Physics
Scientific paper
Apr 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29h..24s&link_type=abstract
Geophysical Research Letters, Volume 29, Issue 8, pp. 24-1, CiteID 1183, DOI 10.1029/2001GL013343
Physics
13
Hydrology: Soil Moisture, Hydrology: Drought, Hydrology: Instruments And Techniques, Meteorology And Atmospheric Dynamics: Land/Atmosphere Interactions
Scientific paper
Soil moisture availability has a significant impact on environmental processes of different scales. Errors in initializing soil moisture in numerical weather forecasting models tend to cause errors in short-term weather and medium range predictions. We study the use of two drought indices: Palmer Drought Severity Index (PDSI) values and Standardized Precipitation Index (SPI) for estimating soil moisture. SPI and PDSI values are compared for three climate divisions: western mountains, central piedmont, and the coastal plain in North Carolina, USA. Results suggest SPI to be more representative of short-term precipitation and soil moisture variation and hence a better indicator of soil wetness. A regression equation that uses SPI is proposed to estimate soil moisture.
Niyogi Dev dutta S.
Raman Sethu
Sims Aaron P.
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