Abstract

The role of aerosols in climate and climate change is one of the factors that is least understood at the present. Aerosols’ direct interaction with solar radiation is a well understood mechanism that affects Earth’s net radiative forcing. However, quantifying its magnitude is more problematic because of the temporal and spatial variability of aerosol particles. To enhance our understanding of the radiative effects of aerosols on the global climate, Singapore has joined the AERONET (Aerosol Robotic Network) worldwide network by contributing ground-based direct Sun measurements performed by means of a multiwavelength Sun-photometer instrument. Data are collected on an hourly basis, then are uploaded to be fully screened and quality assured by AERONET. We use a one year data record (level 1.5/2.0) of measured columnar atmospheric optical depth, spanning from November 2006 to October 2007, to study the monthly and seasonal variability of the aerosol optical depth and the Ångström exponent. We performed independent retrievals of these parameters (aerosol optical depth and Ångström exponent) by using the photometer’s six available bands covering the near-UV to near-IR (380–1080nm). As a validation, our independent retrievals were compared with AERONET 1.5/2.0 level direct Sun product.

© 2009 Optical Society of America

Full Article  |  PDF Article
Related Articles
Computationally efficient method for retrieving aerosol optical depth from ATSR-2 and AATSR data

William M. F. Grey, Peter R. J. North, and Sietse O. Los
Appl. Opt. 45(12) 2786-2795 (2006)

Particle backscatter, extinction, and lidar ratio profiling with Raman lidar in south and north China

Matthias Tesche, Albert Ansmann, Detlef Müller, Dietrich Althausen, Ronny Engelmann, Min Hu, and Yuanghang Zhang
Appl. Opt. 46(25) 6302-6308 (2007)

Remote sensing of aerosol plumes: a semianalytical model

Alexandre Alakian, Rodolphe Marion, and Xavier Briottet
Appl. Opt. 47(11) 1851-1866 (2008)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (8)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (6)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription