Vertical profiles of aerosol volume from high-spectral-resolution infrared transmission measurements. I. Methodology

Annmarie Eldering; Fredrick W. Irion; Albert Y. Chang; Michael R. Gunson; Franklin P. Mills; Helen M. Steele

doi:10.1364/AO.40.003082

Vertical profiles of aerosol volume from high-spectral-resolution infrared transmission measurements. I. Methodology

Annmarie Eldering, Fredrick W. Irion, Albert Y. Chang, Michael R. Gunson, Franklin P. Mills, Helen M. Steele

Research output: Contribution to journal › Article › peer-review

17 Citations (Scopus)

Abstract

The wavelength-dependent aerosol extinction in the 800–1250-cm^-1 region has been derived from ATMOS (atmospheric trace molecule spectroscopy) high-spectral-resolution IR transmission measurements. Using models of aerosol and cloud extinction, we have performed weighted nonlinear leastsquares fitting to determine the aerosol-volume columns and vertical profiles of stratospheric sulfate aerosol and cirrus cloud volume. Modeled extinction by use of cold-temperature aerosol optical constants for a 70–80% sulfuric-acid–water solution shows good agreement with the measurements, and the derived aerosol volumes for a 1992 occultation are consistent with data from other experiments after the eruption of Mt. Pinatubo. The retrieved sulfuric acid aerosol-volume profiles are insensitive to the aerosol-size distribution and somewhat sensitive to the set of optical constants used. Data from the nonspherical cirrus extinction model agree well with a 1994 mid–latitude measurement indicating the presence of cirrus clouds at the tropopause.

Original language	English
Pages (from-to)	3082-3091
Number of pages	10
Journal	Applied Optics
Volume	40
Issue number	18
DOIs	https://doi.org/10.1364/AO.40.003082
Publication status	Published - 20 Jun 2001
Externally published	Yes

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title = "Vertical profiles of aerosol volume from high-spectral-resolution infrared transmission measurements. I. Methodology",

abstract = "The wavelength-dependent aerosol extinction in the 800–1250-cm-1 region has been derived from ATMOS (atmospheric trace molecule spectroscopy) high-spectral-resolution IR transmission measurements. Using models of aerosol and cloud extinction, we have performed weighted nonlinear leastsquares fitting to determine the aerosol-volume columns and vertical profiles of stratospheric sulfate aerosol and cirrus cloud volume. Modeled extinction by use of cold-temperature aerosol optical constants for a 70–80\% sulfuric-acid–water solution shows good agreement with the measurements, and the derived aerosol volumes for a 1992 occultation are consistent with data from other experiments after the eruption of Mt. Pinatubo. The retrieved sulfuric acid aerosol-volume profiles are insensitive to the aerosol-size distribution and somewhat sensitive to the set of optical constants used. Data from the nonspherical cirrus extinction model agree well with a 1994 mid–latitude measurement indicating the presence of cirrus clouds at the tropopause.",

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T1 - Vertical profiles of aerosol volume from high-spectral-resolution infrared transmission measurements. I. Methodology

AU - Eldering, Annmarie

AU - Irion, Fredrick W.

AU - Chang, Albert Y.

AU - Gunson, Michael R.

AU - Mills, Franklin P.

AU - Steele, Helen M.

PY - 2001/6/20

Y1 - 2001/6/20

N2 - The wavelength-dependent aerosol extinction in the 800–1250-cm-1 region has been derived from ATMOS (atmospheric trace molecule spectroscopy) high-spectral-resolution IR transmission measurements. Using models of aerosol and cloud extinction, we have performed weighted nonlinear leastsquares fitting to determine the aerosol-volume columns and vertical profiles of stratospheric sulfate aerosol and cirrus cloud volume. Modeled extinction by use of cold-temperature aerosol optical constants for a 70–80% sulfuric-acid–water solution shows good agreement with the measurements, and the derived aerosol volumes for a 1992 occultation are consistent with data from other experiments after the eruption of Mt. Pinatubo. The retrieved sulfuric acid aerosol-volume profiles are insensitive to the aerosol-size distribution and somewhat sensitive to the set of optical constants used. Data from the nonspherical cirrus extinction model agree well with a 1994 mid–latitude measurement indicating the presence of cirrus clouds at the tropopause.

AB - The wavelength-dependent aerosol extinction in the 800–1250-cm-1 region has been derived from ATMOS (atmospheric trace molecule spectroscopy) high-spectral-resolution IR transmission measurements. Using models of aerosol and cloud extinction, we have performed weighted nonlinear leastsquares fitting to determine the aerosol-volume columns and vertical profiles of stratospheric sulfate aerosol and cirrus cloud volume. Modeled extinction by use of cold-temperature aerosol optical constants for a 70–80% sulfuric-acid–water solution shows good agreement with the measurements, and the derived aerosol volumes for a 1992 occultation are consistent with data from other experiments after the eruption of Mt. Pinatubo. The retrieved sulfuric acid aerosol-volume profiles are insensitive to the aerosol-size distribution and somewhat sensitive to the set of optical constants used. Data from the nonspherical cirrus extinction model agree well with a 1994 mid–latitude measurement indicating the presence of cirrus clouds at the tropopause.

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DO - 10.1364/AO.40.003082

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JF - Applied Optics

IS - 18

ER -

Vertical profiles of aerosol volume from high-spectral-resolution infrared transmission measurements. I. Methodology

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