globalchange  > 气候变化事实与影响
DOI: 10.1016/j.atmosres.2018.12.001
Scopus记录号: 2-s2.0-85058226617
论文题名:
Grid box-level evaluation of IMERG over Brazil at various space and time scales
作者: Gadelha A.N.; Coelho V.H.R.; Xavier A.C.; Barbosa L.R.; Melo D.C.D.; Xuan Y.; Huffman G.J.; Petersen W.A.; Almeida C.D.N.
刊名: Atmospheric Research
ISSN: 1698095
出版年: 2019
卷: 218
起始页码: 231
结束页码: 244
语种: 英语
英文关键词: Final run ; Global precipitation measurement ; Gridded rainfall ; Performance
Scopus关键词: Infrared detectors ; Microwave sensors ; Rain gages ; Satellites ; Soil moisture ; Uncertainty analysis ; Final run ; Global precipitation measurement missions ; Global precipitation measurements ; Performance ; Precipitation measurement ; Satellite products ; Satellite retrieval ; Spatio-temporal resolution ; Rain ; coastal zone ; ground-based measurement ; precipitation (climatology) ; rainfall ; raingauge ; satellite data ; Brazil
英文摘要: Rainfall data from the Global Precipitation Measurement (GPM) mission provide a new source of information with high spatiotemporal resolution that overcomes the limitations of ground-based rainfall information worldwide. This study evaluates the performance of the Integrated multi-satellitE Retrievals for GPM (IMERG) Final Run product over Brazil by means of multi-temporal and -spatial analyses. The assessment of the IMERG Final Run product is based on six statistics obtained for the period between January–December 2016 (daily, monthly, and annual basis). The analysis consisted of comparing the satellite-based estimates against a ground-based gridded rainfall product created using daily records from 4911 rain gauges distributed throughout Brazil. Overall, the results show that the IMERG product can effectively capture the spatial patterns of rainfall across Brazil. However, the IMERG product presents a slight tendency in overestimating the ground-based rainfall at all timescales. Furthermore, the performance of the satellite product varies throughout the region. The higher errors and biases are found in the North and Central-West regions, but the low density of rain gauges in those regions can be a source of large deviations between IMERG estimates and observations. A large underestimation of the IMERG data is evident along the coastal zone of the North-east region, probably due to the inability of the passive microwave and infrared sensors to detect warm-rain processes over land. This study shows that the IMERG product can be a good source of rainfall data to complement the ground precipitation measurements in most of Brazil, although some uncertainties are found and need to be further studied © 2018
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122340
Appears in Collections:气候变化事实与影响

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作者单位: Department of Civil and Environmental Engineering, Federal University of Paraíba, João Pessoa, PB 58051-900, Brazil; Department of Rural Engineering, Federal University of Espírito Santo, Alegre, ES 29500-000, Brazil; Institute of Environmental Science and Geography, University of Potsdam, Potsdam, BB 14476, Germany; Department of Soils and Rural Engineering, Federal University of Paraíba, Areia, PB 58397-000, Brazil; Department Hydraulics and Sanitary Engineering, University of São Paulo, São Carlos, SP 13566-590, Brazil; College of Engineering, Swansea University, Swansea, SA1 8EN, United Kingdom; NASA Goddard Space Flight Center, Greenbelt, MD 20771, United States; NASA Marshall Space Flight Center, Huntsville, AL 35805, United States

Recommended Citation:
Gadelha A.N.,Coelho V.H.R.,Xavier A.C.,et al. Grid box-level evaluation of IMERG over Brazil at various space and time scales[J]. Atmospheric Research,2019-01-01,218
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