Soil thermal regime alteration under experimental warming in permafrost regions of the central Tibetan Plateau
文献类型：期刊论文
| 作者 | Chen, Shengyun; Li, Xiangfei; Wu, Tonghua; Xue, Kai; Luo, Dongliang; Wang, Xiaoming; Wu, Qingbai; Kang, Shichang; Zhou, Huakun ; Wei, Dengxian
|
| 刊名 | GEODERMA
 |
| 出版日期 | 2020 |
| 卷号 | 372 |
| 关键词 | Soil thermodynamics Experimental warming Alpine grassland Tibetan Plateau |
| 英文摘要 | Soil thermal regime in permafrost regions is sensitive to climate change and may cause vast ecological consequences under future warming scenarios. However, there still lacks a systematic evaluation on the effect of warming on soil thermodynamics in the different ecosystems of permafrost regions. This study investigated the alterations of soil thermodynamics in alpine swamp meadow and alpine steppe under experimental warming by open-top chambers in permafrost regions of the central Tibetan Plateau. The results showed that air temperature increased significantly with an annual mean increase of 1.4 degrees C under warming. Compared to alpine swamp meadow, soil thermodynamics represented by soil temperature, soil thermal parameters, soil freeze-thaw process and active layer thickness in alpine steppe was more susceptible to warming. Specifically, soil temperature at 5-40 cm depths increased more in alpine steppe than alpine swamp meadow under warming, especially at topsoil (5-20 cm). Moreover, the increase in soil temperature at topsoil was greater during cold season than warm season. Greater alterations of soil thermal parameters were likely because soil moisture content reduced more in alpine steppe. Regarding soil freeze-thaw process, warming significantly postponed the onset of completely frozen stage and reduced the completely frozen days in alpine steppe. Active layer thickness in alpine steppe distinctly increased by 46 cm on average and showed an increasing trend under warming from 2009 to 2011. Overall, vegetation coverage and soil moisture content were responsible for the different responses of soil thermodynamics to experimental warming. The study has important implications for future scenarios as permafrost and grassland degradation may intensify under climate warming. |
| 源URL | [http://210.75.249.4/handle/363003/60286]  |
| 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 |
| 推荐引用方式 GB/T 7714 | Chen, Shengyun,Li, Xiangfei,Wu, Tonghua,et al. Soil thermal regime alteration under experimental warming in permafrost regions of the central Tibetan Plateau[J]. GEODERMA,2020,372. |
| APA | Chen, Shengyun.,Li, Xiangfei.,Wu, Tonghua.,Xue, Kai.,Luo, Dongliang.,...&Wei, Dengxian.(2020).Soil thermal regime alteration under experimental warming in permafrost regions of the central Tibetan Plateau.GEODERMA,372. |
| MLA | Chen, Shengyun,et al."Soil thermal regime alteration under experimental warming in permafrost regions of the central Tibetan Plateau".GEODERMA 372(2020). |
入库方式： OAI收割
来源：西北高原生物研究所
浏览0
下载0
收藏0
其他版本
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。