气候变化领域集成服务门户(CCPortal): Grid box-level evaluation of IMERG over Brazil at various space and time scales

CCPortal

DOI	10.1016/j.atmosres.2018.12.001
	Grid box-level evaluation of IMERG over Brazil at various space and time scales
	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.
发表日期	2019
ISSN	0169-8095
起始页码	231
结束页码	244
卷号	218
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
英文关键词	Final run; Global precipitation measurement; Gridded rainfall; Performance
语种	英语
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
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162065
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
推荐引用方式 GB/T 7714	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],2019,218.
APA	Gadelha A.N..,Coelho V.H.R..,Xavier A.C..,Barbosa L.R..,Melo D.C.D..,...&Almeida C.D.N..(2019).Grid box-level evaluation of IMERG over Brazil at various space and time scales.Atmospheric Research,218.
MLA	Gadelha A.N.,et al."Grid box-level evaluation of IMERG over Brazil at various space and time scales".Atmospheric Research 218(2019).