The Subduction experiment
Subtitle: Cruise report R/V Oceanus : cruise number 250 Legs 1 and 2 : subduction 2 mooring deployment and recovery cruise, 25 January-26 February 1992
By: by Richard P. Trask ... [et al.].
Contributors: Trask, Richard P.; Oceanus (Ship).; Woods Hole Oceanographic Institution.; Woods Hole Oceanographic Institution. Upper Ocean Processes Group.
Series: UOP report -- 93-2.; WHOI -- 93-13.; WHOI (Series) -- 93-13.
Publisher: Woods Hole Oceanographic Institution
Published: 1993
Place of publication: Woods Hole, Mass
Language: eng
Number of pages: 102
Subjects: Deep-sea moorings.; Oceanography -- Research.; Marine meteorology -- Observations.; Ocean-atmosphere interaction.
Other titles: Cruise report R/V Oceanus: cruise number 250 Legs 1 and 2.; R/V Oceanus: cruise number 250 Legs 1 and 2.
Description: Subduction is the mechanism by which water masses formed in the mixed layer and near the surface of the ocean find their way into the upper thermocline. The subduction process and its underlying mechanisms were studied through a combination of Eulerian and Langrangian measurements of velocity, measurements of tracer distrbutions and hydrographic propertes and modeling. An array of five surface moorings carrying meteorological and oceanographic instrumentation were deployed for a period of two years beginning in June 1991 as part of an Office of Naval Research (ONR) funded Subduction experiment. Three eight month deployments were planned. The initial deployment of five surface moorings took place during the third leg of R/V Oceanus cruise number 240. The moorings were deployed at 18N 34W, 18N 22W, 25.5N 29W, 33N 22W and 33N 34W. A Vector Averaging Wind Recorder (VAWR) and an Improved Meteorological Recorder (IMET) collected wind speed and wind direction, sea surface temperature, air temperature, short wave radiation, barometric pressure and relative humidity. The IMET also measured precipitation. The moorings were heavily instrumented below the surface with Vector Measuring Current Meters (VMCM) and single point temperature recorders. Expendable bathythermograph (XBT) data were collected and meteorological observations were made while transitting between mooring locations. This report describes the work that took place during R/V Oceanus cruise 250 which was the second scheduled Subduction mooring cruise. During this cruise the first setting of the moorings were recovered and redeployed for a second eight month period. This report includes a description of the instrumentation that was deployed and recovered, has information about the underway measurements (XBT and meteorological observations) that were made including plots of the data and presents a chronology of the cruise events.
Notes: "Technical report."

"March 1993."

"Funding was provided by the Office of Naval Research under contract N00014-90-J-1490."

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