Knowledge Management System of Northwest Institute of Plateau Biology, CAS
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 | |
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). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论