Publication Date:
2023-07-06
Description:
Important effects of mesoscale eddies in eastern boundary upwelling systems (EBUS) are offshore transport of coastal water and vertical exchange between the mixed layer and below. In our contribution we reconstruct the 3-D structure of several cyclonic eddies and anticyclonic modewater eddies in the Canary EBUS from in situ velocity observations, based on different survey patterns of different durations. The reconstructions include derived dynamic properties such as vorticity and divergence, so that trapping radii and shallow secondary circulation can be estimated. Common features of the eddies are used to extrapolate on the offshore transport and vertical exchange caused by EBUS eddies. Some collateral insights from these investigations include that (i) a few inertial periods of observation time are needed to estimate vertical velocity, and (ii) all observed eddies have a radius very similar to the Rossby radius, as opposed to the larger variability in size that satellite products suggest.
Language:
English
Type:
info:eu-repo/semantics/conferenceObject
