504-1516 (2008).
[CrossRef]

A. Cazorla, F. J. Olmo, and L. Alados-Arboledas, “Development of a sky imager for cloud cover assessment,” J. Opt. Soc. Am. A 25, 29-39 (2008).
[CrossRef]

V. Estellés, M. P. Utrillas, J. A. Martínez-Lozano, A. Alcántara, L. Alados-Arboledas, F. J. Olmo, J. Lorente, X. de Cabo, V. Cachorro, H. Horvath, A. Labajo, M. Sorribas, J. P. Díaz, A. M. Díaz, A. M. Silva, T. Elías, M. Pujadas, J. A. Rodrigues, J. Cañada, and Y. García, “Intercomparison of spectroradiometers and sunphotometers for the determination of the aerosol optical depth during the VELETA-2002 field campaign,” J. Geophys. Res. 111, D17207, doi: 10.1029/2005JD006047 (2006).
[CrossRef]

F. J. Olmo, A. Quirantes, A. Alcántara, H. Lyamani, and L. Alados-Arboledas, “Preliminary results of a nonspherical aerosol method for the retrieval of the atmospheric aerosol optical properties,” J. Quant. Spectrosc. Radiat. Transf. 100, 305-314 (2006).
[CrossRef]

H. Lyamani, F. J. Olmo, A. Alcántara, and L. Alados-Arboledas, “Atmospheric aerosols during the 2003 heat wave in southeastern Spain I: spectral optical depth,” Atmos. Environ. 40, 6453-6464 (2006).
[CrossRef]

A. Alcántara-Ruiz, F. J. Olmo, and L. Alados-Arboledas, “Langley calibrations of sunphotometer at Sierra Nevada, Granada, Spain,” Opt. Pura Apl. 37, 3263-3269 (2004).

L. Alados-Arboledas, H. Lyamani, and F. J. Olmo, “Aerosol size properties at Armilla, Granada (Spain),” Q. J. R. Meteorol. Soc. 129, 1395-1413 (2003).
[CrossRef]

C. Sánchez, F. J. Olmo, and L. Alados-Arboledas, “Determination of aerosol optical thickness from measurements of spectral sky radiance,” J. Aerosol Sci. 29, 1199-1211 (1998).
[CrossRef]

Alcántara, A.

V. Estellés, M. P. Utrillas, J. A. Martínez-Lozano, A. Alcántara, L. Alados-Arboledas, F. J. Olmo, J. Lorente, X. de Cabo, V. Cachorro, H. Horvath, A. Labajo, M. Sorribas, J. P. Díaz, A. M. Díaz, A. M. Silva, T. Elías, M. Pujadas, J. A. Rodrigues, J. Cañada, and Y. García, “Intercomparison of spectroradiometers and sunphotometers for the determination of the aerosol optical depth during the VELETA-2002 field campaign,” J. Geophys. Res. 111, D17207, doi: 10.1029/2005JD006047 (2006).
[CrossRef]

H. Lyamani, F. J. Olmo, A. Alcántara, and L. Alados-Arboledas, “Atmospheric aerosols during the 2003 heat wave in southeastern Spain I: spectral optical depth,” Atmos. Environ. 40, 6453-6464 (2006).
[CrossRef]

F. J. Olmo, A. Quirantes, A. Alcántara, H. Lyamani, and L. Alados-Arboledas, “Preliminary results of a nonspherical aerosol method for the retrieval of the atmospheric aerosol optical properties,” J. Quant. Spectrosc. Radiat. Transf. 100, 305-314 (2006).
[CrossRef]

Alcántara-Ruiz, A.

A. Alcántara-Ruiz, F. J. Olmo, and L. Alados-Arboledas, “Langley calibrations of sunphotometer at Sierra Nevada, Granada, Spain,” Opt. Pura Apl. 37, 3263-3269 (2004).

Artaxo, P.

P. Forster, V. Ramaswamy, P. Artaxo, T. Berntsen, R. Betts, D. W. Fahey, J. Haywood, J. Lean, D. C. Lowe, G. Myhre, J. Nganga, R. Prinn, G. Raga, M. Schultz, and R. Van Dorland, “Changes in atmospheric constituents and in radiative forcing,” in Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, S. Solomon, D. Qin, M. Manning, Z. Chen, M. Marquis, K. B. Averyt, M. Tignor, and H. L. Miller, eds. (Cambridge U. Press, 2007).

Berntsen, T.

P. Forster, V. Ramaswamy, P. Artaxo, T. Berntsen, R. Betts, D. W. Fahey, J. Haywood, J. Lean, D. C. Lowe, G. Myhre, J. Nganga, R. Prinn, G. Raga, M. Schultz, and R. Van Dorland, “Changes in atmospheric constituents and in radiative forcing,” in Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, S. Solomon, D. Qin, M. Manning, Z. Chen, M. Marquis, K. B. Averyt, M. Tignor, and H. L. Miller, eds. (Cambridge U. Press, 2007).

Betts, R.

P. Forster, V. Ramaswamy, P. Artaxo, T. Berntsen, R. Betts, D. W. Fahey, J. Haywood, J. Lean, D. C. Lowe, G. Myhre, J. Nganga, R. Prinn, G. Raga, M. Schultz, and R. Van Dorland, “Changes in atmospheric constituents and in radiative forcing,” in Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, S. Solomon, D. Qin, M. Manning, Z. Chen, M. Marquis, K. B. Averyt, M. Tignor, and H. L. Miller, eds. (Cambridge U. Press, 2007).

Boucher, O.

Y. J. Kaufman, D. Tanré, and O. Boucher, “A satellite view of aerosols in the climate system,” Nature 419, 215-223 (2002).
[CrossRef] [PubMed]

Buis, J. P.

B. N. Holben, T. F. Eck, I. Slutsker, D. Tanre, J. P. Buis, A. Setzer, E. Vermote, J. A. Reagan, Y. J. Kaufman, T. Nakajima, F. Lavenu, I. Jankowiak, and A. Smirnov, “AERONET-a federated instrument network and data archive for aerosol characterization,” Remote Sens. Environ. 66, 1-16 (1998).
[CrossRef]

Cachorro, V.

V. Estellés, M. P. Utrillas, J. A. Martínez-Lozano, A. Alcántara, L. Alados-Arboledas, F. J. Olmo, J. Lorente, X. de Cabo, V. Cachorro, H. Horvath, A. Labajo, M. Sorribas, J. P. Díaz, A. M. Díaz, A. M. Silva, T. Elías, M. Pujadas, J. A. Rodrigues, J. Cañada, and Y. García, “Intercomparison of spectroradiometers and sunphotometers for the determination of the aerosol optical depth during the VELETA-2002 field campaign,” J. Geophys. Res. 111, D17207, doi: 10.1029/2005JD006047 (2006).
[CrossRef]

Calbó, J.

C. N. Long, J. M. Sabburg, J. Calbó, and D. Pagès, “Retrieving cloud characteristics from ground based daytime color all-sky images,” J. Atmos. Ocean. Technol. 23, 633-652 (2006).
[CrossRef]

Cañada, J.

