Mesoscale eddies and Trichodesmium spp. distributions in the southwestern North Atlantic

Thumbnail Image
Olson, Elise M. B.
McGillicuddy, Dennis J.
Flierl, Glenn R.
Davis, Cabell S.
Dyhrman, Sonya T.
Waterbury, John B.
Alternative Title
Date Created
Related Materials
Replaced By
Eddy-wind interaction
Amazon plume
Video plankton recorder
Correlations of Trichodesmium colony abundance with the eddy field emerged in two segments of Video Plankton Recorder observations made in the southwestern North Atlantic during fall 2010 and spring 2011. In fall 2010, local maxima in abundance were observed in cyclones. We hypothesized surface Ekman transport convergence as a mechanism for trapping buoyant colonies in cyclones. Idealized models supported the potential of this process to influence the distribution of buoyant colonies over time scales of several months. In spring 2011, the highest vertically integrated colony abundances were observed in anticyclones. These peaks in abundance correlated with anomalously fresh water, suggesting riverine input as a driver of the relationship. These contrasting results in cyclones and anticyclones highlight distinct mechanisms by which mesoscale eddies can influence the abundance and distribution of Trichodesmium populations of the southwestern North Atlantic.
© The Author(s), 2015. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Journal of Geophysical Research: Oceans 120 (2015): 4129–4150, doi:10.1002/2015JC010728.
Embargo Date
Journal of Geophysical Research: Oceans 120 (2015): 4129–4150
Cruise ID
Cruise DOI
Vessel Name
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivatives 4.0 International