Rapid_Climate_Change-Meridional_Overturning_Circulation_and_Heatflux_Array
Rapid Climate Change-Meridional Overturning Circulation and Heatflux Array
North Atlantic Ocean research project
The Rapid Climate Change-Meridional Overturning Circulation and Heatflux Array (RAPID or MOCHA) program is a collaborative research project between the National Oceanography Centre (Southampton, U.K.), the University of Miami’s Rosenstiel School of Marine and Atmospheric Science (RSMAS), and NOAA’s Atlantic Oceanographic and Meteorological Laboratory (AOML) that measure the meridional overturning circulation (MOC) and ocean heat transport in the North Atlantic Ocean.[1] This array was deployed in March 2004 to continuously monitor the MOC and ocean heat transport that are primarily associated with the Thermohaline Circulation across the basin at 26°N. The RAPID-MOCHA array is planned to be continued through 2014 to provide a decade or longer continuous time series.[2]
The continuous observations are measured by an array of instruments along 26°N. This monitoring array directly measures the transport of the Gulf Stream in the Florida Strait using an undersea cable and a moored array measures bottom pressure and water column density (including temperature and salinity) at the western and eastern boundary and on either side of the Mid-Atlantic Ridge (MAR).[3] Absolute transports including barotropic circulation are monitored using precision bottom pressure gauges.[4] "Dynamic height" moorings are used to estimate the spatially average geostropic velocity profile and associated transports over relatively wide mooring separations.[2] The dynamic height moorings requires measurements on both sides of the current field only, rather both the horizontal and vertical structure of the current field to be sufficiently well resolved to estimate transports.[5] The basin-wide MOC strength and vertical structure are estimated via Ekman transports by satellite scatterometer measurements and the geostrophic and direct current observations.[2]
RAPID-MOCHA is funded by the National Environmental Research Council (NERC) and the National Science Foundation (NSF).[1]