V. Estellés, M. P. Utrillas, J. A. Martínez-Lozano, A. Alcántara, L. Alados-Arboledas, F. J. Olmo, J. Lorente, X. de Cabo, V. Cachorro, H. Horvath, A. Labajo, M. Sorribas, J. P. Díaz, A. M. Díaz, A. M. Silva, T. Elías, M. Pujadas, J. A. Rodrigues, J. Cañada, and Y. García, “Intercomparison of spectroradiometers and sunphotometers for the determination of the aerosol optical depth during the VELETA-2002 field campaign,” J. Geophys. Res. 111, D17207, doi: 10.1029/2005JD006047 (2006).
[CrossRef]

Cazorla, A.

de Cabo, X.

V. Estellés, M. P. Utrillas, J. A. Martínez-Lozano, A. Alcántara, L. Alados-Arboledas, F. J. Olmo, J. Lorente, X. de Cabo, V. Cachorro, H. Horvath, A. Labajo, M. Sorribas, J. P. Díaz, A. M. Díaz, A. M. Silva, T. Elías, M. Pujadas, J. A. Rodrigues, J. Cañada, and Y. García, “Intercomparison of spectroradiometers and sunphotometers for the determination of the aerosol optical depth during the VELETA-2002 field campaign,” J. Geophys. Res. 111, D17207, doi: 10.1029/2005JD006047 (2006).
[CrossRef]

Díaz, A. M.

V. Estellés, M. P. Utrillas, J. A. Martínez-Lozano, A. Alcántara, L. Alados-Arboledas, F. J. Olmo, J. Lorente, X. de Cabo, V. Cachorro, H. Horvath, A. Labajo, M. Sorribas, J. P. Díaz, A. M. Díaz, A. M. Silva, T. Elías, M. Pujadas, J. A. Rodrigues, J. Cañada, and Y. García, “Intercomparison of spectroradiometers and sunphotometers for the determination of the aerosol optical depth during the VELETA-2002 field campaign,” J. Geophys. Res. 111, D17207, doi: 10.1029/2005JD006047 (2006).
[CrossRef]

Díaz, J. P.

V. Estellés, M. P. Utrillas, J. A. Martínez-Lozano, A. Alcántara, L. Alados-Arboledas, F. J. Olmo, J. Lorente, X. de Cabo, V. Cachorro, H. Horvath, A. Labajo, M. Sorribas, J. P. Díaz, A. M. Díaz, A. M. Silva, T. Elías, M. Pujadas, J. A. Rodrigues, J. Cañada, and Y. García, “Intercomparison of spectroradiometers and sunphotometers for the determination of the aerosol optical depth during the VELETA-2002 field campaign,” J. Geophys. Res. 111, D17207, doi: 10.1029/2005JD006047 (2006).
[CrossRef]

Dubovik, O.

O. Dubovik, B. N. Holben, T. Lapyonok, A. Sinyuk, M. I. Mishchenko, P. Yang, and I. Slutsker, “Non-spherical aerosol retrieval method employing light scattering by spheroids,” Geophys. Res. Lett. 29, 1415 (2002).
[CrossRef]

A. Smirnov, B. N. Holben, T. F. Eck, O. Dubovik, and I. Slutsker, “Cloud-screening and quality control algorithms for the AERONET database,” Remote Sens. Environ. 73, 337-349(2000).
[CrossRef]

Eck, T. F.

Y. J. Kaufman, D. Tanré, B. N. Holben, S. Mattoo, L. A. Remer, and T. F. Eck, “Aerosol radiative impact on spectral solar flux at the surface, derived from principal plane sky measurements,” J. Atmos. Sci. 59, 635-646 (2002).
[CrossRef]

A. Smirnov, B. N. Holben, T. F. Eck, O. Dubovik, and I. Slutsker, “Cloud-screening and quality control algorithms for the AERONET database,” Remote Sens. Environ. 73, 337-349(2000).
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B. N. Holben, T. F. Eck, I. Slutsker, D. Tanre, J. P. Buis, A. Setzer, E. Vermote, J. A. Reagan, Y. J. Kaufman, T. Nakajima, F. Lavenu, I. Jankowiak, and A. Smirnov, “AERONET-a federated instrument network and data archive for aerosol characterization,” Remote Sens. Environ. 66, 1-16 (1998).
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V. Estellés, M. P. Utrillas, J. A. Martínez-Lozano, A. Alcántara, L. Alados-Arboledas, F. J. Olmo, J. Lorente, X. de Cabo, V. Cachorro, H. Horvath, A. Labajo, M. Sorribas, J. P. Díaz, A. M. Díaz, A. M. Silva, T. Elías, M. Pujadas, J. A. Rodrigues, J. Cañada, and Y. García, “Intercomparison of spectroradiometers and sunphotometers for the determination of the aerosol optical depth during the VELETA-2002 field campaign,” J. Geophys. Res. 111, D17207, doi: 10.1029/2005JD006047 (2006).
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V. Estellés, M. P. Utrillas, J. A. Martínez-Lozano, A. Alcántara, L. Alados-Arboledas, F. J. Olmo, J. Lorente, X. de Cabo, V. Cachorro, H. Horvath, A. Labajo, M. Sorribas, J. P. Díaz, A. M. Díaz, A. M. Silva, T. Elías, M. Pujadas, J. A. Rodrigues, J. Cañada, and Y. García, “Intercomparison of spectroradiometers and sunphotometers for the determination of the aerosol optical depth during the VELETA-2002 field campaign,” J. Geophys. Res. 111, D17207, doi: 10.1029/2005JD006047 (2006).
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P. Forster, V. Ramaswamy, P. Artaxo, T. Berntsen, R. Betts, D. W. Fahey, J. Haywood, J. Lean, D. C. Lowe, G. Myhre, J. Nganga, R. Prinn, G. Raga, M. Schultz, and R. Van Dorland, “Changes in atmospheric constituents and in radiative forcing,” in Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, S. Solomon, D. Qin, M. Manning, Z. Chen, M. Marquis, K. B. Averyt, M. Tignor, and H. L. Miller, eds. (Cambridge U. Press, 2007).

Forster, P.

P. Forster, V. Ramaswamy, P. Artaxo, T. Berntsen, R. Betts, D. W. Fahey, J. Haywood, J. Lean, D. C. Lowe, G. Myhre, J. Nganga, R. Prinn, G. Raga, M. Schultz, and R. Van Dorland, “Changes in atmospheric constituents and in radiative forcing,” in Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, S. Solomon, D. Qin, M. Manning, Z. Chen, M. Marquis, K. B. Averyt, M. Tignor, and H. L. Miller, eds. (Cambridge U. Press, 2007).

