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DOI10.1111/gcb.12277
The impacts of climate change and human activities on biogeochemical cycles on the Qinghai-Tibetan Plateau
Chen, Huai; Zhu, Qiuan; Peng, Changhui; Wu, Ning; Wang, Yanfen; Fang, Xiuqing; Gao, Yongheng; Zhu, Dan; Yang, Gang; Tian, Jianqing; Kang, Xiaoming; Piao, Shilong; Ouyang, Hua; Xiang, Wenhua; Luo, Zhibin; Jiang, Hong; Song, Xingzhang; Zhang, Yao; Yu, Guirui; Zhao, Xinquan; Gong, Peng; Yao, Tandong; Wu, Jianghua
发表日期2013
ISSN1354-1013
卷号19期号:10页码:2940-2955
英文摘要

With a pace of about twice the observed rate of global warming, the temperature on the Qinghai-Tibetan Plateau (Earth‘s third pole‘) has increased by 0.2 degrees C per decade over the past 50years, which results in significant permafrost thawing and glacier retreat. Our review suggested that warming enhanced net primary production and soil respiration, decreased methane (CH4) emissions from wetlands and increased CH4 consumption of meadows, but might increase CH4 emissions from lakes. Warming-induced permafrost thawing and glaciers melting would also result in substantial emission of old carbon dioxide (CO2) and CH4. Nitrous oxide (N2O) emission was not stimulated by warming itself, but might be slightly enhanced by wetting. However, there are many uncertainties in such biogeochemical cycles under climate change. Human activities (e.g. grazing, land cover changes) further modified the biogeochemical cycles and amplified such uncertainties on the plateau. If the projected warming and wetting continues, the future biogeochemical cycles will be more complicated. So facing research in this field is an ongoing challenge of integrating field observations with process-based ecosystem models to predict the impacts of future climate change and human activities at various temporal and spatial scales. To reduce the uncertainties and to improve the precision of the predictions of the impacts of climate change and human activities on biogeochemical cycles, efforts should focus on conducting more field observation studies, integrating data within improved models, and developing new knowledge about coupling among carbon, nitrogen, and phosphorus biogeochemical cycles as well as about the role of microbes in these cycles.


英文关键词carbon budget;ice retreat;intact ecosystems;land use change;permafrost
语种英语
WOS研究方向Biodiversity & Conservation ; Environmental Sciences & Ecology
WOS类目Biodiversity Conservation ; Ecology ; Environmental Sciences
WOS记录号WOS:000323844200003
来源期刊GLOBAL CHANGE BIOLOGY
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/487
推荐引用方式
GB/T 7714
Chen, Huai,Zhu, Qiuan,Peng, Changhui,et al. The impacts of climate change and human activities on biogeochemical cycles on the Qinghai-Tibetan Plateau[J]. 中国科学院青藏高原研究所,2013,19(10):2940-2955.
APA Chen, Huai.,Zhu, Qiuan.,Peng, Changhui.,Wu, Ning.,Wang, Yanfen.,...&Wu, Jianghua.(2013).The impacts of climate change and human activities on biogeochemical cycles on the Qinghai-Tibetan Plateau.GLOBAL CHANGE BIOLOGY,19(10),2940-2955.
MLA Chen, Huai,et al."The impacts of climate change and human activities on biogeochemical cycles on the Qinghai-Tibetan Plateau".GLOBAL CHANGE BIOLOGY 19.10(2013):2940-2955.
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