Methane pathways in winter ice of a thermokarst lake–lagoon–coastal water transect in north Siberia
The thermokarst lakes of permafrost regions play a major role in the global carbon cycle. These lakes are sources of methane to the atmosphere although the methane flux is restricted by an ice cover for most of the year. How methane concentrations and fluxes in these waters are affected by the prese...
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Copernicus Publications
2021
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ftdoajarticles:oai:doaj.org/article:f6c5a1dfa728495d9dc029e7d611b17e 2023-05-15T16:36:50+02:00 Methane pathways in winter ice of a thermokarst lake–lagoon–coastal water transect in north Siberia I. Spangenberg P. P. Overduin E. Damm I. Bussmann H. Meyer S. Liebner M. Angelopoulos B. K. Biskaborn M. N. Grigoriev G. Grosse 2021-03-01T00:00:00Z https://doi.org/10.5194/tc-15-1607-2021 https://doaj.org/article/f6c5a1dfa728495d9dc029e7d611b17e EN eng Copernicus Publications https://tc.copernicus.org/articles/15/1607/2021/tc-15-1607-2021.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-15-1607-2021 1994-0416 1994-0424 https://doaj.org/article/f6c5a1dfa728495d9dc029e7d611b17e The Cryosphere, Vol 15, Pp 1607-1625 (2021) Environmental sciences GE1-350 Geology QE1-996.5 article 2021 ftdoajarticles https://doi.org/10.5194/tc-15-1607-2021 2022-12-31T05:40:44Z The thermokarst lakes of permafrost regions play a major role in the global carbon cycle. These lakes are sources of methane to the atmosphere although the methane flux is restricted by an ice cover for most of the year. How methane concentrations and fluxes in these waters are affected by the presence of an ice cover is poorly understood. To relate water body morphology, ice formation and methane to each other, we studied the ice of three different water bodies in locations typical of the transition of permafrost from land to ocean in a continuous permafrost coastal region in Siberia. In total, 11 ice cores were analyzed as records of the freezing process and methane composition during the winter season. The three water bodies differed in terms of connectivity to the sea, which affected fall freezing. The first was a bay underlain by submarine permafrost (Tiksi Bay, BY), the second a shallow thermokarst lagoon cut off from the sea in winter (Polar Fox Lagoon, LG) and the third a land-locked freshwater thermokarst lake (Goltsovoye Lake, LK). Ice on all water bodies was mostly methane-supersaturated with respect to atmospheric equilibrium concentration, except for three cores from the isolated lake. In the isolated thermokarst lake, ebullition from actively thawing basin slopes resulted in the localized integration of methane into winter ice. Stable <math xmlns="http://www.w3.org/1998/Math/MathML" id="M1" display="inline" overflow="scroll" dspmath="mathml"><mrow class="chem"><msup><mi mathvariant="italic">δ</mi><mn mathvariant="normal">13</mn></msup><msub><mi mathvariant="normal">C</mi><mrow><msub><mi mathvariant="normal">CH</mi><mn mathvariant="normal">4</mn></msub></mrow></msub></mrow></math> <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="41pt" height="18pt" class="svg-formula" dspmath="mathimg" md5hash="513857b00bd22d509b8a16b38102cfc6"><svg:image ... Article in Journal/Newspaper Ice permafrost polar fox The Cryosphere Thermokarst Tiksi Tiksi Bay Siberia Directory of Open Access Journals: DOAJ Articles Tiksi ENVELOPE(128.867,128.867,71.633,71.633) The Cryosphere 15 3 1607 1625 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 I. Spangenberg P. P. Overduin E. Damm I. Bussmann H. Meyer S. Liebner M. Angelopoulos B. K. Biskaborn M. N. Grigoriev G. Grosse Methane pathways in winter ice of a thermokarst lake–lagoon–coastal water transect in north Siberia |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
