Pp. Xie et al., GAUGE-BASED MONTHLY ANALYSIS OF GLOBAL LAND PRECIPITATION FROM 1971 TO 1994, JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 101(D14), 1996, pp. 19023-19034
Monthly gridded fields of global land precipitation have been construc
ted on 2.5 degrees latitude/longitude grids for a 24-year period from
1971 to 1994 by interpolating gauge observations at over 6000 stations
contained in the Global Historical Climatology Network of the Carbon
Dioxide Information Center of U.S. Department of Energy and the Climat
e Anomaly Monitoring System of the Climate Prediction Center of Nation
al Oceanic and Atmospheric Administration. Sensitivity tests indicated
that this gauge-based analysis has relatively high quality in general
and that its quantitative accuracy increases with the gauge network d
ensity. Significant value-dependent bias and random error, however, ex
ist in the analysis over grid areas with few gauges. The mean distribu
tion and annual cycle of the 24-year gauge-based analysis showed close
agreement with those of several published long-term means, and the in
ter-annual variations in precipitation associated with the El Nino-Sou
thern Oscillation phenomenon were evident. Despite the ability of this
gauge-based analysis to describe large-scale precipitation over globa
l land areas, further efforts are needed to improve the interpolation
algorithm, to increase gauge network density, and to combine the gauge
analysis with other information sources based on satellite observatio
ns, especially over grid areas with poor gauge coverage.