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V. Estellés, M. P. Utrillas, J. A. Martínez-Lozano, A. Alcántara, L. Alados-Arboledas, F. J. Olmo, J. Lorente, X. de Cabo, V. Cachorro, H. Horvath, A. Labajo, M. Sorribas, J. P. Díaz, A. M. Díaz, A. M. Silva, T. Elías, M. Pujadas, J. A. Rodrigues, J. Cañada, and Y. García, “Intercomparison of spectroradiometers and sunphotometers for the determination of the aerosol optical depth during the VELETA-2002 field campaign,” J. Geophys. Res. 111, D17207, doi: 10.1029/2005JD006047 (2006).
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P. Forster, V. Ramaswamy, P. Artaxo, T. Berntsen, R. Betts, D. W. Fahey, J. Haywood, J. Lean, D. C. Lowe, G. Myhre, J. Nganga, R. Prinn, G. Raga, M. Schultz, and R. Van Dorland, “Changes in atmospheric constituents and in radiative forcing,” in Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, S. Solomon, D. Qin, M. Manning, Z. Chen, M. Marquis, K. B. Averyt, M. Tignor, and H. L. Miller, eds. (Cambridge U. Press, 2007).

Hernández-Andrés, J.

Holben, B. N.

O. Dubovik, B. N. Holben, T. Lapyonok, A. Sinyuk, M. I. Mishchenko, P. Yang, and I. Slutsker, “Non-spherical aerosol retrieval method employing light scattering by spheroids,” Geophys. Res. Lett. 29, 1415 (2002).
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Y. J. Kaufman, D. Tanré, B. N. Holben, S. Mattoo, L. A. Remer, and T. F. Eck, “Aerosol radiative impact on spectral solar flux at the surface, derived from principal plane sky measurements,” J. Atmos. Sci. 59, 635-646 (2002).
[CrossRef]

A. Smirnov, B. N. Holben, T. F. Eck, O. Dubovik, and I. Slutsker, “Cloud-screening and quality control algorithms for the AERONET database,” Remote Sens. Environ. 73, 337-349(2000).
[CrossRef]

B. N. Holben, T. F. Eck, I. Slutsker, D. Tanre, J. P. Buis, A. Setzer, E. Vermote, J. A. Reagan, Y. J. Kaufman, T. Nakajima, F. Lavenu, I. Jankowiak, and A. Smirnov, “AERONET-a federated instrument network and data archive for aerosol characterization,” Remote Sens. Environ. 66, 1-16 (1998).
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V. Estellés, M. P. Utrillas, J. A. Martínez-Lozano, A. Alcántara, L. Alados-Arboledas, F. J. Olmo, J. Lorente, X. de Cabo, V. Cachorro, H. Horvath, A. Labajo, M. Sorribas, J. P. Díaz, A. M. Díaz, A. M. Silva, T. Elías, M. Pujadas, J. A. Rodrigues, J. Cañada, and Y. García, “Intercomparison of spectroradiometers and sunphotometers for the determination of the aerosol optical depth during the VELETA-2002 field campaign,” J. Geophys. Res. 111, D17207, doi: 10.1029/2005JD006047 (2006).
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Jankowiak, I.

B. N. Holben, T. F. Eck, I. Slutsker, D. Tanre, J. P. Buis, A. Setzer, E. Vermote, J. A. Reagan, Y. J. Kaufman, T. Nakajima, F. Lavenu, I. Jankowiak, and A. Smirnov, “AERONET-a federated instrument network and data archive for aerosol characterization,” Remote Sens. Environ. 66, 1-16 (1998).
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Kamei, A.

N. Kikuchi, T. Nakajima, H. Kumagai, H. Kuroiwa, A. Kamei, R. Nakamura, and T. Y. Nakajima, “Cloud optical thicness and effective particle radius derived from transmitted solar radiation measurements: comparison with cloud radar observations,” J. Geophys. Res. 111, D07205, doi:10.1029/2005JD006363 (2006).
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Kaufman, Y.

D. Tanré, Y. Kaufman, T. Nakajima, and V. Ramanathan, “Preface to special section on global aerosol system,” J. Geophys. Res. 110, D10S01 doi: 10.1029/2004JD005724 (2005).
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Kaufman, Y. J.

Y. J. Kaufman, D. Tanré, B. N. Holben, S. Mattoo, L. A. Remer, and T. F. Eck, “Aerosol radiative impact on spectral solar flux at the surface, derived from principal plane sky measurements,” J. Atmos. Sci. 59, 635-646 (2002).
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Y. J. Kaufman, D. Tanré, and O. Boucher, “A satellite view of aerosols in the climate system,” Nature 419, 215-223 (2002).
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B. N. Holben, T. F. Eck, I. Slutsker, D. Tanre, J. P. Buis, A. Setzer, E. Vermote, J. A. Reagan, Y. J. Kaufman, T. Nakajima, F. Lavenu, I. Jankowiak, and A. Smirnov, “AERONET-a federated instrument network and data archive for aerosol characterization,” Remote Sens. Environ. 66, 1-16 (1998).
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Kikuchi, N.

N. Kikuchi, T. Nakajima, H. Kumagai, H. Kuroiwa, A. Kamei, R. Nakamura, and T. Y. Nakajima, “Cloud optical thicness and effective particle radius derived from transmitted solar radiation measurements: comparison with cloud radar observations,” J. Geophys. Res. 111, D07205, doi:10.1029/2005JD006363 (2006).
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Kumagai, H.

N. Kikuchi, T. Nakajima, H. Kumagai, H. Kuroiwa, A. Kamei, R. Nakamura, and T. Y. Nakajima, “Cloud optical thicness and effective particle radius derived from transmitted solar radiation measurements: comparison with cloud radar observations,” J. Geophys. Res. 111, D07205, doi:10.1029/2005JD006363 (2006).
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Kuroiwa, H.

N. Kikuchi, T. Nakajima, H. Kumagai, H. Kuroiwa, A. Kamei, R. Nakamura, and T. Y. Nakajima, “Cloud optical thicness and effective particle radius derived from transmitted solar radiation measurements: comparison with cloud radar observations,” J. Geophys. Res. 111, D07205, doi:10.1029/2005JD006363 (2006).
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Labajo, A.

V. Estellés, M. P. Utrillas, J. A. Martínez-Lozano, A. Alcántara, L. Alados-Arboledas, F. J. Olmo, J. Lorente, X. de Cabo, V. Cachorro, H. Horvath, A. Labajo, M. Sorribas, J. P. Díaz, A. M. Díaz, A. M. Silva, T. Elías, M. Pujadas, J. A. Rodrigues, J. Cañada, and Y. García, “Intercomparison of spectroradiometers and sunphotometers for the determination of the aerosol optical depth during the VELETA-2002 field campaign,” J. Geophys. Res. 111, D17207, doi: 10.1029/2005JD006047 (2006).
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Lapyonok, T.

O. Dubovik, B. N. Holben, T. Lapyonok, A. Sinyuk, M. I. Mishchenko, P. Yang, and I. Slutsker, “Non-spherical aerosol retrieval method employing light scattering by spheroids,” Geophys. Res. Lett. 29, 1415 (2002).
[CrossRef]

Lara, V.

F. J. Olmo, A. Quirantes, V. Lara, H. Lyamani, and L. Alados-Arboledas, “Aerosol optical properties assessed by an inversion method using the solar principal plane for nonspherical particles,” J. Quant. Spectrosc. Radiat. Transfer 109, 1504-1516 (2008).
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Lavenu, F.

