NWIPB OpenIR
Characterizing evapotranspiration over a meadow ecosystem on the Qinghai-Tibetan Plateau
Gu, Song1,2,3; Tang, Yanhong3; Cui, Xiaoyong4; Du, Mingyuan5; Zhao, Liang; Li, Yingnian1; Xu, Shixiao1; Zhou, Huakun1; Kato, Tomomichi6; Qi, Peitong1; Zhao, Xinquan1
2008-04-29
发表期刊JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
卷号113期号:D8
文章类型Article
摘要To characterize evapotranspiration (ET) over grasslands on the Qinghai-Tibetan Plateau, we examined ET and its relevant environmental variables in a Kobresia meadow from 2002 to 2004 using the eddy covariance method. The annual precipitation changed greatly, with 554, 706, and 666 mm a(-1) for the three consecutive calendar years. The annual ET varied correspondingly to the annual precipitation with 341, 407, and 426 mm a(-1). The annual ET was, however, constant at about 60% of the annual precipitation. About 85% annual ET occurred during the growing season from May to September, and the averaged ET for this period was 1.90, 2.23, and 2.22 mm/d, respectively for the three consecutive years. The averaged ET was, however, very low (< 0.40 mm/d) during the nongrowing season from October to April. The annual canopy conductance (gc) and the Priestley-Taylor coefficient (a) showed the lowest values in the year with the lowest precipitation. This study first demonstrates that the alpine meadow ecosystem is characterized by a low ratio of annual ET to precipitation and that the interannual variation of ET is determined by annual precipitation.; To characterize evapotranspiration (ET) over grasslands on the Qinghai-Tibetan Plateau, we examined ET and its relevant environmental variables in a Kobresia meadow from 2002 to 2004 using the eddy covariance method. The annual precipitation changed greatly, with 554, 706, and 666 mm a(-1) for the three consecutive calendar years. The annual ET varied correspondingly to the annual precipitation with 341, 407, and 426 mm a(-1). The annual ET was, however, constant at about 60% of the annual precipitation. About 85% annual ET occurred during the growing season from May to September, and the averaged ET for this period was 1.90, 2.23, and 2.22 mm/d, respectively for the three consecutive years. The averaged ET was, however, very low (< 0.40 mm/d) during the nongrowing season from October to April. The annual canopy conductance (gc) and the Priestley-Taylor coefficient (a) showed the lowest values in the year with the lowest precipitation. This study first demonstrates that the alpine meadow ecosystem is characterized by a low ratio of annual ET to precipitation and that the interannual variation of ET is determined by annual precipitation.
关键词Carbon-dioxide Energy-balance Boreal Forest Water-vapor Environmental Controls Stomatal Conductance Temperate Grassland Arctic Tundra Exchange Evaporation
WOS标题词Science & Technology ; Physical Sciences
学科领域生物科学
关键词[WOS]CARBON-DIOXIDE ; ENERGY-BALANCE ; BOREAL FOREST ; WATER-VAPOR ; ENVIRONMENTAL CONTROLS ; STOMATAL CONDUCTANCE ; TEMPERATE GRASSLAND ; ARCTIC TUNDRA ; EXCHANGE ; EVAPORATION
收录类别SCI
语种英语
WOS研究方向Meteorology & Atmospheric Sciences
WOS类目Meteorology & Atmospheric Sciences
WOS记录号WOS:000255593800002
引用统计
被引频次:81[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://210.75.249.4/handle/363003/1218
专题中国科学院西北高原生物研究所
作者单位1.Chinese Acad Sci, NW Inst Plateau Biol, Xining, Peoples R China
2.Nankai Univ, Coll Life Sci, Tianjin 300071, Peoples R China
3.Natl Inst Environm Studies, Tsukuba, Ibaraki, Japan
4.Chinese Acad Sci, Coll Resources & Environm, Grad Sch, Beijing, Peoples R China
5.Natl Inst Agroenvironm Sci, Tsukuba, Ibaraki 305, Japan
6.Japan Agcy Marine Earth Sci & Technol, Frontier Res Ctr Global Change, Yokohama, Kanagawa, Japan
推荐引用方式
GB/T 7714
Gu, Song,Tang, Yanhong,Cui, Xiaoyong,et al. Characterizing evapotranspiration over a meadow ecosystem on the Qinghai-Tibetan Plateau[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2008,113(D8).
APA Gu, Song.,Tang, Yanhong.,Cui, Xiaoyong.,Du, Mingyuan.,Zhao, Liang.,...&Zhao, Xinquan.(2008).Characterizing evapotranspiration over a meadow ecosystem on the Qinghai-Tibetan Plateau.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,113(D8).
MLA Gu, Song,et al."Characterizing evapotranspiration over a meadow ecosystem on the Qinghai-Tibetan Plateau".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 113.D8(2008).
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