Forest Evapotranspiration and Energy Flux Partitioning Based on Eddy Covariance Methods in an Arid Desert Region of Northwest China

Ma, X; Feng, Q; Su, Y; Yu, T; Jin, H

Forest Evapotranspiration and Energy Flux Partitioning Based on Eddy Covariance Methods in an Arid Desert Region of Northwest China

Ma, X Feng, Q Su, Y Yu, T Jin, H

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Publisher:: Hindawi Limited
Publication Type:: Journal Article
Citation:: Advances in Meteorology, 2017, 2017, pp. 1-10
Issue Date:: 2017-01-01

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Field	Value	Language
dc.contributor.author	Ma, X
dc.contributor.author	Feng, Q
dc.contributor.author	Su, Y
dc.contributor.author	Yu, T
dc.contributor.author	Jin, H
dc.date.accessioned	2022-03-20T23:54:25Z
dc.date.available	2022-03-20T23:54:25Z
dc.date.issued	2017-01-01
dc.identifier.citation	Advances in Meteorology, 2017, 2017, pp. 1-10
dc.identifier.issn	1687-9309
dc.identifier.issn	1687-9317
dc.identifier.uri	http://hdl.handle.net/10453/155389
dc.description.abstract	<jats:p>In this study, the characteristics of energy flux partitioning and evapotranspiration of<jats:italic> P. euphratica</jats:italic> forests were examined in the extreme arid region of Northwest China. Energy balance closure of the ecosystem was approximately 72% (<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M1"><mml:mrow><mml:mi>H</mml:mi></mml:mrow></mml:math> + LE = 0.72 ∗ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M2"><mml:mo stretchy="false">(</mml:mo><mml:msub><mml:mrow><mml:mi>R</mml:mi></mml:mrow><mml:mrow><mml:mi>n</mml:mi></mml:mrow></mml:msub><mml:mtext>-</mml:mtext><mml:mi>G</mml:mi><mml:mo stretchy="false">)</mml:mo><mml:mo>+</mml:mo><mml:mn fontstyle="italic">7.72</mml:mn></mml:math>, <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M3"><mml:msup><mml:mrow><mml:mi>r</mml:mi></mml:mrow><mml:mrow><mml:mn fontstyle="italic">2</mml:mn></mml:mrow></mml:msup><mml:mo>=</mml:mo><mml:mn fontstyle="italic">0.79</mml:mn></mml:math>, <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M4"><mml:mi>n</mml:mi><mml:mo>=</mml:mo><mml:mn fontstyle="italic">12095</mml:mn></mml:math>), where <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M5"><mml:mrow><mml:msub><mml:mrow><mml:mi>R</mml:mi></mml:mrow><mml:mrow><mml:mi>n</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math> is the net radiation, <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M6"><mml:mrow><mml:mi>G</mml:mi></mml:mrow></mml:math> is the soil heat flux, <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M7"><mml:mrow><mml:mi>H</mml:mi></mml:mrow></mml:math> is the sensible heat flux, and LE is the latent heat flux. LE was the main term of energy consumption at annual time scale because of higher value in the growing season. The ratios of the latent (LE) and sensible (<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M8"><mml:mrow><mml:mi>H</mml:mi></mml:mrow></mml:math>) heat fluxes to net radiation were 0.47 and 0.28 throughout the year, respectively. Moreover, the yearly evapotranspiration of<jats:italic> P. euphratica</jats:italic> forests was 744 mm year<jats:sup>−1</jats:sup>. And the mean daily ET was 5.09 mm·d<jats:sup>−1</jats:sup> in the vibrant growing season. In particular, a small spike in the actual evapotranspiration distribution occurred during the soil ablation period due to the higher temperature and sufficient soil moisture associated with soil thawing. This period is accompanied by a series of physical processes, such as moisture transfer and heat exchange.</jats:p>
dc.language	en
dc.publisher	Hindawi Limited
dc.relation.ispartof	Advances in Meteorology
dc.relation.isbasedon	10.1155/2017/1619047
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	0401 Atmospheric Sciences
dc.title	Forest Evapotranspiration and Energy Flux Partitioning Based on Eddy Covariance Methods in an Arid Desert Region of Northwest China
dc.type	Journal Article
utslib.citation.volume	2017
utslib.for	0401 Atmospheric Sciences
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Life Sciences
utslib.copyright.status	open_access	*
dc.date.updated	2022-03-20T23:54:24Z
pubs.publication-status	Published
pubs.volume	2017

Abstract:

In this study, the characteristics of energy flux partitioning and evapotranspiration of P. euphratica forests were examined in the extreme arid region of Northwest China. Energy balance closure of the ecosystem was approximately 72% (H + LE = 0.72 ∗ (Rn-G)+7.72, r2=0.79, n=12095), where Rn is the net radiation, G is the soil heat flux, H is the sensible heat flux, and LE is the latent heat flux. LE was the main term of energy consumption at annual time scale because of higher value in the growing season. The ratios of the latent (LE) and sensible (H) heat fluxes to net radiation were 0.47 and 0.28 throughout the year, respectively. Moreover, the yearly evapotranspiration of P. euphratica forests was 744 mm year−1. And the mean daily ET was 5.09 mm·d−1 in the vibrant growing season. In particular, a small spike in the actual evapotranspiration distribution occurred during the soil ablation period due to the higher temperature and sufficient soil moisture associated with soil thawing. This period is accompanied by a series of physical processes, such as moisture transfer and heat exchange.

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http://hdl.handle.net/10453/155389