干旱区生态环境知识资源中心(Arid): 半干旱区土壤有机碳密度遥感估算

Arid

	半干旱区土壤有机碳密度遥感估算
其他题名	Estimation of Soil Organic Carbon Density in Semi-arid Area by Remote Sensing
	王燕; 高志海; 孙斌; 李长龙; 宋张亮
来源期刊	遥感信息
ISSN	1000-3177
出版年	2019
卷号	34 期号:5 页码:103-112
中文摘要	定量估算半干旱区土壤有机碳密度(soil organic carbon density,SOCD)及空间分布规律对了解该区域的土壤碳收支情况具有重要意义。该研究基于陆地碳循环平衡原理,结合20122016年MODIS数据和CASA模型估算了浑善达克沙地及其周边地区的年均NPP和年均土壤基础呼吸,将年均NPP与年均土壤基础呼吸分别与实测SOCD进行相关性分析,构建最优的SOCD估算模型。结果表明,研究区土壤表层(0~10cm)平均SOCD约为1.68kg cm~2,SOCD介于0.5~6.61kg cm~2之间;SOCD具有高度的空间变异性,由西至东逐渐增大,东部稀疏林地以及灌木林区域SOCD较高,西部荒漠草原地区SOCD较低。研究发现,SOCD与植被、人类生产活动以及气候特征密切相关。
英文摘要	Quantitative estimation of soil organic carbon density(SOCD)and analysis of its spatial distribution in semi-arid area are important for understanding the soil carbon budget in the region.Based on the principle of terrestrial carbon cycle balance,in our study,MODIS data from 2012to 2016and CASA model were used to estimate the average annual NPP and annual average soil basal respiration in Otindag sandy land and its surrounding areas.Based on the correlation analysis between the average annual NPP,the annual soil basic respiration and the measured SOCD,the optimal SOCD estimation model was constructed.The results showed that,the average SOCD at depth of 10cm was approximately 1.68kg cm~2,and the SOCD ranged from 0.5to 6.61kg cm~2.The SOCD varied significantly at different districts,and it increased from west to east gradually.The SOCD in the eastern sparse woodland and shrubland was higher than that in the western desert steppe.Meanwhile,it was found that the SOCD was closely related to vegetation,human activities and climate.
中文关键词	半干旱区 ; 土壤基础呼吸
英文关键词	SOCD MODIS NPP SOCD semi-arid area MODIS NPP soil basal respiration
语种	中文
收录类别	CSCD
WOS类目	GEOSCIENCES MULTIDISCIPLINARY
WOS研究方向	Geology
CSCD记录号	CSCD:6602376
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/315790
作者单位	中国林业科学研究院资源信息研究所, 北京 100091, 中国
推荐引用方式 GB/T 7714	王燕,高志海,孙斌,等. 半干旱区土壤有机碳密度遥感估算[J],2019,34(5):103-112.
APA	王燕,高志海,孙斌,李长龙,&宋张亮.(2019).半干旱区土壤有机碳密度遥感估算.遥感信息,34(5),103-112.
MLA	王燕,et al."半干旱区土壤有机碳密度遥感估算".遥感信息 34.5(2019):103-112.