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The South American Land Data Assimilation System (SALDAS) 5-Year Retrospective Atmospheric Forcing DatasetsThe definition and derivation of a 5-year, 0.125deg, 3-hourly atmospheric forcing dataset for the South America continent is described which is appropriate for use in a Land Data Assimilation System and which, because of the limited surface observational networks available in this region, uses remotely sensed data merged with surface observations as the basis for the precipitation and downward shortwave radiation fields. The quality of this data set is evaluated against available surface observations. There are regional difference in the biases for all variables in the dataset, with biases in precipitation of the order 0-1 mm/day and RMSE of 5-15 mm/day, biases in surface solar radiation of the order 10 W/sq m and RMSE of 20 W/sq m, positive biases in temperature typically between 0 and 4 K, depending on region, and positive biases in specific humidity around 2-3 g/Kg in tropical regions and negative biases around 1-2 g/Kg further south.
Document ID
20080038649
Acquisition Source
Goddard Space Flight Center
Document Type
Preprint (Draft being sent to journal)
Authors
deGoncalves, Luis Gustavo G. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Shuttleworth, William J. (Arizona Univ. Tucson, AZ, United States)
Vila, Daniel (Maryland Univ. College Park, MD, United States)
Larroza, Elaine (Instituto Nacional de Pesquisas Espacias Sao Paulo, Brazil)
Bottino, Marcus J. (Instituto Nacional de Pesquisas Espacias Sao Paulo, Brazil)
Herdies, Dirceu L. (Instituto Nacional de Pesquisas Espacias Sao Paulo, Brazil)
Aravequia, Jose A. (Instituto Nacional de Pesquisas Espacias Sao Paulo, Brazil)
De Mattos, Joao G. Z. (Instituto Nacional de Pesquisas Espacias Sao Paulo, Brazil)
Toll, David L. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Rodell, Matthew (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Houser, Paul (Institute of Global Environment and Society, Inc. Calverton, MD, United States)
Date Acquired
August 24, 2013
Publication Date
January 1, 2008
Subject Category
Meteorology And Climatology
Funding Number(s)
CONTRACT_GRANT: NNX06AG91G
Distribution Limits
Public
Copyright
Public Use Permitted.

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