气候变化领域集成服务门户(CCPortal): Effect of climatic changes and human activity on soil carbon in desertified regions of China

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DOI	10.1111/j.1600-0889.2006.00169.x
	Effect of climatic changes and human activity on soil carbon in desertified regions of China
	Feng, Q; Wei, L; Zhang, YW; Si, JH; Su, YH; Qiang, CZ; Xi, HY
发表日期	2006
ISSN	0280-6509
起始页码	117
结束页码	128
卷号	58 期号:2
英文摘要	A total of 340 soil samples from 17 different types of sandy land regions in China were analyzed for soil organic carbon (SOC). Stepwise regression served to identify correlations between SOC and a number of climatic factors measured at the sampling sites: winter, summer, nighttime and daytime air temperatures (AT) and precipitation. In desertified lands SOC showed a direct correlation with precipitation, but no significant relationship with the mean air temperature. However, in northwest and northeast China decreases in SOC were linked to rises in day/night and seasonal temperatures, while in north China they were linked to a rise in mean temperature. Over the entire study period (1950-1990), precipitation in the region decreased by 25 mm decade(-1), while the mean air temperature increased by 0.14 degrees, 0.28 degrees and 0.15 degrees decade(-1) in the northwest, northeast and north central regions, respectively. Driven by rises in day/night and seasonal temperatures, long-term alterations to global ecosystem processes, particularly the carbon cycle, may significantly alter the number and diversity of plants in desertified ecosystems. Based on multiple regression analysis, over the past 40 years, about 20% of emissions from SOC in the northeast were attributable to air temperature; in the north central region 31 and 16% of emissions were attributable to precipitation and mean AT, respectively; while in the northwest 28, 18 and 32% of the emissions were attributable to mean AT, nighttime temperature, and decreasing precipitation, respectively. It is obvious that human activities are the main single causative factor in the release of SOC-derived greenhouse gases to the atmosphere from desertified areas.
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS关键词	STORAGE ; LAND ; TEMPERATURE ; BALANCE ; TRENDS ; CYCLE
WOS记录号	WOS:000235987700002
来源期刊	TELLUS SERIES B-CHEMICAL AND PHYSICAL METEOROLOGY
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/239397
作者单位	Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Feng, Q,Wei, L,Zhang, YW,et al. Effect of climatic changes and human activity on soil carbon in desertified regions of China[J]. 中国科学院西北生态环境资源研究院,2006,58(2).
APA	Feng, Q.,Wei, L.,Zhang, YW.,Si, JH.,Su, YH.,...&Xi, HY.(2006).Effect of climatic changes and human activity on soil carbon in desertified regions of China.TELLUS SERIES B-CHEMICAL AND PHYSICAL METEOROLOGY,58(2).
MLA	Feng, Q,et al."Effect of climatic changes and human activity on soil carbon in desertified regions of China".TELLUS SERIES B-CHEMICAL AND PHYSICAL METEOROLOGY 58.2(2006).