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Numerical Simulation of the Water Cycle Change Over the 20th CenturyWe have used numerical models to test the impact of the change in Sea Surface Temperatures (SSTs) and carbon dioxide (CO2) concentration on the global circulation, particularly focusing on the hydrologic cycle, namely the global cycling of water and continental recycling of water. We have run four numerical simulations using mean annual SST from the early part of the 20th century (1900-1920) and the later part (1980-2000). In addition, we vary the CO2 concentrations for these periods as well. The duration of the simulations is 15 years, and the spatial resolution is 2 degrees. We use passive tracers to study the geographical sources of water. Surface evaporation from predetermined continental and oceanic regions provides the source of water for each passive tracer. In this way, we compute the percent of precipitation of each region over the globe. This can also be used to estimate precipitation recycling. In addition, we are using the passive tracers to independently compute the global cycling of water (compared to the traditional, Q/P calculation).
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)
Date Acquired
August 21, 2013
Publication Date
January 1, 2003
Subject Category
Meteorology And Climatology
Meeting Information
Meeting: Tenth US-Japan Workshop on Global Change
Location: Irvine, CA
Country: United States
Start Date: January 15, 2003
End Date: January 16, 2003
Distribution Limits
Work of the US Gov. Public Use Permitted.

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