1,721,025 research outputs found
Lagrangian diagnostics of transport properties, barrier effects and mixing rates for the stratospheric polar vortex through a dynamical systems approach (FSLE)
No full textValidation of Seasonal Forecasts over the Mediterranean Basin Using Ground Based and Satellite Data
No full textA physical mechanism of the atmospheric response over Antarctica to decadal trends in tropical SST
No full textThe atmospheric response to the tendency of oceanic
equatorial temperature observed during recent decades has been simulated, leading to the identification of a possible link between tropical Sea Surface Temperature (SST) and Antarctic climate change. The dynamical mechanism, by which changes in tropical SSTs exert an influence on the upper latitude atmospheric dynamics, is investigated. The analysis of the simulations suggests that the perturbations of the atmospheric circulation are induced by changes in the annual cycle of the tropical convective activity, which influences the intensity of
the wave forcing. In particular, the introduction of the SST perturbation generates a strong vertical wind shear at middle latitude during the Antarctic winter affecting the propagation
of convectively generated waves during the following spring
Changes in extreme climate events over the Mediterranean region in response to projected Arctic sea-ice reduction
No full textThe Use of Conservative Coordinates for Reconstruction Techniques and for the Development of a Two-Dimensional Transport Model
No full textSimulation of Polar Antarctic trends: influence of tropical SST
No full textThe polar Antarctic atmosphere has been recently characterized by a progressive intensification of the circumpolar westerly winds, both in the stratospheric and tropospheric component. We simulate the response of the polar southern hemisphere atmosphere to a prescribed trend of oceanic equatorial temperature to demonstrate a possible link between the progressive warming of tropical sea surface temperature (SST) and Antarctic climate changes in the last decades. Model simulations produce an atmospheric response suggesting an influence of equatorial SST on polar dynamics, particularly during summer months
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