Inter-Annual Variability of Organic Carbon Concentration in the Eastern Fram Strait During Summer (2009–2017)
The Arctic Ocean plays a key role in regulating the global climate, while being highly sensitive to climate change. Temperature in the Arctic increases faster than the global average, causing a loss of multiyear sea-ice and affecting marine ecosystem structure and functioning. As a result, Arctic pr...
Published in: | Frontiers in Marine Science |
---|---|
Main Authors: | , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
2019
|
Subjects: | |
Online Access: | https://epic.awi.de/id/eprint/49658/ https://www.frontiersin.org/articles/10.3389/fmars.2019.00187/full https://hdl.handle.net/10013/epic.d144b85f-c4e1-474b-bf7c-02487b4f7f3f |
id |
ftawi:oai:epic.awi.de:49658 |
---|---|
record_format |
openpolar |
spelling |
ftawi:oai:epic.awi.de:49658 2023-05-15T14:48:20+02:00 Inter-Annual Variability of Organic Carbon Concentration in the Eastern Fram Strait During Summer (2009–2017) Engel, Anja Bracher, Astrid Dinter, Tilman Endres, Sonja Grosse, Julia Metfies, Katja Peeken, Ilka Piontek, Judith Salter, Ian Nöthig, Eva-Maria 2019-04-24 https://epic.awi.de/id/eprint/49658/ https://www.frontiersin.org/articles/10.3389/fmars.2019.00187/full https://hdl.handle.net/10013/epic.d144b85f-c4e1-474b-bf7c-02487b4f7f3f unknown Engel, A. , Bracher, A. , Dinter, T. , Endres, S. , Grosse, J. , Metfies, K. orcid:0000-0003-3073-8033 , Peeken, I. , Piontek, J. , Salter, I. and Nöthig, E. M. orcid:0000-0002-7527-7827 (2019) Inter-Annual Variability of Organic Carbon Concentration in the Eastern Fram Strait During Summer (2009–2017) , Frontiers in Marine Science . doi:10.3389/fmars.2019.00187 <https://doi.org/10.3389/fmars.2019.00187> , hdl:10013/epic.d144b85f-c4e1-474b-bf7c-02487b4f7f3f EPIC3Frontiers in Marine Science Article isiRev 2019 ftawi https://doi.org/10.3389/fmars.2019.00187 2021-12-24T15:44:42Z The Arctic Ocean plays a key role in regulating the global climate, while being highly sensitive to climate change. Temperature in the Arctic increases faster than the global average, causing a loss of multiyear sea-ice and affecting marine ecosystem structure and functioning. As a result, Arctic primary production and biogeochemical cycling are changing. Here, we investigated inter-annual changes in the concentrations of particulate and dissolved organic carbon (POC, DOC) together with biological drivers, such as phyto- and bacterioplankton abundance in the Fram Strait, the Atlantic gateway to the Central Arctic Ocean. Data have been collected in summer at the Long-Term Ecological Research observatory HAUSGARTEN during eight cruises from 2009 to 2017. Our results suggest that the dynamic physical system of the Fram Strait induces strong heterogeneity of the ecosystem that displays considerable intra-seasonal as well as inter-annual variability. Over the observational period, DOC concentrations were significantly negatively related to temperature and salinity, suggesting that outflow of Central Arctic waters carrying a high DOC load is the main control of DOC concentration in this region. POC concentration was not linked to temperature or salinity but tightly related to phytoplankton biomass as estimated from chlorophyll-a concentrations (Chl-a). For the years 2009–2017, no temporal trends in the depth-integrated (0–100 m) amounts of DOC and Chl-a were observed. In contrast, depth-integrated (0–100 m) amounts of POC, as well as the ratio [POC]:[TOC], decreased significantly over time. This suggests a higher partitioning of organic carbon into the dissolved phase. Potential causes and consequences of the observed changes in organic carbon stocks for food-web structure and CO2 sequestration are discussed. Article in Journal/Newspaper Arctic Arctic Ocean Climate change Fram Strait Phytoplankton Sea ice Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Arctic Arctic Ocean Frontiers in Marine Science 6 |
