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Record Details

Record 20 of 1861
The Impact of Soil Moisture Initialization On Seasonal Precipitation Forecasts
Author and Affiliation:
Koster, R. D.(NASA Goddard Space Flight Center, Greenbelt, MD United States)
Suarez, M. J.(NASA Goddard Space Flight Center, Greenbelt, MD United States)
Tyahla, L.(NASA Goddard Space Flight Center, Greenbelt, MD United States)
Houser, Paul [Technical Monitor]
Abstract: Some studies suggest that the proper initialization of soil moisture in a forecasting model may contribute significantly to the accurate prediction of seasonal precipitation, especially over mid-latitude continents. In order for the initialization to have any impact at all, however, two conditions must be satisfied: (1) the initial soil moisture anomaly must be "remembered" into the forecasted season, and (2) the atmosphere must respond in a predictable way to the soil moisture anomaly. In our previous studies, we identified the key land surface and atmospheric properties needed to satisfy each condition. Here, we tie these studies together with an analysis of an ensemble of seasonal forecasts. Initial soil moisture conditions for the forecasts are established by forcing the land surface model with realistic precipitation prior to the start of the forecast period. As expected, the impacts on forecasted precipitation (relative to an ensemble of runs that do not utilize soil moisture information) tend to be localized over the small fraction of the earth with all of the required land and atmosphere properties.
Publication Date: Jan 01, 2002
Document ID:
20020054243
(Acquired Jul 12, 2002)
Subject Category: METEOROLOGY AND CLIMATOLOGY
Document Type: Preprint
Meeting Information: American Meterological Society Meeting; 13-17 Jan. 2002; Orlando, FL; United States
Meeting Sponsor: American Meteorological Society; Washington, DC United States
Financial Sponsor: NASA Goddard Space Flight Center; Greenbelt, MD United States
Organization Source: NASA Goddard Space Flight Center; Greenbelt, MD United States
Description: 1p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: SOIL MOISTURE; SURFACE PROPERTIES; FORECASTING; EARTH SURFACE; TEMPERATE REGIONS; CONTINENTS
Availability Source: Other Sources
Availability Notes: Abstract Only
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