Channel Network Control on Seasonal Lake Area Dynamics in Arctic Deltas
Channel Network Control on Seasonal Lake Area Dynamics in Arctic Deltas
复制标题
北极三角洲季节性湖区动态的航道网络控制
DOI:
10.1029/2019gl086710
复制
发表时间:
2020
影响因子:
5.2
通讯作者:
Foufoula‐Georgiou, Efi
中科院分区:
文献类型:
--
作者:
Vulis, Lawrence;Tejedor, Alejandro;Schwenk, Jon;Piliouras, Anastasia;Rowland, Joel;Foufoula‐Georgiou, Efi
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.
登录
查看更多内容
DOI:
--
发表时间:
2000
期刊:
影响因子:
--
作者:
M. Jorgenson
通讯作者:
M. Jorgenson
影响因子:
3.4
作者:
J. Schwenk;A. Piliouras;J. Rowland
通讯作者:
J. Schwenk;A. Piliouras;J. Rowland
DOI:
10.1029/2019jf005060
发表时间:
2019
期刊:
Journal of Geophysical Research: Earth Surface
影响因子:
--
作者:
Zheng, Lei;Overeem, Irina;Wang, Kang;Clow, Gary D.
通讯作者:
Clow, Gary D.
影响因子:
4.9
作者:
Vonk, J. E.;Tank, S. E.;Wickland, K. P.
通讯作者:
Wickland, K. P.
DOI:
10.5194/tc-13-591-2019
发表时间:
2018
期刊:
The Cryosphere
影响因子:
--
作者:
K. Aas;L. Martin;Jan Nitzbon;M. Langer;J. Boike;Hanna Lee;T. Berntsen;S. Westermann
通讯作者:
S. Westermann