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Development and Validation of Water Vapor Tracers as Diagnostics for the Atmospheric Hydrologic CycleUnderstanding of the local and remote sources of water vapor can be a valuable diagnostic in understanding the regional atmospheric hydrologic cycle. In the present study, we have implemented passive tracers as prognostic variables to follow water vapor evaporated in predetermined regions until the water tracer precipitates. The formulation of the sources and sinks of tracer water is generally proportional to the prognostic water vapor variable. Because all water has been accounted for in tracers, the water vapor variable provides the validation of the tracer water and the formulation of the sources and sinks. The tracers have been implemented in a GEOS General Circulation Model (GCM) simulation consisting of several summer periods to determine the source regions of precipitation for the United States and India. The recycling of water and interannual variability of the sources of water will be examined. Potential uses in GCM sensitivity studies, predictability studies and data assimilation will be discussed.
Document ID
Document Type
Conference Paper
Bosilovich, Michael G.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Schubert, Siegfried D.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Einaudi, Franco
Date Acquired
August 20, 2013
Publication Date
November 1, 2000
Subject Category
Environment Pollution
Meeting Information
AMS Annual Meeting(Albuquerque, NM)
Distribution Limits
Work of the US Gov. Public Use Permitted.
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