Multiyear precipitation reduction strongly decreases carbon uptake over northern China

	Multiyear precipitation reduction strongly decreases carbon uptake over northern China
	Yuan, Wenping ; Liu, Dan ; Dong, Wenjie ; Liu, Shuguang ; Zhou, Guangsheng ; Yu, Guirui ; Zhao, Tianbao ; Feng, Jinming ; Ma, Zhuguo ; Chen, Jiquan ; Chen, Yang ; Chen, Shiping ; Han, Shijie ; Huang, Jianping ; Li, Linghao ; Liu, Huizhi ; Liu, Shaoming ; Ma, Mingguo ; Wang, Yanfeng ; Xia, Jiangzhou ; Xu, Wenfang ; Zhang, Qiang ; Zhao, Xinquang ; Zhao, Liang
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES ; Yuan, WP; Liu, D; Dong, WJ; Liu, SG; Zhou, GS; Yu, GR; Zhao, TB; Feng, JM; Ma, ZG; Chen, JQ; Chen, Y; Chen, SP; Han, SJ; Huang, JP; Li, LH; Liu, HZ; Liu, SM; Ma, MG; Wang, YF; Xia, JZ; Xu, WF; Zhang, Q; Zhao, XQ; Zhao, L.Multiyear precipitation reduction strongly decreases carbon uptake over northern China,JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,2014,119(5):881
	2014-05-01
英文摘要	Drought has been a concern in global and regional water, carbon, and energy cycles. From 1999 to 2011, northern China experienced a multiyear precipitation reduction that significantly decreased water availability as indicated by the Palmer Drought Severity Index and soil moisture measurements. In this study, a light use efficiency model (EC-LUE) and an ecosystem physiological model (IBIS) were used to characterize the impacts of long-term drought on terrestrial carbon fluxes in northern China. EC-LUE and IBIS models showed the reduction of averaged GPP of 0.09 and 0.05 Pg C yr-1 during 1999-2011 compared with 1982-1998. Based on the IBIS model, simulated ecosystem respiration experienced an insignificant decrease from 1999 to 2011. The multiyear precipitation reduction changed the regional carbon uptake of 0.011 Pg C yr-1 from 1982 to 1998 to a net source of 0.018 Pg C yr-1 from 1999 to 2011. Moreover, a pronounced decrease in maize yield in almost all provinces in the study region was found from 1999 to 2011 versus the average of yield from1978 to 2011. The largest maize yield reduction occurred in Beijing (2499kgha-1yr-1), Jilin (2180kgha-1yr-1), Tianjing (1923kgha-1yr-1), and Heilongjiang (1791kgha-1yr-1), and the maize yield anomaly was significantly correlated with the annual precipitation over the entire study area. Our results revealed that recent climate change, especially drought-induced water stress, is the dominant cause of the reduction in the terrestrial carbon sink over northern China.; Drought has been a concern in global and regional water, carbon, and energy cycles. From 1999 to 2011, northern China experienced a multiyear precipitation reduction that significantly decreased water availability as indicated by the Palmer Drought Severity Index and soil moisture measurements. In this study, a light use efficiency model (EC-LUE) and an ecosystem physiological model (IBIS) were used to characterize the impacts of long-term drought on terrestrial carbon fluxes in northern China. EC-LUE and IBIS models showed the reduction of averaged GPP of 0.09 and 0.05 Pg C yr-1 during 1999-2011 compared with 1982-1998. Based on the IBIS model, simulated ecosystem respiration experienced an insignificant decrease from 1999 to 2011. The multiyear precipitation reduction changed the regional carbon uptake of 0.011 Pg C yr-1 from 1982 to 1998 to a net source of 0.018 Pg C yr-1 from 1999 to 2011. Moreover, a pronounced decrease in maize yield in almost all provinces in the study region was found from 1999 to 2011 versus the average of yield from1978 to 2011. The largest maize yield reduction occurred in Beijing (2499kgha-1yr-1), Jilin (2180kgha-1yr-1), Tianjing (1923kgha-1yr-1), and Heilongjiang (1791kgha-1yr-1), and the maize yield anomaly was significantly correlated with the annual precipitation over the entire study area. Our results revealed that recent climate change, especially drought-induced water stress, is the dominant cause of the reduction in the terrestrial carbon sink over northern China.
内容类型	期刊论文
源URL	[http://ir.nwipb.ac.cn/handle/363003/4234]
专题	西北高原生物研究所_中国科学院西北高原生物研究所
推荐引用方式 GB/T 7714	Yuan, Wenping,Liu, Dan,Dong, Wenjie,et al. Multiyear precipitation reduction strongly decreases carbon uptake over northern China[J]. JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES, Yuan, WP; Liu, D; Dong, WJ; Liu, SG; Zhou, GS; Yu, GR; Zhao, TB; Feng, JM; Ma, ZG; Chen, JQ; Chen, Y; Chen, SP; Han, SJ; Huang, JP; Li, LH; Liu, HZ; Liu, SM; Ma, MG; Wang, YF; Xia, JZ; Xu, WF; Zhang, Q; Zhao, XQ; Zhao, L.Multiyear precipitation reduction strongly decreases carbon uptake over northern China,JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,2014,119(5):881,2014.
APA	Yuan, Wenping.,Liu, Dan.,Dong, Wenjie.,Liu, Shuguang.,Zhou, Guangsheng.,...&Zhao, Liang.(2014).Multiyear precipitation reduction strongly decreases carbon uptake over northern China.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES.
MLA	Yuan, Wenping,et al."Multiyear precipitation reduction strongly decreases carbon uptake over northern China".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES (2014).