ATMOS stratospheric deuterated water and implications for troposphere‐stratosphere transport
Identifieur interne : 000698 ( Main/Exploration ); précédent : 000697; suivant : 000699ATMOS stratospheric deuterated water and implications for troposphere‐stratosphere transport
Auteurs : Elisabeth J. Moyer ; Fredrick W. Irion ; Yuk L. Yung ; Michael R. GunsonSource :
- Geophysical Research Letters [ 0094-8276 ] ; 1996-08-15.
Abstract
Measurements of the isotopic composition of stratospheric water by the ATMOS instrument are used to infer the convective history of stratospheric air. The average water vapor entering the stratosphere is found to be highly depleted of deuterium, with δDw of −670±80 (67% deuterium loss). Model calculations predict, however, that under conditions of thermodynamic equilibrium, dehydration to stratospheric mixing ratios should produce stronger depletion to δDw of −800 to −900 (80–90% deuterium loss). Deuterium enrichment of water vapor in ascending parcels can occur only in conditions of rapid convection; enrichments persisting into the stratosphere require that those conditions continue to near‐tropopause altitudes. We conclude that either the predominant source of water vapor to the uppermost troposphere is enriched convective water, most likely evaporated cloud ice, or troposphere‐stratosphere transport occurs closely associated with tropical deep convection.
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DOI: 10.1029/96GL01489
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Moyer</name><affiliation><wicri:noCountry code="subField">Caltech</wicri:noCountry></affiliation></author><author><name sortKey="Irion, Fredrick W" sort="Irion, Fredrick W" uniqKey="Irion F" first="Fredrick W." last="Irion">Fredrick W. Irion</name><affiliation><wicri:noCountry code="subField">Caltech</wicri:noCountry></affiliation></author><author><name sortKey="Yung, Yuk L" sort="Yung, Yuk L" uniqKey="Yung Y" first="Yuk L." last="Yung">Yuk L. Yung</name><affiliation><wicri:noCountry code="subField">Caltech</wicri:noCountry></affiliation></author><author><name sortKey="Gunson, Michael R" sort="Gunson, Michael R" uniqKey="Gunson M" first="Michael R." last="Gunson">Michael R. Gunson</name><affiliation><wicri:noCountry code="no comma">Jet Propulsion Laboratory</wicri:noCountry></affiliation></author></analytic><monogr></monogr><series><title level="j">Geophysical Research Letters</title><title level="j" type="abbrev">Geophys. Res. Lett.</title><idno type="ISSN">0094-8276</idno><idno type="eISSN">1944-8007</idno><imprint><publisher>Blackwell Publishing Ltd</publisher><date type="published" when="1996-08-15">1996-08-15</date><biblScope unit="volume">23</biblScope><biblScope unit="issue">17</biblScope><biblScope unit="page" from="2385">2385</biblScope><biblScope unit="page" to="2388">2388</biblScope></imprint><idno type="ISSN">0094-8276</idno></series><idno type="istex">361C204A6A2BF55FA3F386169252A5BA83C92BFD</idno><idno type="DOI">10.1029/96GL01489</idno><idno type="ArticleID">96GL01489</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0094-8276</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract">Measurements of the isotopic composition of stratospheric water by the ATMOS instrument are used to infer the convective history of stratospheric air. The average water vapor entering the stratosphere is found to be highly depleted of deuterium, with δDw of −670±80 (67% deuterium loss). Model calculations predict, however, that under conditions of thermodynamic equilibrium, dehydration to stratospheric mixing ratios should produce stronger depletion to δDw of −800 to −900 (80–90% deuterium loss). Deuterium enrichment of water vapor in ascending parcels can occur only in conditions of rapid convection; enrichments persisting into the stratosphere require that those conditions continue to near‐tropopause altitudes. We conclude that either the predominant source of water vapor to the uppermost troposphere is enriched convective water, most likely evaporated cloud ice, or troposphere‐stratosphere transport occurs closely associated with tropical deep convection.</div></front></TEI><affiliations><list></list><tree><noCountry><name sortKey="Gunson, Michael R" sort="Gunson, Michael R" uniqKey="Gunson M" first="Michael R." last="Gunson">Michael R. Gunson</name><name sortKey="Irion, Fredrick W" sort="Irion, Fredrick W" uniqKey="Irion F" first="Fredrick W." last="Irion">Fredrick W. Irion</name><name sortKey="Moyer, Elisabeth J" sort="Moyer, Elisabeth J" uniqKey="Moyer E" first="Elisabeth J." last="Moyer">Elisabeth J. Moyer</name><name sortKey="Yung, Yuk L" sort="Yung, Yuk L" uniqKey="Yung Y" first="Yuk L." last="Yung">Yuk L. Yung</name></noCountry></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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