3 . 8 Tropopause - Based Mesoscale Coherent Vortices : a Dynamical
نویسندگان
چکیده
منابع مشابه
Automated detection of coherent Lagrangian vortices in two-dimensional unsteady flows
Lagrangian coherent structures (LCSs) are exceptional material surfaces that act as cores of observed tracer patterns in fluid flows (see [1,2] for reviews). For oceanic flows, the tracers of interest include salinity, temperature, contaminants, nutrients and plankton—quantities that play an important role in the ecosystem and even in the climate. Fluxes of these quantities are typically domina...
متن کاملCoherent Structures in the Extratropical Atmosphere: A Dynamical Interpretation of Jet Streaks
The objective of this prospectus is to motivate and formulate a research plan to investigate the dynamics of jet streaks, building on recent idealised analytical and numerical work conducted on this topic using barotropic models (Cunningham 1997, hereafter C97). The hypothesis to be investigated is that jet streaks often are associated with the superposition of mesoscale coherent vortices of bo...
متن کاملPotential Vorticity Diagnosis of a Tropopause Polar Cyclone
Long-lived coherent vortices located near the tropopause are often found over polar regions. Although these vortices are a commonly observed feature of the Arctic, and can have lifetimes longer than one month, little is known about the mechanisms that control their evolution. This paper examines mechanisms of intensity change for a cyclonic tropopause polar vortex (TPV) using an Ertel potential...
متن کاملSubmesoscale currents in the ocean
This article is a perspective on the recently discovered realm of submesoscale currents in the ocean. They are intermediate-scale flow structures in the form of density fronts and filaments, topographic wakes and persistent coherent vortices at the surface and throughout the interior. They are created from mesoscale eddies and strong currents, and they provide a dynamical conduit for energy tra...
متن کاملDynamical Buildup of Lasing in Mesoscale Devices
The classical description of laser field buildup, based on time-averaged photon statistics of Class A lasers, rests on a statistical mixture of coherent and incoherent photons. Here, applying multiple analysis techniques to temporal streams of data acquired in the threshold region of a Class B mesoscale laser, we conclusively show that new physics is involved in the transition: the lasing build...
متن کامل