Journal article
Evaluation of three high-resolution satellite precipitation estimates: Potential for monsoon monitoring over Pakistan
Advances in space research, Vol.54(4), pp.670-684
08/15/2014
DOI: 10.1016/j.asr.2014.04.017
Abstract
Multi-sensor precipitation datasets including two products from the Tropical Rainfall Measuring Mission (TRMM) Multi-satellite Precipitation Analysis (TMPA) and estimates from Climate Prediction Center Morphing Technique (CMORPH) product were quantitatively evaluated to study the monsoon variability over Pakistan. Several statistical and graphical techniques are applied to illustrate the nonconformity of the three satellite products from the gauge observations. During the monsoon season (JAS), the three satellite precipitation products captures the intense precipitation well, all showing high correlation for high rain rates (>30 mm/day). The spatial and temporal satellite rainfall error variability shows a significant geo-topography dependent distribution, as all the three products overestimate over mountain ranges in the north and coastal region in the south parts of Indus basin. The TMPA-RT product tends to overestimate light rain rates (approximately 100%) and the bias is low for high rain rates (about +/- 20%). In general, daily comparisons from 2005 to 2010 show the best agreement between the TMPA-V7 research product and gauge observations with correlation coefficient values ranging from moderate (0.4) to high (0.8) over the spatial domain of Pakistan. The seasonal variation of rainfall frequency has large biases (100-140%) over high latitudes (36N) with complex terrain for daily, monsoon, and pre-monsoon comparisons. Relatively low uncertainties and errors (Bias +/- 25% and MAE 1-10 mm) were associated with the TMPA-RT product during the monsoon-dominated region (32-35N), thus demonstrating their potential use for developing an operational hydrological application of the satellite-based near real-time products in Pakistan for flood monitoring. (C) 2014 COSPAR. Published by Elsevier Ltd. All rights reserved.
Details
- Title: Subtitle
- Evaluation of three high-resolution satellite precipitation estimates: Potential for monsoon monitoring over Pakistan
- Creators
- Sadiq Ibrahim Khan - University of OklahomaYang Hong - University of OklahomaJonathan J. Gourley - NOAA National Severe Storms LaboratoryMuhammad Umar Khan Khattak - National University of Sciences and TechnologyBin Yong - State Key Laboratory of Hydrology-Water Resources and Hydraulic EngineeringHumberto J. Vergara - University of Oklahoma
- Resource Type
- Journal article
- Publication Details
- Advances in space research, Vol.54(4), pp.670-684
- Publisher
- Elsevier
- DOI
- 10.1016/j.asr.2014.04.017
- ISSN
- 0273-1177
- eISSN
- 1879-1948
- Number of pages
- 15
- Grant note
- Higher Education Commission of Pakistan (HEC); Higher Education Commission of Pakistan United States Agency for International Development (USAID); CGIAR Ministry of Science and Technology (MOST); Ministry of Science and Technology, China Pakistan-US Science and Technology Cooperation Program
- Language
- English
- Date published
- 08/15/2014
- Academic Unit
- Civil and Environmental Engineering
- Record Identifier
- 9984446518402771
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