Synergistic effect of vegetation and air temperature changes on soil water content in alpine frost meadow soil in the permafrost region of Qinghai-Tibet
文献类型：期刊论文
| 作者 | Wang, Genxu1,2 ; Li, Yuanshou2; Hu, Hongchang3; Wang, Yibo3
|
| 刊名 | HYDROLOGICAL PROCESSES
 |
| 出版日期 | 2008-08-15 |
| 卷号 | 22期号:17页码:3310-3320 |
| 关键词 | permafrost soil water content alpine frost meadow vegetation cover temperature change |
| ISSN号 | 0885-6087 |
| 通讯作者 | Wang, Genxu |
| 英文摘要 | Seasonal changes over 2 years (2004-2006) in soil moisture content (0,,) of frozen alpine frost meadow soils of the Qinghai-Tibet plateau permafrost region under three different levels of vegetation cover were investigated. Vegetation cover and air temperature changes had significant effect (synergistic effect) on theta(v) and its distribution in the soil profile. During periods of soil freezing or thawing, the less the vegetation cover, the quicker the temperature drop or rise of soil water, and the shorter the duration of the soil water freeze-thaw response in the active soil layer. Under 30% and 65% vegetation cover the amplitude of variation in theta(v) during the freezing period was 20-26% greater than that under 93% cover, while during the thawing period, it was 1.5- to 40-5-fold greater. The freezing temperature of the Surface soil layer, (f)T(s), was 1.6 degrees C lower under 30% vegetation cover than under 93% vegetation cover. Changes in vegetation cover of the alpine frost meadow affected theta(v) and its distribution, as well as the relationship between theta(v) and soil temperature (T(s)). As vegetation cover decreased, soil water circulation in the active layer increased, and the response to temperature of the water distribution across the soil profile was heightened. The quantity of transitional soil phase water at different depths significantly increased as vegetation cover decreased. The influence of vegetation cover and soil temperature distribution led to a relatively dry soil layer in the middle of the profile (0.70-0.80 m) under high vegetation cover. Alpine meadow theta(v) and its pattern of distribution in the permafrost region were the result of the synergistic effect of air temperature and vegetation cover. Copyright (C) 2007 John Wiley & Soils, Ltd. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Water Resources |
| 研究领域[WOS] | Water Resources |
| 关键词[WOS] | PLATEAU ; HYDROLOGY ; ECOSYSTEM ; ALASKA |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000258519700008 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/10530]  |
| 专题 | 成都山地灾害与环境研究所_成都山地所知识仓储（2009年以前） 成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China 2.Chinese Acad Sci, Cryosphere Res Stn Cold & Arid Reg, Environm & Engn Res Inst, Lanzhou 730000, Peoples R China 3.Lanzhou Univ, Coll Resources & Environm, Lanzhou 730000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Genxu,Li, Yuanshou,Hu, Hongchang,et al. Synergistic effect of vegetation and air temperature changes on soil water content in alpine frost meadow soil in the permafrost region of Qinghai-Tibet[J]. HYDROLOGICAL PROCESSES,2008,22(17):3310-3320. |
| APA | Wang, Genxu,Li, Yuanshou,Hu, Hongchang,&Wang, Yibo.(2008).Synergistic effect of vegetation and air temperature changes on soil water content in alpine frost meadow soil in the permafrost region of Qinghai-Tibet.HYDROLOGICAL PROCESSES,22(17),3310-3320. |
| MLA | Wang, Genxu,et al."Synergistic effect of vegetation and air temperature changes on soil water content in alpine frost meadow soil in the permafrost region of Qinghai-Tibet".HYDROLOGICAL PROCESSES 22.17(2008):3310-3320. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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