干旱区生态环境知识资源中心(Arid): 19812010年内蒙古草地土壤有机碳时空变化及其气候敏感性

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	19812010年内蒙古草地土壤有机碳时空变化及其气候敏感性
其他题名	Spatial-Temporal Change of Soil Organic Carbon and Its Susceptibility to Climate Change in Inner Mongolia Grassland during 1981-2010
	郭灵辉 1; 高江波 2; 吴绍洪 2; 郝成元 1; 赵东升 2
来源期刊	环境科学研究
ISSN	1001-6929
出版年	2016
卷号	29 期号:7 页码:1050-1058
中文摘要	草地土壤有机碳储量巨大,其较小幅度的波动即可能显著反馈于气候变化. 基于19812010年内蒙古自治区境内及其周边共计92个气象台站气候要素插值数据,采用空间化的生物地球化学模型CENTURY 4. 5,模拟分析近30年来内蒙古草地表层(0 ~ 20 cm)土壤有机碳的空间格局与动态变化特征,并通过构建气候变化情景探讨其对主要气候要素的敏感性. 结果表明: 近30年内蒙古草地表层土壤有机碳密度平均值约为1. 99 kg/m~2(以C计),在空间上呈由东北向西南逐渐减少的分布特征.近30年来内蒙古草地表层土壤有机碳密度略有增加,年均增幅约0. 22%,其中草甸草原的增速〔14. 25 g/(m~2·a)〕最大,荒漠草原的增速〔1. 36 g/(m~2·a)〕最小. 草地表层土壤有机碳密度年际变化差异明显, 1980s至1990s的增加较为缓慢, 1990s至2000s的增幅约为前者的2倍,其中草甸草原和典型草原土壤有机碳增幅较大. 气候敏感性分析结果显示,区域降水量变化可能是近30年内蒙古草地表层土壤有机碳密度变化的主要影响因素,但不同草地类型表层土壤有机碳密度对气候变化的敏感性存在较大差异; 典型草原与草甸草原表层土壤有机碳变化主要受控于降水量变化,荒漠草原则主要受控于温度变化.
英文摘要	Grassland soil is a large organic carbon reservoir,and a slight change in soil organic carbon (SOC) stocks has a considerable effect on atmospheric CO_2 concentration,which contributes to climate warming. A comprehensive assessment on SOC dynamics and their susceptibility to climate change in Inner Mongolia grassland is still lacking. Based on the climatic interpolation data from 92 meteorological stations over Inner Mongolia and surrounding areas,the spatial distribution of topsoil (0-20 cm) organic carbon storage in Inner Mongolia grassland and its dynamics during 1981-2010 were estimated using the CENTURY-based modeling system (complying CENTURY model from a site-based model into a spatial model). The sensitivity to climate change was also examined based on scenario simulation analysis. The results showed that the spatial distribution of SOC density (SOCD) in Inner Mongolia grassland showed a decreasing trend from the northeast to the southwest,with an average density of 1. 99 kg/m~2. Inner Mongolia grassland SOCD significantly increased over the past three decades,with an annual increase of 0. 22%, while SOCD also showed a marked heterogeneity corresponding to grassland types,with the largest increase rate of 14. 25 g/(m~2·a) in meadow steppe and the least rate (1. 36 g/(m~2·a)) in desert steppe. There was also a large decadal variability in SOCD. From the 1980s to the 1990s,it changed very slowly, while it was shown to change greatly from the 1990s to the 2000s,about twice as much as the former,primarily attributed to changes in meadow steppe and typical steppe. At the regional scale,change in precipitation played a critical role in the increase of SOCD,but its relative role was not constant across the study area. Increase in SOCD over the typical steppe and meadow steppe was primarily attributed to precipitation changes,while rising temperature was the main cause of SOCD increase in desert steppe.
中文关键词	气候变化 ; 内蒙古草地 ; 土壤有机碳 ; 敏感性
英文关键词	CENTURY 4. 5 climate change Inner Mongolia grassland CENTURY 4. 5 soil organic carbon susceptibility
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:5759551
来源机构	中国科学院地理科学与资源研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/234513
作者单位	1.河南理工大学测绘与国土信息工程学院, 焦作, 河南 454000, 中国; 2.中国科学院地理科学与资源研究所, 中国科学院陆地表层格局与模拟重点实验室, 北京 100101, 中国
推荐引用方式 GB/T 7714	郭灵辉,高江波,吴绍洪,等. 19812010年内蒙古草地土壤有机碳时空变化及其气候敏感性[J]. 中国科学院地理科学与资源研究所,2016,29(7):1050-1058.
APA	郭灵辉,高江波,吴绍洪,郝成元,&赵东升.(2016).19812010年内蒙古草地土壤有机碳时空变化及其气候敏感性.环境科学研究,29(7),1050-1058.
MLA	郭灵辉,et al."19812010年内蒙古草地土壤有机碳时空变化及其气候敏感性".环境科学研究 29.7(2016):1050-1058.