Quantifying the time lag between organic matter production and export in the surface ocean: Implications for estimates of export efficiency.

Stange, Paul, Bach, Lennart T. , Le Moigne, Frederic A. C. , Taucher, Jan , Boxhammer, Tim and Riebesell, Ulf (2017) Quantifying the time lag between organic matter production and export in the surface ocean: Implications for estimates of export efficiency. Open Access Geophysical Research Letters, 44 (1). pp. 268-276. DOI 10.1002/2016GL070875.

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Abstract

The ocean's potential to export carbon to depth partly depends on the fraction of primary production (PP) sinking out of the euphotic zone (i.e., the e-ratio). Measurements of PP and export flux are often performed simultaneously in the field, although there is a temporal delay between those parameters. Thus, resulting e-ratio estimates often incorrectly assume an instantaneous downward export of PP to export flux. Evaluating results from four mesocosm studies, we find that peaks in organic matter sedimentation lag chlorophyll a peaks by 2 to 15 days. We discuss the implications of these time lags (TLs) for current e-ratio estimates and evaluate potential controls of TL. Our analysis reveals a strong correlation between TL and the duration of chlorophyll a buildup, indicating a dependency of TL on plankton food web dynamics. This study is one step further toward time-corrected e-ratio estimates

Document Type: Article
Funder compliance: info:eu-repo/grantAgreement/EC/FP7/228224 ; info:eu-repo/grantAgreement/EC/FP7/211384
Keywords: carbon export; biological pump; time lag; mesocosm; export efficiency; plankton community
Research affiliation: OceanRep > The Future Ocean - Cluster of Excellence
OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-BI Biological Oceanography
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1002/2016GL070875
ISSN: 0094-8276
Projects: KOSMOS, BIOACID, SOPRAN, MESOAQUA, EPOCA, Future Ocean
Expeditions/Models/Experiments:
Date Deposited: 09 Jan 2017 08:15
Last Modified: 27 May 2019 09:17
URI: http://oceanrep.geomar.de/id/eprint/35505

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