Summertime Chlorophyll a and Particulate Organic Carbon Standing Stocks in Surface Waters of the Fram Strait and the Arctic Ocean (1991–2015)
Sea ice in the Arctic Ocean (AO) has been undergoing dramatic changes during the last two decades. In addition, the water temperature of the inflow of Atlantic water masses at the gateway Fram Strait has recently increased. Long-term data may help to evaluate the impact of these physical changes on...
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ftdoajarticles:oai:doaj.org/article:f6a6f1b092644722968230de2542e834 2023-05-15T14:59:06+02:00 Summertime Chlorophyll a and Particulate Organic Carbon Standing Stocks in Surface Waters of the Fram Strait and the Arctic Ocean (1991–2015) Eva-Maria Nöthig Simon Ramondenc Antonie Haas Laura Hehemann Andreas Walter Astrid Bracher Catherine Lalande Katja Metfies Ilka Peeken Eduard Bauerfeind Antje Boetius 2020-06-01T00:00:00Z https://doi.org/10.3389/fmars.2020.00350 https://doaj.org/article/f6a6f1b092644722968230de2542e834 EN eng Frontiers Media S.A. https://www.frontiersin.org/article/10.3389/fmars.2020.00350/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2020.00350 https://doaj.org/article/f6a6f1b092644722968230de2542e834 Frontiers in Marine Science, Vol 7 (2020) long-term data summertime surface waters chlorophyll a particulate organic carbon Fram Strait and Arctic Ocean Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2020 ftdoajarticles https://doi.org/10.3389/fmars.2020.00350 2022-12-31T03:37:28Z Sea ice in the Arctic Ocean (AO) has been undergoing dramatic changes during the last two decades. In addition, the water temperature of the inflow of Atlantic water masses at the gateway Fram Strait has recently increased. Long-term data may help to evaluate the impact of these physical changes on the biological processes in surface waters. Over a 25-year period, and mostly in summer, water samples were collected at discrete depths within the uppermost 100 m of the Fram Strait and other regions of the AO to investigate chlorophyll a (Chl a) and particulate organic carbon (POC) standing stocks. Stations sampled from 1991 to 2015 were located in the Fram Strait, Barents Sea (BS), on the Eurasian shelf, and over the Nansen, Amundsen, and parts of the Amerasian basins (AB). Discrete Chl a and POC measurements obtained during 33 and 24 expeditions, respectively, were integrated over the upper 100 m of the water column to monitor spatial and interannual variations in distribution patterns of standing stocks. In general, the highest Chl a and POC standing stocks were observed in the eastern Fram Strait (EFS) and in the BS, while the lowest biomasses were observed in the heavily ice-covered regions of the central AO, mainly in the Amundsen and ABs. Whereas summertime Chl a stocks sharply decreased northward from the Fram Strait and Barents Sea toward high latitudes, the decline in POC standing stocks was less pronounced. Over the sampling period, summertime Chl a stocks slightly increased in the EFS but remained more or less constant in the central AO. In contrast to Chl a, standing stocks of POC eventually increased over the last 25 years in the central AO, possibly as an effect of increasing air temperatures, decreasing sea ice extent and thickness, and increasing light availability. Moreover, variations in riverine discharge and in sea ice export within the Transpolar Drift may have contributed to the enhanced POC stock in the central AO surface waters. Overall, the objective of the present study was to provide ... Article in Journal/Newspaper Arctic Arctic Ocean Barents Sea Fram Strait Sea ice Directory of Open Access Journals: DOAJ Articles Arctic Arctic Ocean Barents Sea Frontiers in Marine Science 7 |
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Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
long-term data summertime surface waters chlorophyll a particulate organic carbon Fram Strait and Arctic Ocean Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
long-term data summertime surface waters chlorophyll a particulate organic carbon Fram Strait and Arctic Ocean Science Q General. Including nature conservation geographical distribution QH1-199.5 Eva-Maria Nöthig Simon Ramondenc Antonie Haas Laura Hehemann Andreas Walter Astrid Bracher Catherine Lalande Katja Metfies Ilka Peeken Eduard Bauerfeind Antje Boetius Summertime Chlorophyll a and Particulate Organic Carbon Standing Stocks in Surface Waters of the Fram Strait and the Arctic Ocean (1991–2015) |
