Comparative evaluation of different satellite rainfall estimation products and bias correction in the Upper Blue Nile (UBN) basin

Abstract In a region where ground-based gauge data are scarce, satellite rainfall estimates (SREs) are a viable option for proper space–time rainfall characterization. However, their accuracy and performances vary from region to region, and must be assessed. In this study, five high resolution satellite products (3B42V7, CMORPH, TAMSAT, SM2R-CCI, and CFSR) are compared and analyzed using the available rain gauge data in one of the most topographically and climatologically complex basin of Africa, the Upper Blue Nile basin (UBN). The basin rainfall is investigated systematically, and it is found that, at some locations, the difference in mean annual rainfall estimates between these SREs could be as much as about 2700 mm. Considering three goodness-of-fit indexes, correlation, bias and root mean square error (RMSE) between the SREs and ground-based gauge rainfall, CMORPH, TAMSAT and SM2R-CCI outperform the other two. Furthermore, a confusion matrix is used to investigate the detection ability of satellite rainfall products for different rainfall intensities. TAMSAT has the highest (91%) detection skill for dry days, followed by CFSR (77%). On the contrary, SM2R-CCI has the highest accuracy index for medium rainfall ranges (10–20 mm). The empirical cumulative distribution ( ecdf ) mapping technique is used to correct the intensities distribution givenby the SREs. This method provides a means to improve the rainfall estimation of all SREs, and the highest improvement is obtained for CMORPH (bias reduction from − 72% to − 1%).

[1]  T. N. Krishnamurti,et al.  The status of the tropical rainfall measuring mission (TRMM) after two years in orbit , 2000 .

[2]  T. Hata,et al.  Models for recession flows in the upper Blue Nile River , 2004 .

[3]  M. Iredell,et al.  The NCEP Climate Forecast System Version 2 , 2014 .

[4]  William Teng,et al.  Online Visualization and Analysis: A New Avenue to use Satellite Data for Weather, Climate, and Interdisciplinary Research and Applications , 2007 .

[5]  A. Rinaldo,et al.  Point rainfall statistics for ecohydrological analyses derived from satellite integrated rainfall measurements , 2015 .

[6]  Wim G.M. Bastiaanssen,et al.  First results from Version 7 TRMM 3B43 precipitation product in combination with a new downscaling–calibration procedure , 2013 .

[7]  Elena Tarnavsky,et al.  Extension of the TAMSAT Satellite-Based Rainfall Monitoring over Africa and from 1983 to Present , 2014 .

[8]  Mekonnen Gebremichael,et al.  Evaluation of High-Resolution Satellite Rainfall Products through Streamflow Simulation in a Hydrological Modeling of a Small Mountainous Watershed in Ethiopia , 2012 .

[9]  Emad Habib,et al.  Accuracy of the CMORPH satellite-rainfall product over Lake Tana Basin in eastern Africa , 2015 .

[10]  Anzhi Wang,et al.  Spatio-Temporal Analysis of the Accuracy of Tropical Multisatellite Precipitation Analysis 3B42 Precipitation Data in Mid-High Latitudes of China , 2015, PloS one.

[11]  W. Bewket,et al.  Summer Rains and Dry Seasons in the Upper Blue Nile Basin: The Predictability of Half a Century of Past and Future Spatiotemporal Patterns , 2013, PloS one.

[12]  D. Conway,et al.  The Climate and Hydrology of the Upper Blue Nile River , 2000 .

[13]  Daniel Vila,et al.  Combining TRMM and Surface Observations of Precipitation: Technique and Validation over South America , 2010 .

[14]  G. Brier,et al.  Some applications of statistics to meteorology , 1958 .

[15]  Z. Easton,et al.  Predicting discharge and sediment for the Abay (Blue Nile) with a simple model , 2009 .

[16]  G. Huffman,et al.  TRMM and Other Data Precipitation Data Set Documentation , 2015 .

[17]  F. Hirpa,et al.  Evaluation of High-Resolution Satellite Precipitation Products over Very Complex Terrain in Ethiopia , 2010 .

[18]  W. Wagner,et al.  Integration of Satellite Soil Moisture and Rainfall Observations over the Italian Territory , 2015 .

[19]  C. Frei,et al.  Trends of heavy precipitation and wet and dry spells in Switzerland during the 20th century , 2005 .

[20]  Emad Habib,et al.  Climatology-Focused Evaluation of CMORPH and TMPA Satellite Rainfall Products over the Nile Basin , 2012 .

[21]  T. Steenhuis,et al.  Changes in land cover, rainfall and stream flow in Upper Gilgel Abbay catchment, Blue Nile basin – Ethiopia , 2011 .

[22]  Isabelle Jobard,et al.  Validation of satellite and ground-based estimates of precipitation over the Sahel , 1998 .

