Abstract Ridging South Atlantic high pressure systems (ridging highs) are often accompanied by cut-off low (COL) aloft, but may also occur without them, in which case a linear baroclinic wave would be observed propagating across the African domain upper troposphere. Using 41 years of ERA-5 reanalysis data, this study documents differences between characteristics prevailing dynamical processes a...

Synoptic extra-tropical cyclone and anticyclone trajectories have been constructed from mean daily sea level pressure (SLP) data using a new automated scheme. Frequency, intensity and trajectory characteristics of these transients have been summarized to form indices describing wintertime cyclonic and anticyclonic activity over the North-Eastern Pacific (east of 170 W) during 1950–2001. During ...

The vortices emerging in rotating turbulent Rayleigh-Bénard convection in water at Rayleigh number Ra=6.0×10{8} are investigated using stereoscopic particle image velocimetry and by direct numerical simulation. The so-called Q criterion is used to detect the vortices from velocity fields. This criterion allows distinguishing vorticity- and strain-dominated regions in the flow by decomposing the...

Abstract. Statistics of anticyclonic eddy activity and trajectories in the Levantine Basin over 2000–2018 period are analyzed using DYNED-Atlas database, which links automated mesoscale detection by Angular Momentum Eddy Detection Tracking Algorithm (AMEDA) algorithm to situ oceanographic observations. This easternmost region Mediterranean Sea, delimited coast Cyprus, has a complex eddying acti...