MODIS images show recurring coccolithophore bloom near the Patagonia Shelf
Coccolithophores, a type of phytoplankton, are one-celled, microscopic marine plants that live in large numbers throughout the upper layers of the ocean. They surround themselves with minute calcium carbonate plates called “coccoliths,” which are highly reflective such that populations of these plants can be seen from space. Near the Patagonia Shelf, located east of Argentina and Uruguay, ocean waters thrive with high concentrations of microscopic phytoplankton—e.g., coccolithiphores, dinoflagellates, and diatoms to name a few. That is because in this region the warm, saline, southward-flowing Brazil Current flows past and mixes with the cool, less-saline, nutrient-rich northward-flowing Falklands/Malvinas Current, creating an ideal environment for biological productivity. Scientists use true color satellite images like these, taken by Aqua/MODIS from December 15, 2010 to February 15, 2011, to observe the recurring coccolithophore blooms in the Patagonia Shelf region and study the impacts of ocean acidification on these microscopic organisms. Imagery from these two months shows a coccolithophore bloom (turquoise) near the shelf break. The shelf's unique ecosystem supports important fisheries in the region, providing a favorable reproductive habitat for anchovies and sardines.
Please give credit for this item to: NASA's Goddard Space Flight Center
Acknowledgements: Shipboard verification that the elevated reflectance in the imagery was produced by coccolithophores was performed by the Balch laboratory group at the Bigelow Laboratory for Ocean Sciences (E. Boothbay, ME) operating on the R/V Melville and R/V Revelle, operated by Scripps Inst. of Oceanography (La Jolla, CA). N. Kuring (Ocean Color Group, NASA Goddard) provided the real-time PIC imagery to the research vessels at sea in order to guide the coccolithophore sampling.
Data source: This visualization was created from MODIS level 1 radiance and geolocation hdf data files from LAADS Web
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Data Used: Aqua/MODIS/True Color Aqua/MODIS
Note: While we identify the data sets used in these visualizations, we do not store any further details nor the data sets themselves on our site.
GCMD keywords can be found on the Internet with the following citation:
Olsen, L.M., G. Major, K. Shein, J. Scialdone, S. Ritz, T. Stevens, M. Morahan, A. Aleman, R. Vogel, S. Leicester, H. Weir, M. Meaux, S. Grebas, C.Solomon, M. Holland, T. Northcutt, R. A. Restrepo, R. Bilodeau, 2013. NASA/Global Change Master Directory (GCMD) Earth Science Keywords. Version 220.127.116.11.0