Home

Comparison of global gridded precipitation products over a mountainous region of Africa

Tufa Dinku; Stephen J. Connor; Pietro N. Ceccato; Chester F. Ropelewski

Title:
Comparison of global gridded precipitation products over a mountainous region of Africa
Author(s):
Dinku, Tufa
Connor, Stephen J.
Ceccato, Pietro N.
Ropelewski, Chester F.
Date:
Type:
Articles
Department:
International Research Institute for Climate and Society
Volume:
28
Permanent URL:
Book/Journal Title:
International Journal of Climatology
Abstract:
Five gridded monthly precipitation products are evaluated using a gauge network over complex topography in Africa. The global gridded products considered are produced by the Global Precipitation Climatology Center (GPCC), NOAA Climate Prediction Center (NOAA-CPC), and the Climate Research Unit at the University of East Anglia (UEA-CRU). Three different products from GPCC are available at multiple spatial resolutions: 0.5, 1 and 2.5° ; the NOAA-CPC product has a spatial resolution of 2.5° while that of UEA-CRU is 0.5° . Comparisons of the GPCC and UEA-CRU products are carried out at spatial resolutions of 0.5, 1 and 2.5° , while NOAA-CPC is compared with the other products only at 2.5° resolution. There is very strong agreement between the gridded global products and the reference raingauge data. Average correlation coefficients are about 0.95, 0.92, and 0.90 at 2.5, 1.0 and 0.5° spatial resolutions, respectively. Both systematic and random errors are reasonably low. The performance of these products is highest during the wettest season (Jun-Aug), and relatively poor during the dry season (Dec-Feb). The seasonal differences are more prominent at high resolution. These results are very encouraging, particularly, when considering the complex terrain of the validation site.
Subject(s):
Atmospheric sciences
Environmental studies
Publisher DOI:
http://dx.doi.org/10.1002/joc.1669
Item views:
188
Metadata:
View

In Partnership with the Center for Digital Research and Scholarship at Columbia University Libraries/Information Services.