[23]  C. Ropelewski,et al.  Validation of satellite rainfall products over East Africa's complex topography , 2007 .

[24]  R. Saunders,et al.  The TAMORA algorithm: satellite rainfall estimates over West Africa using multi-spectral SEVIRI data , 2010 .

[25]  Ralph Ferraro,et al.  Special sensor microwave imager derived global rainfall estimates for climatological applications , 1997 .

[26]  A. Wale,et al.  Ungauged catchment contributions to Lake Tana's water balance , 2009 .

[27]  Tim J. Hewison,et al.  The 30 year TAMSAT African Rainfall Climatology And Time series (TARCAT) data set , 2014 .

[28]  J. Janowiak,et al.  COMPARISON OF NEAR-REAL-TIME PRECIPITATION ESTIMATES FROM SATELLITE OBSERVATIONS AND NUMERICAL MODELS , 2007 .

[29]  D. Conway.  A water balance model of the Upper Blue Nile in Ethiopia , 1997 .

[30]  Mekonnen Gebremichael,et al.  Accuracy of satellite rainfall estimates in the Blue Nile Basin: Lowland plain versus highland mountain , 2014 .

[31]  Y. Hong,et al.  The TRMM Multisatellite Precipitation Analysis (TMPA): Quasi-Global, Multiyear, Combined-Sensor Precipitation Estimates at Fine Scales , 2007 .

[32]  C. Kummerow,et al.  The Tropical Rainfall Measuring Mission (TRMM) Sensor Package , 1998 .

[33]  T. Steenhuis,et al.  Comparison of rainfall estimations by TRMM 3B42, MPEG and CFSR with ground-observed data for the Lake Tana basin in Ethiopia , 2014 .

[34]  Soo-Hyun Yoo,et al.  An assessment of the surface climate in the NCEP climate forecast system reanalysis , 2011 .

[35]  D. Pierce,et al.  Bias correction can modify climate model simulated precipitation changes without adverse effect on the ensemble mean , 2013 .

[36]  F. Chopin,et al.  An intercomparison of 10-day satellite precipitation products during West African monsoon , 2011 .

[37]  W. Wagner,et al.  Evaluation of the ESA CCI soil moisture product using ground-based observations , 2015 .

[38]  A. Gobiet,et al.  Multi-variable error correction of regional climate models , 2013, Climatic Change.

[39]  Juan Puigdefábregas,et al.  Analysis of a 30-year rainfall record (1967-1997) in semi-arid SE Spain for implications on vegetation , 2001 .

[40]  Paul-Antoine Michelangeli,et al.  Probabilistic downscaling approaches: Application to wind cumulative distribution functions , 2009 .

[41]  Steven Kempler,et al.  Tropical Rainfall Measuring Mission (TRMM) Precipitation Data and Services for Research and Applications , 2012 .

[42]  Uang,et al.  The NCEP Climate Forecast System Reanalysis , 2010 .

[43]  Emad Habib,et al.  Evaluation of the climate prediction center (CPC) morphing technique (CMORPH) rainfall product on hourly time scales over the source of the Blue Nile River , 2013 .

[44]  Fuzhong Weng,et al.  Retrieval of Ice Cloud Parameters Using the Advanced Microwave Sounding Unit , 2002 .

[45]  Arun Kumar,et al.  An assessment of oceanic variability in the NCEP climate forecast system reanalysis , 2011 .

[46]  A. Gobiet,et al.  Empirical‐statistical downscaling and error correction of daily precipitation from regional climate models , 2011 .

[47]  S. J. Connor,et al.  Validation of high‐resolution satellite rainfall products over complex terrain , 2008 .

[48]  J. Janowiak,et al.  CMORPH: A Method that Produces Global Precipitation Estimates from Passive Microwave and Infrared Data at High Spatial and Temporal Resolution , 2004 .

[49]  Y. Seleshi,et al.  Recent changes in rainfall and rainy days in Ethiopia , 2004 .

[50]  V. Smakhtin,et al.  Generation of Monthly Precipitation Under Climate Change for the Upper Blue Nile River Basin, Ethiopia 1 , 2008 .

[51]  S. Sorooshian,et al.  Evaluation of PERSIANN system satellite-based estimates of tropical rainfall , 2000 .

[52]  Yudong Tian,et al.  Multitemporal Analysis of TRMM-Based Satellite Precipitation Products for Land Data Assimilation Applications , 2007 .

[53]  A. Melesse,et al.  Spatial, inter and intra‐annual variability of the Upper Blue Nile Basin rainfall , 2009 .

[54]  Daniel Vila,et al.  Evaluation of high-resolution satellite precipitation estimates over southern South America using a dense rain gauge network , 2015 .

