Κατεύθυνση Φυσική Περιβάλλοντος
Library of the School of Science

2021-04-19

2021

Antoulinaki Savvoula

Φλόκα Έλενα, Καθηγήτρια, Τμήμα Φυσικής, ΕΚΠΑ
Σοφιανός Σαράντης, Αναπληρωτής Καθηγητής, Τμήμα Φυσικής, ΕΚΠΑ
Τζέλλα- Τόμπρου Μαρία, Καθηγήτρια, Τμήμα Φυσικής, ΕΚΠΑ

Επίδραση των ροών της θάλασσας στην εκρηκτική κυκλογένεση στη Μεσόγειο

Greek

The role of sea surface fluxes in Mediterranean explosive cyclogenesis

Explosive cyclogenesis in Mediterranean is related with the interaction between baroclinic and diabatic mechanisms. The most important diabatic mechanism is claimed to be sea surface heat fluxes, latent and sensible heat flux. The objective of this study is a) to investigate the role of surface fluxes in the occurrence of explosive cyclogenesis in Mediterranean on a climatic basis as well as the temporal response of this role, b) to examine the behavior of other sea-related factors during explosive cyclogenesis, such as sea surface temperature (SST), air temperature, salinity and sea surface height. Specifically, for the period 2002-2015, after the detection of cases of explosive cyclones, with the MS algorithm of the University of Melbourne, a total of 50 cases were found in the Eastern, Central and Western Mediterranean. The variation of the parameters reported two days before to two days after the time of explosive cyclogenesis was examined. Furthermore, the anomalies of latent and sensible heat and SST were also calculated, as derived from all cases, in relation to the corresponding daily climatological values at its location. Finally, three case studies, one for each subregions of Mediterranean, were further analyzed. It was found that heat fluxes from the surface to the atmosphere play an important role for the examined phenomenon, since loss of both latent and sensible heat is significantly increased just before explosive cyclogenesis and continues increasing afterwards. The magnitude of the anomalies is especially high for latent heat loss. The anomalies of both parameters peak 12 hours after the explosive deepening rate of pressure.

Science

explosive cyclogenesis, Mediterranean, latent heat flux, sensible heat flux, sea surface temperature, climatology

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https://pergamos.lib.uoa.gr/uoa/dl/object/2943378