DOI: 10.1175/JCLI-D-16-0458.1
Scopus记录号: 2-s2.0-85019936821
论文题名: Satellite observations of regional drought severity in the continental United States using GRACE-based terrestrial water storage changes
作者: Zhao M. ; Geruo A. ; Velicogna I. ; Kimball J.S.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期: 16 起始页码: 6297
结束页码: 6308
语种: 英语
Scopus关键词: Digital storage
; Geodetic satellites
; Groundwater
; Hydrology
; Information management
; Remote sensing
; Satellites
; Soil moisture
; Vegetation
; Water management
; Water supply
; Gravity recovery and climate experiments
; Hydrometeorology
; Meteorological forcing
; Normalized difference vegetation index
; Palmer drought severity indices
; Satellite observations
; Soil water balance model
; Terrestrial water storage
; Drought
英文摘要: Drought monitoring is important for characterizing the timing, extent, and severity of drought for effective mitigation and water management. Presented here is a novel satellite-based drought severity index (DSI) for regional monitoring derived using time-variable terrestrial water storage changes from the Gravity Recovery and Climate Experiment (GRACE). The GRACE-DSI enables drought feature comparison across regions and periods, it is unaffected by uncertainties associated with soil water balance models and meteorological forcing data, and it incorporates water storage changes from human impacts including groundwater withdrawals that modify land surface processes and impact water management. Here, the underlying algorithm is described, and the GRACE-DSI performance in the continental United States during 2002-14 is evaluated. It is found that the GRACE-DSI captures documented regional drought events and shows favorable spatial and temporal agreement with the monthly Palmer Drought Severity Index (PDSI) and the U.S. Drought Monitor (USDM). The GRACE-DSI also correlates well with a satellite-based normalized difference vegetation index (NDVI), indicating sensitivity to plant-available water supply changes affecting vegetation growth. Because the GRACE-DSI captures changes in total terrestrial water storage, it complements more traditional drought monitoring tools such as the PDSI by providing information about deeper water storage changes that affect soil moisture recharge and drought recovery. The GRACE-DSI shows potential for globally consistent and effective drought monitoring, particularly where sparse ground observations (especially precipitation) limit the use of traditional drought monitoring methods. © 2017 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/48766
Appears in Collections: 气候减缓与适应 气候变化与战略
There are no files associated with this item.
作者单位: Department of Earth System Science, University of California, Irvine, Irvine, CA, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; Numerical Terradynamic Simulation Group, College of Forestry and Conservation, University of Montana, Missoula, MT, United States
Recommended Citation:
Zhao M.,Geruo A.,Velicogna I.,et al. Satellite observations of regional drought severity in the continental United States using GRACE-based terrestrial water storage changes[J]. Journal of Climate,2017-01-01,30(16)