Supplement to: Ocean Climate Observations and Analyses NTAS Ship Charter

Robert Weller and Albert Plueddemann Woods Hole Oceanographic Institution

Abstract

The Woods Hole Oceanographic Institution (WHOI) Ocean Reference Station (ORS) project is carried out to provide critical, sustained observations of a key region of the ocean – the easterly trade wind region that covers roughly 50% of the ocean surface in a wide belt spanning the equator. To provide continuous, climate-quality observing of the trade wind region, we have developed surface moorings with the capability of making sustained, accurate observations at the sea surface and in the water column, and have chosen and occupied three key trade wind sites. The Northwest Tropical Atlantic Station (NTAS) at 15°N, 51°W is one of three sites maintained by WHOI.

The most recent NTAS mooring turnaround was conducted in December 2014. To maintain a continuous, high-quality time series, the ORS moorings require service at 12-14 months after initial deployment. In order to conduct the NTAS mooring service cruise in January 2016, arrangements have been made for the use of the R/V Endeavor, a University National Oceanographic Laboratory System (UNOLS) vessel operated by the University of Rhode Island. This supplement requests funding for ship time and marine technician support associated with operation of the R/V Endeavor. In addition to the ORS mooring service, the NTAS cruise typically includes operations associated with the Meridional Overturning Variability Experiment (MOVE) under the direction of Dr. Uwe Send of SIO. This funding request will support a cruise plan that accommodates MOVE activities.