Continuous DeltaO2/Ar measurements as a proxy for net community production during the MOSAiC campaign in the central Arctic Ocean


Contact
Sebastian.Rokitta [ at ] awi.de

Abstract

To investigate the balance between net photo- and heterotrophy throughout the Arctic autumn-winter-spring transition, we assessed the abundances of O2 and Ar in surface waters by means of membrane-inlet mass spectrometry . We derived biologically mediated O2 super-/undersaturation (ΔO2/Ar), reflecting the difference between gross primary production and the community’s combined autotrophic and heterotrophic respiration (i.e., ‘net community production’, NCP). We present first results on the magnitude of NCP over the autumn-winter-spring transition and extrapolate biological carbon drawdown and release. Further correlation with biological and chemical parameters assessed during MOSAiC is used to identify the controls on net community production and to better understand the ecological mechanisms that drive biogeochemical fluxes in the rapidly changing Arctic.



Item Type
Conference (Talk)
Authors
Divisions
Primary Division
Programs
Primary Topic
Helmholtz Cross Cutting Activity (2021-2027)
N/A
Peer revision
Not peer-reviewed
Publication Status
Published
Event Details
MOSAiC conference, 25 Apr 2022 - 29 Apr 2022, Potsdam, Germany.
Eprint ID
56133
Cite as
Rokitta, S. D. , Chamberlain, E. J. , Fong, A. , D'Angelo, A. , Ulfsbo, A. , Hoppe, C. J. , Bowman, J. S. , Loose, B. and Rost, B. (2022): Continuous DeltaO2/Ar measurements as a proxy for net community production during the MOSAiC campaign in the central Arctic Ocean , MOSAiC conference, Potsdam, Germany, 25 April 2022 - 29 April 2022 .


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Campaigns
PS > 122/1 (MOSAiC20192020)
PS > 122/2 (MOSAiC20192020)
PS > 122/3 (MOSAiC20192020)
PS > 122/4 (MOSAiC20192020)
PS > 122/5 (MOSAiC20192020)
PS > 122/6 (MOSAiC20192020)


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