DOI: 10.17604/5jd9-7f77
title: Guyana Abyssal Gyre Experiment (GAGE) current meter mooring ocean velocity records obtained between February 2000 and April 2002 at 16°N

description: The present dataset corresponds to the current meter ocean velocity records from the Guyana Abyssal Gyre Experiment (GAGE) projects. These velocity measurements were obtained between 2000-2002 and explored by several studies over the years: e.g., Mauritzen et al. (2002) (https://doi.org/10.1029/2001JC001114), Kanzow (2004) (https://macau.uni-kiel.de/receive/diss_mods_00001228), Kanzow et al. (2006) (https://doi.org/10.1016/j.dsr.2005.12.007). Through this data publication we make this historical dataset broadly available to the scientific community as part of recent efforts to understand the Antarctic Bottom Water (AABW) flow in the North Atlantic. The GAGE dataset consists of six current meter moorings along 16°N between the Guadeloupe archipelago and the western flank of the Mid-Atlantic Ridge that measured ocean velocity between February 2000 and April 2002 between 1400-5200 m. Together with the Meridional Overturning Variability Experiment (MOVE)'s (https://mooring.ucsd.edu/move/) current meter/hydrographic moorings in the same region, this dataset represents a unique observational platform to study the North Atlantic Deep Water and AABW velocity patterns in the Tropical North Atlantic. Here you can find processed-quality-controlled velocity product and the raw velocity measurements from the individual instruments.
description: We provide a series of NetCDF files containing the dataset. The file processed_gage_velocity.nc comprises the quality-controlled, 40h-low-pass filtered, and subsampled every two days Aanderaa current meter velocity records obtained as part of both GAGE and MOVE projects. The processed data velocity data were also interpolated to constant standard depth. In the "raw" directory, each file represents the original raw velocity records from each Aanderaa current meter deployed as part of GAGE and the necessary auxiliary data to perform the data processing and quality control. The resolution of the original measurements is every 30 minutes. Each raw file is named after the Id number of each instrument. All necessary metadata is included in the NetCDF data files.

Variables in processed_gage_velocity.nc file:

	- depth 	= depth of each velocity measurement (m)
	- latitude 	= latitude of each mooring (degrees east)
	- longitude	= longitude of each mooring (degrees north)
	- mooring 	= moorings' names
	- time 		= days since 1950-01-01 00:00:00 of each measurement
	- u 	    = east-west (zonal) ocean velocity component (cm/s)
	- v 		= north-south (meridional) ocean velocity component (cm/s)

Variables in raw/xxxsci.nc files:
	- events		= days since 1950-01-01 00:00:00 of each data event. Marks important events like beguining and end of the deployment.
	- pressure 		= sea water pressure of each measurement (dbar)
	- temperature 	= sea water in-situ temperature (degrees C)
	- time 			= days since 1950-01-01 00:00:00 of each measurement
	- u 	    	= east-west (zonal) ocean velocity component (cm/s)
	- v 			= north-south (meridional) ocean velocity component (cm/s)

Note: all files have a series of attributes containing the metadata