Spatio-Temporal Variations of Soil Active Layer Thickness in Chinese Boreal Forests from 2000 to 2015

doi:10.3390/rs10081225

	Spatio-Temporal Variations of Soil Active Layer Thickness in Chinese Boreal Forests from 2000 to 2015
	Bai, Xiongxiong 1,2; Yang, Jian 1,3; Tao, Bo 4; Ren, Wei 4
刊名	REMOTE SENSING
	2018-08-01
卷号	10 期号:8
关键词	Active Layer Thickness Boreal Forests Remote Sensing Modis
ISSN号	2072-4292
DOI	10.3390/rs10081225
英文摘要	The soil active layer in boreal forests is sensitive to climate warming. Climate-induced changes in the active layer may greatly affect the global carbon budget and planetary climatic system by releasing large quantities of greenhouse gases that currently are stored in permafrost. Ground surface temperature is an immediate driver of active layer thickness (ALT) dynamics. In this study, we mapped ALT distribution in Chinese boreal larch forests from 2000 to 2015 by integrating remote sensing data with the Stefan equation. We then examined the changes of the ALT in response to changes in ground surface temperature and identified drivers of the spatio-temporal patterns of ALT. Active layer thickness varied from 1.18 to 1.3 m in the study area. Areas of nonforested land and low elevation or with increased air temperature had a relatively high ALT, whereas ALT was lower at relatively high elevation and with decreased air temperatures. Interannual variations of ALT had no obvious trend, however, and the ALT changed at a rate of only -0.01 and 0.01 m year(-1). In a mega-fire patch of 79,000 ha burned in 2003, ALT (ALT(i) - ALT(2002), where 2003 i 2015) was significantly higher than in the unburned area, with the influence of the wildfire persisting 10 years. Under the high emission scenario (RCP8.5), an increase of 2.6-4.8 degrees C in mean air temperature would increase ALT into 1.46-1.55 m by 2100, which in turn would produce a significant positive feedback to climate warming.
WOS研究方向	Remote Sensing
语种	英语
出版者	MDPI
WOS记录号	WOS:000443618100061
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/121205]
专题	中国科学院沈阳应用生态研究所
通讯作者	Yang, Jian
作者单位	1.Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Liaoning, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Univ Kentucky, Dept Forestry, Lexington, KY 40546 USA 4.Univ Kentucky, Dept Plant & Soil Sci, Lexington, KY 40546 USA
推荐引用方式 GB/T 7714	Bai, Xiongxiong,Yang, Jian,Tao, Bo,et al. Spatio-Temporal Variations of Soil Active Layer Thickness in Chinese Boreal Forests from 2000 to 2015[J]. REMOTE SENSING,2018,10(8).
APA	Bai, Xiongxiong,Yang, Jian,Tao, Bo,&Ren, Wei.(2018).Spatio-Temporal Variations of Soil Active Layer Thickness in Chinese Boreal Forests from 2000 to 2015.REMOTE SENSING,10(8).
MLA	Bai, Xiongxiong,et al."Spatio-Temporal Variations of Soil Active Layer Thickness in Chinese Boreal Forests from 2000 to 2015".REMOTE SENSING 10.8(2018).