Pasture degradation modifies the water and carbon cycles of the Tibetan highlands
文献类型：期刊论文
| 作者 | Babel, W.1; Biermann, T.1; Coners, H.2; Falge, E.1; Seeber, E.3; Ingrisch, J.4; Schleuss, P. -M.4; Gerken, T.1,5; Leonbacher, J.1; Leipold, T.1 |
| 刊名 | BIOGEOSCIENCES
 |
| 出版日期 | 2014 |
| 卷号 | 11期号:23页码:6633-6656 |
| 文献子类 | Article |
| 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. |
| WOS关键词 | EDDY-COVARIANCE MEASUREMENTS ; ENERGY-BALANCE CLOSURE ; CO LAKE BASIN ; NAM CO ; HETEROGENEOUS LANDSCAPE ; GRASSLAND ECOSYSTEMS ; SURFACE-ENERGY ; QUALITY ASSESSMENT ; SOIL-TEMPERATURE ; BOUNDARY-LAYER |
| 语种 | 英语 |
| WOS记录号 | WOS:000346357100009 |
| 出版者 | COPERNICUS GESELLSCHAFT MBH |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/68471]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Foken, T. |
| 作者单位 | 1.Univ Bayreuth, Dept Micrometeorol, Bayreuth, Germany 2.Univ Gottingen, Dept Plant Ecol & Ecosyst Res, D-37073 Gottingen, Germany 3.Senckenberg Museum Gorlitz, Dept Bot, Gorlitz, Germany 4.Univ Gottingen, Dept Soil Sci Temperate Ecosyst, D-37073 Gottingen, Germany 5.Univ Cambridge, Dept Geog, Ctr Atmospher Sci, Cambridge CB2 3EN, England 6.Univ Koblenz Landau, Inst Integrated Environm Sci, Koblenz, Germany 7.Leibniz Univ Hannover, Hannover, NH, Germany 8.VN Sukachev Inst Forest, Krasnoyarsk, Russia 9.Lanzhou Univ, Sch Life Sci, Lanzhou 730000, Peoples R China 10.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China |
| 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]. BIOGEOSCIENCES,2014,11(23):6633-6656. |
| 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),6633-6656. |
| MLA | Babel, W.,et al."Pasture degradation modifies the water and carbon cycles of the Tibetan highlands".BIOGEOSCIENCES 11.23(2014):6633-6656. |
入库方式： OAI收割
来源：地理科学与资源研究所
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