|Coverage||Global (90N-90S, 0-360E)|
January 1979 - August 2002 (Version 9906)
August 2002 - Present (Version 0208)
|Resolution||2.5 x 2.5 degree, monthly|
Ground-based rainfall measurements from gauges/radars often provide higher spatial and temporal sampling as well as the most direct measure of rainfall over many regions. Often such data are used for purposes of calibration, however, over regions with sufficient coverage they can provide better large-scale climate estimates than any satellite remote sensing technique. For this reason, accumulations of global gridded rain gauge data have been incorporated into several of the merged products.
V9906: Available January 1979 - August 2002
V0208: Available August 2002 - Present
This dataset consists of rain gauge observations from the Climate Anomaly Monitoring System (CAMS) [Ropelewski et al., 1984]. It is incorporated into the CAMS-OPI merged dataset, developed for near real-time applications, and the GPCP merged dataset prior to 1986. A complete description of the CAMS-OPI merged dataset is provided by Janowiak and Xie .
This dataset is available through the CAMS-OPI web site at NOAA's Climate Prediction Center