Water Mass Seasonal Variability in the Galápagos Archipelago
William
V
Sweet, North Carolina State University, wvsweet@ncsu.edu
John
M
Morrison, University of North Carolina Wilmington, morrisonj@uncw.edu
(Presenting)
Daniel
Kamykowski, North Carolina State University, dan_kamykowski@ncsu.edu
Blake
A
Schaeffer, US EPA Health and Environmental Effects Research Laboratory, blakeschaeffer@gmail.com
Stuart
Banks, Charles Darwin Research Station, sbanks@fcdarwin.org.ec
Antia
McColluch, North Carolina State University, amccolluch@ncsu.edu
Three hydrographic surveys were conducted within the Galápagos Archipelago during 2005-2006. The surveys captured the surface properties (34, throughout the archipelago. Equatorial Surface Waters are present west of Isabela, where the EUC upwells as it interacts with the Galápagos platform. They also are found east of the archipelago in the cold tongue, which extends westward from South America, and therefore may be advected by the SEC into the archipelago. The upwelling west of Isabela creates a consistently shallow 20°C isotherm (thermocline), which remains elevated across the archipelago. Linear extrapolation of the thermocline depth along the equator from 110° to 95°W gives a good approximation of the thermocline depth within the archipelago from 92° to 89°W.
This project was supported by NASA&rsquos Biodiversity and Ecological Forecasting grant NNG04GL98G, Counterpart US-AID No. 518-A-00-03-00152-00 to the Charles Darwin Research Station and UK Darwin Initiative Project No. 14-048.
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