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Recent La Plata basin drought conditions observed by satellite gravimetry

descriptionPublicationkeyboard_double_arrow_right Article , Preprint , Journal , Other literature type 18 Nov 2010Embargo end date: 01 Jan 2010 Germany, France Publisher:American Geophysical Union (AGU)Journal:Journal of Geophysical Research: Atmospheres, volume 115 (issn: 0148-0227, Copyright policy )Funded by:NSF | IPY: Investigation of Ant...
Authors: Chen, J.; Wilson, C.; Tapley, B.; Longuevergne, L.; Yang, Z.; Scanlon, B.;

doi: 10.1029/2010jd014689 , 10.48550/arxiv.1011.4352

arXiv: http://arxiv.org/abs/1011.4352 , 1011.4352

Recent La Plata basin drought conditions observed by satellite gravimetry

Abstract

The Gravity Recovery and Climate Experiment (GRACE) provides quantitative measures of terrestrial water storage (TWS) change. GRACE data show a significant decrease in TWS in the lower (southern) La Plata river basin of South America over the period 2002–2009, consistent with recognized drought conditions in the region. GRACE data reveal a detailed picture of temporal and spatial evolution of this severe drought event, which suggests that the drought began in lower La Plata in around austral spring 2008 and then spread to the entire La Plata basin and peaked in austral fall 2009. During the peak, GRACE data show an average TWS deficit of ∼12 cm (equivalent water layer thickness) below the 7 year mean, in a broad region in lower La Plata. GRACE measurements are consistent with accumulated precipitation data from satellite remote sensing and with vegetation index changes derived from Terra satellite observations. The Global Land Data Assimilation System model captures the drought event but underestimates its intensity. Limited available groundwater‐level data in southern La Plata show significant groundwater depletion, which is likely associated with the drought in this region. GRACE‐observed TWS change and precipitation anomalies in the studied region appear to closely correlate with the ENSO climate index, with dry and wet seasons corresponding to La Niña and El Niño events, respectively.

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[SDU.STU.GP] Sciences of the Universe/Earth Sciences/Geophysics, [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph], [PHYS.PHYS.PHYS-GEO-PH] Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph], [SDE.MCG]Environmental Sciences/Global Changes, [PHYS.PHYS.PHYS-GEO-PH] Physics/Physics/Geophysics, ENVI] Planète et Univers/Interfaces continentales, environnement [[SDU], FOS: Physical sciences, [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph], STU:HY] Sciences of the Universe/Earth Sciences/Hydrology [[SDU], [SDU.STU.ME]Sciences of the Universe [physics]/Earth Sciences/Meteorology, [SDU.ENVI] Sciences of the Universe/Continental interfaces, environment, STU:HY] Planète et Univers/Sciences de la Terre/Hydrologie [[SDU], Physics - Geophysics, [ SDU.STU.GP ] Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph], [ PHYS.PHYS.PHYS-GEO-PH ] Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph], STU:GP] Sciences of the Universe/Earth Sciences/Geophysics [[SDU], [SDU.STU.ME] Sciences of the Universe/Earth Sciences/Meteorology, [ SDU.ENVI ] Sciences of the Universe [physics]/Continental interfaces, environment, MCG] Environmental Sciences/Global Changes [[SDE], [SDU.STU.HY] Sciences of the Universe/Earth Sciences/Hydrology, ENVI] Sciences of the Universe/Continental interfaces, environment [[SDU], [SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology, [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment, STU:ME] Sciences of the Universe/Earth Sciences/Meteorology [[SDU], STU:ME] Planète et Univers/Sciences de la Terre/Météorologie [[SDU], [SDU.STU.ME] Sciences of the Universe [physics]/Earth Sciences/Meteorology, [ SDU.STU.ME ] Sciences of the Universe [physics]/Earth Sciences/Meteorology, [SDU.ENVI] Sciences of the Universe [physics]/Continental interfaces, environment, Geophysics (physics.geo-ph), [ SDE.MCG ] Environmental Sciences/Global Changes, [SDE.MCG] Environmental Sciences/Global Changes, STU:GP] Planète et Univers/Sciences de la Terre/Géophysique [[SDU], MCG] Sciences de l'environnement/Milieux et Changements globaux [[SDE], [SDU.STU.HY] Sciences of the Universe [physics]/Earth Sciences/Hydrology, PHYS:PHYS_GEO-PH] Physics/Physics/Geophysics [[PHYS], [SDU.STU.GP] Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph], [ SDU.STU.HY ] Sciences of the Universe [physics]/Earth Sciences/Hydrology, PHYS:PHYS_GEO-PH] Physique/Physique/Géophysique [[PHYS]

  • BIP!
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    		 95
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    		 Top 10%
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    		 Top 10%
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
95
Top 10%
Top 10%
Top 10%
Green
bronze
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