气候变化领域集成服务门户(CCPortal): Channel Network Control on Seasonal Lake Area Dynamics in Arctic Deltas

CCPortal

DOI	10.1029/2019GL086710
	Channel Network Control on Seasonal Lake Area Dynamics in Arctic Deltas
	Vulis L.; Tejedor A.; Schwenk J.; Piliouras A.; Rowland J.; Foufoula-Georgiou E.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:7
英文摘要	The abundant lakes dotting arctic deltas are hotspots of methane emissions and biogeochemical activity, but seasonal variability in lake extents introduces uncertainty in estimates of lacustrine carbon emissions, typically performed at annual or longer time scales. To characterize variability in lake extents, we analyzed summertime lake area loss (i.e., shrinkage) on two deltas over the past 20 years, using Landsat-derived water masks. We find that monthly shrinkage rates have a pronounced structured variability around the channel network with the shrinkage rate systematically decreasing farther away from the channels. This pattern of shrinkage is predominantly attributed to a deeper active layer enhancing near-surface connectivity and storage and greater vegetation density closer to the channels leading to increased evapotranspiration rates. This shrinkage signal, easily extracted from remote sensing observations, may offer the means to constrain estimates of lacustrine methane emissions and to develop process-based estimates of depth to permafrost on arctic deltas. © 2020. The Authors.
英文关键词	Methane; Remote sensing; Shrinkage; Uncertainty analysis; Biogeochemical; Carbon emissions; Channel network; Methane emissions; Process-based; Seasonal variability; Shrinkage rates; Vegetation density; Lakes; carbon emission; delta; evapotranspiration; lacustrine environment; remote sensing; seasonal variation; water mass; Arctic Ocean
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170498
作者单位	Department of Civil and Environmental Engineering, University of California Irvine, Irvine, CA, United States; Department of Science and Engineering, Sorbonne University Abu Dhabi, Abu Dhabi, United Arab Emirates; Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM, United States; Department of Earth System Science, University of California Irvine, Irvine, CA, United States
推荐引用方式 GB/T 7714	Vulis L.,Tejedor A.,Schwenk J.,et al. Channel Network Control on Seasonal Lake Area Dynamics in Arctic Deltas[J],2020,47(7).
APA	Vulis L.,Tejedor A.,Schwenk J.,Piliouras A.,Rowland J.,&Foufoula-Georgiou E..(2020).Channel Network Control on Seasonal Lake Area Dynamics in Arctic Deltas.Geophysical Research Letters,47(7).
MLA	Vulis L.,et al."Channel Network Control on Seasonal Lake Area Dynamics in Arctic Deltas".Geophysical Research Letters 47.7(2020).