Satellite precipitation product:Applicability and accuracy evaluation in diverse region  

作　　者：MUHAMMAD Ehtsham MUHAMMAD Waseem AHMAD Ijaz MUHAMMAD KHAN Noor CHEN Si 

机构地区：[1]Centre of Excellence in Water Resources Engineering,University of Engineering and Technology,Lahore 54890,Pakistan [2]Department of Civil Engineering,University of Engineering and Technology,Lahore 54890,Pakistan [3]School of Resources and Environment,Hubei University,Wuhan 430062,China [4]Hubei Key Laboratory of Regional Development and Environmental Response,Wuhan 430062,China

出　　处：《Science China(Technological Sciences)》2020年第5期819-828,共10页中国科学（技术科学英文版）

基　　金：supported by the Project of Hubei Key Laboratory of Regional Development and Environmental Response(Hubei University)(Grant No.2018A003)。

摘　　要：Satellite precipitation products,e.g.,Tropical Rainfall Measuring Mission version-07(hereafter TRMM)and its successor Integrated Multi-Satellite Retrievals for Global Precipitation Measurement(hereafter IMERG)are being used at a global scale for rainfall estimation.Recently,SM2RAIN-ASCAT(hereafter SM2RAIN)is a novel addition to satellite-based precipitation products which gives the rainfall estimates from the knowledge of soil moisture state and is based on‘bottom to top’approach.A comparative assessment of any newly developed product or a new version of the product is quite vital for algorithm developers and users.Hence,this research work was carried out to evaluate the accuracy and applicability of SM2RAIN,in comparison to in-situ data,TRMM,and IMERG in diverse regions of Pakistan.The comparative analysis was performed on a temporal scale(daily and monthly)and seasonal scale(spring,autumn,summer,and winter)using five performance metrics namely,root mean square error(RMSE),correlation coefficient(CC),false alarm ratio(FAR),the probability of detection(POD),and critical success index(CSI).The results showed that:(1)SM2RAIN is a better rainfall estimation product in the dry region(having avg.CC>0.35),however,less effective in hilly and mountainous terrain having high rainfall intensity;(2)SM2RAIN provides more satisfactory estimates in winter and autumn seasons,while relative poor in the summer season;(3)SM2RAIN performs better in terms of rainfall detection with an average POD of 0.61;(4)the overall performance of SM2RAIN is very convincing and it was concluded that SM2RAIN can be a feasible satellite product for most of the areas of Pakistan.It is noteworthy here to mention that this could be the preliminary assessment of SM2RAIN in diverse climatic zones of Pakistan.

关 键 词：SM2RAIN satellite product TRMM IMERG Pakistan 

分 类 号：P426.6[天文地球—大气科学及气象学] P412.27