Energy flux partitioning and evapotranspiration in a sub‐alpine spruce forest ecosystem
Abstract In this study, we examined the year 2011 characteristics of energy flux partitioning and evapotranspiration of a sub‐alpine spruce forest underlain by permafrost on the Qinghai–Tibet Plateau (QPT). Energy balance closure on a half‐hourly basis was H + λE = 0.81 × ( R n − G − S ) + 3.48 (W m...
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crwiley:10.1002/hyp.9995 2024-06-23T07:56:09+00:00 Energy flux partitioning and evapotranspiration in a sub‐alpine spruce forest ecosystem Gaofeng, Zhu Ling, Lu Yonghong, Su Xufeng, Wang Xia, Cui Jinzhu, Ma Jianhua, He Kun, Zhang Changbin, Li 2013 http://dx.doi.org/10.1002/hyp.9995 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fhyp.9995 https://onlinelibrary.wiley.com/doi/pdf/10.1002/hyp.9995 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Hydrological Processes volume 28, issue 19, page 5093-5104 ISSN 0885-6087 1099-1085 journal-article 2013 crwiley https://doi.org/10.1002/hyp.9995 2024-06-11T04:46:24Z Abstract In this study, we examined the year 2011 characteristics of energy flux partitioning and evapotranspiration of a sub‐alpine spruce forest underlain by permafrost on the Qinghai–Tibet Plateau (QPT). Energy balance closure on a half‐hourly basis was H + λE = 0.81 × ( R n − G − S ) + 3.48 (W m −2 ) ( r 2 = 0.83, n = 14938), where H , λE , R n , G and S are the sensible heat, latent heat, net radiation, soil heat and air‐column heat storage fluxes, respectively. Maximum H was higher than maximum λE , and H dominated the energy budget at midday during the whole year, even in summer time. However, the rainfall events significantly affected energy flux partitioning and evapotranspiration. The mean value of evaporative fraction (Λ = λE /( λE + H )) during the growth period on zero precipitation days and non‐zero precipitation days was 0.40 and 0.61, respectively. The mean daily evapotranspiration of this sub‐alpine forest during summer time was 2.56 mm day −1 . The annual evapotranspiration and sublimation was 417 ± 8 mm year −1 , which was very similar to the annual precipitation of 428 mm. Sublimation accounted for 7.1% (30 ± 2 mm year −1 ) of annual evapotranspiration and sublimation, indicating that the sublimation is not negligible in the annual water balance in sub‐alpine forests on the QPT. The low values of the Priestley–Taylor coefficient ( α ) and the very low value of the decoupling coefficient (Ω) during most of the growing season suggested low soil water content and conservative water loss in this sub‐alpine forest. Copyright © 2013 John Wiley & Sons, Ltd. Article in Journal/Newspaper permafrost Wiley Online Library Priestley ENVELOPE(161.883,161.883,-75.183,-75.183) Hydrological Processes 28 19 5093 5104 |
institution |
Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract In this study, we examined the year 2011 characteristics of energy flux partitioning and evapotranspiration of a sub‐alpine spruce forest underlain by permafrost on the Qinghai–Tibet Plateau (QPT). Energy balance closure on a half‐hourly basis was H + λE = 0.81 × ( R n − G − S ) + 3.48 (W m −2 ) ( r 2 = 0.83, n = 14938), where H , λE , R n , G and S are the sensible heat, latent heat, net radiation, soil heat and air‐column heat storage fluxes, respectively. Maximum H was higher than maximum λE , and H dominated the energy budget at midday during the whole year, even in summer time. However, the rainfall events significantly affected energy flux partitioning and evapotranspiration. The mean value of evaporative fraction (Λ = λE /( λE + H )) during the growth period on zero precipitation days and non‐zero precipitation days was 0.40 and 0.61, respectively. The mean daily evapotranspiration of this sub‐alpine forest during summer time was 2.56 mm day −1 . The annual evapotranspiration and sublimation was 417 ± 8 mm year −1 , which was very similar to the annual precipitation of 428 mm. Sublimation accounted for 7.1% (30 ± 2 mm year −1 ) of annual evapotranspiration and sublimation, indicating that the sublimation is not negligible in the annual water balance in sub‐alpine forests on the QPT. The low values of the Priestley–Taylor coefficient ( α ) and the very low value of the decoupling coefficient (Ω) during most of the growing season suggested low soil water content and conservative water loss in this sub‐alpine forest. Copyright © 2013 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Gaofeng, Zhu Ling, Lu Yonghong, Su Xufeng, Wang Xia, Cui Jinzhu, Ma Jianhua, He Kun, Zhang Changbin, Li |
spellingShingle |
Gaofeng, Zhu Ling, Lu Yonghong, Su Xufeng, Wang Xia, Cui Jinzhu, Ma Jianhua, He Kun, Zhang Changbin, Li Energy flux partitioning and evapotranspiration in a sub‐alpine spruce forest ecosystem |
author_facet |
Gaofeng, Zhu Ling, Lu Yonghong, Su Xufeng, Wang Xia, Cui Jinzhu, Ma Jianhua, He Kun, Zhang Changbin, Li |
author_sort |
Gaofeng, Zhu |
title |
Energy flux partitioning and evapotranspiration in a sub‐alpine spruce forest ecosystem |
title_short |
Energy flux partitioning and evapotranspiration in a sub‐alpine spruce forest ecosystem |
title_full |
Energy flux partitioning and evapotranspiration in a sub‐alpine spruce forest ecosystem |
title_fullStr |
Energy flux partitioning and evapotranspiration in a sub‐alpine spruce forest ecosystem |
title_full_unstemmed |
Energy flux partitioning and evapotranspiration in a sub‐alpine spruce forest ecosystem |
title_sort |
energy flux partitioning and evapotranspiration in a sub‐alpine spruce forest ecosystem |
publisher |
Wiley |
publishDate |
2013 |
url |
http://dx.doi.org/10.1002/hyp.9995 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fhyp.9995 https://onlinelibrary.wiley.com/doi/pdf/10.1002/hyp.9995 |
long_lat |
ENVELOPE(161.883,161.883,-75.183,-75.183) |
geographic |
Priestley |
geographic_facet |
Priestley |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
Hydrological Processes volume 28, issue 19, page 5093-5104 ISSN 0885-6087 1099-1085 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/hyp.9995 |
container_title |
Hydrological Processes |
container_volume |
28 |
container_issue |
19 |
container_start_page |
5093 |
op_container_end_page |
5104 |
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1802649046967386112 |