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| DOI | 10.5194/bg-11-6633-2014 |
| Pasture degradation modifies the water and carbon cycles of the Tibetan highlands | |
| Babel, W.; Biermann, T.; Coners, H.; Falge, E.; Seeber, E.; Ingrisch, J.; Schleuss, P. -M.; Gerken, T.; Leonbacher, J.; Leipold, T.; Willinghoefer, S.; Schuetzenmeister, K.; Shibistova, O.; Becker, L.; Hafner, S.; Spielvogel, S.; Li, X.; Xu, X.; Sun, Y.; Zhang, L.; Yang, Y.; Ma, Y.; Wesche, K.; Graf, H. -F.; Leuschner, C.; Guggenberger, G.; Kuzyakov, Y.; Miehe, G.; Foken, T. | |
| 通讯作者 | Foken, T (通讯作者) |
| 发表日期 | 2014 |
| ISSN | 1726-4170 |
| EISSN | 1726-4189 |
| 起始页码 | 6633 |
| 结束页码 | 6656 |
| 卷号 | 11期号:23 |
| 英文摘要 | The Tibetan Plateau has a significant role with regard to atmospheric circulation and the monsoon in particular. Changes between a closed plant cover and open bare soil are one of the striking effects of land use degradation observed with unsustainable range management or climate change, but experiments investigating changes of surface properties and processes together with atmospheric feedbacks are rare and have not been undertaken in the world's two largest alpine ecosystems, the alpine steppe and the Kobresia pygmaea pastures of the Tibetan Plateau. We connected measurements of micro-lysimeter, chamber, C-13 labelling, and eddy covariance and combined the observations with land surface and atmospheric models, adapted to the highland conditions. This allowed us to analyse how three degradation stages affect the water and carbon cycle of pastures on the landscape scale within the core region of the Kobresia pygmaea ecosystem. The study revealed that increasing degradation of the Kobresia turf affects carbon allocation and strongly reduces the carbon uptake, compromising the function of Kobresia pastures as a carbon sink. Pasture degradation leads to a shift from transpiration to evaporation while a change in the sum of evapotranspiration over a longer period cannot be confirmed. The results show an earlier onset of convection and cloud generation, likely triggered by a shift in evapotranspiration timing when dominated by evaporation. Consequently, precipitation starts earlier and clouds decrease the incoming solar radiation. In summary, the changes in surface properties by pasture degradation found on the highland have a significant influence on larger scales. |
| 关键词 | EDDY-COVARIANCE MEASUREMENTSENERGY-BALANCE CLOSURECO LAKE BASINNAM COSURFACE-ENERGYHETEROGENEOUS LANDSCAPEGRASSLAND ECOSYSTEMSQUALITY ASSESSMENTSOIL-TEMPERATUREBOUNDARY-LAYER |
| 语种 | 英语 |
| WOS研究方向 | Environmental Sciences & Ecology ; Geology |
| WOS类目 | Ecology ; Geosciences, Multidisciplinary |
| WOS记录号 | WOS:000346357100009 |
| 来源期刊 | BIOGEOSCIENCES
 |
| 来源机构 | 中国科学院青藏高原研究所 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/258413 |
| 推荐引用方式 GB/T 7714 | Babel, W.,Biermann, T.,Coners, H.,et al. Pasture degradation modifies the water and carbon cycles of the Tibetan highlands[J]. 中国科学院青藏高原研究所,2014,11(23). |
| APA | Babel, W..,Biermann, T..,Coners, H..,Falge, E..,Seeber, E..,...&Foken, T..(2014).Pasture degradation modifies the water and carbon cycles of the Tibetan highlands.BIOGEOSCIENCES,11(23). |
| MLA | Babel, W.,et al."Pasture degradation modifies the water and carbon cycles of the Tibetan highlands".BIOGEOSCIENCES 11.23(2014). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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