The seasonal cycle of ocean-atmosphere CO2 flux in Ryder Bay, West Antarctic Peninsula

Oliver J. Legge; Dorothee C. E. Bakker; Martin T. Johnson; Mike P. Meredith; Hugh J. Venables; Pete J.  Brown; Gareth A. Lee

doi:10.1002/2015GL063796

The seasonal cycle of ocean-atmosphere CO₂ flux in Ryder Bay, West Antarctic Peninsula

Oliver J. Legge, Dorothee C. E. Bakker, Martin T. Johnson, Mike P. Meredith, Hugh J. Venables, Pete J. Brown, Gareth A. Lee

Research output: Contribution to journal › Article › peer-review

43 Citations (Scopus)

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Abstract

Approximately 15 million km² of the Southern Ocean is seasonally ice covered, yet the processes affecting carbon cycling and gas exchange in this climatically important region remain inadequately understood. Here, 3 years of dissolved inorganic carbon (DIC) measurements and carbon dioxide (CO₂) fluxes from Ryder Bay on the west Antarctic Peninsula (WAP) are presented. During spring and summer, primary production in the surface ocean promotes atmospheric CO₂ uptake. In winter, higher DIC, caused by net heterotrophy and vertical mixing with Circumpolar Deep Water, results in outgassing of CO₂ from the ocean. Ryder Bay is found to be a net sink of atmospheric CO₂ of 0.59–0.94 mol C m⁻² yr⁻¹ (average of 3 years). Seasonal sea ice cover increases the net annual CO₂ uptake, but its effect on gas exchange remains poorly constrained. A reduction in sea ice on the WAP shelf may reduce the strength of the oceanic CO₂ sink in this region.

Original language	English
Pages (from-to)	2934-2942
Number of pages	9
Journal	Geophysical Research Letters
Volume	42
Issue number	8
Early online date	28 Apr 2015
DOIs	https://doi.org/10.1002/2015GL063796
Publication status	Published - 28 Apr 2015

Keywords

ocean-atmosphere CO2 flux
Ryder Bay
seasonal sea ice
polar time series
RaTS
carbon cycling

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1002/2015GL063796

Published manuscript
©2015. The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Final published version, 926 KB

Dorothee Bakker
- D.Bakkeruea.acuk
- School of Environmental Sciences - Professor in Marine Biogeochemistry
- Centre for Ocean and Atmospheric Sciences - Member
- ClimateUEA - Member
Person: Research Group Member, Academic, Teaching & Research

Observations and synthesis to establish variability and trends of oceanic pH.
Watson, A., Bakker, D., Hardman-Mountford, N., Hydes (NOCS), D., Pearce, D. & Schuster, U.
Natural Environment Research Council
1/10/10 → 15/07/13
Project: Research

Cite this

@article{5542942fe9bf467e950dd4b06366b673,

title = "The seasonal cycle of ocean-atmosphere CO2 flux in Ryder Bay, West Antarctic Peninsula",

abstract = "Approximately 15 million km2 of the Southern Ocean is seasonally ice covered, yet the processes affecting carbon cycling and gas exchange in this climatically important region remain inadequately understood. Here, 3 years of dissolved inorganic carbon (DIC) measurements and carbon dioxide (CO2) fluxes from Ryder Bay on the west Antarctic Peninsula (WAP) are presented. During spring and summer, primary production in the surface ocean promotes atmospheric CO2 uptake. In winter, higher DIC, caused by net heterotrophy and vertical mixing with Circumpolar Deep Water, results in outgassing of CO2 from the ocean. Ryder Bay is found to be a net sink of atmospheric CO2 of 0.59–0.94 mol C m−2 yr−1 (average of 3 years). Seasonal sea ice cover increases the net annual CO2 uptake, but its effect on gas exchange remains poorly constrained. A reduction in sea ice on the WAP shelf may reduce the strength of the oceanic CO2 sink in this region.",

keywords = "ocean-atmosphere CO2 flux, Ryder Bay, seasonal sea ice, polar time series, RaTS, carbon cycling",

author = "Legge, {Oliver J.} and Bakker, {Dorothee C. E.} and Johnson, {Martin T.} and Meredith, {Mike P.} and Venables, {Hugh J.} and Brown, {Pete J.} and Lee, {Gareth A.}",

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AU - Legge, Oliver J.

AU - Bakker, Dorothee C. E.

AU - Johnson, Martin T.

AU - Meredith, Mike P.

AU - Venables, Hugh J.

AU - Brown, Pete J.

AU - Lee, Gareth A.

N1 - ©2015. The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

PY - 2015/4/28

Y1 - 2015/4/28

N2 - Approximately 15 million km2 of the Southern Ocean is seasonally ice covered, yet the processes affecting carbon cycling and gas exchange in this climatically important region remain inadequately understood. Here, 3 years of dissolved inorganic carbon (DIC) measurements and carbon dioxide (CO2) fluxes from Ryder Bay on the west Antarctic Peninsula (WAP) are presented. During spring and summer, primary production in the surface ocean promotes atmospheric CO2 uptake. In winter, higher DIC, caused by net heterotrophy and vertical mixing with Circumpolar Deep Water, results in outgassing of CO2 from the ocean. Ryder Bay is found to be a net sink of atmospheric CO2 of 0.59–0.94 mol C m−2 yr−1 (average of 3 years). Seasonal sea ice cover increases the net annual CO2 uptake, but its effect on gas exchange remains poorly constrained. A reduction in sea ice on the WAP shelf may reduce the strength of the oceanic CO2 sink in this region.

AB - Approximately 15 million km2 of the Southern Ocean is seasonally ice covered, yet the processes affecting carbon cycling and gas exchange in this climatically important region remain inadequately understood. Here, 3 years of dissolved inorganic carbon (DIC) measurements and carbon dioxide (CO2) fluxes from Ryder Bay on the west Antarctic Peninsula (WAP) are presented. During spring and summer, primary production in the surface ocean promotes atmospheric CO2 uptake. In winter, higher DIC, caused by net heterotrophy and vertical mixing with Circumpolar Deep Water, results in outgassing of CO2 from the ocean. Ryder Bay is found to be a net sink of atmospheric CO2 of 0.59–0.94 mol C m−2 yr−1 (average of 3 years). Seasonal sea ice cover increases the net annual CO2 uptake, but its effect on gas exchange remains poorly constrained. A reduction in sea ice on the WAP shelf may reduce the strength of the oceanic CO2 sink in this region.

KW - ocean-atmosphere CO2 flux

KW - Ryder Bay

KW - seasonal sea ice

KW - polar time series

KW - RaTS

KW - carbon cycling

U2 - 10.1002/2015GL063796

DO - 10.1002/2015GL063796

M3 - Article

SN - 0094-8276

VL - 42

SP - 2934

EP - 2942

JO - Geophysical Research Letters

JF - Geophysical Research Letters

IS - 8

ER -

The seasonal cycle of ocean-atmosphere CO2 flux in Ryder Bay, West Antarctic Peninsula

Abstract

Keywords

UN SDGs

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Profiles

Dorothee Bakker

Projects

Observations and synthesis to establish variability and trends of oceanic pH.

Cite this

The seasonal cycle of ocean-atmosphere CO₂ flux in Ryder Bay, West Antarctic Peninsula