B. N. Holben, T. F. Eck, I. Slutsker, D. Tanre, J. P. Buis, A. Setzer, E. Vermote, J. A. Reagan, Y. J. Kaufman, T. Nakajima, F. Lavenu, I. Jankowiak, and A. Smirnov, “AERONET-a federated instrument network and data archive for aerosol characterization,” Remote Sens. Environ. 66, 1-16 (1998).
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Lean, J.

P. Forster, V. Ramaswamy, P. Artaxo, T. Berntsen, R. Betts, D. W. Fahey, J. Haywood, J. Lean, D. C. Lowe, G. Myhre, J. Nganga, R. Prinn, G. Raga, M. Schultz, and R. Van Dorland, “Changes in atmospheric constituents and in radiative forcing,” in Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, S. Solomon, D. Qin, M. Manning, Z. Chen, M. Marquis, K. B. Averyt, M. Tignor, and H. L. Miller, eds. (Cambridge U. Press, 2007).

Lee, Jr., R. L.

Long, C. N.

C. N. Long, J. M. Sabburg, J. Calbó, and D. Pagès, “Retrieving cloud characteristics from ground based daytime color all-sky images,” J. Atmos. Ocean. Technol. 23, 633-652 (2006).
[CrossRef]

López-Álvarez, M. A.

Lorente, J.

V. Estellés, M. P. Utrillas, J. A. Martínez-Lozano, A. Alcántara, L. Alados-Arboledas, F. J. Olmo, J. Lorente, X. de Cabo, V. Cachorro, H. Horvath, A. Labajo, M. Sorribas, J. P. Díaz, A. M. Díaz, A. M. Silva, T. Elías, M. Pujadas, J. A. Rodrigues, J. Cañada, and Y. García, “Intercomparison of spectroradiometers and sunphotometers for the determination of the aerosol optical depth during the VELETA-2002 field campaign,” J. Geophys. Res. 111, D17207, doi: 10.1029/2005JD006047 (2006).
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P. Forster, V. Ramaswamy, P. Artaxo, T. Berntsen, R. Betts, D. W. Fahey, J. Haywood, J. Lean, D. C. Lowe, G. Myhre, J. Nganga, R. Prinn, G. Raga, M. Schultz, and R. Van Dorland, “Changes in atmospheric constituents and in radiative forcing,” in Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, S. Solomon, D. Qin, M. Manning, Z. Chen, M. Marquis, K. B. Averyt, M. Tignor, and H. L. Miller, eds. (Cambridge U. Press, 2007).

Lyamani, H.

F. J. Olmo, A. Quirantes, V. Lara, H. Lyamani, and L. Alados-Arboledas, “Aerosol optical properties assessed by an inversion method using the solar principal plane for nonspherical particles,” J. Quant. Spectrosc. Radiat. Transfer 109, 1504-1516 (2008).
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H. Lyamani, F. J. Olmo, A. Alcántara, and L. Alados-Arboledas, “Atmospheric aerosols during the 2003 heat wave in southeastern Spain I: spectral optical depth,” Atmos. Environ. 40, 6453-6464 (2006).
[CrossRef]

F. J. Olmo, A. Quirantes, A. Alcántara, H. Lyamani, and L. Alados-Arboledas, “Preliminary results of a nonspherical aerosol method for the retrieval of the atmospheric aerosol optical properties,” J. Quant. Spectrosc. Radiat. Transf. 100, 305-314 (2006).
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L. Alados-Arboledas, H. Lyamani, and F. J. Olmo, “Aerosol size properties at Armilla, Granada (Spain),” Q. J. R. Meteorol. Soc. 129, 1395-1413 (2003).
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Manning, M.

P. Forster, V. Ramaswamy, P. Artaxo, T. Berntsen, R. Betts, D. W. Fahey, J. Haywood, J. Lean, D. C. Lowe, G. Myhre, J. Nganga, R. Prinn, G. Raga, M. Schultz, and R. Van Dorland, “Changes in atmospheric constituents and in radiative forcing,” in Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, S. Solomon, D. Qin, M. Manning, Z. Chen, M. Marquis, K. B. Averyt, M. Tignor, and H. L. Miller, eds. (Cambridge U. Press, 2007).

Martínez-Lozano, J. A.

V. Estellés, M. P. Utrillas, J. A. Martínez-Lozano, A. Alcántara, L. Alados-Arboledas, F. J. Olmo, J. Lorente, X. de Cabo, V. Cachorro, H. Horvath, A. Labajo, M. Sorribas, J. P. Díaz, A. M. Díaz, A. M. Silva, T. Elías, M. Pujadas, J. A. Rodrigues, J. Cañada, and Y. García, “Intercomparison of spectroradiometers and sunphotometers for the determination of the aerosol optical depth during the VELETA-2002 field campaign,” J. Geophys. Res. 111, D17207, doi: 10.1029/2005JD006047 (2006).
[CrossRef]

Mattoo, S.

Y. J. Kaufman, D. Tanré, B. N. Holben, S. Mattoo, L. A. Remer, and T. F. Eck, “Aerosol radiative impact on spectral solar flux at the surface, derived from principal plane sky measurements,” J. Atmos. Sci. 59, 635-646 (2002).
[CrossRef]

Mishchenko, M. I.

O. Dubovik, B. N. Holben, T. Lapyonok, A. Sinyuk, M. I. Mishchenko, P. Yang, and I. Slutsker, “Non-spherical aerosol retrieval method employing light scattering by spheroids,” Geophys. Res. Lett. 29, 1415 (2002).
[CrossRef]

Myhre, G.

P. Forster, V. Ramaswamy, P. Artaxo, T. Berntsen, R. Betts, D. W. Fahey, J. Haywood, J. Lean, D. C. Lowe, G. Myhre, J. Nganga, R. Prinn, G. Raga, M. Schultz, and R. Van Dorland, “Changes in atmospheric constituents and in radiative forcing,” in Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, S. Solomon, D. Qin, M. Manning, Z. Chen, M. Marquis, K. B. Averyt, M. Tignor, and H. L. Miller, eds. (Cambridge U. Press, 2007).

Nakajima, T.

N. Kikuchi, T. Nakajima, H. Kumagai, H. Kuroiwa, A. Kamei, R. Nakamura, and T. Y. Nakajima, “Cloud optical thicness and effective particle radius derived from transmitted solar radiation measurements: comparison with cloud radar observations,” J. Geophys. Res. 111, D07205, doi:10.1029/2005JD006363 (2006).
[CrossRef]

D. Tanré, Y. Kaufman, T. Nakajima, and V. Ramanathan, “Preface to special section on global aerosol system,” J. Geophys. Res. 110, D10S01 doi: 10.1029/2004JD005724 (2005).
[CrossRef]

B. N. Holben, T. F. Eck, I. Slutsker, D. Tanre, J. P. Buis, A. Setzer, E. Vermote, J. A. Reagan, Y. J. Kaufman, T. Nakajima, F. Lavenu, I. Jankowiak, and A. Smirnov, “AERONET-a federated instrument network and data archive for aerosol characterization,” Remote Sens. Environ. 66, 1-16 (1998).
[CrossRef]

Nakajima, T. Y.

