UMD AOSC Seminar

Daily Precipitation Statistics:
An Intercomparison between NCP Reanalyses and Observations

Drs. V. E. Kousky, R. W. Higgins and V. B. S. Silva

Climate Prediction Center
NOAA National Centers for Environmental Prediction

A comparison of the statistics of daily precipitation over the conterminous United States and South America is carried out using gridded station data, and three generations of reanalysis products in use at the National Centers for Environmental Prediction (NCEP). The reanalysis products are the NCEP/NCAR Reanalysis (Kalnay et al. 1996), the NCEP/DOE Reanalysis (Kanamitsu et al. 2002), and the NCEP Climate Forecast System (CFS) Reanalysis (Saha et al. 2010). Several simple measures are used to characterize relationships between the observations and the reanalysis products, including bias, precipitation probability, variance, and correlation.

It is shown that the CFS Reanalysis represents a clear improvement over the earlier reanalysis products, though significant biases remain. Comparisons of the error patterns in the reanalysis products provide a suitable basis for confident conversion of the Climate Prediction Center (CPC) operational monitoring and prediction products to the new generation of analyses based on CFS.

April 14, 2011, Thursday

Seminar: 3:30-4:30pm

Computer and Space Sciences (CSS) Building, Auditorium (Room 2400)
Refreshment is served at 3:00pm in the adjoining Atrium

[Contact: Professor James Carton]
[AOSC | Seminar | Directions | Parking]

AOSC 818. Frontiers in Atmosphere, Ocean, Climate, and Synoptic Meteorology Research