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 Arctic Ocean plays a key role in regulating the global climate, while being highly sensitive to climate change. Temperature in the Arctic increases faster than the global average, causing a loss of multiyear sea-ice and affecting marine ecosystem structure and functioning. As a result, Arctic primary production and biogeochemical cycling are changing. Here, we investigated inter-annual changes in the concentrations of particulate and dissolved organic carbon (POC, DOC) together with biological drivers, such as phyto- and bacterioplankton abundance in the Fram Strait, the Atlantic gateway to the Central Arctic Ocean. Data have been collected in summer at the Long-Term Ecological Research observatory HAUSGARTEN during eight cruises from 2009 to 2017. Our results suggest that the dynamic physical system of the Fram Strait induces strong heterogeneity of the ecosystem that displays considerable intra-seasonal as well as inter-annual variability. Over the observational period, DOC concentrations were significantly negatively related to temperature and salinity, suggesting that outflow of Central Arctic waters carrying a high DOC load is the main control of DOC concentration in this region. POC concentration was not linked to temperature or salinity but tightly related to phytoplankton biomass as estimated from chlorophyll-a concentrations (Chl-a). For the years 2009–2017, no temporal trends in the depth-integrated (0–100 m) amounts of DOC and Chl-a were observed. In contrast, depth-integrated (0–100 m) amounts of POC, as well as the ratio [POC]:[TOC], decreased significantly over time. This suggests a higher partitioning of organic carbon into the dissolved phase. Potential causes and consequences of the observed changes in organic carbon stocks for food-web structure and CO2 sequestration are discussed. |
format |
Article in Journal/Newspaper |
author |
Engel, Anja Bracher, Astrid Dinter, Tilman Endres, Sonja Grosse, Julia Metfies, Katja Peeken, Ilka Piontek, Judith Salter, Ian Nöthig, Eva-Maria |
spellingShingle |
Engel, Anja Bracher, Astrid Dinter, Tilman Endres, Sonja Grosse, Julia Metfies, Katja Peeken, Ilka Piontek, Judith Salter, Ian Nöthig, Eva-Maria Inter-Annual Variability of Organic Carbon Concentration in the Eastern Fram Strait During Summer (2009–2017) |
author_facet |
Engel, Anja Bracher, Astrid Dinter, Tilman Endres, Sonja Grosse, Julia Metfies, Katja Peeken, Ilka Piontek, Judith Salter, Ian Nöthig, Eva-Maria |
author_sort |
Engel, Anja |
title |
Inter-Annual Variability of Organic Carbon Concentration in the Eastern Fram Strait During Summer (2009–2017) |
title_short |
Inter-Annual Variability of Organic Carbon Concentration in the Eastern Fram Strait During Summer (2009–2017) |
title_full |
Inter-Annual Variability of Organic Carbon Concentration in the Eastern Fram Strait During Summer (2009–2017) |
title_fullStr |
Inter-Annual Variability of Organic Carbon Concentration in the Eastern Fram Strait During Summer (2009–2017) |
title_full_unstemmed |
Inter-Annual Variability of Organic Carbon Concentration in the Eastern Fram Strait During Summer (2009–2017) |
title_sort |
inter-annual variability of organic carbon concentration in the eastern fram strait during summer (2009–2017) |
publishDate |
2019 |
url |
https://epic.awi.de/id/eprint/49658/ https://www.frontiersin.org/articles/10.3389/fmars.2019.00187/full https://hdl.handle.net/10013/epic.d144b85f-c4e1-474b-bf7c-02487b4f7f3f |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Climate change Fram Strait Phytoplankton Sea ice |
genre_facet |
Arctic Arctic Ocean Climate change Fram Strait Phytoplankton Sea ice |
op_source |
EPIC3Frontiers in Marine Science |
op_relation |
Engel, A. , Bracher, A. , Dinter, T. , Endres, S. , Grosse, J. , Metfies, K. orcid:0000-0003-3073-8033 , Peeken, I. , Piontek, J. , Salter, I. and Nöthig, E. M. orcid:0000-0002-7527-7827 (2019) Inter-Annual Variability of Organic Carbon Concentration in the Eastern Fram Strait During Summer (2009–2017) , Frontiers in Marine Science . doi:10.3389/fmars.2019.00187 <https://doi.org/10.3389/fmars.2019.00187> , hdl:10013/epic.d144b85f-c4e1-474b-bf7c-02487b4f7f3f |
op_doi |
https://doi.org/10.3389/fmars.2019.00187 |
container_title |
Frontiers in Marine Science |
container_volume |
6 |
_version_ |
1766319425208713216 |