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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 44, Iss. 22 — Aug. 1, 2005
  • pp: 4775–4784

Simultaneous stratospheric gas and aerosol retrievals from broadband infrared occultation measurements

Sergey Oshchepkov, Yasuhiro Sasano, Tatsuya Yokota, Nobuyuki Uemura, Hisashi Matsuda, Yasuhiro Itou, and Hideaki Nakajima  »View Author Affiliations


Applied Optics, Vol. 44, Issue 22, pp. 4775-4784 (2005)
http://dx.doi.org/10.1364/AO.44.004775


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Abstract

The inversion method for simultaneous gas (O3, NO2, HNO3, N2O, CH4, H2O, CFC-11, CFC-12, N2O5, and ClONO2) and aerosol retrievals from broadband continuous IR spectra of occultation measurements is described. Both gas and aerosol physical modeling with consideration of the multicomponent character of aerosol and polar stratospheric clouds (PSCs) are used to minimize the difference between measured and modeled transmittance spectra under smoothness constraints imposed on particle-size distributions for each PSC component and positive constraints on all gas and aerosol parameters. The method is tested by numerical simulations in which synthetic occultation measurements inherent to the improved limb atmospheric spectrometer are used. The study reveals that the method has significant advantages over other approaches based on offset or gas–window–channel aerosol correction for accurate gas retrievals and provides additional information on the particle-size composition, volume density, and chemical component character of PSCs.

© 2005 Optical Society of America

OCIS Codes
(010.1280) Atmospheric and oceanic optics : Atmospheric composition
(280.0280) Remote sensing and sensors : Remote sensing and sensors
(280.1100) Remote sensing and sensors : Aerosol detection

History
Original Manuscript: June 23, 2004
Revised Manuscript: April 15, 2005
Manuscript Accepted: April 15, 2005
Published: August 1, 2005

Citation
Sergey Oshchepkov, Yasuhiro Sasano, Tatsuya Yokota, Nobuyuki Uemura, Hisashi Matsuda, Yasuhiro Itou, and Hideaki Nakajima, "Simultaneous stratospheric gas and aerosol retrievals from broadband infrared occultation measurements," Appl. Opt. 44, 4775-4784 (2005)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-44-22-4775

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