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Terrestrial Water StorageDuring 2014 dryness continued in the Northern Hemisphere and relative wetness continued in the Southern Hemisphere (Fig. 2.21; Plate 2.1g). These largely canceled out such that the global land surface began and ended the year with a terrestrial water storage (TWS) anomaly slightly below 0 cm (equivalent height of water; Fig. 2.22). TWS is the sum of groundwater, soil moisture, surface water, snow, and ice. Groundwater responds more slowly to meteorological phenomena than the other components because the overlying soil acts as a low pass filter, but often it has a larger range of variability on multiannual timescales (Rodell and Famiglietti 2001; Alley et al. 2002).In situ groundwater data are only archived and made and Tanzania. The rest of the continent experienced mixed to dry conditions. Significant reductions in TWS in Greenland, Antarctica, and southern coastal Alaska reflect ongoing ice sheet and glacier ablation, not groundwater depletion.
Document ID
Document Type
Reprint (Version printed in journal)
Rodell, M. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Chambers, D. P. (University of South Florida Tampa, FL, United States)
Famiglietti, J. S. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
November 30, 2016
Publication Date
July 1, 2015
Publication Information
Publication: Bulletin of the American Meteorological Society
Volume: 96
Issue: 7
ISSN: 0003-0007
Subject Category
Earth Resources and Remote Sensing
Meteorology and Climatology
Report/Patent Number
Distribution Limits
Northern Hemisphere
glacier ablation