N. Kikuchi, T. Nakajima, H. Kumagai, H. Kuroiwa, A. Kamei, R. Nakamura, and T. Y. Nakajima, “Cloud optical thicness and effective particle radius derived from transmitted solar radiation measurements: comparison with cloud radar observations,” J. Geophys. Res. 111, D07205, doi:10.1029/2005JD006363 (2006).
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Nakamura, R.

N. Kikuchi, T. Nakajima, H. Kumagai, H. Kuroiwa, A. Kamei, R. Nakamura, and T. Y. Nakajima, “Cloud optical thicness and effective particle radius derived from transmitted solar radiation measurements: comparison with cloud radar observations,” J. Geophys. Res. 111, D07205, doi:10.1029/2005JD006363 (2006).
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Nascimento, S. M. C.

Nganga, J.

P. Forster, V. Ramaswamy, P. Artaxo, T. Berntsen, R. Betts, D. W. Fahey, J. Haywood, J. Lean, D. C. Lowe, G. Myhre, J. Nganga, R. Prinn, G. Raga, M. Schultz, and R. Van Dorland, “Changes in atmospheric constituents and in radiative forcing,” in Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, S. Solomon, D. Qin, M. Manning, Z. Chen, M. Marquis, K. B. Averyt, M. Tignor, and H. L. Miller, eds. (Cambridge U. Press, 2007).

Nieves, J. L.

Olmo, F. J.

D. Pérez-Ramírez, B. Ruiz, J. Aceituno, F. J. Olmo, and L. Alados-Arboledas, “Application of Sun/star photometry to derive the aerosol optical depth,” Int. J. Remote Sens. 29, 5113-5132 (2008).
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M. A. López-Álvarez, J. Hernández-Andrés, J. Romero, F. J. Olmo, A. Cazorla, and L. Alados-Arboledas, “Using a trichromatic CCD camera for spectral skylight estimation,” Appl. Opt. 47, H31-H38 (2008).
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A. Cazorla, F. J. Olmo, and L. Alados-Arboledas, “Using a sky Imager for aerosol characterization,” Atmos. Environ. 42, 2739-2745 (2008).
[CrossRef]

A. Cazorla, F. J. Olmo, and L. Alados-Arboledas, “Development of a sky imager for cloud cover assessment,” J. Opt. Soc. Am. A 25, 29-39 (2008).
[CrossRef]

F. J. Olmo, A. Quirantes, V. Lara, H. Lyamani, and L. Alados-Arboledas, “Aerosol optical properties assessed by an inversion method using the solar principal plane for nonspherical particles,” J. Quant. Spectrosc. Radiat. Transfer 109, 1504-1516 (2008).
[CrossRef]

D. Pérez-Ramírez, J. Aceituno, B. Ruiz, F. J. Olmo, and L. Alados-Arboledas, “Development and calibration of a star photometer to measure the aerosol optical depth: smoke observations at a high mountain site,” Atmos. Environ. 42, 2733-2738 (2008).
[CrossRef]

V. Estellés, M. P. Utrillas, J. A. Martínez-Lozano, A. Alcántara, L. Alados-Arboledas, F. J. Olmo, J. Lorente, X. de Cabo, V. Cachorro, H. Horvath, A. Labajo, M. Sorribas, J. P. Díaz, A. M. Díaz, A. M. Silva, T. Elías, M. Pujadas, J. A. Rodrigues, J. Cañada, and Y. García, “Intercomparison of spectroradiometers and sunphotometers for the determination of the aerosol optical depth during the VELETA-2002 field campaign,” J. Geophys. Res. 111, D17207, doi: 10.1029/2005JD006047 (2006).
[CrossRef]

F. J. Olmo, A. Quirantes, A. Alcántara, H. Lyamani, and L. Alados-Arboledas, “Preliminary results of a nonspherical aerosol method for the retrieval of the atmospheric aerosol optical properties,” J. Quant. Spectrosc. Radiat. Transf. 100, 305-314 (2006).
[CrossRef]

H. Lyamani, F. J. Olmo, A. Alcántara, and L. Alados-Arboledas, “Atmospheric aerosols during the 2003 heat wave in southeastern Spain I: spectral optical depth,” Atmos. Environ. 40, 6453-6464 (2006).
[CrossRef]

A. Alcántara-Ruiz, F. J. Olmo, and L. Alados-Arboledas, “Langley calibrations of sunphotometer at Sierra Nevada, Granada, Spain,” Opt. Pura Apl. 37, 3263-3269 (2004).

L. Alados-Arboledas, H. Lyamani, and F. J. Olmo, “Aerosol size properties at Armilla, Granada (Spain),” Q. J. R. Meteorol. Soc. 129, 1395-1413 (2003).
[CrossRef]

C. Sánchez, F. J. Olmo, and L. Alados-Arboledas, “Determination of aerosol optical thickness from measurements of spectral sky radiance,” J. Aerosol Sci. 29, 1199-1211 (1998).
[CrossRef]

Pagès, D.

C. N. Long, J. M. Sabburg, J. Calbó, and D. Pagès, “Retrieving cloud characteristics from ground based daytime color all-sky images,” J. Atmos. Ocean. Technol. 23, 633-652 (2006).
[CrossRef]

Pérez-Ramírez, D.

D. Pérez-Ramírez, B. Ruiz, J. Aceituno, F. J. Olmo, and L. Alados-Arboledas, “Application of Sun/star photometry to derive the aerosol optical depth,” Int. J. Remote Sens. 29, 5113-5132 (2008).
[CrossRef]

D. Pérez-Ramírez, J. Aceituno, B. Ruiz, F. J. Olmo, and L. Alados-Arboledas, “Development and calibration of a star photometer to measure the aerosol optical depth: smoke observations at a high mountain site,” Atmos. Environ. 42, 2733-2738 (2008).
[CrossRef]

Prinn, R.

P. Forster, V. Ramaswamy, P. Artaxo, T. Berntsen, R. Betts, D. W. Fahey, J. Haywood, J. Lean, D. C. Lowe, G. Myhre, J. Nganga, R. Prinn, G. Raga, M. Schultz, and R. Van Dorland, “Changes in atmospheric constituents and in radiative forcing,” in Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, S. Solomon, D. Qin, M. Manning, Z. Chen, M. Marquis, K. B. Averyt, M. Tignor, and H. L. Miller, eds. (Cambridge U. Press, 2007).

Pujadas, M.

V. Estellés, M. P. Utrillas, J. A. Martínez-Lozano, A. Alcántara, L. Alados-Arboledas, F. J. Olmo, J. Lorente, X. de Cabo, V. Cachorro, H. Horvath, A. Labajo, M. Sorribas, J. P. Díaz, A. M. Díaz, A. M. Silva, T. Elías, M. Pujadas, J. A. Rodrigues, J. Cañada, and Y. García, “Intercomparison of spectroradiometers and sunphotometers for the determination of the aerosol optical depth during the VELETA-2002 field campaign,” J. Geophys. Res. 111, D17207, doi: 10.1029/2005JD006047 (2006).
[CrossRef]

Quirantes, A.

