Net ecosystem productivity of temperate grasslands in northern China: An upscaling study

doi:10.1016/j.agrformet.2013.09.004

	Net ecosystem productivity of temperate grasslands in northern China: An upscaling study
	Zhang, Li 1; Guo, Huadong ; Jia, Gensuo 2; Wylie, Bruce 3; Gilmanov, Tagir 4; Howard, Danny 5; Ji, Lei 6; Xiao, Jingfeng 7; Li, Jing 1; Yuan, Wenping 8; Zhao, Tianbao 2; Chen, Shiping9 ; Zhou, Guangsheng 10; Kato, Tomomichi 11
	2014
发表期刊	AGRICULTURAL AND FOREST METEOROLOGY
ISSN	0168-1923
卷号	184 页码:71-81
摘要	Grassland is one of the widespread biome types globally, and plays an important role in the terrestrial carbon cycle. We examined net ecosystem production (NEP) for the temperate grasslands in northern China from 2000 to 2010. We combined flux observations, satellite data, and climate data to develop a piece-wise regression model for NEP, and then used the model to map NEP for grasslands in northern China. Over the growing season, the northern China's grassland had a net carbon uptake of 158 +/- 25 g Cm-2 during 2000-2010 with the mean regional NEP estimate of 126 TgC. Our results showed generally higher grassland NEP at high latitudes (northeast) than at low latitudes (central and west) because of different grassland types and environmental conditions. In the northeast, which is dominated by meadow steppes, the growing season NEP generally reached 200-300 g Cm-2. In the southwest corner of the region, which is partially occupied by alpine meadow systems, the growing season NEP also reached 200-300 g C m(-2). In the central part, which is dominated by typical steppe systems, the growing season NEP generally varied in the range of 100-200 g Cm-2. The NEP of the northern China's grasslands was highly variable through years, ranging from 129 (2001) to 217 gCm(-2) growing season(-1) (2010). The large interannual variations of NEP could be attributed to the sensitivity of temperate grasslands to climate changes and extreme climatic events. The droughts in 2000, 2001, and 2006 reduced the carbon uptake over the growing season by 11%, 29%, and 16% relative to the long-term (2000-2010) mean. Over the study period (2000-2010), precipitation was significantly correlated with NEP for the growing season (R-2 = 0.35, p-value < 0.1), indicating that water availability is an important stressor for the productivity of the temperate grasslands in semi-arid and arid regions in northern China. We conclude that northern temperate grasslands have the potential to sequester carbon, but the capacity of carbon sequestration depends on grassland types and environmental conditions. Extreme climate events like drought can significantly reduce the net carbon uptake of grasslands. (C) 2013 Elsevier B.V. All rights reserved.
关键词	Flux tower Moderate resolution imaging spectroradiometer (MODIS) Net ecosystem production (NEP) Normalized difference vegetation index (NDVI) Piecewise regression
学科领域	Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
DOI	10.1016/j.agrformet.2013.09.004
收录类别	SCI
语种	英语
WOS关键词	CARBON-DIOXIDE EXCHANGE ; GROSS PRIMARY PRODUCTION ; GREAT-PLAINS GRASSLAND ; CO2 EXCHANGE ; INTERANNUAL VARIABILITY ; PRECIPITATION GRADIENT ; COMBINING MODIS ; ALPINE MEADOW ; WATER-VAPOR ; DRY YEAR
WOS研究方向	Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000328666400007
出版者	ELSEVIER
文献子类	Article
出版地	AMSTERDAM
EISSN	1873-2240
资助机构	International Cooperation and Exchanges NSFC [41120114001] ; Director Innovation Foundation of Center for Earth Observation and Digital Earth, CAS [Y2ZZ19101B] ; USGS [08HQCN0005, G13PC00028] ; USGS Land Change Science Program ; National Science Foundation (NSF) [1065777] ; NASA [NNX11AL32G]
作者邮箱	lizhang@ceode.ac.cn
作品OA属性	Green Published
引用统计	被引频次：41[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/27275
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Remote Sensing & Digital Earth, Key Lab Digital Earth Sci, Beijing 100094, Peoples R China 2.Beijing Normal Univ, Acad Disaster Reduct & Emergency Management, State Key Lab Earth Surface Proc & Resource Ecol, Beijing 100875, Peoples R China 3.Chinese Acad Sci, Inst Atmospher Phys, Key Lab Reg Climate Environm East Asia TEA, Beijing 100029, Peoples R China 4.US Geol Survey, Earth Resources Observat & Sci EROS Ctr, Sioux Falls, SD 57198 USA 5.S Dakota State Univ, Dept Nat Resource Management, Brookings, SD 57007 USA 6.USGS EROS Ctr, Sioux Falls, SD 57198 USA 7.USGS EROS Ctr, ASRC InuTeq, Sioux Falls, SD 57198 USA 8.Univ New Hampshire, Inst Study Earth Oceans & Space, Earth Syst Res Ctr, Durham, NH 03824 USA 9.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Cryospher Sci, Lanzhou 730000, Gansu, Peoples R China 10.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 11.Chinese Acad Meteorol Sci, Beijing 100081, Peoples R China 12.CEA CNRS UVSQ, Lab Sci Climat & Environm, Paris, France
推荐引用方式 GB/T 7714	Zhang, Li,Guo, Huadong,Jia, Gensuo,et al. Net ecosystem productivity of temperate grasslands in northern China: An upscaling study[J]. AGRICULTURAL AND FOREST METEOROLOGY,2014,184:71-81.
APA	Zhang, Li.,Guo, Huadong.,Jia, Gensuo.,Wylie, Bruce.,Gilmanov, Tagir.,...&Kato, Tomomichi.(2014).Net ecosystem productivity of temperate grasslands in northern China: An upscaling study.AGRICULTURAL AND FOREST METEOROLOGY,184,71-81.
MLA	Zhang, Li,et al."Net ecosystem productivity of temperate grasslands in northern China: An upscaling study".AGRICULTURAL AND FOREST METEOROLOGY 184(2014):71-81.

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