Characterizing evapotranspiration over a meadow ecosystem on the Qinghai-Tibetan Plateau

NWIPB OpenIR

	Characterizing evapotranspiration over a meadow ecosystem on the Qinghai-Tibetan Plateau
	Gu, Song ; Tang, Yanhong ; Cui, Xiaoyong ; Du, Mingyuan ; Zhao, Liang ; Li, Yingnian ; Xu, Shixiao ; Zhou, Huakun ; Kato, Tomomichi ; Qi, Peitong ; Zhao, Xinquan
	2008-04-29
发表期刊	JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES ; Gu Song, Tang Yanhong,Cui Xiaoyong, Du Mingyuan,Zhao Liang,Li Yingnian, Xu Shixiao,Zhou Huakun,Kato Tomomichi,Qi Peitong,Zhao Xinquan.Characterizing evapotranspiration over a meadow ecosystem on the Qinghai-Tibetan Plateau.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2008,113(D8):
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.
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/30342
专题	中国科学院西北高原生物研究所
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, Gu Song, Tang Yanhong,Cui Xiaoyong, Du Mingyuan,Zhao Liang,Li Yingnian, Xu Shixiao,Zhou Huakun,Kato Tomomichi,Qi Peitong,Zhao Xinquan.Characterizing evapotranspiration over a meadow ecosystem on the Qinghai-Tibetan Plateau.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2008,113(D8):,2008.
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.
MLA	Gu, Song,et al."Characterizing evapotranspiration over a meadow ecosystem on the Qinghai-Tibetan Plateau".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES (2008).