Abstract

We have measured the near-normal-incidence infrared spectral reflectance of aqueous solutions of sulfuric acid having H<sub>2</sub>SO<sub>4</sub> concentrations of 75% and 95.6% by weight and have employed Kramers-Kronig analyses to obtain values of the optical constants <i>n(v)</i> and <i>k(v)</i> in the spectral range 400–6000 cm<sup>-1</sup>. The optical constants of these solutions at 250 and 300 K are compared. In spectral regions remote from strong absorption bands the values of the refractive indices n(v) obtained at 250 <i>K agree with the values given by Lorentz-Lorenz correction of the indices n(v)</i> obtained at 300 K. All absorption bands observed at 300 K are also present at 250 K with slight shifts in frequency and significant differences in <i>k(v)</i> at the band maxima. The present results give further support to the view that the clouds of Venus are composed of droplets of aqueous solutions of sulfuric acid with concentrations of approximately 75% H<sub>2</sub>SO<sub>4</sub> by weight.

© 1976 Optical Society of America

PDF Article

References

  • View by:
  • |
  • |

  1. A. T. Young, Icarus 18, 564 (1973).
  2. G. T. Sill, Comm. Lunar Planet. Lab. 9, 191 (1972).
  3. J. E. Hansen and J. W. Hovenier, J. Atmos. Sci. 31, 1137 (1974).
  4. K. F. Palmer and D. Williams, Appl. Opt. 14, 208 (1975).
  5. L. D. G. Young, Icarus 17, 632 (1972).
  6. A. T. Young, Science 183, 407 (1974).
  7. F. E. Remsberg, J. Geophys. Res. 78, 1401 (1973).
  8. J. B. Pollack, E. F. Erickson, D. Goorvitch, B. J. Baldwin, D. W. Strecker, F. C. Witteborn, and G. C. Augason, J. Atmos. Sci. 32, 1140 (1975).
  9. The "melting-point curve" for H2SO4-H2O mixtures is given in Fig. 14 of Ref. 4.
  10. A. N. Rusk, D. Williams, and M. R. Querry, J. Opt. Soc. Am. 59, 1299 (1971); C. W. Robertson, B. Curnutte, and D. Williams, Mol. Phys. 26, 183 (1973).
  11. A limited number of copies of tables listing numerical values of n(v) and k(v) for 75% and 95.6% H2SO4 solutions at 250 K can be obtained from the authors. Tables listing these quantities at 300 K are given in Ref. 4.
  12. P. A. Giguère and R. Savoie, Can. J. Phys. 38, 2467 (1960); D. E. Irish and H. Chen, J. Phys. Chem. 74, 3796 (1970); 75, 2673 (1971); 75, 2681 (1971).
  13. A. A. Lacis, J. Atmos. Sci. 32, 1107 (1975).
  14. R. E. Samuelson, R. Hanel, L. W. Herath, V. G. Kunde, and W. C. Maguire, Icarus 25, 49 (1975).

Augason, G. C.

J. B. Pollack, E. F. Erickson, D. Goorvitch, B. J. Baldwin, D. W. Strecker, F. C. Witteborn, and G. C. Augason, J. Atmos. Sci. 32, 1140 (1975).

Baldwin, B. J.

J. B. Pollack, E. F. Erickson, D. Goorvitch, B. J. Baldwin, D. W. Strecker, F. C. Witteborn, and G. C. Augason, J. Atmos. Sci. 32, 1140 (1975).

Erickson, E. F.

J. B. Pollack, E. F. Erickson, D. Goorvitch, B. J. Baldwin, D. W. Strecker, F. C. Witteborn, and G. C. Augason, J. Atmos. Sci. 32, 1140 (1975).

Giguère, P. A.

P. A. Giguère and R. Savoie, Can. J. Phys. 38, 2467 (1960); D. E. Irish and H. Chen, J. Phys. Chem. 74, 3796 (1970); 75, 2673 (1971); 75, 2681 (1971).

Goorvitch, D.

J. B. Pollack, E. F. Erickson, D. Goorvitch, B. J. Baldwin, D. W. Strecker, F. C. Witteborn, and G. C. Augason, J. Atmos. Sci. 32, 1140 (1975).

Hanel, R.

R. E. Samuelson, R. Hanel, L. W. Herath, V. G. Kunde, and W. C. Maguire, Icarus 25, 49 (1975).

Hansen, J. E.

J. E. Hansen and J. W. Hovenier, J. Atmos. Sci. 31, 1137 (1974).

Herath, L. W.

R. E. Samuelson, R. Hanel, L. W. Herath, V. G. Kunde, and W. C. Maguire, Icarus 25, 49 (1975).

Hovenier, J. W.

J. E. Hansen and J. W. Hovenier, J. Atmos. Sci. 31, 1137 (1974).

Kunde, V. G.

