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题名: Energy flux partitioning and evapotranspiration in a sub-alpine spruce forest ecosystem
作者: Zhu, GF(朱高峰); Lu, L(鲁蕾); Su, YH; Wang, XF; Cui, X; Ma, JZ(马金珠); He, JH(何建华); Zhang, K; Li, CB(李常斌)
收录类别: SCIE ; EI
出版日期: 2014-09-15
刊名: HYDROLOGICAL PROCESSES
卷号: 28, 期号:19, 页码:5093-5104
出版者: WILEY
出版地: HOBOKEN
英文摘要: 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+lambda E = 0.81 x (R-n - G - S) + 3.48 (Wm(-2)) (r(2) = 0.83, n = 14938), where H, lambda E, 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 lambda E, 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 (Lambda=lambda E/(lambda E + 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 2.56mmday(-1). The annual evapotranspiration and sublimation was 417 +/- 8mm year(-1), which was very similar to the annual precipitation of 428 mm. Sublimation accounted for 7.1% (30 +/- 2mm 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 (alpha) and the very low value of the decoupling coefficient (Omega) during most of the growing season suggested low soil water content and conservative water loss in this sub-alpine forest. Copyright (C) 2013 John Wiley & Sons, Ltd.
关键词: energy flux partitioning ; evapotranspiration ; Qinghai spruce ; permafrost ; Qinghai-Tibet plateau ; sublimation ; decoupling coefficient
作者部门: [Zhu Gaofeng ; Cui Xia ; Ma Jinzhu ; He Jianhua ; Zhang Kun ; Li Changbin] Lanzhou Univ, Minist Educ, Key Lab Western Chinas Environm Syst, Collaborat Innovat Ctr Arid Environm & Climate Ch, Lanzhou 730000, Gansu, Peoples R China ; [Lu Ling ; Su Yonghong] Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Div Hydrol Water Land Res Cold & Arid Reg, Lanzhou, Peoples R China ; [Wang Xufeng] Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Lab Remote Sensing & Geospatial Sci, Lanzhou, Peoples R China
通讯作者: Zhu, GF (reprint author), Lanzhou Univ, Minist Educ, Key Lab Western Chinas Environm Syst, Tianshui Rd 222, Lanzhou 730000, Gansu, Peoples R China.
学科分类: Water Resources
文章类型: Article
所属项目编号: Fundamental Research Funds for the Central Universities [lzujbky-2013-m02, lzujbky-2013-k19] ; National Natural Science Foundation of China [41001242] ; New Century Excellent Talents in University of Chinese Ministry of Education [NCET-11-0219]
所属项目名称: 国家自然科学基金项目 ; 新世纪优秀人才支持计划 ; 中央高校基本科研业务费专项资金
项目资助者: NSFC ; MOE ; LZU
语种: 英语
DOI: 10.1002/hyp.9995
ISSN号: 0885-6087
WOS记录号: WOS:000340893500008
EI记录号: 20143518103471
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/120484
Appears in Collections:资源环境学院_期刊论文

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Recommended Citation:
Zhu, GF,Lu, L,Su, YH,et al. Energy flux partitioning and evapotranspiration in a sub-alpine spruce forest ecosystem[J]. HYDROLOGICAL PROCESSES,2014,28(19):5093-5104.
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