Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-5119-2017 |
Biophysical effects on the interannual variation in carbon dioxide exchange of an alpine meadow on the Tibetan Plateau | |
Wang, Lei1; Liu, Huizhi1; Sun, Jihua2; Shao, Yaping3 | |
2017-04-20 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:7 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; Germany |
英文摘要 | Eddy covariance measurements from 2012 to 2015 were used to investigate the interannual variation in carbon dioxide exchange and its control over an alpine meadow on the south-east margin of the Tibetan Plateau. The annual net ecosystem exchange (NEE) in the 4 years from 2012 to 2015 was -114.2, -158.5, -159.9 and -212.6 g Cm-2 yr(-1), and generally decreased with the mean annual air temperature (MAT). An exception occurred in 2014, which had the highest MAT. This was attributed to higher ecosystem respiration (RE) and similar gross primary production (GPP) in 2014 because the GPP increased with the MAT, but became saturated due to the limit in photosynthetic capacity. In the spring (March to May) of 2012, low air temperature (T-a) and drought events delayed grass germination and reduced GPP. In the late wet season (September to October) of 2012 and 2013, the low T-a in September and its negative effects on vegetation growth caused earlier grass senescence and significantly lower GPP. This indicates that the seasonal pattern of T-a has a substantial effect on the annual total GPP, which is consistent with results obtained using the homogeneity-of-slopes (HOS) model. The model results showed that the climatic seasonal variation explained 48.6% of the GPP variability, while the percentages explained by climatic interannual variation and the ecosystem functional change were 9.7 and 10.6 %, respectively. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000399794000001 |
WOS关键词 | ECOSYSTEM CO2 EXCHANGE ; SOUTHWEST CHINA ; TERM VARIATION ; FLUX ; GRASSLAND ; VARIABILITY ; TEMPERATURE ; CLIMATE ; RESPIRATION ; PRODUCTIVITY |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/30799 |
专题 | 地球科学 |
作者单位 | 1.Chinese Acad Sci, Inst Atmospher Phys, LAPC, Beijing 100029, Peoples R China; 2.Meteorol Observ Yunnan Prov, Kunming 650034, Peoples R China; 3.Univ Cologne, Inst Geophys & Meteorol, D-50937 Cologne, Germany |
推荐引用方式 GB/T 7714 | Wang, Lei,Liu, Huizhi,Sun, Jihua,et al. Biophysical effects on the interannual variation in carbon dioxide exchange of an alpine meadow on the Tibetan Plateau[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(7). |
APA | Wang, Lei,Liu, Huizhi,Sun, Jihua,&Shao, Yaping.(2017).Biophysical effects on the interannual variation in carbon dioxide exchange of an alpine meadow on the Tibetan Plateau.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(7). |
MLA | Wang, Lei,et al."Biophysical effects on the interannual variation in carbon dioxide exchange of an alpine meadow on the Tibetan Plateau".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.7(2017). |
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