1. Comparison of Precipitation Products for 2014 Ethiopian Growing Season pete@geog.ucsb.edu chg.geog.ucsb.edu Pete Peterson 1, Chris C Funk 2,1, Gregory J Husak 1, Diego H Pedreros 2, Martin Landsfeld 1, Shraddhanand Shukla 1 1 Geography, University of California, Santa Barbara, CA, United States. 2 US Geological Survey GPM Workshop, June 9 th -10 th, 2015 Hyattsville MD, USA 1)Funk, C.C., Peterson, P.J., Landsfeld, M.F., Pedreros, D.H., Verdin, J.P., Rowland, J.D., Romero, B.E., Husak, G.J., Michaelsen, J.C., and Verdin, A.P., 2014, A quasi-global precipitation time series for drought monitoring: U.S. Geological Survey Data Series 832, 4 p., http://dx.doi.org/10.3133/ds832.http://dx.doi.org/10.3133/ds832 2)Funk, C.C., Peterson, P.J., Landsfeld, M.F., Pedreros D.H., Shukla, S., Husak, G.J., Harrison, L., Rowland, J.D. and Verdin, J.P. 2015 (submitted), The Climate Hazards group Infrared Precipitation with Stations: A new environmental record for monitoring hydrologic extremes with an example application in Ethiopia 3)Funk, C.C., Verdin, A., Michaelsen, J.C., Peterson, P.J., and Husak, G.J., 2015, A global satellite assisted precipitation climatology. Earth Syst. Sci. Data Discuss., 8, 401–425, 2015. doi:10.5194/essdd-8-401-2015 6) Results 1) Total Rainfall April to September 2014 (Ethiopia Mean [mm]) 5) Rainfall anomaly April to September 2014 (Ethiopia Mean [mm]) 2) Comparison with Independent Station Data 3) Monthly Station Stats by Source 1) This comparison with independent data shows good performance for the new IMERG dataset in a particularly difficult region, Ethiopia, an important FEWS NET country. 2) The CHIRP 1,2 w/o any stations performed even better than IMERG. 3) The strong performance of the CHIRP is due to the CHPclim 3, a satellite enhanced global 0.05 degree climatology. This kind of enhancement could be incorporated into other products as well. 4) The CFS greatly overestimates precipitation in Western Ethiopia, we have seen this drift over time starting around 2003. IMERG 3B-MO.MS.MRG.3IMERG.*.V03D.HDF5 ARC2 African Rainfall Climatology from the Famine Early Warning System CHIRP Climate Hazards Group IR Precipitation CHIRPS Climate Hazards Group IR Precipitation w/ Stations versions 2.0 CFS NCEP Climate Forecast System (CFS) CPC-Unif CPC Gauge-Based Analysis of Global Daily Precipitation List of Precipitation Sources RFE2 Rainfall Estimator (RFE) for data over Africa. TAMSAT Tropical Applications of Meteorology using SATellite data and ground-based observations TRMM-RT7 Tropical Rainfall Measuring Mission (TRMM) Real-Time Precipitation (3B42-RT) TRMM-V7 Tropical Rainfall Measuring Mission (TRMM) Precipitation (3B42-V7A) GeoCLIM A spatial analysis tool designed for climatological analysis of historical rainfall and temperature. Total rainfall April-Sept 2014. Monthly CHIRPS fields enhanced using the independent stations provided by the Ethiopian National Meteorological Service. The enhancement process is done using CHG’s GeoCLIM, which blends station data with precipitation fields. 4) Enhanced Precipitation Acknowledgement : The Climate Hazards Group InfraRed Precipitation with Stations (CHIRPS) development process was carried out through U.S. Geological Survey (USGS) cooperative agreement #G09AC000001 "Monitoring and Forecasting Climate, Water and Land Use for Food Production in the Developing World" with funding from: U.S. Agency for International Development Office of Food for Peace, award #AID-FFP-P-10- 00002 for "Famine Early Warning Systems Network Support”, the National Aeronautics and Space Administration Applied Sciences Program, Decisions award #NN10AN26I for "A Land Data Assimilation System for Famine Early Warning”, SERVIR award #NNH12AU22I for "A Long Time-Series Indicator of Agricultural Drought for the Greater Horn of Africa”, The National Oceanic and Atmospheric Administration award NA11OAR4310151 for "A Global Standardized Precipitation Index supporting the US Drought Portal and the Famine Early Warning System Network”, and the USGS Land Change Science Program. Overview of CHIRP(S) Processing [mm]