Channel Network Control on Seasonal Lake Area Dynamics in Arctic Deltas
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 lak...
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2020
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| Online Access: | http://hdl.handle.net/20.500.12458/440 |
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| _version_ | 1857415063952949248 |
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| author | Tejedor, Alejandro |
| author2 | Foufoula-Georgiou, Efi Piliouras, Anastasia Rowland, Joel Schwenk, Jon Vulis, Lawrence |
| author2_role | author author author author author |
| author_facet | Tejedor, Alejandro Foufoula-Georgiou, Efi Piliouras, Anastasia Rowland, Joel Schwenk, Jon Vulis, Lawrence |
| author_role | author |
| dc.creator.none.fl_str_mv | Tejedor, Alejandro Foufoula-Georgiou, Efi Piliouras, Anastasia Rowland, Joel Schwenk, Jon Vulis, Lawrence |
| dc.date.none.fl_str_mv | 2020-11-22T06:54:47Z 2020-11-22T06:54:47Z 2020 |
| dc.format.none.fl_str_mv | application/pdf |
| dc.identifier.none.fl_str_mv | Geophysical Research Letters 2020 vol: 47 (7) , p 1-10 http://hdl.handle.net/20.500.12458/440 10.1029/2019GL086710 |
| dc.language.none.fl_str_mv | en |
| dc.relation.none.fl_str_mv | Geophysical Research Letters 7 47 1 10 |
| dc.title.none.fl_str_mv | Channel Network Control on Seasonal Lake Area Dynamics in Arctic Deltas |
| dc.type.none.fl_str_mv | Controlled Vocabulary for Resource Type Genres::text::periodical::journal::contribution to journal::journal article |
| description | 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. |
| id | sorbonner_3a63eee0cea076969f1b6fa33f3ddc86 |
| identifier_str_mv | Geophysical Research Letters 2020 vol: 47 (7) , p 1-10 10.1029/2019GL086710 |
| language_invalid_str_mv | en |
| network_acronym_str | sorbonner |
| network_name_str | Sorbonne University Abu Dhabi repository |
| oai_identifier_str | oai:depot.sorbonne.ae:20.500.12458/440 |
| publishDate | 2020 |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| spelling | Channel Network Control on Seasonal Lake Area Dynamics in Arctic DeltasTejedor, AlejandroFoufoula-Georgiou, EfiPiliouras, AnastasiaRowland, JoelSchwenk, JonVulis, LawrenceThe 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.2020-11-22T06:54:47Z2020-11-22T06:54:47Z2020Controlled Vocabulary for Resource Type Genres::text::periodical::journal::contribution to journal::journal articleapplication/pdfGeophysical Research Letters 2020 vol: 47 (7) , p 1-10http://hdl.handle.net/20.500.12458/44010.1029/2019GL086710enGeophysical Research Letters747110oai:depot.sorbonne.ae:20.500.12458/4402023-12-05T05:55:11Z |
| spellingShingle | Channel Network Control on Seasonal Lake Area Dynamics in Arctic Deltas Tejedor, Alejandro |
| title | Channel Network Control on Seasonal Lake Area Dynamics in Arctic Deltas |
| title_full | Channel Network Control on Seasonal Lake Area Dynamics in Arctic Deltas |
| title_fullStr | Channel Network Control on Seasonal Lake Area Dynamics in Arctic Deltas |
| title_full_unstemmed | Channel Network Control on Seasonal Lake Area Dynamics in Arctic Deltas |
| title_short | Channel Network Control on Seasonal Lake Area Dynamics in Arctic Deltas |
| title_sort | Channel Network Control on Seasonal Lake Area Dynamics in Arctic Deltas |
| url | http://hdl.handle.net/20.500.12458/440 |