气候变化领域集成服务门户(CCPortal): Declining greenness in Arctic-boreal lakes

CCPortal

DOI	10.1073/pnas.2021219118
	Declining greenness in Arctic-boreal lakes
	Kuhn C.; Butman D.
发表日期	2021
ISSN	00278424
卷号	118 期号:15
英文摘要	The highest concentration of the world's lakes are found in Arctic-boreal regions [C. Verpoorter, T. Kutser, D. A. Seekell, L. J. Tranvik, Geophys. Res. Lett. 41, 6396-6402 (2014)], and consequently are undergoing the most rapid warming [J. E. Overland et al., Arctic Report Card (2018)]. However, the ecological response of Arctic-boreal lakes to warming remains highly uncertain. Historical trends in lake color from remote sensing observations can provide insights into changing lake ecology, yet have not been examined at the pan-Arctic scale. Here, we analyze time series of 30-m Landsat growing season composites to quantify trends in lake greenness for >4 × 105 waterbodies in boreal and Arctic western North America. We find lake greenness declined overall by 15% from the first to the last decade of analysis within the 6.3 × 106-km2 study region but with significant spatial variability. Greening declines were more likely to be found in areas also undergoing increases in air temperature and precipitation. These findings support the hypothesis that warming has increased connectivity between lakes and the land surface [A. Bring et al., J. Geophys. Res. Biogeosciences 121, 621-649 (2016)], with implications for lake carbon cycling and energy budgets. Our study provides spatially explicit information linking climate to pan-Arctic lake color changes, a finding that will help target future ecological monitoring in remote yet rapidly changing regions. © This open access article is distributed under Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND).
英文关键词	Arctic; Boreal; Color; Lakes; Landsat
语种	英语
scopus关键词	air temperature; Arctic; article; budget; carbon cycling; climate; growing season; lake; North America; precipitation; quantitative analysis; satellite imagery; time series analysis; warming
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/179887
作者单位	School of Environmental and Forest Sciences, University of Washington, Seattle, WA 98195, United States; Department of Civil and Environment Engineering, University of Washington, Seattle, WA 98195, United States
推荐引用方式 GB/T 7714	Kuhn C.,Butman D.. Declining greenness in Arctic-boreal lakes[J],2021,118(15).
APA	Kuhn C.,&Butman D..(2021).Declining greenness in Arctic-boreal lakes.Proceedings of the National Academy of Sciences of the United States of America,118(15).
MLA	Kuhn C.,et al."Declining greenness in Arctic-boreal lakes".Proceedings of the National Academy of Sciences of the United States of America 118.15(2021).