The impacts of climate change and human activities on biogeochemical cycles on the Qinghai-Tibetan Plateau

NWIPB OpenIR

	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 ; Peng, CH (reprint author), Northwest Agr & Forest Univ, Lab Ecol Forecasting & Global Change, Coll Forestry, Yangling 712100, Peoples R China.
	2013-10-01
发表期刊	GLOBAL CHANGE BIOLOGY ; Chen, H; Zhu, QA; Peng, CH; Wu, N; Wang, YF; Fang, XQ; Gao, YH; Zhu, D; Yang, G; Tian, JQ; Kang, XM; Piao, SL; Ouyang, H; Xiang, WH; Luo, ZB; Jiang, H; Song, XZ; Zhang, Y; Yu, GR; Zhao, XQ; Gong, P; Yao, TD; Wu, JH.The impacts of climate change and human activities on biogeochemical cycles on the Qinghai-Tibetan Plateau,GLOBAL CHANGE BIOLOGY,2013,19(10):2940-2955
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.; 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.
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/21793
专题	中国科学院西北高原生物研究所
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]. GLOBAL CHANGE BIOLOGY, Chen, H; Zhu, QA; Peng, CH; Wu, N; Wang, YF; Fang, XQ; Gao, YH; Zhu, D; Yang, G; Tian, JQ; Kang, XM; Piao, SL; Ouyang, H; Xiang, WH; Luo, ZB; Jiang, H; Song, XZ; Zhang, Y; Yu, GR; Zhao, XQ; Gong, P; Yao, TD; Wu, JH.The impacts of climate change and human activities on biogeochemical cycles on the Qinghai-Tibetan Plateau,GLOBAL CHANGE BIOLOGY,2013,19(10):2940-2955,2013.
APA	Chen, Huai.,Zhu, Qiuan.,Peng, Changhui.,Wu, Ning.,Wang, Yanfen.,...&Peng, CH .(2013).The impacts of climate change and human activities on biogeochemical cycles on the Qinghai-Tibetan Plateau.GLOBAL CHANGE BIOLOGY.
MLA	Chen, Huai,et al."The impacts of climate change and human activities on biogeochemical cycles on the Qinghai-Tibetan Plateau".GLOBAL CHANGE BIOLOGY (2013).