R. E. Samuelson, R. Hanel, L. W. Herath, V. G. Kunde, and W. C. Maguire, Icarus 25, 49 (1975).

Lacis, A. A.

A. A. Lacis, J. Atmos. Sci. 32, 1107 (1975).

Maguire, W. C.

R. E. Samuelson, R. Hanel, L. W. Herath, V. G. Kunde, and W. C. Maguire, Icarus 25, 49 (1975).

Palmer, K. F.

K. F. Palmer and D. Williams, Appl. Opt. 14, 208 (1975).

Pollack, J. B.

J. B. Pollack, E. F. Erickson, D. Goorvitch, B. J. Baldwin, D. W. Strecker, F. C. Witteborn, and G. C. Augason, J. Atmos. Sci. 32, 1140 (1975).

Querry, M. R.

A. N. Rusk, D. Williams, and M. R. Querry, J. Opt. Soc. Am. 59, 1299 (1971); C. W. Robertson, B. Curnutte, and D. Williams, Mol. Phys. 26, 183 (1973).

Remsberg, F. E.

F. E. Remsberg, J. Geophys. Res. 78, 1401 (1973).

Rusk, A. N.

A. N. Rusk, D. Williams, and M. R. Querry, J. Opt. Soc. Am. 59, 1299 (1971); C. W. Robertson, B. Curnutte, and D. Williams, Mol. Phys. 26, 183 (1973).

Samuelson, R. E.

R. E. Samuelson, R. Hanel, L. W. Herath, V. G. Kunde, and W. C. Maguire, Icarus 25, 49 (1975).

Savoie, R.

P. A. Giguère and R. Savoie, Can. J. Phys. 38, 2467 (1960); D. E. Irish and H. Chen, J. Phys. Chem. 74, 3796 (1970); 75, 2673 (1971); 75, 2681 (1971).

Sill, G. T.

G. T. Sill, Comm. Lunar Planet. Lab. 9, 191 (1972).

Strecker, D. W.

J. B. Pollack, E. F. Erickson, D. Goorvitch, B. J. Baldwin, D. W. Strecker, F. C. Witteborn, and G. C. Augason, J. Atmos. Sci. 32, 1140 (1975).

Williams, D.

A. N. Rusk, D. Williams, and M. R. Querry, J. Opt. Soc. Am. 59, 1299 (1971); C. W. Robertson, B. Curnutte, and D. Williams, Mol. Phys. 26, 183 (1973).

K. F. Palmer and D. Williams, Appl. Opt. 14, 208 (1975).

Witteborn, F. C.

J. B. Pollack, E. F. Erickson, D. Goorvitch, B. J. Baldwin, D. W. Strecker, F. C. Witteborn, and G. C. Augason, J. Atmos. Sci. 32, 1140 (1975).

Young, A. T.

A. T. Young, Science 183, 407 (1974).

A. T. Young, Icarus 18, 564 (1973).

Young, L. D. G.

L. D. G. Young, Icarus 17, 632 (1972).

Other

A. T. Young, Icarus 18, 564 (1973).

G. T. Sill, Comm. Lunar Planet. Lab. 9, 191 (1972).

J. E. Hansen and J. W. Hovenier, J. Atmos. Sci. 31, 1137 (1974).

K. F. Palmer and D. Williams, Appl. Opt. 14, 208 (1975).

L. D. G. Young, Icarus 17, 632 (1972).

A. T. Young, Science 183, 407 (1974).

F. E. Remsberg, J. Geophys. Res. 78, 1401 (1973).

J. B. Pollack, E. F. Erickson, D. Goorvitch, B. J. Baldwin, D. W. Strecker, F. C. Witteborn, and G. C. Augason, J. Atmos. Sci. 32, 1140 (1975).

The "melting-point curve" for H2SO4-H2O mixtures is given in Fig. 14 of Ref. 4.

A. N. Rusk, D. Williams, and M. R. Querry, J. Opt. Soc. Am. 59, 1299 (1971); C. W. Robertson, B. Curnutte, and D. Williams, Mol. Phys. 26, 183 (1973).

A limited number of copies of tables listing numerical values of n(v) and k(v) for 75% and 95.6% H2SO4 solutions at 250 K can be obtained from the authors. Tables listing these quantities at 300 K are given in Ref. 4.

P. A. Giguère and R. Savoie, Can. J. Phys. 38, 2467 (1960); D. E. Irish and H. Chen, J. Phys. Chem. 74, 3796 (1970); 75, 2673 (1971); 75, 2681 (1971).

A. A. Lacis, J. Atmos. Sci. 32, 1107 (1975).

R. E. Samuelson, R. Hanel, L. W. Herath, V. G. Kunde, and W. C. Maguire, Icarus 25, 49 (1975).

Cited By

OSA participates in CrossRef's Cited-By Linking service. Citing articles from OSA journals and other participating publishers are listed here.

Alert me when this article is cited.