Temperature, water level and bathymetry of thermokarst lakes in the continuous permafrost zone of northern Siberia - Lena River Delta, Siberia
Thermokarst lakes are typical features of the northern permafrost ecosystems, and play an important role in the thermal exchange between atmosphere and subsurface. The objective of this study is to describe the main thermal processes of the lakes and to quantify the heat exchange with the underlying...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.846525 2023-05-15T15:18:57+02:00 Temperature, water level and bathymetry of thermokarst lakes in the continuous permafrost zone of northern Siberia - Lena River Delta, Siberia Boike, Julia Georgi, C Kirilin, G Muster, Sina Abramova, Katya Fedorova, Irina V Chetverova, Antonina Grigoriev, Mikhail N Bornemann, Niko Langer, Moritz MEDIAN LATITUDE: 72.365420 * MEDIAN LONGITUDE: 126.438892 * SOUTH-BOUND LATITUDE: 72.328690 * WEST-BOUND LONGITUDE: 126.177830 * NORTH-BOUND LATITUDE: 72.378175 * EAST-BOUND LONGITUDE: 126.512292 * DATE/TIME START: 2009-07-04T09:00:00 * DATE/TIME END: 2012-08-14T16:00:00 2015-05-27 application/zip, 8 datasets https://doi.pangaea.de/10.1594/PANGAEA.846525 https://doi.org/10.1594/PANGAEA.846525 en eng PANGAEA Figure 1. Location of the study sites in the Lena River Delta of eastern Siberia (URI: hdl:10013/epic.45524.d006) https://doi.pangaea.de/10.1594/PANGAEA.846525 https://doi.org/10.1594/PANGAEA.846525 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Boike, Julia; Georgi, C; Kirilin, G; Muster, Sina; Abramova, Katya; Fedorova, Irina V; Chetverova, Antonina; Grigoriev, Mikhail N; Bornemann, Niko; Langer, Moritz (2015): Thermal processes of thermokarst lakes in the continuous permafrost zone of northern Siberia – observations and modeling (Lena River Delta, Siberia). Biogeosciences, 12(20), 5941-5965, https://doi.org/10.5194/bg-12-5941-2015 Changing Permafrost in the Arctic and its Global Effects in the 21st Century PAGE21 Dataset 2015 ftpangaea https://doi.org/10.1594/PANGAEA.846525 https://doi.org/10.5194/bg-12-5941-2015 2023-01-20T07:33:27Z Thermokarst lakes are typical features of the northern permafrost ecosystems, and play an important role in the thermal exchange between atmosphere and subsurface. The objective of this study is to describe the main thermal processes of the lakes and to quantify the heat exchange with the underlying sediments. The thermal regimes of five lakes located within the continuous permafrost zone of northern Siberia (Lena River Delta) were investigated using hourly water temperature and water level records covering a 3-year period (2009-2012), together with bathymetric survey data. The lakes included thermokarst lakes located on Holocene river terraces that may be connected to Lena River water during spring flooding, and a thermokarst lake located on deposits of the Pleistocene Ice Complex. Lakes were covered by ice up to 2 m thick that persisted for more than 7 months of the year, from October until about mid-June. Lake-bottom temperatures increased at the start of the ice-covered period due to upward-directed heat flux from the underlying thawed sediment. Prior to ice break-up, solar radiation effectively warmed the water beneath the ice cover and induced convective mixing. Ice break-up started at the beginning of June and lasted until the middle or end of June. Mixing occurred within the entire water column from the start of ice break-up and continued during the ice-free periods, as confirmed by the Wedderburn numbers, a quantitative measure of the balance between wind mixing and stratification that is important for describing the biogeochemical cycles of lakes. The lake thermal regime was modeled numerically using the FLake model. The model demonstrated good agreement with observations with regard to the mean lake temperature, with a good reproduction of the summer stratification during the ice-free period, but poor agreement during the ice-covered period. Modeled sensitivity to lake depth demonstrated that lakes in this climatic zone with mean depths > 5 m develop continuous stratification in summer for at least ... Dataset Arctic Ice lena river permafrost Thermokarst Siberia PANGAEA - Data Publisher for Earth & Environmental Science Arctic ENVELOPE(126.177830,126.512292,72.378175,72.328690) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Changing Permafrost in the Arctic and its Global Effects in the 21st Century PAGE21 |
spellingShingle |
Changing Permafrost in the Arctic and its Global Effects in the 21st Century PAGE21 Boike, Julia Georgi, C Kirilin, G Muster, Sina Abramova, Katya Fedorova, Irina V Chetverova, Antonina Grigoriev, Mikhail N Bornemann, Niko Langer, Moritz Temperature, water level and bathymetry of thermokarst lakes in the continuous permafrost zone of northern Siberia - Lena River Delta, Siberia |
topic_facet |
