Extraordinary Carbon Fluxes on the Shallow Pacific Arctic Shelf During a Remarkably Warm and Low Sea Ice Period
The shallow Pacific Arctic shelf has historically acted as an effective carbon sink, characterized by tight benthic pelagic coupling. However, the strength of the biological carbon pump in the Arctic has been predicted to weaken with climate change due to increased duration of the open-water period...
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ftdoajarticles:oai:doaj.org/article:2e6d73c1f32d48edb8cf879d53efedaf 2023-05-15T13:24:39+02:00 Extraordinary Carbon Fluxes on the Shallow Pacific Arctic Shelf During a Remarkably Warm and Low Sea Ice Period Stephanie H. O’Daly Seth L. Danielson Sarah M. Hardy Russell R. Hopcroft Catherine Lalande Dean A. Stockwell Andrew M. P. McDonnell 2020-11-01T00:00:00Z https://doi.org/10.3389/fmars.2020.548931 https://doaj.org/article/2e6d73c1f32d48edb8cf879d53efedaf EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/fmars.2020.548931/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2020.548931 https://doaj.org/article/2e6d73c1f32d48edb8cf879d53efedaf Frontiers in Marine Science, Vol 7 (2020) carbon cycling particulate organic carbon Bering and Chukchi Sea Shelves marine particles marine snow Arctic Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2020 ftdoajarticles https://doi.org/10.3389/fmars.2020.548931 2022-12-31T13:36:58Z The shallow Pacific Arctic shelf has historically acted as an effective carbon sink, characterized by tight benthic pelagic coupling. However, the strength of the biological carbon pump in the Arctic has been predicted to weaken with climate change due to increased duration of the open-water period for primary production, enhanced nutrient limitation, and increased pelagic heterotrophy. In order to gain insights into how the biological carbon pump is functioning under the recent conditions of extreme warming and sea ice loss on the Pacific Arctic shelf, we measured sinking particulate organic carbon (POC) fluxes with drifting and moored sediment traps, as well as rates of primary production and particle-associated microbial respiration during June 2018. In Bering Shelf/Anadyr Water masses, sinking POC fluxes ranged from 0.8 to 2.3 g C m–2 day–1, making them among the highest fluxes ever documented in the global oceans. Furthermore, high export ratios averaging 82% and low rates of particle-associated microbial respiration also indicated negligible recycling of sinking POC in the water column. These results highlight the extraordinary strength of the biological carbon pump on the Pacific Arctic shelf during an unusually warm and low-sea ice year. While additional measurements and time are needed to confirm the ultimate trajectory of these fluxes in response to ongoing climate change, these results do not support the prevailing hypothesis that the strength of the biological carbon pump in the Pacific Arctic will weaken under these conditions. Article in Journal/Newspaper Anadyr Anadyr' Arctic Chukchi Chukchi Sea Climate change Pacific Arctic Sea ice Directory of Open Access Journals: DOAJ Articles Anadyr ENVELOPE(177.510,177.510,64.734,64.734) Anadyr’ ENVELOPE(176.233,176.233,64.882,64.882) Arctic Bering Shelf ENVELOPE(-170.783,-170.783,60.128,60.128) Chukchi Sea Pacific Frontiers in Marine Science 7 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
carbon cycling particulate organic carbon Bering and Chukchi Sea Shelves marine particles marine snow Arctic Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
carbon cycling particulate organic carbon Bering and Chukchi Sea Shelves marine particles marine snow Arctic Science Q General. Including nature conservation geographical distribution QH1-199.5 Stephanie H. O’Daly Seth L. Danielson Sarah M. Hardy Russell R. Hopcroft Catherine Lalande Dean A. Stockwell Andrew M. P. McDonnell Extraordinary Carbon Fluxes on the Shallow Pacific Arctic Shelf During a Remarkably Warm and Low Sea Ice Period |
topic_facet |
