Effect of Permafrost Thawing on Discharge of the Kolyma River, Northeastern Siberia

With permafrost warming, the observed discharge of the Kolyma River in northeastern Siberia decreased between 1930s and 2000; however, the underlying mechanism is not well understood. To understand the hydrological changes in the Kolyma River, it is important to analyze the long-term hydrometeorolog...

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Autores principales:	Kazuyoshi Suzuki, Hotaek Park, Olga Makarieva, Hironari Kanamori, Masahiro Hori, Koji Matsuo, Shinji Matsumura, Nataliia Nesterova, Tetsuya Hiyama
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	active layer thickness permafrost dam regulation lag correlation terrestrial water storage the Kolyma River Science Q
Acceso en línea:	https://doaj.org/article/481bddc1f3184ce68cf84fccfb5d603f
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id	oai:doaj.org-article:481bddc1f3184ce68cf84fccfb5d603f
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spelling	oai:doaj.org-article:481bddc1f3184ce68cf84fccfb5d603f2021-11-11T18:55:18ZEffect of Permafrost Thawing on Discharge of the Kolyma River, Northeastern Siberia10.3390/rs132143892072-4292https://doaj.org/article/481bddc1f3184ce68cf84fccfb5d603f2021-10-01T00:00:00Zhttps://www.mdpi.com/2072-4292/13/21/4389https://doaj.org/toc/2072-4292With permafrost warming, the observed discharge of the Kolyma River in northeastern Siberia decreased between 1930s and 2000; however, the underlying mechanism is not well understood. To understand the hydrological changes in the Kolyma River, it is important to analyze the long-term hydrometeorological features, along with the changes in the active layer thickness. A coupled hydrological and biogeochemical model was used to analyze the hydrological changes due to permafrost warming during 1979–2012, and the simulated results were validated with satellite-based products and in situ observational records. The increase in the active layer thickness by permafrost warming suppressed the summer discharge contrary to the increased summer precipitation. This suggests that the increased terrestrial water storage anomaly (TWSA) contributed to increased evapotranspiration, which likely reduced soil water stress to plants. As soil freeze–thaw processes in permafrost areas serve as factors of climate memory, we identified a two-year lag between precipitation and evapotranspiration via TWSA. The present results will expand our understanding of future Arctic changes and can be applied to Arctic adaptation measures.Kazuyoshi SuzukiHotaek ParkOlga MakarievaHironari KanamoriMasahiro HoriKoji MatsuoShinji MatsumuraNataliia NesterovaTetsuya HiyamaMDPI AGarticleactive layer thicknesspermafrostdam regulationlag correlationterrestrial water storagethe Kolyma RiverScienceQENRemote Sensing, Vol 13, Iss 4389, p 4389 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	active layer thickness permafrost dam regulation lag correlation terrestrial water storage the Kolyma River Science Q
spellingShingle	active layer thickness permafrost dam regulation lag correlation terrestrial water storage the Kolyma River Science Q Kazuyoshi Suzuki Hotaek Park Olga Makarieva Hironari Kanamori Masahiro Hori Koji Matsuo Shinji Matsumura Nataliia Nesterova Tetsuya Hiyama Effect of Permafrost Thawing on Discharge of the Kolyma River, Northeastern Siberia
description	With permafrost warming, the observed discharge of the Kolyma River in northeastern Siberia decreased between 1930s and 2000; however, the underlying mechanism is not well understood. To understand the hydrological changes in the Kolyma River, it is important to analyze the long-term hydrometeorological features, along with the changes in the active layer thickness. A coupled hydrological and biogeochemical model was used to analyze the hydrological changes due to permafrost warming during 1979–2012, and the simulated results were validated with satellite-based products and in situ observational records. The increase in the active layer thickness by permafrost warming suppressed the summer discharge contrary to the increased summer precipitation. This suggests that the increased terrestrial water storage anomaly (TWSA) contributed to increased evapotranspiration, which likely reduced soil water stress to plants. As soil freeze–thaw processes in permafrost areas serve as factors of climate memory, we identified a two-year lag between precipitation and evapotranspiration via TWSA. The present results will expand our understanding of future Arctic changes and can be applied to Arctic adaptation measures.
format	article
author	Kazuyoshi Suzuki Hotaek Park Olga Makarieva Hironari Kanamori Masahiro Hori Koji Matsuo Shinji Matsumura Nataliia Nesterova Tetsuya Hiyama
author_facet	Kazuyoshi Suzuki Hotaek Park Olga Makarieva Hironari Kanamori Masahiro Hori Koji Matsuo Shinji Matsumura Nataliia Nesterova Tetsuya Hiyama
author_sort	Kazuyoshi Suzuki
title	Effect of Permafrost Thawing on Discharge of the Kolyma River, Northeastern Siberia
title_short	Effect of Permafrost Thawing on Discharge of the Kolyma River, Northeastern Siberia
title_full	Effect of Permafrost Thawing on Discharge of the Kolyma River, Northeastern Siberia
title_fullStr	Effect of Permafrost Thawing on Discharge of the Kolyma River, Northeastern Siberia
title_full_unstemmed	Effect of Permafrost Thawing on Discharge of the Kolyma River, Northeastern Siberia
title_sort	effect of permafrost thawing on discharge of the kolyma river, northeastern siberia
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/481bddc1f3184ce68cf84fccfb5d603f
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Effect of Permafrost Thawing on Discharge of the Kolyma River, Northeastern Siberia

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