The Woods Hole Oceanographic Institution (WHOI) Hawaii Ocean Timeseries Site (WHOTS),
100 km north of Oahu, Hawaii, is intended to provide long-term, high-quality air-sea fluxes as a
part of the NOAA Climate Observation Program. The WHOTS mooring also serves as a
coordinated part of the Hawaii Ocean Timeseries (HOT) program, contributing to the goals of
observing heat, fresh water and chemical fluxes at a site representative of the oligotrophic North
Pacific Ocean. The approach is to maintain a surface mooring outfitted for meteorological and
oceanographic measurements at a site near 22.75°N, 158°W by successive mooring turnarounds.
These observations will be used to investigate air–sea interaction processes related to climate
This report documents recovery of the ninth WHOTS mooring (WHOTS-9) and
deployment of the tenth mooring (WHOTS-10). Both moorings used Surlyn foam buoys as the
surface element and were outfitted with two Air–Sea Interaction Meteorology (ASIMET)
systems. Each ASIMET system measures, records, and transmits via Argos satellite the surface
meteorological variables necessary to compute air–sea fluxes of heat, moisture and momentum.
The upper 155 m of the moorings were outfitted with oceanographic sensors for the
measurement of temperature, conductivity and velocity in a cooperative effort with R. Lukas of
the University of Hawaii. A pCO2 system and ancillary sensors were installed on the buoys in
cooperation with Chris Sabine at the Pacific Marine Environmental Laboratory. A set of
radiometers were installed in cooperation with Sam Laney at WHOI.
The WHOTS mooring turnaround was done on the NOAA ship Hi’ialakai by the Upper
Ocean Processes Group of the Woods Hole Oceanographic Institution. The cruise took place
between 9 and 16 July 2013. Operations began with deployment of the WHOTS-10 mooring on
10 July. This was followed by meteorological intercomparisons and CTDs. Recovery of the
WHOTS-9 mooring took place on 14 July. This report describes these cruise operations, as well
as some of the in-port operations and pre-cruise buoy preparations.