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| Titel |
Relating tropical ocean clouds to moist processes using water vapor isotope measurements |
| VerfasserIn |
J. Lee, J. Worden, D. Noone, K. Bowman, A. Eldering, A. LeGrande, J.-L. F. Li, G. Schmidt, H. Sodemann |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 11, no. 2 ; Nr. 11, no. 2 (2011-01-26), S.741-752 |
| Datensatznummer |
250009196
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| Publikation (Nr.) |
 copernicus.org/acp-11-741-2011.pdf |
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| Zusammenfassung |
| We examine the co-variations of tropospheric water vapor,
its isotopic composition and cloud types and relate these distributions to
tropospheric mixing and distillation models using satellite observations
from the Aura Tropospheric Emission Spectrometer (TES) over the summertime
tropical ocean. Interpretation of these process distributions must take into
account the sensitivity of the TES isotope and water vapor measurements to
variations in cloud, water, and temperature amount. Consequently,
comparisons are made between cloud-types based on the International
Satellite Cloud Climatology Project (ISSCP) classification; these are clear
sky, non-precipitating (e.g., cumulus), boundary layer (e.g.,
stratocumulus), and precipitating clouds (e.g. regions of deep convection).
In general, we find that the free tropospheric vapor over tropical oceans
does not strictly follow a Rayleigh model in which air parcels become dry
and isotopically depleted through condensation. Instead, mixing processes
related to convection as well as subsidence, and re-evaporation of rainfall
associated with organized deep convection all play significant roles in
controlling the water vapor distribution. The relative role of these
moisture processes are examined for different tropical oceanic regions. |
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