Subduction experiment
Subtitle: Cruise report R/V Knorr : cruise number 138 Leg XV : subduction 3 mooring recovery cruise, 13-30 June 1993
By: by Richard P. Trask ... [et al.].
Contributors: Trask, Richard P.; Knorr (Ship).; Woods Hole Oceanographic Institution.; Woods Hole Oceanographic Institution. Upper Ocean Processes Group.
Series: WHOI -- 93-54.; UOP technical report -- 93-8.; UOP report -- 93-8.; WHOI (Series) -- 93-54.
Publisher: Woods Hole Oceanographic Institution, Upper Ocean Processes Group
Published: 1993
Place of publication: Woods Hole, Mass
Language: eng
Number of pages: 79
Subjects: Deep-sea moorings.; Oceanographic instruments.; Oceanography -- Research.; Marine meteorology -- Observations.; Ocean-atmosphere interaction.
Other titles: Cruise report R/V Knorr: cruise number 138 Leg XV.; R/V Knorr: cruise number 138 Leg XV.
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 though a combination of Eulerian and Langrangian measurements of velocity, measurements of tracer distributions and hydrographic properties 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 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 transmitting between mooring locations. This report describes the work that took place during R/V Knorr cruise number 138 leg XV which was the fourth scheduled Subduction mooring cruise. During this cruise the moorings previously deployed for a third and final eight month period were recovered. This report includes a description of the moorings and instrumentation that were 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."

"December 1993."

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

Includes bibliographical references (p. 31).

Also issued online.