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Energy exchange between the atmosphere and a meadow ecosystem on the Qinghai-Tibetan Plateau
文献类型：期刊论文
| 作者 | Gu, S; Tang, YH; Cui, XY; Kato, T; Du, MY; Li, YN; Zhao, XQ |
| 刊名 | agricultural and forest meteorology
 |
| 出版日期 | 2005-04-30 |
| 卷号 | 129期号:3-4页码:175-185 |
| 关键词 | albedo Bowen ratio Eddy covariance energy balance soil water content |
| 合作状况 | 其它 |
| 中文摘要 | to reveal the potential contribution of grassland ecosystems to climate change, we examined the energy exchange over an alpine kobresia meadow on the northeastern qinghai-tibetan plateau. the annual pattern of energy exchange showed a clear distinction between periods of frozen soil with the daily mean soil temperature at 5 cm (t-s5 ≤ 0 ° c) and non-frozen soil (t-s5 > 0 ° c). more than 80% of net radiation was converted to sensible heat (h) during the frozen soil period, but h varied considerably with the change in vegetation during the non-frozen soil period. three different sub-periods were further distinguished for the later period: (1) the pre-growth period with bowen ratio (β) > 1 was characterized by a high β of 3.0 in average and the rapid increase of net radiation associated with the increases of h, latent heat (le) and soil heat; (2) during the growth period when β ≤ 1, the le was high but h fluxes was low with β changing between 0.3 and 0.4; (3) the post-growth period with average β of 3.6 when h increased again and reached a second maximum around early october. the seasonal pattern suggests that the phenology of the vegetation and the soil water content were the major factors affecting the energy partitioning in the alpine meadow ecosystem. © 2005 elsevier b.v. all rights reserved. |
| 英文摘要 | to reveal the potential contribution of grassland ecosystems to climate change, we examined the energy exchange over an alpine kobresia meadow on the northeastern qinghai-tibetan plateau. the annual pattern of energy exchange showed a clear distinction between periods of frozen soil with the daily mean soil temperature at 5 cm (t-s5 ≤ 0 ° c) and non-frozen soil (t-s5 > 0 ° c). more than 80% of net radiation was converted to sensible heat (h) during the frozen soil period, but h varied considerably with the change in vegetation during the non-frozen soil period. three different sub-periods were further distinguished for the later period: (1) the pre-growth period with bowen ratio (β) > 1 was characterized by a high β of 3.0 in average and the rapid increase of net radiation associated with the increases of h, latent heat (le) and soil heat; (2) during the growth period when β ≤ 1, the le was high but h fluxes was low with β changing between 0.3 and 0.4; (3) the post-growth period with average β of 3.6 when h increased again and reached a second maximum around early october. the seasonal pattern suggests that the phenology of the vegetation and the soil water content were the major factors affecting the energy partitioning in the alpine meadow ecosystem. © 2005 elsevier b.v. all rights reserved. |
| WOS标题词 | science & technology ; life sciences & biomedicine ; physical sciences |
| 学科主题 | 农业科学 |
| 类目[WOS] | agronomy ; forestry ; meteorology & atmospheric sciences |
| 研究领域[WOS] | agriculture ; forestry ; meteorology & atmospheric sciences |
| 关键词[WOS] | balance closure ; surface ; fluxes ; carbon ; feedbacks |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000228813100005 |
| 公开日期 | 2009-12-09 |
| 源URL | [http://ir.nwipb.ac.cn/handle/363003/1374]  |
| 专题 | 西北高原生物研究所_中国科学院西北高原生物研究所 |
| 作者单位 | 1.Natl Inst Environm Studies, Tsukuba, Ibaraki 3058506, Japan 2.Chinese Acad Sci, NW Plateau Inst Biol, Xining 810001, Peoples R China 3.Univ Tsukuba, Tsukuba, Ibaraki 3058577, Japan 4.Natl Inst Agroenvironm Sci, Tsukuba, Ibaraki 3058604, Japan |
| 推荐引用方式 GB/T 7714 | Gu, S,Tang, YH,Cui, XY,et al. Energy exchange between the atmosphere and a meadow ecosystem on the Qinghai-Tibetan Plateau[J]. agricultural and forest meteorology,2005,129(3-4):175-185. |
| APA | Gu, S.,Tang, YH.,Cui, XY.,Kato, T.,Du, MY.,...&Zhao, XQ.(2005).Energy exchange between the atmosphere and a meadow ecosystem on the Qinghai-Tibetan Plateau.agricultural and forest meteorology,129(3-4),175-185. |
| MLA | Gu, S,et al."Energy exchange between the atmosphere and a meadow ecosystem on the Qinghai-Tibetan Plateau".agricultural and forest meteorology 129.3-4(2005):175-185. |
入库方式： OAI收割
来源：西北高原生物研究所
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