TY - JOUR
T1 - The Influence of Sea Ice Cover and Atlantic Water Advection on Annual Particle Export North of Svalbard
AU - Dybwad, C.
AU - Lalande, C.
AU - Bodur, Y. V.
AU - Henley, S. F.
AU - Cottier, F.
AU - Ershova, E. A.
AU - Hobbs, L.
AU - Last, K. S.
AU - Dąbrowska, A. M.
AU - Reigstad, M.
N1 - Funding Information:
The authors are grateful to the Captains, Officers, Crews, and Science Teams onboard the RV Lance A‐TWAIN Cruise in September 2017, the RRS James Clark Ross Cruise JR17006 in June 2018, and the Kronprins Haakon Cruise in November 2019. The authors thank Arild Sundfjord and UK National Marine Facilities for advice and technical support. The authors thank Lewis Drysdale, Luke Mardsen and Rahman Mankettikkara for their assistance in making the datasets available online. The authors thank the three anonymous reviewers for their useful suggestions. This work was jointly funded by UiT The Arctic University of Norway and Tromsø Research Foundation through the Arctic SIZE project (Arctic Seasonal Ice Zone Ecology, project number 01vm/h15), the Nansen Legacy project funded by the Research Council of Norway (project number 276730), and the Arctic PRIZE (PRoductivity in the seasonal Ice ZonE) project (Grant NE/P006302/1, NE/P006086/1) funded by the UK Natural Environment Research Council (NERC) Changing Arctic Ocean program.
Funding Information:
The authors are grateful to the Captains, Officers, Crews, and Science Teams onboard the RV Lance A-TWAIN Cruise in September 2017, the RRS James Clark Ross Cruise JR17006 in June 2018, and the Kronprins Haakon Cruise in November 2019. The authors thank Arild Sundfjord and UK National Marine Facilities for advice and technical support. The authors thank Lewis Drysdale, Luke Mardsen and Rahman Mankettikkara for their assistance in making the datasets available online. The authors thank the three anonymous reviewers for their useful suggestions. This work was jointly funded by UiT The Arctic University of Norway and Tromsø Research Foundation through the Arctic SIZE project (Arctic Seasonal Ice Zone Ecology, project number 01vm/h15), the Nansen Legacy project funded by the Research Council of Norway (project number 276730), and the Arctic PRIZE (PRoductivity in the seasonal Ice ZonE) project (Grant NE/P006302/1, NE/P006086/1) funded by the UK Natural Environment Research Council (NERC) Changing Arctic Ocean program.
Publisher Copyright:
© 2022. The Authors.
PY - 2022/10/4
Y1 - 2022/10/4
N2 - The Arctic Ocean north of Svalbard has recently experienced large sea ice losses and the increasing prominence of Atlantic water advection. To investigate the impact of these ongoing changes on annual particle export, two moorings with sequential sediment traps were deployed in ice-free and seasonally ice-covered waters on the shelf north (NSv) and east (ESv) of Svalbard, collecting sinking particles nearly continuously from October 2017 to October 2018. Vertical export of particulate organic carbon (POC), total particulate matter (TPM), planktonic protists, chlorophyll a, and zooplankton fecal pellets were measured, and swimmers were quantified and identified. Combined with sensor data from the moorings, these time-series measurements provided a first assessment of the factors influencing particle export in this region of the Arctic Ocean. Higher annual TPM and POC fluxes at the ice-free NSv site were primarily driven by the advection of Atlantic water, higher grazing by large copepods, and a wind-induced mixing event during winter. Higher diatom fluxes were observed during spring in the presence of sea ice at the ESv site. Along with sea ice cover, regional differences in Atlantic water advection and the seasonal presence of grazers played a prominent role in the biological carbon pump along the continental shelf off Svalbard.
AB - The Arctic Ocean north of Svalbard has recently experienced large sea ice losses and the increasing prominence of Atlantic water advection. To investigate the impact of these ongoing changes on annual particle export, two moorings with sequential sediment traps were deployed in ice-free and seasonally ice-covered waters on the shelf north (NSv) and east (ESv) of Svalbard, collecting sinking particles nearly continuously from October 2017 to October 2018. Vertical export of particulate organic carbon (POC), total particulate matter (TPM), planktonic protists, chlorophyll a, and zooplankton fecal pellets were measured, and swimmers were quantified and identified. Combined with sensor data from the moorings, these time-series measurements provided a first assessment of the factors influencing particle export in this region of the Arctic Ocean. Higher annual TPM and POC fluxes at the ice-free NSv site were primarily driven by the advection of Atlantic water, higher grazing by large copepods, and a wind-induced mixing event during winter. Higher diatom fluxes were observed during spring in the presence of sea ice at the ESv site. Along with sea ice cover, regional differences in Atlantic water advection and the seasonal presence of grazers played a prominent role in the biological carbon pump along the continental shelf off Svalbard.
U2 - 10.1029/2022JC018897
DO - 10.1029/2022JC018897
M3 - Article
JO - Journal of Geophysical Research: Oceans
JF - Journal of Geophysical Research: Oceans
SN - 2169-9275
M1 - e2022JC018897
ER -