Characteristics of thermokarst ponds and lakes of the Lena River Delta, Northern Siberia

The Lena River Delta in Northern Yakutia forms one of the largest deltas in the Arctic and its catchment area (2 430 000 km2) is one of the largest in the whole of Eurasia. The study site is one of the coldest and driest places on Earth, with a mean annual air temperatures of about -13 °C, a large a...

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Main Authors: Boike, Julia, Langer, Moritz, Muster, Sina, Abnizova, Anna, Miller, Elizabeth, Morgenstern, Anne, Abramova, Ekatarina, Fedorova, I., Chetverova, A., Bornemann, Niko, Wischnewski, Karoline, Georgi, Christoph, Hubberten, Hans-Wolfgang
Format: Conference Object
Language:unknown
Published: 2014
Subjects:
Online Access:https://epic.awi.de/id/eprint/35904/
http://www.eucop4.org/
https://hdl.handle.net/10013/epic.43813
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record_format openpolar
spelling ftawi:oai:epic.awi.de:35904 2024-09-15T18:17:44+00:00 Characteristics of thermokarst ponds and lakes of the Lena River Delta, Northern Siberia Boike, Julia Langer, Moritz Muster, Sina Abnizova, Anna Miller, Elizabeth Morgenstern, Anne Abramova, Ekatarina Fedorova, I. Chetverova, A. Bornemann, Niko Wischnewski, Karoline Georgi, Christoph Hubberten, Hans-Wolfgang 2014-06-21 https://epic.awi.de/id/eprint/35904/ http://www.eucop4.org/ https://hdl.handle.net/10013/epic.43813 unknown Boike, J. orcid:0000-0002-5875-2112 , Langer, M. orcid:0000-0002-2704-3655 , Muster, S. , Abnizova, A. , Miller, E. , Morgenstern, A. orcid:0000-0002-6466-7571 , Abramova, E. , Fedorova, I. , Chetverova, A. , Bornemann, N. orcid:0000-0001-5415-509X , Wischnewski, K. , Georgi, C. and Hubberten, H. W. (2014) Characteristics of thermokarst ponds and lakes of the Lena River Delta, Northern Siberia , EUCOP4 - 4th European Conference on Permafrost, Évora, Portugal, 18 June 2014 - 21 June 2014 . hdl:10013/epic.43813 EPIC3EUCOP4 - 4th European Conference on Permafrost, Évora, Portugal, 2014-06-18-2014-06-21 Conference notRev 2014 ftawi 2024-06-24T04:09:53Z The Lena River Delta in Northern Yakutia forms one of the largest deltas in the Arctic and its catchment area (2 430 000 km2) is one of the largest in the whole of Eurasia. The study site is one of the coldest and driest places on Earth, with a mean annual air temperatures of about -13 °C, a large annual air temperature range of about 44 °C and summer precipitation usually less than 150 mm. Permafrost plays a major role for storage and release of water to rivers and surface and subsurface water bodies. Very cold continuous permafrost of about −8.6°C underlays the area between about 400 and 600 m below the surface and since 2006 the permafrost has warmed more than 1°C at 10.7 m. Roughly half of the land surface is dominated by wet surfaces, such as polygons, thermokarst lakes and ponds. Ponds are generally well mixed and experience high water temperatures up to 23°C during the summer and therefore are hotspots for biological activity and CO2 emission. Compared to the gaseous emissions, however, the lateral export of dissolved carbon from the polygonal tundra was negligible due to the small volumes of runoff. The ponds in the study area freeze completely in winter, whereas the deeper thermokarst lakes do not freeze to the bottom. These deep thermokarst lakes are thermally stratified during winter and reach maximum water temperatures of up to 19°C during summer. There are distinct differences in the zooplankton community between ponds and lakes, depending on their hydrological and chemical characteristics. Most productive ecosystems are thermokarst ponds with a high abundance of zooplankton and biomass. The summer water balance at the catchment scale was found to be mainly controlled by vertical fluxes (precipitation and evapotranspiration). Overall, the long-term summer storage (precipitation minus evapotranspiration) in the polygonal tundra from 1958-2011 is reasonably balanced with an average surplus of 5 mm. But it is also characterized by high inter-annual variability due to changes in precipitation. During ... Conference Object lena river permafrost Thermokarst Tundra Yakutia Zooplankton Siberia Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
institution Open Polar
collection Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
op_collection_id ftawi
language unknown
