Cloud identification in atmospheric trace molecule spectroscopy infrared occultation measurements

Brian H. Kahn; Annmarie Eldering; Fredrick W. Irion; Franklin P. Mills; Bhaswar Sen; Michael R. Gunson

doi:10.1364/AO.41.002768

Cloud identification in atmospheric trace molecule spectroscopy infrared occultation measurements

Brian H. Kahn, Annmarie Eldering, Fredrick W. Irion, Franklin P. Mills, Bhaswar Sen, Michael R. Gunson

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

12 Citations (Scopus)

Abstract

High-resolution infrared nongas absorption spectra derived from the Atmospheric Trace Molecule Spectroscopy (ATMOS) experiment are analyzed for evidence of the presence of cirrus clouds. Several nonspherical ice extinction models based on realistic size distributions and crystal habits along with a stratospheric sulfate aerosol model are fit to the spectra, and comparisons are made with different model combinations. Nonspherical ice models often fit observed transmission spectra better than a spherical Mie ice model, and some discrimination among nonspherical models is noted. The ATMOS lines of sight for eight occultations are superimposed on coincident geostationary satellite infrared imagery, and brightness temperatures along the lines of sight are compared with retrieved vertical temperature profiles. With these comparisons, studies of two cases of clear sky, three cases of opaque cirrus, and three cases of patchy cirrus are discussed.

Original language	English
Pages (from-to)	2768-2780
Number of pages	13
Journal	Applied Optics
Volume	41
Issue number	15
DOIs	https://doi.org/10.1364/AO.41.002768
Publication status	Published - 20 May 2002
Externally published	Yes

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title = "Cloud identification in atmospheric trace molecule spectroscopy infrared occultation measurements",

abstract = "High-resolution infrared nongas absorption spectra derived from the Atmospheric Trace Molecule Spectroscopy (ATMOS) experiment are analyzed for evidence of the presence of cirrus clouds. Several nonspherical ice extinction models based on realistic size distributions and crystal habits along with a stratospheric sulfate aerosol model are fit to the spectra, and comparisons are made with different model combinations. Nonspherical ice models often fit observed transmission spectra better than a spherical Mie ice model, and some discrimination among nonspherical models is noted. The ATMOS lines of sight for eight occultations are superimposed on coincident geostationary satellite infrared imagery, and brightness temperatures along the lines of sight are compared with retrieved vertical temperature profiles. With these comparisons, studies of two cases of clear sky, three cases of opaque cirrus, and three cases of patchy cirrus are discussed.",

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T1 - Cloud identification in atmospheric trace molecule spectroscopy infrared occultation measurements

AU - Kahn, Brian H.

AU - Eldering, Annmarie

AU - Irion, Fredrick W.

AU - Mills, Franklin P.

AU - Sen, Bhaswar

AU - Gunson, Michael R.

PY - 2002/5/20

Y1 - 2002/5/20

N2 - High-resolution infrared nongas absorption spectra derived from the Atmospheric Trace Molecule Spectroscopy (ATMOS) experiment are analyzed for evidence of the presence of cirrus clouds. Several nonspherical ice extinction models based on realistic size distributions and crystal habits along with a stratospheric sulfate aerosol model are fit to the spectra, and comparisons are made with different model combinations. Nonspherical ice models often fit observed transmission spectra better than a spherical Mie ice model, and some discrimination among nonspherical models is noted. The ATMOS lines of sight for eight occultations are superimposed on coincident geostationary satellite infrared imagery, and brightness temperatures along the lines of sight are compared with retrieved vertical temperature profiles. With these comparisons, studies of two cases of clear sky, three cases of opaque cirrus, and three cases of patchy cirrus are discussed.

AB - High-resolution infrared nongas absorption spectra derived from the Atmospheric Trace Molecule Spectroscopy (ATMOS) experiment are analyzed for evidence of the presence of cirrus clouds. Several nonspherical ice extinction models based on realistic size distributions and crystal habits along with a stratospheric sulfate aerosol model are fit to the spectra, and comparisons are made with different model combinations. Nonspherical ice models often fit observed transmission spectra better than a spherical Mie ice model, and some discrimination among nonspherical models is noted. The ATMOS lines of sight for eight occultations are superimposed on coincident geostationary satellite infrared imagery, and brightness temperatures along the lines of sight are compared with retrieved vertical temperature profiles. With these comparisons, studies of two cases of clear sky, three cases of opaque cirrus, and three cases of patchy cirrus are discussed.

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U2 - 10.1364/AO.41.002768

DO - 10.1364/AO.41.002768

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JO - Applied Optics

JF - Applied Optics

IS - 15

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Cloud identification in atmospheric trace molecule spectroscopy infrared occultation measurements

Abstract

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