NSF-OPP ARC-102328: Collaborative Research: The East Siberian Arctic Shelf as a Source of Atmospheric Methane: First Approach to Quantitative Assessment
The East Siberian Arctic shelf (ESAS) is the largest (~10% of the world ocean shelf area) and the shallowest shelf (mean depth <50 m) of the world ocean. Until this study, the ESAS was not considered a source of methane (CH4) to the atmosphere due to subsea permafrost’s impermeability, which comp...
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dataone:dcx_a2850363-45a1-496d-96a3-e2c8441e3467_1 2024-06-03T18:46:30+00:00 NSF-OPP ARC-102328: Collaborative Research: The East Siberian Arctic Shelf as a Source of Atmospheric Methane: First Approach to Quantitative Assessment ENVELOPE(70.0,180.0,89.0,65.0) 2015-06-18T21:22:42.301Z https://search.dataone.org/view/dcx_a2850363-45a1-496d-96a3-e2c8441e3467_1 unknown International Arctic Research Center (IARC) Data Archive Arctic shelf carbon methane release biogeochemistry subsea permafrost permafrost thawing Siberian Arctic Dataset dataone:urn:node:IARC 2024-06-03T18:07:27Z The East Siberian Arctic shelf (ESAS) is the largest (~10% of the world ocean shelf area) and the shallowest shelf (mean depth <50 m) of the world ocean. Until this study, the ESAS was not considered a source of methane (CH4) to the atmosphere due to subsea permafrost’s impermeability, which completely isolated it from modern biogeochemical cycles. The ESAS stores the world’s largest hydrocarbon stocks, mostly as shallow Arctic hydrates, and thus represents an enormous potential CH4 atmospheric source that could result from global warming-triggered permafrost degradation. Increased CH4 fluxes could occur as numerous weak seeps or strong bubble plumes over large areas. Due to the shallow nature of the ESAS, the majority of ESAS CH4 likely avoids oxidation and escapes to the atmosphere. To assess whether sudden, large-scale CH4 release occurs or is likely to occur in the future, we investigated spatial and temporal variability as well as the controlling factors of CH4 flux to the water column, and to the atmosphere. This data set contains results of CH4 measurements performed in the water column using headspace analysis (ppm in gaseous phase) during the expeditions 2009-2010 and observed mixing ratios of CH4 in the atmospheric boundary layer above the water surface (ppm). Dataset Arctic Collaborative Research: The East Siberian Arctic Shelf as a Source of Atmospheric Methane: First Approach to Quantitative Assessment Global warming permafrost International Arctic Research Center (IARC) Data Archive (via DataONE) Arctic ENVELOPE(70.0,180.0,89.0,65.0) |
institution |
Open Polar |
collection |
International Arctic Research Center (IARC) Data Archive (via DataONE) |
op_collection_id |
dataone:urn:node:IARC |
language |
unknown |
topic |
Arctic shelf carbon methane release biogeochemistry subsea permafrost permafrost thawing Siberian Arctic |
spellingShingle |
Arctic shelf carbon methane release biogeochemistry subsea permafrost permafrost thawing Siberian Arctic NSF-OPP ARC-102328: Collaborative Research: The East Siberian Arctic Shelf as a Source of Atmospheric Methane: First Approach to Quantitative Assessment |
topic_facet |
Arctic shelf carbon methane release biogeochemistry subsea permafrost permafrost thawing Siberian Arctic |
description |
The East Siberian Arctic shelf (ESAS) is the largest (~10% of the world ocean shelf area) and the shallowest shelf (mean depth <50 m) of the world ocean. Until this study, the ESAS was not considered a source of methane (CH4) to the atmosphere due to subsea permafrost’s impermeability, which completely isolated it from modern biogeochemical cycles. The ESAS stores the world’s largest hydrocarbon stocks, mostly as shallow Arctic hydrates, and thus represents an enormous potential CH4 atmospheric source that could result from global warming-triggered permafrost degradation. Increased CH4 fluxes could occur as numerous weak seeps or strong bubble plumes over large areas. Due to the shallow nature of the ESAS, the majority of ESAS CH4 likely avoids oxidation and escapes to the atmosphere. To assess whether sudden, large-scale CH4 release occurs or is likely to occur in the future, we investigated spatial and temporal variability as well as the controlling factors of CH4 flux to the water column, and to the atmosphere. This data set contains results of CH4 measurements performed in the water column using headspace analysis (ppm in gaseous phase) during the expeditions 2009-2010 and observed mixing ratios of CH4 in the atmospheric boundary layer above the water surface (ppm). |
format |
Dataset |
title |
NSF-OPP ARC-102328: Collaborative Research: The East Siberian Arctic Shelf as a Source of Atmospheric Methane: First Approach to Quantitative Assessment |
title_short |
NSF-OPP ARC-102328: Collaborative Research: The East Siberian Arctic Shelf as a Source of Atmospheric Methane: First Approach to Quantitative Assessment |
title_full |
NSF-OPP ARC-102328: Collaborative Research: The East Siberian Arctic Shelf as a Source of Atmospheric Methane: First Approach to Quantitative Assessment |
title_fullStr |
NSF-OPP ARC-102328: Collaborative Research: The East Siberian Arctic Shelf as a Source of Atmospheric Methane: First Approach to Quantitative Assessment |
title_full_unstemmed |
NSF-OPP ARC-102328: Collaborative Research: The East Siberian Arctic Shelf as a Source of Atmospheric Methane: First Approach to Quantitative Assessment |
title_sort |
nsf-opp arc-102328: collaborative research: the east siberian arctic shelf as a source of atmospheric methane: first approach to quantitative assessment |
publisher |
International Arctic Research Center (IARC) Data Archive |
publishDate |
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url |
https://search.dataone.org/view/dcx_a2850363-45a1-496d-96a3-e2c8441e3467_1 |
op_coverage |
ENVELOPE(70.0,180.0,89.0,65.0) |
long_lat |
ENVELOPE(70.0,180.0,89.0,65.0) |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Collaborative Research: The East Siberian Arctic Shelf as a Source of Atmospheric Methane: First Approach to Quantitative Assessment Global warming permafrost |
genre_facet |
Arctic Collaborative Research: The East Siberian Arctic Shelf as a Source of Atmospheric Methane: First Approach to Quantitative Assessment Global warming permafrost |
_version_ |
1800866936473518080 |