The Subduction experiment : mooring field program and data summary ; Sub 1 June 1991-February 1992 ; Sub 2 February 1992-October 1992 ; Sub 3 October 1992-June 1993

Funding provided by the Office of Naval Research underContract No. N00014-90-J-1490.

An array of five surface moorings carrying meteorological and oceanographic instrumentation was deployed for a period oftwo years beginning in June 1991 as part of an Office of Naval Research (ONR) funded Subduction experiment. Three eight monthdeployments were carried out. The five mooring locations were 18°N 34°W, 18°N 22°W, 25.5°N 29°W, 33°N 22°W and 33°N 34°W.Two Woods Hole Oceanographic Institution (WHOI) and three Scripps Institution of Oceanography (SIO) mooringscollected oceanographic and meteorological data, using a 3-meter discus or 2-meter toroid buoy and multiple Vector MeasuringCurrent Meters (VMCMs), an Acoustic Doppler Current Profiler (ADCP) and Brancker temperature recorders (tpods). The surfacebuoys carried a Vector Averaging Wind Recorder (VAWR) and, on four of the five moorings, an Improved Meteorological Recorder(IMET) which measured wind speed and wind direction, sea surface temperature, air temperature, short wave radiation,barometric pressure and relative humidity. The IMET also measured precipitation. The VMCMs, ADCP and tpods, placed at depths1 m to 3500 m, measured oceanic velocities and temperatures.This report presents meteorological and oceanographic data from the WHOI Upper Ocean Processes Group (UOP) and theSIO Instrument and Development Group (lDG) instruments and contains summaries of the instruments used, their depths, mooringpositions, mooring deployment and recovery times, and data return. Appendices contain information on supplementary Subductiondata sets.