Multiyear precipitation reduction strongly decreases carbon uptake over northern China

	Multiyear precipitation reduction strongly decreases carbon uptake over northern China
	Yuan, Wenping 1; Liu, Dan 1; Dong, Wenjie 1; Liu, Shuguang 2; Zhou, Guangsheng 3,4; Yu, Guirui 5; Zhao, Tianbao 6; Feng, Jinming 1,6; Ma, Zhuguo 6; Chen, Jiquan 7
刊名	journal of geophysical research-biogeosciences
	2014-05-01
卷号	119 期号:5 页码:881-896
关键词	Drought Vegetation primary production Carbon uptake Northern China
ISSN号	2169-8953
中文摘要	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.
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.
WOS标题词	science & technology ; life sciences & biomedicine ; physical sciences
类目[WOS]	environmental sciences ; geosciences, multidisciplinary
研究领域[WOS]	environmental sciences & ecology ; geology
关键词[WOS]	drought-induced reduction ; climate-change ; soil-moisture ; vegetation dynamics ; modeling analysis ; future climate ; forest ; respiration ; mortality ; balance
收录类别	SCI
语种	英语
WOS记录号	WOS:000337607900012
公开日期	2014-12-19
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
作者单位	1.Beijing Normal Univ, State Key Lab Earth Surface Proc & Resource Ecol, Beijing 100875, Peoples R China 2.Cent South Univ Forestry & Technol, Natl Engn Lab Appl Technol Forestry & Ecol South, Changsha, Hunan, Peoples R China 3.Chinese Acad Meteorol Sci, Beijing, Peoples R China 4.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China 5.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China 6.Chinese Acad Sci, Inst Atmospher Phys, Key Lab Reg Climate, Beijing, Peoples R China 7.Michigan State Univ, CGCEO, E Lansing, MI 48824 USA 8.Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Peoples R China 9.Lanzhou Univ, Lanzhou 730000, Gansu, Peoples R China 10.Chinese Acad Sci, Inst Atmospher Phys, Beijing, Peoples R China
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,2014,119(5):881-896.
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,119(5),881-896.
MLA	Yuan, Wenping,et al."Multiyear precipitation reduction strongly decreases carbon uptake over northern China".journal of geophysical research-biogeosciences 119.5(2014):881-896.