气候变化领域集成服务门户(CCPortal): Satellite-Derived Global Surface Water Extent and Dynamics Over the Last 25 Years (GIEMS-2)

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DOI	10.1029/2019JD030711
	Satellite-Derived Global Surface Water Extent and Dynamics Over the Last 25 Years (GIEMS-2)
	Prigent C.; Jimenez C.; Bousquet P.
发表日期	2020
ISSN	2169897X
卷号	125 期号:3
英文摘要	A method has been developed to extend the Global Inundation Estimate from Multiple Satellites (GIEMS). The method presented here is based on retrieval principals similar to GIEMS but with an updated estimation of microwave emissivity in order to be less dependent on ancillary data and with some changes to the final surface water estimation to correct a known overestimation over low vegetation areas. The new methodology, GIEMS-2, provides monthly estimates of surface water extent, including open water, wetlands, or rice paddies, and it has been applied to the Special Sensor Microwave/Imager and the Special Sensor Microwave Imager Sounder intercalibrated observations to produce a global data record of surface water extent from 1992 to 2015, on an equal area grid of 0.25° × 0.25° at the equator (∼25 km). The time series have been thoroughly evaluated: they are seamless and do not show any obvious artifact related to changes in satellite instrumentation over the ∼25 years. Comparisons with precipitation estimates show good agreement, displaying expected patterns related to surface conditions and precipitation regimes. The temporal variability of basin-averaged estimates has also been compared with altimeter river height, showing a reasonable agreement. Production will be continued up to current time as soon as the observations become available, with efforts to improve the spatial and temporal resolutions of the estimates currently underway. ©2019. American Geophysical Union. All Rights Reserved.
英文关键词	remote sensing; surface water; wetlands
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186195
作者单位	Sorbonne Université, Observatoire de Paris, Université PSL, CNRS, LERMA, Paris, France; Estellus, Paris, France; Laboratoire des Sciences du Climat et de l'Environnement, CEA/CNRS/UVSQ, Université Paris Saclay, GifsurYvette, France
推荐引用方式 GB/T 7714	Prigent C.,Jimenez C.,Bousquet P.. Satellite-Derived Global Surface Water Extent and Dynamics Over the Last 25 Years (GIEMS-2)[J],2020,125(3).
APA	Prigent C.,Jimenez C.,&Bousquet P..(2020).Satellite-Derived Global Surface Water Extent and Dynamics Over the Last 25 Years (GIEMS-2).Journal of Geophysical Research: Atmospheres,125(3).
MLA	Prigent C.,et al."Satellite-Derived Global Surface Water Extent and Dynamics Over the Last 25 Years (GIEMS-2)".Journal of Geophysical Research: Atmospheres 125.3(2020).