Dear Colleagues, This is to announce the release of our updated data set of global monthly precipitation which we call monthly CMAP (CPC Merged Analysis of Precipitation). The current version of the data set covers a 54-year-9-month period from Jan. 1979 to Sep. 2024. For the period from Jan.1979 to Dec.2008, the analysis is the same as in the previous version (v1501). !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Precipitation analysis was messed up in the previous version from Jan.2009 to Nov.2014 due to a mistake in a program to copy the data from working files to the final analysis. We have corrected problem in this Version. !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!! NOTICE !!!!!!!!!!!!!!!!!!!!!!!!!!!! Due to changes in the input data sets, discontinuities may observe in the analysis between periods before and after 2009. While we are working on the issues, users should be cautious in applications where high quantitative accuracy is required. !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! You may get the compressed ASCII data files along with a document file through ftp: ftp ftpprd.ncep.noaa.gov name: anonymous passwd: (your e-mail address) cd /pub/precip/cmap/monthly get cmap_mon_v2410_yy.txt.gz (data file for 19yy, or 20yy) get cmap_mon_v2410.doc (document) Please check the above mentioned ftp site for updates and extensions of the data set. Please contact us if you have any problems or questions concerning the merged analysis data. Please be advised that the CMAP data set may contain an artificial downward trend for period after 1996. Cares must be taken when using the data set for accurate quantitative applications. Thanks for your interest! Pingping Xie