F. J. Olmo, A. Quirantes, V. Lara, H. Lyamani, and L. Alados-Arboledas, “Aerosol optical properties assessed by an inversion method using the solar principal plane for nonspherical particles,” J. Quant. Spectrosc. Radiat. Transfer 109, 1504-1516 (2008).
[CrossRef]

F. J. Olmo, A. Quirantes, A. Alcántara, H. Lyamani, and L. Alados-Arboledas, “Preliminary results of a nonspherical aerosol method for the retrieval of the atmospheric aerosol optical properties,” J. Quant. Spectrosc. Radiat. Transf. 100, 305-314 (2006).
[CrossRef]

Raga, G.

P. Forster, V. Ramaswamy, P. Artaxo, T. Berntsen, R. Betts, D. W. Fahey, J. Haywood, J. Lean, D. C. Lowe, G. Myhre, J. Nganga, R. Prinn, G. Raga, M. Schultz, and R. Van Dorland, “Changes in atmospheric constituents and in radiative forcing,” in Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, S. Solomon, D. Qin, M. Manning, Z. Chen, M. Marquis, K. B. Averyt, M. Tignor, and H. L. Miller, eds. (Cambridge U. Press, 2007).

Ramanathan, V.

D. Tanré, Y. Kaufman, T. Nakajima, and V. Ramanathan, “Preface to special section on global aerosol system,” J. Geophys. Res. 110, D10S01 doi: 10.1029/2004JD005724 (2005).
[CrossRef]

Ramaswamy, V.

P. Forster, V. Ramaswamy, P. Artaxo, T. Berntsen, R. Betts, D. W. Fahey, J. Haywood, J. Lean, D. C. Lowe, G. Myhre, J. Nganga, R. Prinn, G. Raga, M. Schultz, and R. Van Dorland, “Changes in atmospheric constituents and in radiative forcing,” in Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, S. Solomon, D. Qin, M. Manning, Z. Chen, M. Marquis, K. B. Averyt, M. Tignor, and H. L. Miller, eds. (Cambridge U. Press, 2007).

Reagan, J. A.

B. N. Holben, T. F. Eck, I. Slutsker, D. Tanre, J. P. Buis, A. Setzer, E. Vermote, J. A. Reagan, Y. J. Kaufman, T. Nakajima, F. Lavenu, I. Jankowiak, and A. Smirnov, “AERONET-a federated instrument network and data archive for aerosol characterization,” Remote Sens. Environ. 66, 1-16 (1998).
[CrossRef]

Remer, L. A.

Y. J. Kaufman, D. Tanré, B. N. Holben, S. Mattoo, L. A. Remer, and T. F. Eck, “Aerosol radiative impact on spectral solar flux at the surface, derived from principal plane sky measurements,” J. Atmos. Sci. 59, 635-646 (2002).
[CrossRef]

Ricchiazzi, P.

P. Ricchiazzi, S. Yang, C. Gautier, and D. Sowle, “SBDART: A research and teaching software tool for plane-parallel radiative transfer in the Earth's atmosphere,” Bull. Amer. Meteorol. Soc. 79, 2101-2113 (1998).
[CrossRef]

Rodrigues, J. A.

V. Estellés, M. P. Utrillas, J. A. Martínez-Lozano, A. Alcántara, L. Alados-Arboledas, F. J. Olmo, J. Lorente, X. de Cabo, V. Cachorro, H. Horvath, A. Labajo, M. Sorribas, J. P. Díaz, A. M. Díaz, A. M. Silva, T. Elías, M. Pujadas, J. A. Rodrigues, J. Cañada, and Y. García, “Intercomparison of spectroradiometers and sunphotometers for the determination of the aerosol optical depth during the VELETA-2002 field campaign,” J. Geophys. Res. 111, D17207, doi: 10.1029/2005JD006047 (2006).
[CrossRef]

Romero, J.

Ruiz, B.

D. Pérez-Ramírez, J. Aceituno, B. Ruiz, F. J. Olmo, and L. Alados-Arboledas, “Development and calibration of a star photometer to measure the aerosol optical depth: smoke observations at a high mountain site,” Atmos. Environ. 42, 2733-2738 (2008).
[CrossRef]

D. Pérez-Ramírez, B. Ruiz, J. Aceituno, F. J. Olmo, and L. Alados-Arboledas, “Application of Sun/star photometry to derive the aerosol optical depth,” Int. J. Remote Sens. 29, 5113-5132 (2008).
[CrossRef]

Sabburg, J. M.

C. N. Long, J. M. Sabburg, J. Calbó, and D. Pagès, “Retrieving cloud characteristics from ground based daytime color all-sky images,” J. Atmos. Ocean. Technol. 23, 633-652 (2006).
[CrossRef]

Sánchez, C.

C. Sánchez, F. J. Olmo, and L. Alados-Arboledas, “Determination of aerosol optical thickness from measurements of spectral sky radiance,” J. Aerosol Sci. 29, 1199-1211 (1998).
[CrossRef]

Schultz, M.

P. Forster, V. Ramaswamy, P. Artaxo, T. Berntsen, R. Betts, D. W. Fahey, J. Haywood, J. Lean, D. C. Lowe, G. Myhre, J. Nganga, R. Prinn, G. Raga, M. Schultz, and R. Van Dorland, “Changes in atmospheric constituents and in radiative forcing,” in Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, S. Solomon, D. Qin, M. Manning, Z. Chen, M. Marquis, K. B. Averyt, M. Tignor, and H. L. Miller, eds. (Cambridge U. Press, 2007).

Setzer, A.

B. N. Holben, T. F. Eck, I. Slutsker, D. Tanre, J. P. Buis, A. Setzer, E. Vermote, J. A. Reagan, Y. J. Kaufman, T. Nakajima, F. Lavenu, I. Jankowiak, and A. Smirnov, “AERONET-a federated instrument network and data archive for aerosol characterization,” Remote Sens. Environ. 66, 1-16 (1998).
[CrossRef]

Silva, A. M.

V. Estellés, M. P. Utrillas, J. A. Martínez-Lozano, A. Alcántara, L. Alados-Arboledas, F. J. Olmo, J. Lorente, X. de Cabo, V. Cachorro, H. Horvath, A. Labajo, M. Sorribas, J. P. Díaz, A. M. Díaz, A. M. Silva, T. Elías, M. Pujadas, J. A. Rodrigues, J. Cañada, and Y. García, “Intercomparison of spectroradiometers and sunphotometers for the determination of the aerosol optical depth during the VELETA-2002 field campaign,” J. Geophys. Res. 111, D17207, doi: 10.1029/2005JD006047 (2006).
[CrossRef]

Sinyuk, A.

O. Dubovik, B. N. Holben, T. Lapyonok, A. Sinyuk, M. I. Mishchenko, P. Yang, and I. Slutsker, “Non-spherical aerosol retrieval method employing light scattering by spheroids,” Geophys. Res. Lett. 29, 1415 (2002).
[CrossRef]

Slutsker, I.