[55]  M. Hulme,et al.  Recent fluctuations in precipitation and runoff over the Nile sub-basins and their impact on main Nile discharge , 1993 .

[56]  Mekonnen Gebremichael,et al.  Evaluation of satellite rainfall estimates over Ethiopian river basins , 2010 .

[57]  Y.‐C. Gao,et al.  Evaluation of high-resolution satellite precipitation products using rain gauge observations over the Tibetan Plateau , 2012 .

[58]  H. Wheater,et al.  Evaluation of precipitation products over complex mountainous terrain: A water resources perspective , 2011 .

[59]  Sung-Euii Moon,et al.  A Markov chain model for daily precipitation occurrence in South Korea , 1994 .

[60]  James C. Bennett,et al.  Performance of an empirical bias‐correction of a high‐resolution climate dataset , 2014 .

[61]  Ross Maidment,et al.  Investigation of Discrepancies in Satellite Rainfall Estimates over Ethiopia , 2014 .

[62]  A. S. Gragne,et al.  Analyzing catchment behavior through catchment modeling in the Gilgel Abay, Upper Blue Nile River Basin, Ethiopia , 2010 .

[63]  S. Saha,et al.  The NCEP Climate Forecast System , 2006 .

[64]  Eulogio Pardo-Igúzquiza,et al.  Optimal areal rainfall estimation using raingauges and satellite data , 1999 .

[65]  Y. Travi,et al.  Water balance of Lake Tana and its sensitivity to fluctuations in rainfall, Blue Nile basin, Ethiopia , 2006 .

[66]  D. Grimes,et al.  Comparison of TAMSAT and CPC rainfall estimates with raingauges, for southern Africa , 2001 .

[67]  Tammo S. Steenhuis,et al.  Using the Climate Forecast System Reanalysis as weather input data for watershed models , 2014 .

[68]  Urban Brandstrom,et al.  Optical and ionospheric phenomena at EISCAT under continuous X‐mode HF pumping , 2014 .

[69]  T. Hata,et al.  A grid-based runoff generation and flow routing model for the Upper Blue Nile basin , 2006 .

[70]  D. S. Pai,et al.  Comparing two high‐resolution gauge‐adjusted multisatellite rainfall products over India for the southwest monsoon period , 2015 .

[71]  D. Conway,et al.  From headwater tributaries to international river: Observing and adapting to climate variability and change in the Nile basin , 2005 .

[72]  Yu Zhang,et al.  Effect of Bias Correction of Satellite-Rainfall Estimates on Runoff Simulations at the Source of the Upper Blue Nile , 2014, Remote. Sens..

[73]  W. Wagner,et al.  Soil as a natural rain gauge: Estimating global rainfall from satellite soil moisture data , 2014 .

[74]  Andreas Gobiet,et al.  Empirical-statistical downscaling and error correction of regional climate models and its impact on the climate change signal , 2012, Climatic Change.

[75]  Koji Dairaku,et al.  Evaluation and intercomparison of downscaled daily precipitation indices over Japan in present-day climate: Strengths and weaknesses of dynamical and bias correction-type statistical downscaling methods , 2011 .

[76]  Hubert H. G. Savenije,et al.  Water balance modeling of Upper Blue Nile catchments using a top-down approach , 2010 .

[77]  W. Graham,et al.  Development and comparative evaluation of a stochastic analog method to downscale daily GCM precipitation , 2013 .

[78]  C. M. Kishtawal,et al.  Impact of satellite rainfall assimilation on Weather Research and Forecasting model predictions over the Indian region , 2014 .

[79]  W. Wagner,et al.  A new method for rainfall estimation through soil moisture observations , 2013 .

[80]  D. Mugendi,et al.  Rainfall Variability, Drought Characterization, and Efficacy of Rainfall Data Reconstruction: Case of Eastern Kenya , 2015 .

[81]  Marco Petracca,et al.  On the uncertainties in validating satellite instantaneous rainfall estimates with raingauge operational network , 2014 .

[82]  M. Gebremichael,et al.  Satellite rainfall applications for surface hydrology , 2010 .

[83]  Hamidreza Norouzi,et al.  Systematic and random error components in satellite precipitation data sets , 2012 .

[84]  G. Sterk,et al.  Dynamics in land cover and its effect on stream flow in the Chemoga watershed, Blue Nile basin, Ethiopia , 2005 .

[85]  F. Hossain,et al.  Investigating Error Metrics for Satellite Rainfall Data at Hydrologically Relevant Scales , 2008 .

[86]  O. Leo,et al.  Evaluation of satellite‐based and model re‐analysis rainfall estimates for Uganda , 2013 .

[87]  Asit K. Biswas,et al.  River Basin Planning And Management , 1996 .