Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018WR022950 |
Downscaling of Rainfall Extremes From Satellite Observations | |
Zorzetto, Enrico1; Marani, Marco1,2,3 | |
2019 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2019 |
卷号 | 55期号:1页码:156-174 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Italy |
英文摘要 | The estimation of the frequency of intense rainfall events is a crucial step for quantifying their impact on human societies and on the environment. This process is hindered by large gaps in ground observational networks at the global scale, such that extensive areas remain ungauged. The increasing availability of satellite-based rainfall estimates, while providing data with unprecedented resolution and global coverage, also introduces new challenges: the scale disparity between gridded and rain-gauge precipitation products on the one hand, and the short length of the available satellite records on the other. Here we propose a statistical framework for the estimation of rainfall extremes that is specifically designed to simultaneously address these two key issues, providing a new way of estimating extreme rainfall magnitudes from space. A downscaling procedure is here introduced to recover the spatial correlation and the probability density function of daily rainfall at the point (gauge) scale from coarse-scale satellite estimates. The results are then combined with a recent statistical model of extremes (the Metastatistical Extreme Value distribution), which optimizes the use of the information obtained from relatively short satellite observational time series. The methodology is tested using data from the Tropical Rainfall Measuring Mission Multisatellite Precipitation Analysis over the Little Washita River, Oklahoma. We find that our approach satisfactorily reproduces downscaled daily rainfall probability density functions and can significantly improve the Tropical Rainfall Measuring Mission Multisatellite Precipitation Analysis-based estimation of quantiles with return times larger than the length of the available data set (19years here), which are especially important for several water-related applications. |
英文关键词 | eainfall extremes extreme values |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000459536500009 |
WOS关键词 | MESOSCALE RAINFALL ; POINT RAINFALL ; TIME ; SPACE ; MODEL ; DISTRIBUTIONS ; VARIABILITY ; RADAR ; TMPA |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/21197 |
专题 | 资源环境科学 |
作者单位 | 1.Duke Univ, Div Earth & Ocean Sci, Durham, NC 27708 USA; 2.Duke Univ, Dept Civil & Environm Engn, Durham, NC 27706 USA; 3.Univ Padua, Dipartimento Ingn Civile Edile & Ambientale, Padua, Italy |
推荐引用方式 GB/T 7714 | Zorzetto, Enrico,Marani, Marco. Downscaling of Rainfall Extremes From Satellite Observations[J]. WATER RESOURCES RESEARCH,2019,55(1):156-174. |
APA | Zorzetto, Enrico,&Marani, Marco.(2019).Downscaling of Rainfall Extremes From Satellite Observations.WATER RESOURCES RESEARCH,55(1),156-174. |
MLA | Zorzetto, Enrico,et al."Downscaling of Rainfall Extremes From Satellite Observations".WATER RESOURCES RESEARCH 55.1(2019):156-174. |
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