The thermokarst lakes of permafrost regions play a major role in the global carbon cycle. These lakes are sources of methane to the atmosphere although the methane flux is restricted by an ice cover for most of the year. How methane concentrations and fluxes in these waters are affected by the presence of an ice cover is poorly understood. To relate water body morphology, ice formation and methane to each other, we studied the ice of three different water bodies in locations typical of the transition of permafrost from land to ocean in a continuous permafrost coastal region in Siberia. In total, 11 ice cores were analyzed as records of the freezing process and methane composition during the winter season. The three water bodies differed in terms of connectivity to the sea, which affected fall freezing. The first was a bay underlain by submarine permafrost (Tiksi Bay, BY), the second a shallow thermokarst lagoon cut off from the sea in winter (Polar Fox Lagoon, LG) and the third a land-locked freshwater thermokarst lake (Goltsovoye Lake, LK). Ice on all water bodies was mostly methane-supersaturated with respect to atmospheric equilibrium concentration, except for three cores from the isolated lake. In the isolated thermokarst lake, ebullition from actively thawing basin slopes resulted in the localized integration of methane into winter ice. Stable <math xmlns="http://www.w3.org/1998/Math/MathML" id="M1" display="inline" overflow="scroll" dspmath="mathml"><mrow class="chem"><msup><mi mathvariant="italic">δ</mi><mn mathvariant="normal">13</mn></msup><msub><mi mathvariant="normal">C</mi><mrow><msub><mi mathvariant="normal">CH</mi><mn mathvariant="normal">4</mn></msub></mrow></msub></mrow></math> <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="41pt" height="18pt" class="svg-formula" dspmath="mathimg" md5hash="513857b00bd22d509b8a16b38102cfc6"><svg:image ... |
format |
Article in Journal/Newspaper |
author |
I. Spangenberg P. P. Overduin E. Damm I. Bussmann H. Meyer S. Liebner M. Angelopoulos B. K. Biskaborn M. N. Grigoriev G. Grosse |
author_facet |
I. Spangenberg P. P. Overduin E. Damm I. Bussmann H. Meyer S. Liebner M. Angelopoulos B. K. Biskaborn M. N. Grigoriev G. Grosse |
author_sort |
I. Spangenberg |
title |
Methane pathways in winter ice of a thermokarst lake–lagoon–coastal water transect in north Siberia |
title_short |
Methane pathways in winter ice of a thermokarst lake–lagoon–coastal water transect in north Siberia |
title_full |
Methane pathways in winter ice of a thermokarst lake–lagoon–coastal water transect in north Siberia |
title_fullStr |
Methane pathways in winter ice of a thermokarst lake–lagoon–coastal water transect in north Siberia |
title_full_unstemmed |
Methane pathways in winter ice of a thermokarst lake–lagoon–coastal water transect in north Siberia |
title_sort |
methane pathways in winter ice of a thermokarst lake–lagoon–coastal water transect in north siberia |
publisher |
Copernicus Publications |
publishDate |
2021 |
url |
https://doi.org/10.5194/tc-15-1607-2021 https://doaj.org/article/f6c5a1dfa728495d9dc029e7d611b17e |
long_lat |
ENVELOPE(128.867,128.867,71.633,71.633) |
geographic |
Tiksi |
geographic_facet |
Tiksi |
genre |
Ice permafrost polar fox The Cryosphere Thermokarst Tiksi Tiksi Bay Siberia |
genre_facet |
Ice permafrost polar fox The Cryosphere Thermokarst Tiksi Tiksi Bay Siberia |
op_source |
The Cryosphere, Vol 15, Pp 1607-1625 (2021) |
op_relation |
https://tc.copernicus.org/articles/15/1607/2021/tc-15-1607-2021.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-15-1607-2021 1994-0416 1994-0424 https://doaj.org/article/f6c5a1dfa728495d9dc029e7d611b17e |
op_doi |
https://doi.org/10.5194/tc-15-1607-2021 |
container_title |
The Cryosphere |
container_volume |
15 |
container_issue |
3 |
container_start_page |
1607 |
op_container_end_page |
1625 |
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1766027162422345728 |