topic_facet |
long-term data summertime surface waters chlorophyll a particulate organic carbon Fram Strait and Arctic Ocean Science Q General. Including nature conservation geographical distribution QH1-199.5 |
description |
Sea ice in the Arctic Ocean (AO) has been undergoing dramatic changes during the last two decades. In addition, the water temperature of the inflow of Atlantic water masses at the gateway Fram Strait has recently increased. Long-term data may help to evaluate the impact of these physical changes on the biological processes in surface waters. Over a 25-year period, and mostly in summer, water samples were collected at discrete depths within the uppermost 100 m of the Fram Strait and other regions of the AO to investigate chlorophyll a (Chl a) and particulate organic carbon (POC) standing stocks. Stations sampled from 1991 to 2015 were located in the Fram Strait, Barents Sea (BS), on the Eurasian shelf, and over the Nansen, Amundsen, and parts of the Amerasian basins (AB). Discrete Chl a and POC measurements obtained during 33 and 24 expeditions, respectively, were integrated over the upper 100 m of the water column to monitor spatial and interannual variations in distribution patterns of standing stocks. In general, the highest Chl a and POC standing stocks were observed in the eastern Fram Strait (EFS) and in the BS, while the lowest biomasses were observed in the heavily ice-covered regions of the central AO, mainly in the Amundsen and ABs. Whereas summertime Chl a stocks sharply decreased northward from the Fram Strait and Barents Sea toward high latitudes, the decline in POC standing stocks was less pronounced. Over the sampling period, summertime Chl a stocks slightly increased in the EFS but remained more or less constant in the central AO. In contrast to Chl a, standing stocks of POC eventually increased over the last 25 years in the central AO, possibly as an effect of increasing air temperatures, decreasing sea ice extent and thickness, and increasing light availability. Moreover, variations in riverine discharge and in sea ice export within the Transpolar Drift may have contributed to the enhanced POC stock in the central AO surface waters. Overall, the objective of the present study was to provide ... |
format |
Article in Journal/Newspaper |
author |
Eva-Maria Nöthig Simon Ramondenc Antonie Haas Laura Hehemann Andreas Walter Astrid Bracher Catherine Lalande Katja Metfies Ilka Peeken Eduard Bauerfeind Antje Boetius |
author_facet |
Eva-Maria Nöthig Simon Ramondenc Antonie Haas Laura Hehemann Andreas Walter Astrid Bracher Catherine Lalande Katja Metfies Ilka Peeken Eduard Bauerfeind Antje Boetius |
author_sort |
Eva-Maria Nöthig |
title |
Summertime Chlorophyll a and Particulate Organic Carbon Standing Stocks in Surface Waters of the Fram Strait and the Arctic Ocean (1991–2015) |
title_short |
Summertime Chlorophyll a and Particulate Organic Carbon Standing Stocks in Surface Waters of the Fram Strait and the Arctic Ocean (1991–2015) |
title_full |
Summertime Chlorophyll a and Particulate Organic Carbon Standing Stocks in Surface Waters of the Fram Strait and the Arctic Ocean (1991–2015) |
title_fullStr |
Summertime Chlorophyll a and Particulate Organic Carbon Standing Stocks in Surface Waters of the Fram Strait and the Arctic Ocean (1991–2015) |
title_full_unstemmed |
Summertime Chlorophyll a and Particulate Organic Carbon Standing Stocks in Surface Waters of the Fram Strait and the Arctic Ocean (1991–2015) |
title_sort |
summertime chlorophyll a and particulate organic carbon standing stocks in surface waters of the fram strait and the arctic ocean (1991–2015) |
publisher |
Frontiers Media S.A. |
publishDate |
2020 |
url |
https://doi.org/10.3389/fmars.2020.00350 https://doaj.org/article/f6a6f1b092644722968230de2542e834 |
geographic |
Arctic Arctic Ocean Barents Sea |
geographic_facet |
Arctic Arctic Ocean Barents Sea |
genre |
Arctic Arctic Ocean Barents Sea Fram Strait Sea ice |
genre_facet |
Arctic Arctic Ocean Barents Sea Fram Strait Sea ice |
op_source |
Frontiers in Marine Science, Vol 7 (2020) |
op_relation |
https://www.frontiersin.org/article/10.3389/fmars.2020.00350/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2020.00350 https://doaj.org/article/f6a6f1b092644722968230de2542e834 |
op_doi |
https://doi.org/10.3389/fmars.2020.00350 |
container_title |
Frontiers in Marine Science |
container_volume |
7 |
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1766331234266382336 |