O. Dubovik, B. N. Holben, T. Lapyonok, A. Sinyuk, M. I. Mishchenko, P. Yang, and I. Slutsker, “Non-spherical aerosol retrieval method employing light scattering by spheroids,” Geophys. Res. Lett. 29, 1415 (2002).
[CrossRef]

A. Smirnov, B. N. Holben, T. F. Eck, O. Dubovik, and I. Slutsker, “Cloud-screening and quality control algorithms for the AERONET database,” Remote Sens. Environ. 73, 337-349(2000).
[CrossRef]

B. N. Holben, T. F. Eck, I. Slutsker, D. Tanre, J. P. Buis, A. Setzer, E. Vermote, J. A. Reagan, Y. J. Kaufman, T. Nakajima, F. Lavenu, I. Jankowiak, and A. Smirnov, “AERONET-a federated instrument network and data archive for aerosol characterization,” Remote Sens. Environ. 66, 1-16 (1998).
[CrossRef]

Smirnov, A.

A. Smirnov, B. N. Holben, T. F. Eck, O. Dubovik, and I. Slutsker, “Cloud-screening and quality control algorithms for the AERONET database,” Remote Sens. Environ. 73, 337-349(2000).
[CrossRef]

B. N. Holben, T. F. Eck, I. Slutsker, D. Tanre, J. P. Buis, A. Setzer, E. Vermote, J. A. Reagan, Y. J. Kaufman, T. Nakajima, F. Lavenu, I. Jankowiak, and A. Smirnov, “AERONET-a federated instrument network and data archive for aerosol characterization,” Remote Sens. Environ. 66, 1-16 (1998).
[CrossRef]

Sorribas, M.

V. Estellés, M. P. Utrillas, J. A. Martínez-Lozano, A. Alcántara, L. Alados-Arboledas, F. J. Olmo, J. Lorente, X. de Cabo, V. Cachorro, H. Horvath, A. Labajo, M. Sorribas, J. P. Díaz, A. M. Díaz, A. M. Silva, T. Elías, M. Pujadas, J. A. Rodrigues, J. Cañada, and Y. García, “Intercomparison of spectroradiometers and sunphotometers for the determination of the aerosol optical depth during the VELETA-2002 field campaign,” J. Geophys. Res. 111, D17207, doi: 10.1029/2005JD006047 (2006).
[CrossRef]

Sowle, D.

P. Ricchiazzi, S. Yang, C. Gautier, and D. Sowle, “SBDART: A research and teaching software tool for plane-parallel radiative transfer in the Earth's atmosphere,” Bull. Amer. Meteorol. Soc. 79, 2101-2113 (1998).
[CrossRef]

Stamnes, K.

Tanre, D.

B. N. Holben, T. F. Eck, I. Slutsker, D. Tanre, J. P. Buis, A. Setzer, E. Vermote, J. A. Reagan, Y. J. Kaufman, T. Nakajima, F. Lavenu, I. Jankowiak, and A. Smirnov, “AERONET-a federated instrument network and data archive for aerosol characterization,” Remote Sens. Environ. 66, 1-16 (1998).
[CrossRef]

Tanré, D.

D. Tanré, Y. Kaufman, T. Nakajima, and V. Ramanathan, “Preface to special section on global aerosol system,” J. Geophys. Res. 110, D10S01 doi: 10.1029/2004JD005724 (2005).
[CrossRef]

Y. J. Kaufman, D. Tanré, and O. Boucher, “A satellite view of aerosols in the climate system,” Nature 419, 215-223 (2002).
[CrossRef] [PubMed]

Y. J. Kaufman, D. Tanré, B. N. Holben, S. Mattoo, L. A. Remer, and T. F. Eck, “Aerosol radiative impact on spectral solar flux at the surface, derived from principal plane sky measurements,” J. Atmos. Sci. 59, 635-646 (2002).
[CrossRef]

Tsay, S. C.

Utrillas, M. P.

V. Estellés, M. P. Utrillas, J. A. Martínez-Lozano, A. Alcántara, L. Alados-Arboledas, F. J. Olmo, J. Lorente, X. de Cabo, V. Cachorro, H. Horvath, A. Labajo, M. Sorribas, J. P. Díaz, A. M. Díaz, A. M. Silva, T. Elías, M. Pujadas, J. A. Rodrigues, J. Cañada, and Y. García, “Intercomparison of spectroradiometers and sunphotometers for the determination of the aerosol optical depth during the VELETA-2002 field campaign,” J. Geophys. Res. 111, D17207, doi: 10.1029/2005JD006047 (2006).
[CrossRef]

Valero, E. M.

Van Dorland, R.

P. Forster, V. Ramaswamy, P. Artaxo, T. Berntsen, R. Betts, D. W. Fahey, J. Haywood, J. Lean, D. C. Lowe, G. Myhre, J. Nganga, R. Prinn, G. Raga, M. Schultz, and R. Van Dorland, “Changes in atmospheric constituents and in radiative forcing,” in Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, S. Solomon, D. Qin, M. Manning, Z. Chen, M. Marquis, K. B. Averyt, M. Tignor, and H. L. Miller, eds. (Cambridge U. Press, 2007).

Vermote, E.

B. N. Holben, T. F. Eck, I. Slutsker, D. Tanre, J. P. Buis, A. Setzer, E. Vermote, J. A. Reagan, Y. J. Kaufman, T. Nakajima, F. Lavenu, I. Jankowiak, and A. Smirnov, “AERONET-a federated instrument network and data archive for aerosol characterization,” Remote Sens. Environ. 66, 1-16 (1998).
[CrossRef]

Wiscombe, W.

Yang, P.

O. Dubovik, B. N. Holben, T. Lapyonok, A. Sinyuk, M. I. Mishchenko, P. Yang, and I. Slutsker, “Non-spherical aerosol retrieval method employing light scattering by spheroids,” Geophys. Res. Lett. 29, 1415 (2002).
[CrossRef]

Yang, S.

P. Ricchiazzi, S. Yang, C. Gautier, and D. Sowle, “SBDART: A research and teaching software tool for plane-parallel radiative transfer in the Earth's atmosphere,” Bull. Amer. Meteorol. Soc. 79, 2101-2113 (1998).
[CrossRef]

Appl. Opt. (4)

Atmos. Environ. (3)

H. Lyamani, F. J. Olmo, A. Alcántara, and L. Alados-Arboledas, “Atmospheric aerosols during the 2003 heat wave in southeastern Spain I: spectral optical depth,” Atmos. Environ. 40, 6453-6464 (2006).
[CrossRef]

D. Pérez-Ramírez, J. Aceituno, B. Ruiz, F. J. Olmo, and L. Alados-Arboledas, “Development and calibration of a star photometer to measure the aerosol optical depth: smoke observations at a high mountain site,” Atmos. Environ. 42, 2733-2738 (2008).
[CrossRef]

A. Cazorla, F. J. Olmo, and L. Alados-Arboledas, “Using a sky Imager for aerosol characterization,” Atmos. Environ. 42, 2739-2745 (2008).
[CrossRef]

Bull. Amer. Meteorol. Soc. (1)

P. Ricchiazzi, S. Yang, C. Gautier, and D. Sowle, “SBDART: A research and teaching software tool for plane-parallel radiative transfer in the Earth's atmosphere,” Bull. Amer. Meteorol. Soc. 79, 2101-2113 (1998).
[CrossRef]

