Abstract

Occasionally, cyclones with tropical-like characteristics, sometimes called as Medicanes, are observed in theMediterranean. Due to the intense wind forcing and the consequent development of high wind waves, a largenumber of sea spray droplets are likely to be produced at the sea surface. On the other side, it is known thatMedicane intensity is sensitive to fluxes of momentum and enthalpy between the ocean and atmosphere in thehigh wind core of the storm. It has been recognized that much of this exchange between ocean and atmosphere islikely mediated by sea spray. In particular, the enhancement of sea-air enthalpy flux under severe wind speed issupplied by sea spray that produces the large amount of heat necessary to generate and maintain the hurricane core.Laboratory studies, numerical spray droplets models and observations have proved that sea spray can redistributeenthalpy between the temperature and humidity fields in the marine boundary layer. In particular, the role ofre-entrant spray particles, the portion of spray that fall back into the sea, have the important effect of cooling theocean thus representing a net enthalpy flux to the atmosphere.This work represents an integrated numerical study utilising the third-generation wave model (SWAN) two-waycoupled with the Weather Research and Forecasting Model, running in both stand-alone configuration (WRF) andintegrated with the chemistry package (WRF-Chem). The latter is configured using GOCART aerosol module,which explicitly consider the emission and transport of sea spray aerosol. An additional sea spray source functionfor severe wind conditions has been implemented in the WRF-Chem model under the GOCART aerosol module.The operative sequence is performed considering the offline coupling sequence: first SWAN with WRF, andthen SWAN with WRF-Chem. With this sequence, there is a full consistency between the wind field and wavegeometry.A test is performed considering the Medicane occurred in South-Eastern Italy on September 26, 2006. ThisMedicane is one of the most deeply analyzed in literature, so that an intensive investigation of the feedbacksbetween sea-spray, drag coefficients and latent heat flux may be made considering our integrated approach incomparison with its known features.

Autore Pugliese

• Rizza Umberto

Tutti gli autori

• Rizza U.; Canepa E.; Passerini G.; Morichetti M.; Carniel S.; Miglietta M.M.; Ricchi A.

Titolo volume/Rivista

Non Disponibile

Anno di pubblicazione

2017

ISSN

Non Disponibile

ISBN

Non Disponibile

Numero di citazioni Wos

Nessuna citazione

Ultimo Aggiornamento Citazioni

Non Disponibile

Numero di citazioni Scopus

Non Disponibile

Ultimo Aggiornamento Citazioni

Non Disponibile

Settori ERC

Non Disponibile

Codici ASJC

Non Disponibile