International Research Institute for Climate and Society Validation of Satellite Rainfall Products over South America over South America Tufa Dinku 1 and.

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Presentation transcript:

International Research Institute for Climate and Society Validation of Satellite Rainfall Products over South America over South America Tufa Dinku 1 and Franklyn Ruiz International Research Institute for Climate and Society (IRI) The Earth Institute at Columbia University 2. IDEAM, Bogotá, Colombia. International Research Institute for Climate and Society (IRI) The Earth Institute at Columbia University

International Research Institute for Climate and SocietyOutline MotivationMotivation Validation region and dataValidation region and data Validation of monthly productsValidation of monthly products Validations of daily productsValidations of daily products SummarySummary

International Research Institute for Climate and Society Over 300 datasets providing a thorough image of Earth’s past, present, and near-future climate Air-Sea Interface Topographic and Land Characteristics Atmosphere Oceanography Radiation Budget Seasonal Forecasts Atmospheric Indices Historical Model Simulations Hydrology Motivation: The IRI Data Library

International Research Institute for Climate and Society Motivation: Data Library The data sets in the Data Library includes many operation/semi- operational satellite rainfall productsThe data sets in the Data Library includes many operation/semi- operational satellite rainfall products Allows users to extract data for specific time/space domain and download it in different formatsAllows users to extract data for specific time/space domain and download it in different formats Enables some basic statistical manipulations and downloading the results Enables some basic statistical manipulations and downloading the results IRI uses these products for different projects over different parts of the world, and also helps partners in developing countries to use the dataIRI uses these products for different projects over different parts of the world, and also helps partners in developing countries to use the data Thus, we have great interest in understanding the quality of these productsThus, we have great interest in understanding the quality of these products

International Research Institute for Climate and Society Validation over different regions Current validation regions 1.Ethiopia: Validation at spatial and temporal, scales 2.Desert locust recession regions : Validation at daily time scale and spatial resolution of 0.25-deg. 3.Zimbabwe: validation at of 0.25-deg 4. Madagascar: Validation different temporal and spatial scales 5.Columbia: Validation at different temporal and spatial scales

International Research Institute for Climate and Society Validation over Columbia

International Research Institute for Climate and SocietyColumbia

Rainfall climatology (Source: Climate Atlas of Colombia)

International Research Institute for Climate and Society Raingauge data -Over 500 station obtained from Columbia Met. Service - About 300 used after quality control - Daily: Monthly: used: Minimum 20 gauges (up to 60) per 2.5-deg grid - One gauges per 0.25 deg grid

International Research Institute for Climate and Society Validation of monthly 2.5 o

International Research Institute for Climate and Society 2.5-deg: All data N=660 TRMM- 3B43 CMAP GPCP- SG GPCP- MS CC Bias ME RMS Eff

International Research Institute for Climate and Society 2.5-deg: Western Columbia N=373TRMM-3B43CMAP GPCP- MS GPCP- SG CC Bias ME RMS Eff

International Research Institute for Climate and Society 2.5-deg: Eastern Colombia N=287 TRMM- 3B43 CMAP GPCP- MS GPCP-SGCC Bias ME RMS Eff

International Research Institute for Climate and Society Daily at 0.25 degree

International Research Institute for Climate and Society Daily 0.25-deg GSMaPPRSNRL3B423B42RTCMORPH Corr Eff Bias ME MAE CSI POD FAR ETS HKS HSS

International Research Institute for Climate and Society Hourly 0.25-deg

International Research Institute for Climate and SocietySummary Validation over region of complex topography and VERY high spatial rainfall variabilityValidation over region of complex topography and VERY high spatial rainfall variability The performance of the products is poorer than what have been observed over another complex terrain.The performance of the products is poorer than what have been observed over another complex terrain. Poorer performance over western (wetter) part as compared to the eastern partsPoorer performance over western (wetter) part as compared to the eastern parts TRMM products seem to do relatively better at both time/space scalesTRMM products seem to do relatively better at both time/space scales