Geophys. Res. Lett. (1)

O. Dubovik, B. N. Holben, T. Lapyonok, A. Sinyuk, M. I. Mishchenko, P. Yang, and I. Slutsker, “Non-spherical aerosol retrieval method employing light scattering by spheroids,” Geophys. Res. Lett. 29, 1415 (2002).
[CrossRef]

Int. J. Remote Sens. (1)

D. Pérez-Ramírez, B. Ruiz, J. Aceituno, F. J. Olmo, and L. Alados-Arboledas, “Application of Sun/star photometry to derive the aerosol optical depth,” Int. J. Remote Sens. 29, 5113-5132 (2008).
[CrossRef]

J. Aerosol Sci. (1)

C. Sánchez, F. J. Olmo, and L. Alados-Arboledas, “Determination of aerosol optical thickness from measurements of spectral sky radiance,” J. Aerosol Sci. 29, 1199-1211 (1998).
[CrossRef]

J. Atmos. Ocean. Technol. (1)

C. N. Long, J. M. Sabburg, J. Calbó, and D. Pagès, “Retrieving cloud characteristics from ground based daytime color all-sky images,” J. Atmos. Ocean. Technol. 23, 633-652 (2006).
[CrossRef]

J. Atmos. Sci. (1)

Y. J. Kaufman, D. Tanré, B. N. Holben, S. Mattoo, L. A. Remer, and T. F. Eck, “Aerosol radiative impact on spectral solar flux at the surface, derived from principal plane sky measurements,” J. Atmos. Sci. 59, 635-646 (2002).
[CrossRef]

J. Geophys. Res. (3)

V. Estellés, M. P. Utrillas, J. A. Martínez-Lozano, A. Alcántara, L. Alados-Arboledas, F. J. Olmo, J. Lorente, X. de Cabo, V. Cachorro, H. Horvath, A. Labajo, M. Sorribas, J. P. Díaz, A. M. Díaz, A. M. Silva, T. Elías, M. Pujadas, J. A. Rodrigues, J. Cañada, and Y. García, “Intercomparison of spectroradiometers and sunphotometers for the determination of the aerosol optical depth during the VELETA-2002 field campaign,” J. Geophys. Res. 111, D17207, doi: 10.1029/2005JD006047 (2006).
[CrossRef]

D. Tanré, Y. Kaufman, T. Nakajima, and V. Ramanathan, “Preface to special section on global aerosol system,” J. Geophys. Res. 110, D10S01 doi: 10.1029/2004JD005724 (2005).
[CrossRef]

N. Kikuchi, T. Nakajima, H. Kumagai, H. Kuroiwa, A. Kamei, R. Nakamura, and T. Y. Nakajima, “Cloud optical thicness and effective particle radius derived from transmitted solar radiation measurements: comparison with cloud radar observations,” J. Geophys. Res. 111, D07205, doi:10.1029/2005JD006363 (2006).
[CrossRef]

J. Opt. Soc. Am. A (2)

J. Quant. Spectrosc. Radiat. Transf. (1)

F. J. Olmo, A. Quirantes, A. Alcántara, H. Lyamani, and L. Alados-Arboledas, “Preliminary results of a nonspherical aerosol method for the retrieval of the atmospheric aerosol optical properties,” J. Quant. Spectrosc. Radiat. Transf. 100, 305-314 (2006).
[CrossRef]

J. Quant. Spectrosc. Radiat. Transfer (1)

F. J. Olmo, A. Quirantes, V. Lara, H. Lyamani, and L. Alados-Arboledas, “Aerosol optical properties assessed by an inversion method using the solar principal plane for nonspherical particles,” J. Quant. Spectrosc. Radiat. Transfer 109, 1504-1516 (2008).
[CrossRef]

Nature (1)

Y. J. Kaufman, D. Tanré, and O. Boucher, “A satellite view of aerosols in the climate system,” Nature 419, 215-223 (2002).
[CrossRef] [PubMed]

Opt. Pura Apl. (1)

A. Alcántara-Ruiz, F. J. Olmo, and L. Alados-Arboledas, “Langley calibrations of sunphotometer at Sierra Nevada, Granada, Spain,” Opt. Pura Apl. 37, 3263-3269 (2004).

Q. J. R. Meteorol. Soc. (1)

L. Alados-Arboledas, H. Lyamani, and F. J. Olmo, “Aerosol size properties at Armilla, Granada (Spain),” Q. J. R. Meteorol. Soc. 129, 1395-1413 (2003).
[CrossRef]

Remote Sens. Environ. (2)

B. N. Holben, T. F. Eck, I. Slutsker, D. Tanre, J. P. Buis, A. Setzer, E. Vermote, J. A. Reagan, Y. J. Kaufman, T. Nakajima, F. Lavenu, I. Jankowiak, and A. Smirnov, “AERONET-a federated instrument network and data archive for aerosol characterization,” Remote Sens. Environ. 66, 1-16 (1998).
[CrossRef]

A. Smirnov, B. N. Holben, T. F. Eck, O. Dubovik, and I. Slutsker, “Cloud-screening and quality control algorithms for the AERONET database,” Remote Sens. Environ. 73, 337-349(2000).
[CrossRef]

Other (1)

P. Forster, V. Ramaswamy, P. Artaxo, T. Berntsen, R. Betts, D. W. Fahey, J. Haywood, J. Lean, D. C. Lowe, G. Myhre, J. Nganga, R. Prinn, G. Raga, M. Schultz, and R. Van Dorland, “Changes in atmospheric constituents and in radiative forcing,” in Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, S. Solomon, D. Qin, M. Manning, Z. Chen, M. Marquis, K. B. Averyt, M. Tignor, and H. L. Miller, eds. (Cambridge U. Press, 2007).

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Figures (7)

Fig. 1
Fig. 1

Picture of the CCD camera system and the Sun tracker.

Fig. 2
Fig. 2

Sky image example captured and processed by the system.

Fig. 3
Fig. 3

Sky image example captured and zenithal spectral radiance assessed by the linear pseudoinverse algorithm.

Fig. 4
Fig. 4

Zenithal spectral radiance curves calculated by the linear pseudoinverse algorithm (measured) and compared with the results using the radiative transfer code (calculated) for two selected cases: (a) Saharan dust event and (b) low aerosol load.

Fig. 5
Fig. 5

(a) Spectral radiance calculated by the iteration procedure, using the radiative transfer code, versus the spectral radiance reconstructed by the linear pseudoinverse spectral algorithm. (b) Histogram of the differences between the reconstructed and the calculated zenith spectral radiances. Both figures include all individual radiance values from 380 to 780 nm corresponding to the selected data sets.

Fig. 6
Fig. 6

Optical depth ( 550 nm ) time evolution (experimental values using the CIMEL sunphotometer and calculated values using the iterative algorithm): (a) 30 October 2006 and (b) 31 October 2006.

Fig. 7
Fig. 7

Histogram of the differences between experimental (sunphotometer CIMEL values) and calculated optical depth values for the complete data set.

Metrics