Transverse structure of turbulence in a rotating gravity current
Article first published online: 17 APR 2007
Copyright 2007 by the American Geophysical Union.
Geophysical Research Letters
Volume 34, Issue 8, April 2007
How to Cite
2007), Transverse structure of turbulence in a rotating gravity current, Geophys. Res. Lett., 34, L08601, doi:10.1029/2007GL029521., , , , , , and (
- Issue published online: 17 APR 2007
- Article first published online: 17 APR 2007
- Manuscript Accepted: 20 MAR 2007
- Manuscript Revised: 16 MAR 2007
- Manuscript Received: 31 JAN 2007
- gravity currents;
 Synoptic, high-resolution, measurements of turbulent kinetic energy dissipation, current velocity and water column stratification across a fast (up to 0.7 m s−1) oceanic saline gravity current are presented. Our data provide, for the first time, a detailed two-dimensional picture of the turbulence structure inside a gravity current. Strong boundary-layer and interfacial turbulence can be distinguished from a quiet core, and a strong asymmetry of mixing near the outer edges of the gravity current is apparent. This asymmetry is mirrored by the computed entrainment velocities, varying approximately by a factor of 5 across the gravity current. It is argued that the asymmetry is due to rotational effects that can be clearly identified also in the velocity and density fields.