carbon cycling particulate organic carbon Bering and Chukchi Sea Shelves marine particles marine snow Arctic Science Q General. Including nature conservation geographical distribution QH1-199.5 |
description |
The shallow Pacific Arctic shelf has historically acted as an effective carbon sink, characterized by tight benthic pelagic coupling. However, the strength of the biological carbon pump in the Arctic has been predicted to weaken with climate change due to increased duration of the open-water period for primary production, enhanced nutrient limitation, and increased pelagic heterotrophy. In order to gain insights into how the biological carbon pump is functioning under the recent conditions of extreme warming and sea ice loss on the Pacific Arctic shelf, we measured sinking particulate organic carbon (POC) fluxes with drifting and moored sediment traps, as well as rates of primary production and particle-associated microbial respiration during June 2018. In Bering Shelf/Anadyr Water masses, sinking POC fluxes ranged from 0.8 to 2.3 g C m–2 day–1, making them among the highest fluxes ever documented in the global oceans. Furthermore, high export ratios averaging 82% and low rates of particle-associated microbial respiration also indicated negligible recycling of sinking POC in the water column. These results highlight the extraordinary strength of the biological carbon pump on the Pacific Arctic shelf during an unusually warm and low-sea ice year. While additional measurements and time are needed to confirm the ultimate trajectory of these fluxes in response to ongoing climate change, these results do not support the prevailing hypothesis that the strength of the biological carbon pump in the Pacific Arctic will weaken under these conditions. |
format |
Article in Journal/Newspaper |
author |
Stephanie H. O’Daly Seth L. Danielson Sarah M. Hardy Russell R. Hopcroft Catherine Lalande Dean A. Stockwell Andrew M. P. McDonnell |
author_facet |
Stephanie H. O’Daly Seth L. Danielson Sarah M. Hardy Russell R. Hopcroft Catherine Lalande Dean A. Stockwell Andrew M. P. McDonnell |
author_sort |
Stephanie H. O’Daly |
title |
Extraordinary Carbon Fluxes on the Shallow Pacific Arctic Shelf During a Remarkably Warm and Low Sea Ice Period |
title_short |
Extraordinary Carbon Fluxes on the Shallow Pacific Arctic Shelf During a Remarkably Warm and Low Sea Ice Period |
title_full |
Extraordinary Carbon Fluxes on the Shallow Pacific Arctic Shelf During a Remarkably Warm and Low Sea Ice Period |
title_fullStr |
Extraordinary Carbon Fluxes on the Shallow Pacific Arctic Shelf During a Remarkably Warm and Low Sea Ice Period |
title_full_unstemmed |
Extraordinary Carbon Fluxes on the Shallow Pacific Arctic Shelf During a Remarkably Warm and Low Sea Ice Period |
title_sort |
extraordinary carbon fluxes on the shallow pacific arctic shelf during a remarkably warm and low sea ice period |
publisher |
Frontiers Media S.A. |
publishDate |
2020 |
url |
https://doi.org/10.3389/fmars.2020.548931 https://doaj.org/article/2e6d73c1f32d48edb8cf879d53efedaf |
long_lat |
ENVELOPE(177.510,177.510,64.734,64.734) ENVELOPE(176.233,176.233,64.882,64.882) ENVELOPE(-170.783,-170.783,60.128,60.128) |
geographic |
Anadyr Anadyr’ Arctic Bering Shelf Chukchi Sea Pacific |
geographic_facet |
Anadyr Anadyr’ Arctic Bering Shelf Chukchi Sea Pacific |
genre |
Anadyr Anadyr' Arctic Chukchi Chukchi Sea Climate change Pacific Arctic Sea ice |
genre_facet |
Anadyr Anadyr' Arctic Chukchi Chukchi Sea Climate change Pacific Arctic Sea ice |
op_source |
Frontiers in Marine Science, Vol 7 (2020) |
op_relation |
https://www.frontiersin.org/articles/10.3389/fmars.2020.548931/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2020.548931 https://doaj.org/article/2e6d73c1f32d48edb8cf879d53efedaf |
op_doi |
https://doi.org/10.3389/fmars.2020.548931 |
container_title |
Frontiers in Marine Science |
container_volume |
7 |
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1766380729253494784 |