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Hydration, dehydration, and the total hydrogen budget of the 1999/2000 winter Arctic stratosphere

Herman, R. L. ; Drdla, K. ; Spackman, J. R. ; Hurst, D. F. ; Popp, P. J. ; Webster, C. R. ; Romashkin, P. A. ; Elkins, J. W. ; Weinstock, E. M. ; Gandrud, B. W. ; Toon, G. C. ; Schoeberl, M. R. ; Jost, H. ; Atlas, E. L. ; Bui, T. P.

Journal of Geophysical Research - Atmospheres, 2002-03, Vol.107 (D5), p.SOL 63-1-SOL 63-12 [Periódico revisado por pares]

Washington, DC: American Geophysical Union

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Título:
Hydration, dehydration, and the total hydrogen budget of the 1999/2000 winter Arctic stratosphere
Autor: Herman, R. L. ; Drdla, K. ; Spackman, J. R. ; Hurst, D. F. ; Popp, P. J. ; Webster, C. R. ; Romashkin, P. A. ; Elkins, J. W. ; Weinstock, E. M. ; Gandrud, B. W. ; Toon, G. C. ; Schoeberl, M. R. ; Jost, H. ; Atlas, E. L. ; Bui, T. P.
Assuntos: Aerosols and particles ; Arctic ; Atmospheric Composition and Structure ; Atmospheric composition. Chemical and photochemical reactions ; Cloud physics and chemistry ; Constituent sources and sinks ; dehydration ; Earth, ocean, space ; Exact sciences and technology ; External geophysics ; hydration ; Middle atmosphere—constituent transport and chemistry ; Physics of the high neutral atmosphere ; SOLVE ; stratosphere ; water
É parte de: Journal of Geophysical Research - Atmospheres, 2002-03, Vol.107 (D5), p.SOL 63-1-SOL 63-12
Notas: istex:EE49D65D02BCEEFE864A48BB2D83AA28357A15D8
ArticleID:2001JD001257
ark:/67375/WNG-J38J2RZQ-H
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
Descrição: Stratospheric H2O, CH4, and H2 measured during the 1999/2000 Arctic winter are used to examine the total hydrogen budget and to quantify hydration and dehydration within the Arctic polar vortex. The mean volume mixing ratio of equivalent water, H2Oeq = H2O + 2*CH4, was found to be 7.38 ± 0.11 ppmv in the vortex and 7.35 ± 0.10 ppmv in the extravortex and vortex edge regions, implying insignificant net loss of H2O from the 50–90 hPa layer of the Arctic stratosphere. However, isolated occurrences of hydration and dehydration were observed on several flights. In particular, an average dehydration of 0.31 ppmv was encountered for 440 km along the NASA ER‐2 aircraft flight path on 27 January 2000 (0.63 ppmv maximum dehydration). Diabatic back‐trajectory calculations indicate that this dehydrated air parcel may have encountered temperatures below the ice frost point two weeks earlier. In addition to these isolated events, measurements of equivalent water indicated a decrease with altitude throughout the lower stratospheric vortex and vortex edge. Potential causes of this altitude dependence are quantified.
Editor: Washington, DC: American Geophysical Union
Idioma: Inglês

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Hydration, dehydration, and the total hydrogen budget of the 1999/2000 winter Arctic stratosphere

Herman, R. L. ; Drdla, K. ; Spackman, J. R. ; Hurst, D. F. ; Popp, P. J. ; Webster, C. R. ; Romashkin, P. A. ; Elkins, J. W. ; Weinstock, E. M. ; Gandrud, B. W. ; Toon, G. C. ; Schoeberl, M. R. ; Jost, H. ; Atlas, E. L. ; Bui, T. P.

Washington, DC: American Geophysical Union

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