CPC Monthly Analysis of Global Land Precipitation, v1.0

Global Land Precipitation based on raingauge data - in 0.5x0.5 deg. boxes.

A data set of global monthly precipitation is being constructed on 0.5, 1.0 and 2.5 degrees latitude/longitude grid starting from 1948 till the present. Over global land areas, the gridded field of monthly precipitation is defined by interpolating gauge observations at over 15,000 stations collected from the version 2 data set of the Global Historical Climatology Network (GHCN) of NOAA/NCDC and the Climate Anomaly Monitoring System (CAMS) of NOAA/CPC using the optimum interpolation (OI) algorithm. Over global oceanic areas, the analysis is defined by projecting the historical observations (e.g. gauges, COADS present weather reports) onto EOF patterns determined from satellite-based precipitation estimates for a 20-year period from 1979 to 1998. As of August 2000, the construction of the oceanic monthly precipitation analysis is still in process.

The rainfall is given as monthly average rain rate per day. In addition, number of rain gauges within a lat./lon. box is provided.

Chen, M., P. Xie, J. E. Janowiak, and P. A. Arkin, 2002: Global Land Precipitation: A 50-yr Monthly Analysis Based on Gauge Observations, J. of Hydrometeorology, 3, 249-266

monthly mean rainfall amount (0.1 mm/day), number of gauges in grid box
ZonalGlobal by 0.5 deg
MeridionalGlobal by 0.5 deg
Temporal Jan 1948 to Aug 2018 by 1 month(s)
Volume 12MB per variable per year
Source http://www.cpc.ncep.noaa.gov/products/global_precip/html/wpage.50yrrec.html
Acquired Jan 1, 2005 (Updated Sep 2018)
APDRC contact