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Your search keyword '"D'Agostino N."' showing total 20 results
Start Over Author "D'Agostino N." Publisher american geophysical union (agu)
20 results on '"D'Agostino N."'

3. Links Between Sea Surface Temperature Structures, Clouds and Rainfall: Study Case of the Mediterranean Sea

Author

Agostino N. Meroni, Fabien Desbiolles, Mostafa E. Hamouda, Claudia Pasquero, Maria Alberta Alberti, Desbiolles, F, Alberti, M, Hamouda, M, Meroni, A, and Pasquero, C

Subjects
Sea surface temperature, thermal feedback, Geophysics, Mediterranean sea, SST gradient, Climatology, rainfall, GEO/12 - OCEANOGRAFIA E FISICA DELL'ATMOSFERA, cloud, General Earth and Planetary Sciences, Environmental science, Thermal feedback, wind divergence in the MABL
Abstract

Using 25years of ERA5 reanalysis data, this study shows that wind divergence is partially driven by small-scale sea surface temperature (SST) patterns via their effect on the boundary layer stability. Moreover, strong warm-to-cold fronts (the upper quartile) are associated with a mean increase of cloud cover of 10%±5% and a mean increase in the probability of a rain event of 15%±6%, with respect to the average values. The cloud and rainfall dependence on SST fronts is more pronounced in Fall, probably due to the stronger SST gradients present at the end of the summer season.

Published
2021
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4. Role of SST Patterns on Surface Wind Modulation of a Heavy Midlatitude Precipitation Event

Author

Antonio Parodi, Claudia Pasquero, Agostino N. Meroni, Meroni, A, Parodi, A, and Pasquero, C

Subjects
heavy precipitation, 021110 strategic, defence & security studies, Atmospheric Science, 010504 meteorology & atmospheric sciences, FIS/06 - FISICA PER IL SISTEMA TERRA E PER IL MEZZO CIRCUMTERRESTRE, Event (relativity), GEO/12 - OCEANOGRAFIA E FISICA DELL'ATMOSFERA, 0211 other engineering and technologies, mesoscale convective system, 02 engineering and technology, 01 natural sciences, Geophysics, Space and Planetary Science, Modulation, numerical simulation, Climatology, Middle latitudes, air-sea interaction, Earth and Planetary Sciences (miscellaneous), marine atmospheric boundary layer, Environmental science, Precipitation, 0105 earth and related environmental sciences
Abstract

The mechanisms controlling the influence of the sea surface temperature (SST) structure on the surface winds are studied by means of numerical simulations run with a nonhydrostatic fully compressible state-of-the-art numerical model in a realistic midlatitudes setup, leading to the 9 October 2014 Genoa heavy rainfall event. Starting from a simulation with high-resolution submesoscale eddy-permitting SST field, the surface temperature boundary conditions are changed to enhance, reduce, or smooth the SST gradient. It is found that the marine atmospheric boundary layer responds to the submesoscale SST forcing structures over time scales of the order of hours. In particular, through the downward momentum mixing mechanism, the presence of SST horizontal gradients impacts the spatial structure of the surface wind convergence, which can displace the convective heavy rain bands that develop over the sea.

Published
2018
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