气候变化领域集成服务门户(CCPortal): Large sinuous rivers are slowing down in a warming Arctic

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DOI	10.1038/s41558-023-01620-9
	Large sinuous rivers are slowing down in a warming Arctic
	Ielpi, Alessandro; Lapotre, Mathieu G. A.; Finotello, Alvise; Roy-Leveillee, Pascale
发表日期	2023
ISSN	1758-678X
EISSN	1758-6798
起始页码	375
结束页码	+
卷号	13 期号:4
英文摘要	Climate warming affects permafrost regions, with strong impacts on the environment such as the greening of river plains. Here the authors use satellite data to show that these changes have stabilized large Arctic sinuous rivers by slowing their lateral migration by about 20% over the past half-century. Arctic regions are disproportionately affected by atmospheric warming, with cascading effects on multiple surface processes. Atmospheric warming is destabilizing permafrost, which could weaken riverbanks and in turn increase the lateral mobility of their channels. Here, using timelapse analysis of satellite imagery, we show that the lateral migration of large Arctic sinuous rivers has decreased by about 20% over the last half-century, at a mean rate of 3.7 parts per thousand per year. Through a comparison with rivers in non-permafrost regions, we hypothesize that the observed migration slowdown is rooted in a series of indirect effects driven by atmospheric warming, such as bank shrubification and decline in overland flow and seepage discharge along channel banks, linked in turn to permafrost thaw. As lower migration rates directly impact the residence timescales of sediment and organic matter in floodplains, these surprising results may lead to important ramifications for watershed-scale carbon budgets and climate feedbacks.
语种	英语
WOS研究方向	Environmental Sciences ; Environmental Studies ; Meteorology & Atmospheric Sciences
WOS类目	Science Citation Index Expanded (SCI-EXPANDED) ; Social Science Citation Index (SSCI)
WOS记录号	WOS:000953308800004
来源期刊	NATURE CLIMATE CHANGE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/281259
作者单位	University of British Columbia; University of British Columbia Okanagan; Stanford University; University of Padua; Universita Ca Foscari Venezia; Laval University
推荐引用方式 GB/T 7714	Ielpi, Alessandro,Lapotre, Mathieu G. A.,Finotello, Alvise,et al. Large sinuous rivers are slowing down in a warming Arctic[J],2023,13(4).
APA	Ielpi, Alessandro,Lapotre, Mathieu G. A.,Finotello, Alvise,&Roy-Leveillee, Pascale.(2023).Large sinuous rivers are slowing down in a warming Arctic.NATURE CLIMATE CHANGE,13(4).
MLA	Ielpi, Alessandro,et al."Large sinuous rivers are slowing down in a warming Arctic".NATURE CLIMATE CHANGE 13.4(2023).