Observations of a distinctive infra-red spectral feature in the atmospheric spectra of polar stratospheric clouds measured by the CRISTA instrument
[1] Polar stratospheric cloud particles (PSCs) are known to strongly influence the infra-red emission spectrum of the lower stratosphere in cold polar winters. The characteristics of these infra-red features have been examined using limb sounding spectra recorded by the CRISTA experiment in August 1...
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American Geophysical Union
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ftfzjuelichnvdb:oai:juser.fz-juelich.de:32642 2023-05-15T14:03:22+02:00 Observations of a distinctive infra-red spectral feature in the atmospheric spectra of polar stratospheric clouds measured by the CRISTA instrument Spang, R. Remedios, J. J. DE 2003 https://juser.fz-juelich.de/record/32642 https://juser.fz-juelich.de/search?p=id:%22PreJuSER-32642%22 eng eng American Geophysical Union info:eu-repo/semantics/altIdentifier/hdl/2128/20825 info:eu-repo/semantics/altIdentifier/issn/0094-8276 info:eu-repo/semantics/altIdentifier/wos/WOS:000185250700002 info:eu-repo/semantics/altIdentifier/doi/10.1029/2003GL017231 https://juser.fz-juelich.de/record/32642 https://juser.fz-juelich.de/search?p=id:%22PreJuSER-32642%22 info:eu-repo/semantics/openAccess Geophysical research letters 30, 1875 (2003). doi:10.1029/2003GL017231 info:eu-repo/classification/ddc/550 J info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2003 ftfzjuelichnvdb https://doi.org/10.1029/2003GL017231 2022-07-14T10:48:11Z [1] Polar stratospheric cloud particles (PSCs) are known to strongly influence the infra-red emission spectrum of the lower stratosphere in cold polar winters. The characteristics of these infra-red features have been examined using limb sounding spectra recorded by the CRISTA experiment in August 1997 when many Antarctic PSCs were observed. A distinctive spectral feature centered at 820 cm(-1) has been identified in many of these spectra, the first time that a particular band has been observed in the spectra of PSCs in the atmosphere. The feature can be attributed to the nu(2) band of the NO3- ion and strongly suggests a condensed nitric acid component to the particles in the form of solid nitric acid trihydrate (NAT) or liquid ternary solution (STS). The spectral signatures belong to a definite sub-set of the PSC observations recorded by CRISTA. The particles are observed at temperatures well above 192 K, allowing for temperature errors, and it is suggested that NAT particles are the most likely source of the spectral signature. In addition, it is shown that PSC events in which no spectral signature is present are only observed below 192 K and display a very similar HNO3- temperature relationship to STS particles. Article in Journal/Newspaper Antarc* Antarctic Forschungszentrum Jülich: JuSER (Juelich Shared Electronic Resources) Antarctic Geophysical Research Letters 30 16 |
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Forschungszentrum Jülich: JuSER (Juelich Shared Electronic Resources) |
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ftfzjuelichnvdb |
language |
English |
topic |
info:eu-repo/classification/ddc/550 J |
spellingShingle |
info:eu-repo/classification/ddc/550 J Spang, R. Remedios, J. J. Observations of a distinctive infra-red spectral feature in the atmospheric spectra of polar stratospheric clouds measured by the CRISTA instrument |
topic_facet |
info:eu-repo/classification/ddc/550 J |
description |
[1] Polar stratospheric cloud particles (PSCs) are known to strongly influence the infra-red emission spectrum of the lower stratosphere in cold polar winters. The characteristics of these infra-red features have been examined using limb sounding spectra recorded by the CRISTA experiment in August 1997 when many Antarctic PSCs were observed. A distinctive spectral feature centered at 820 cm(-1) has been identified in many of these spectra, the first time that a particular band has been observed in the spectra of PSCs in the atmosphere. The feature can be attributed to the nu(2) band of the NO3- ion and strongly suggests a condensed nitric acid component to the particles in the form of solid nitric acid trihydrate (NAT) or liquid ternary solution (STS). The spectral signatures belong to a definite sub-set of the PSC observations recorded by CRISTA. The particles are observed at temperatures well above 192 K, allowing for temperature errors, and it is suggested that NAT particles are the most likely source of the spectral signature. In addition, it is shown that PSC events in which no spectral signature is present are only observed below 192 K and display a very similar HNO3- temperature relationship to STS particles. |
format |
Article in Journal/Newspaper |
author |
Spang, R. Remedios, J. J. |
author_facet |
Spang, R. Remedios, J. J. |
author_sort |
Spang, R. |
title |
Observations of a distinctive infra-red spectral feature in the atmospheric spectra of polar stratospheric clouds measured by the CRISTA instrument |
title_short |
Observations of a distinctive infra-red spectral feature in the atmospheric spectra of polar stratospheric clouds measured by the CRISTA instrument |
title_full |
Observations of a distinctive infra-red spectral feature in the atmospheric spectra of polar stratospheric clouds measured by the CRISTA instrument |
title_fullStr |
Observations of a distinctive infra-red spectral feature in the atmospheric spectra of polar stratospheric clouds measured by the CRISTA instrument |
title_full_unstemmed |
Observations of a distinctive infra-red spectral feature in the atmospheric spectra of polar stratospheric clouds measured by the CRISTA instrument |
title_sort |
observations of a distinctive infra-red spectral feature in the atmospheric spectra of polar stratospheric clouds measured by the crista instrument |
publisher |
American Geophysical Union |
publishDate |
2003 |
url |
https://juser.fz-juelich.de/record/32642 https://juser.fz-juelich.de/search?p=id:%22PreJuSER-32642%22 |
op_coverage |
DE |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Geophysical research letters 30, 1875 (2003). doi:10.1029/2003GL017231 |
op_relation |
info:eu-repo/semantics/altIdentifier/hdl/2128/20825 info:eu-repo/semantics/altIdentifier/issn/0094-8276 info:eu-repo/semantics/altIdentifier/wos/WOS:000185250700002 info:eu-repo/semantics/altIdentifier/doi/10.1029/2003GL017231 https://juser.fz-juelich.de/record/32642 https://juser.fz-juelich.de/search?p=id:%22PreJuSER-32642%22 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2003GL017231 |
container_title |
Geophysical Research Letters |
container_volume |
30 |
container_issue |
16 |
_version_ |
1766274016825311232 |