Stange, Paul
[Author];
Bach, Lennart T.
[Author];
Le Moigne, Frederic A. C.
[Author];
Taucher, Jan
[Author];
Boxhammer, Tim
[Author];
Riebesell, Ulf
[Author]
Quantifying the time lag between organic matter production and export in the surface ocean: Implications for estimates of export efficiency
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Media type:
E-Article
Title:
Quantifying the time lag between organic matter production and export in the surface ocean: Implications for estimates of export efficiency
Contributor:
Stange, Paul
[Author];
Bach, Lennart T.
[Author];
Le Moigne, Frederic A. C.
[Author];
Taucher, Jan
[Author];
Boxhammer, Tim
[Author];
Riebesell, Ulf
[Author]
Footnote:
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Description:
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