globalchange  > 气候减缓与适应
DOI: 10.1029/2017JD027596
Scopus记录号: 2-s2.0-85053061508
论文题名:
The Instantaneous Retrieval of Precipitation Over Land by Temporal Variation at 19 GHz
作者: You Y.; Peters-Lidard C.; Wang N.-Y.; Turk J.; Ringerud S.; Yang S.; Ferraro R.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期:17
起始页码: 9279
结束页码: 9295
语种: 英语
英文关键词: precipitation retrieval ; satellite constellation ; TB temporal variation
英文摘要: The primary signal used in all current passive microwave precipitation retrieval algorithms over land is the depression of the instantaneous brightness temperature (TB) caused by ice scattering. This study presents a new methodology to retrieve instantaneous precipitation rate over land by using TB temporal variation (ΔTB) at 19 GHz, which primarily reflects the surface emissivity variation due to the precipitation impact. As a proof-of-concept, we exploit observations from five polar-orbiting satellites over the Southern Great Plains of the United States. Results show that ΔTB at 19 GHz correlate well with the instantaneous precipitation rate. Further analysis shows that ΔTB at 19 GHz is better correlated with the precipitation rate when multiple satellite observations are used due to the much shorter revisit time for a certain location. The retrieved instantaneous precipitation rate over Southern Great Plains from ΔTB at 19 GHz reasonably agrees with the surface radar observations, with the correlation, the root-mean-square error and the bias being 0.49, 2.39 mm/hr, and 6.54%, respectively. Future work seeks to combine the ice scattering signal at high frequencies and this surface emissivity variation signal at low frequencies to achieve an optimal retrieval performance. ©2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113221
Appears in Collections:气候减缓与适应

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作者单位: Earth System Science Interdisciplinary Center/Cooperative Institute for Climate and Satellites, University of Maryland, College Park, MD, United States; Hydrological Sciences Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; Naval Research Laboratory, Monterey, CA, United States; NOAA/NESDIS/STAR, College Park, MD, United States

Recommended Citation:
You Y.,Peters-Lidard C.,Wang N.-Y.,et al. The Instantaneous Retrieval of Precipitation Over Land by Temporal Variation at 19 GHz[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(17)
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