AustralieFrV1, Main, Exploration, bibRecord, 000022

A Comparative Study of GRACE with Continental Evapotranspiration Estimates in Australian Semi-Arid and Arid Basins: Sensitivity to Climate Variability and Extremes

Identifieur interne : 000022 ( Main/Exploration ); précédent : 000021; suivant : 000023

A Comparative Study of GRACE with Continental Evapotranspiration Estimates in Australian Semi-Arid and Arid Basins: Sensitivity to Climate Variability and Extremes

Auteurs : Hong Shen [Australie] ; Marc Leblanc [France] ; Frédéric Frappart [France] ; Lucia Seoane [France] ; Damien O Rady [Australie] ; Albert Olioso [France] ; Sarah Tweed [France]

Source :

Water [ 2073-4441 ] ; 2017.

RBID : Hal:hal-01610652

Descripteurs français

mix :
- australie, bilan hydrique, bilan énergétique, donnée spatiale, modèle de surface, valeur extrême, variabilité climatique, évapotranspiration.

English descriptors

mix :
- land surface model, Australia , GRACE, energy balance, extreme value, water balance.

Abstract

This study examines the dynamics and robustness of large-scale evapotranspiration products in water-limited environments. Four types of ET products are tested against rainfall in two large semi-arid to arid Australian basins from 2003 to 2010: two energy balance ET methods which are forced by optical satellite retrievals from MODIS; a newly developed land surface model (AWRA); and one approach based on observations from the Gravity Recovery and Climate Experiment (GRACE) and rainfall data. The two basins are quasi (Murray-Darling Basin: 1.06 million km2) and completely (Lake Eyre Basin: 1.14 million km2) endorheic. During the study period, two extreme climatic events—the Millennium drought and the strongest La Niña event—were recorded in the basins and are used in our assessment. The two remotely-sensed ET products constrained by the energy balance tended to overestimate ET flux over water-stressed regions. They had low sensitivity to climatic extremes and poor capability to close the water balance. However, these two remotely-sensed and energy balance products demonstrated their superiority in capturing spatial features including over small-scale and complicated landscapes. AWRA and GRACE formulated in the water balance framework were more sensitive to rainfall variability and yielded more realistic ET estimates during climate extremes. GRACE demonstrated its ability to account for seasonal and inter-annual change in water storage for ET evaluation.

Url:

https://hal.archives-ouvertes.fr/hal-01610652

DOI: 10.3390/w9090614

Affiliations:

Links toward previous steps (curation, corpus...)

to stream Hal, to step Corpus: 000019
to stream Hal, to step Curation: 000019
to stream Hal, to step Checkpoint: 000023
to stream Main, to step Merge: 000017
to stream Main, to step Curation: 000022

Le document en format XML

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          <date type="start">2015-02-06</date>
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            </address>
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<tutelle active="#struct-302069" type="direct"><org type="institution" xml:id="struct-302069" status="VALID">          <orgName>Centre International des Hautes Études Agronomiques Méditerranéennes</orgName>
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<country>France</country>
</affiliation>
</author>
</analytic>
<idno type="DOI">10.3390/w9090614</idno>
<series><title level="j">Water</title>
<idno type="ISSN">2073-4441</idno>
<imprint><date type="datePub">2017</date>
</imprint>
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<profileDesc><textClass><keywords scheme="mix" xml:lang="en"><term> land surface model</term>
<term>Australia </term>
<term>GRACE</term>
<term>energy balance</term>
<term>extreme value</term>
<term>water balance</term>
</keywords>
<keywords scheme="mix" xml:lang="fr"><term>australie</term>
<term>bilan hydrique</term>
<term>bilan énergétique</term>
<term>donnée spatiale</term>
<term>modèle de surface</term>
<term>valeur extrême</term>
<term>variabilité climatique</term>
<term>évapotranspiration</term>
</keywords>
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<front><div type="abstract" xml:lang="en">This study examines the dynamics and robustness of large-scale evapotranspiration products in water-limited environments. Four types of ET products are tested against rainfall in two large semi-arid to arid Australian basins from 2003 to 2010: two energy balance ET methods which are forced by optical satellite retrievals from MODIS; a newly developed land surface model (AWRA); and one approach based on observations from the Gravity Recovery and Climate Experiment (GRACE) and rainfall data. The two basins are quasi (Murray-Darling Basin: 1.06 million km2) and completely (Lake Eyre Basin: 1.14 million km2) endorheic. During the study period, two extreme climatic events—the Millennium drought and the strongest La Niña event—were recorded in the basins and are used in our assessment. The two remotely-sensed ET products constrained by the energy balance tended to overestimate ET flux over water-stressed regions. They had low sensitivity to climatic extremes and poor capability to close the water balance. However, these two remotely-sensed and energy balance products demonstrated their superiority in capturing spatial features including over small-scale and complicated landscapes. AWRA and GRACE formulated in the water balance framework were more sensitive to rainfall variability and yielded more realistic ET estimates during climate extremes. GRACE demonstrated its ability to account for seasonal and inter-annual change in water storage for ET evaluation.</div>
</front>
</TEI>
<affiliations><list><country><li>Australie</li>
<li>France</li>
</country>
<region><li>Provence-Alpes-Côte d'Azur</li>
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<settlement><li>Avignon</li>
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<orgName><li>Université d'Avignon</li>
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<tree><country name="Australie"><noRegion><name sortKey="Shen, Hong" sort="Shen, Hong" uniqKey="Shen H" first="Hong" last="Shen">Hong Shen</name>
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<name sortKey="O Rady, Damien" sort="O Rady, Damien" uniqKey="O Rady D" first="Damien" last="O Rady">Damien O Rady</name>
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<country name="France"><region name="Provence-Alpes-Côte d'Azur"><name sortKey="Leblanc, Marc" sort="Leblanc, Marc" uniqKey="Leblanc M" first="Marc" last="Leblanc">Marc Leblanc</name>
</region>
<name sortKey="Frappart, Frederic" sort="Frappart, Frederic" uniqKey="Frappart F" first="Frédéric" last="Frappart">Frédéric Frappart</name>
<name sortKey="Olioso, Albert" sort="Olioso, Albert" uniqKey="Olioso A" first="Albert" last="Olioso">Albert Olioso</name>
<name sortKey="Seoane, Lucia" sort="Seoane, Lucia" uniqKey="Seoane L" first="Lucia" last="Seoane">Lucia Seoane</name>
<name sortKey="Tweed, Sarah" sort="Tweed, Sarah" uniqKey="Tweed S" first="Sarah" last="Tweed">Sarah Tweed</name>
</country>
</tree>
</affiliations>
</record>

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A Comparative Study of GRACE with Continental Evapotranspiration Estimates in Australian Semi-Arid and Arid Basins: Sensitivity to Climate Variability and Extremes

A Comparative Study of GRACE with Continental Evapotranspiration Estimates in Australian Semi-Arid and Arid Basins: Sensitivity to Climate Variability and Extremes

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