DOI: 10.1029/2019JD030711
论文题名: Satellite-Derived Global Surface Water Extent and Dynamics Over the Last 25 Years (GIEMS-2)
作者: Prigent C. ; Jimenez C. ; Bousquet P.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2020
卷: 125, 期: 3 语种: 英语
英文关键词: remote sensing
; surface water
; wetlands
Scopus关键词: altimeter
; remote sensing
; surface water
; wetland
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159260
Appears in Collections: 气候变化与战略
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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
Recommended Citation:
Prigent C.,Jimenez C.,Bousquet P.. Satellite-Derived Global Surface Water Extent and Dynamics Over the Last 25 Years (GIEMS-2)[J]. Journal of Geophysical Research: Atmospheres,2020-01-01,125(3)