description The Lena River Delta in Northern Yakutia forms one of the largest deltas in the Arctic and its catchment area (2 430 000 km2) is one of the largest in the whole of Eurasia. The study site is one of the coldest and driest places on Earth, with a mean annual air temperatures of about -13 °C, a large annual air temperature range of about 44 °C and summer precipitation usually less than 150 mm. Permafrost plays a major role for storage and release of water to rivers and surface and subsurface water bodies. Very cold continuous permafrost of about −8.6°C underlays the area between about 400 and 600 m below the surface and since 2006 the permafrost has warmed more than 1°C at 10.7 m. Roughly half of the land surface is dominated by wet surfaces, such as polygons, thermokarst lakes and ponds. Ponds are generally well mixed and experience high water temperatures up to 23°C during the summer and therefore are hotspots for biological activity and CO2 emission. Compared to the gaseous emissions, however, the lateral export of dissolved carbon from the polygonal tundra was negligible due to the small volumes of runoff. The ponds in the study area freeze completely in winter, whereas the deeper thermokarst lakes do not freeze to the bottom. These deep thermokarst lakes are thermally stratified during winter and reach maximum water temperatures of up to 19°C during summer. There are distinct differences in the zooplankton community between ponds and lakes, depending on their hydrological and chemical characteristics. Most productive ecosystems are thermokarst ponds with a high abundance of zooplankton and biomass. The summer water balance at the catchment scale was found to be mainly controlled by vertical fluxes (precipitation and evapotranspiration). Overall, the long-term summer storage (precipitation minus evapotranspiration) in the polygonal tundra from 1958-2011 is reasonably balanced with an average surplus of 5 mm. But it is also characterized by high inter-annual variability due to changes in precipitation. During ...
format Conference Object
author Boike, Julia
Langer, Moritz
Muster, Sina
Abnizova, Anna
Miller, Elizabeth
Morgenstern, Anne
Abramova, Ekatarina
Fedorova, I.
Chetverova, A.
Bornemann, Niko
Wischnewski, Karoline
Georgi, Christoph
Hubberten, Hans-Wolfgang
spellingShingle Boike, Julia
Langer, Moritz
Muster, Sina
Abnizova, Anna
Miller, Elizabeth
Morgenstern, Anne
Abramova, Ekatarina
Fedorova, I.
Chetverova, A.
Bornemann, Niko
Wischnewski, Karoline
Georgi, Christoph
Hubberten, Hans-Wolfgang
Characteristics of thermokarst ponds and lakes of the Lena River Delta, Northern Siberia
author_facet Boike, Julia
Langer, Moritz
Muster, Sina
Abnizova, Anna
Miller, Elizabeth
Morgenstern, Anne
Abramova, Ekatarina
Fedorova, I.
Chetverova, A.
Bornemann, Niko
Wischnewski, Karoline
Georgi, Christoph
Hubberten, Hans-Wolfgang
author_sort Boike, Julia
title Characteristics of thermokarst ponds and lakes of the Lena River Delta, Northern Siberia
title_short Characteristics of thermokarst ponds and lakes of the Lena River Delta, Northern Siberia
title_full Characteristics of thermokarst ponds and lakes of the Lena River Delta, Northern Siberia
title_fullStr Characteristics of thermokarst ponds and lakes of the Lena River Delta, Northern Siberia
title_full_unstemmed Characteristics of thermokarst ponds and lakes of the Lena River Delta, Northern Siberia
title_sort characteristics of thermokarst ponds and lakes of the lena river delta, northern siberia
publishDate 2014
url https://epic.awi.de/id/eprint/35904/
http://www.eucop4.org/
https://hdl.handle.net/10013/epic.43813
genre lena river
permafrost
Thermokarst
Tundra
Yakutia
Zooplankton
Siberia
genre_facet lena river
permafrost
Thermokarst
Tundra
Yakutia
Zooplankton
Siberia
op_source EPIC3EUCOP4 - 4th European Conference on Permafrost, Évora, Portugal, 2014-06-18-2014-06-21
op_relation Boike, J. orcid:0000-0002-5875-2112 , Langer, M. orcid:0000-0002-2704-3655 , Muster, S. , Abnizova, A. , Miller, E. , Morgenstern, A. orcid:0000-0002-6466-7571 , Abramova, E. , Fedorova, I. , Chetverova, A. , Bornemann, N. orcid:0000-0001-5415-509X , Wischnewski, K. , Georgi, C. and Hubberten, H. W. (2014) Characteristics of thermokarst ponds and lakes of the Lena River Delta, Northern Siberia , EUCOP4 - 4th European Conference on Permafrost, Évora, Portugal, 18 June 2014 - 21 June 2014 . hdl:10013/epic.43813
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