Changing Permafrost in the Arctic and its Global Effects in the 21st Century PAGE21 |
description |
Thermokarst lakes are typical features of the northern permafrost ecosystems, and play an important role in the thermal exchange between atmosphere and subsurface. The objective of this study is to describe the main thermal processes of the lakes and to quantify the heat exchange with the underlying sediments. The thermal regimes of five lakes located within the continuous permafrost zone of northern Siberia (Lena River Delta) were investigated using hourly water temperature and water level records covering a 3-year period (2009-2012), together with bathymetric survey data. The lakes included thermokarst lakes located on Holocene river terraces that may be connected to Lena River water during spring flooding, and a thermokarst lake located on deposits of the Pleistocene Ice Complex. Lakes were covered by ice up to 2 m thick that persisted for more than 7 months of the year, from October until about mid-June. Lake-bottom temperatures increased at the start of the ice-covered period due to upward-directed heat flux from the underlying thawed sediment. Prior to ice break-up, solar radiation effectively warmed the water beneath the ice cover and induced convective mixing. Ice break-up started at the beginning of June and lasted until the middle or end of June. Mixing occurred within the entire water column from the start of ice break-up and continued during the ice-free periods, as confirmed by the Wedderburn numbers, a quantitative measure of the balance between wind mixing and stratification that is important for describing the biogeochemical cycles of lakes. The lake thermal regime was modeled numerically using the FLake model. The model demonstrated good agreement with observations with regard to the mean lake temperature, with a good reproduction of the summer stratification during the ice-free period, but poor agreement during the ice-covered period. Modeled sensitivity to lake depth demonstrated that lakes in this climatic zone with mean depths > 5 m develop continuous stratification in summer for at least ... |
format |
Dataset |
author |
Boike, Julia Georgi, C Kirilin, G Muster, Sina Abramova, Katya Fedorova, Irina V Chetverova, Antonina Grigoriev, Mikhail N Bornemann, Niko Langer, Moritz |
author_facet |
Boike, Julia Georgi, C Kirilin, G Muster, Sina Abramova, Katya Fedorova, Irina V Chetverova, Antonina Grigoriev, Mikhail N Bornemann, Niko Langer, Moritz |
author_sort |
Boike, Julia |
title |
Temperature, water level and bathymetry of thermokarst lakes in the continuous permafrost zone of northern Siberia - Lena River Delta, Siberia |
title_short |
Temperature, water level and bathymetry of thermokarst lakes in the continuous permafrost zone of northern Siberia - Lena River Delta, Siberia |
title_full |
Temperature, water level and bathymetry of thermokarst lakes in the continuous permafrost zone of northern Siberia - Lena River Delta, Siberia |
title_fullStr |
Temperature, water level and bathymetry of thermokarst lakes in the continuous permafrost zone of northern Siberia - Lena River Delta, Siberia |
title_full_unstemmed |
Temperature, water level and bathymetry of thermokarst lakes in the continuous permafrost zone of northern Siberia - Lena River Delta, Siberia |
title_sort |
temperature, water level and bathymetry of thermokarst lakes in the continuous permafrost zone of northern siberia - lena river delta, siberia |
publisher |
PANGAEA |
publishDate |
2015 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.846525 https://doi.org/10.1594/PANGAEA.846525 |
op_coverage |
MEDIAN LATITUDE: 72.365420 * MEDIAN LONGITUDE: 126.438892 * SOUTH-BOUND LATITUDE: 72.328690 * WEST-BOUND LONGITUDE: 126.177830 * NORTH-BOUND LATITUDE: 72.378175 * EAST-BOUND LONGITUDE: 126.512292 * DATE/TIME START: 2009-07-04T09:00:00 * DATE/TIME END: 2012-08-14T16:00:00 |
long_lat |
ENVELOPE(126.177830,126.512292,72.378175,72.328690) |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Ice lena river permafrost Thermokarst Siberia |
genre_facet |
Arctic Ice lena river permafrost Thermokarst Siberia |
op_source |
Supplement to: Boike, Julia; Georgi, C; Kirilin, G; Muster, Sina; Abramova, Katya; Fedorova, Irina V; Chetverova, Antonina; Grigoriev, Mikhail N; Bornemann, Niko; Langer, Moritz (2015): Thermal processes of thermokarst lakes in the continuous permafrost zone of northern Siberia – observations and modeling (Lena River Delta, Siberia). Biogeosciences, 12(20), 5941-5965, https://doi.org/10.5194/bg-12-5941-2015 |
op_relation |
Figure 1. Location of the study sites in the Lena River Delta of eastern Siberia (URI: hdl:10013/epic.45524.d006) https://doi.pangaea.de/10.1594/PANGAEA.846525 https://doi.org/10.1594/PANGAEA.846525 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.846525 https://doi.org/10.5194/bg-12-5941-2015 |
_version_ |
1766349111020224512 |