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A case study of impacts of an extreme weather system on the Mediterranean Sea circulation features: Medicane Apollo (2021)
Menna, M.; Martellucci, R.; Reale, M.; Cossarini, G.; Salon, S.; Notarstefano, G.; Mauri, E.; Poulain, P.M.; Gallo, A.; Solidoro, C. (2023). A case study of impacts of an extreme weather system on the Mediterranean Sea circulation features: Medicane Apollo (2021). NPG Scientific Reports 13(1): 3870. https://dx.doi.org/10.1038/s41598-023-29942-w
In: Scientific Reports (Nature Publishing Group). Nature Publishing Group: London. ISSN 2045-2322; e-ISSN 2045-2322
|   |
| Auteurs | | Top |
- Menna, M.
- Martellucci, R.
- Reale, M.
- Cossarini, G.
|
- Salon, S.
- Notarstefano, G.
- Mauri, E.
|
- Poulain, P.M.
- Gallo, A.
- Solidoro, C.
|
| Abstract |
The attention of the scientific community, policymakers, and public opinion on the Medicanes has recently grown because of their increase in intensity and harmful potential. Although Medicanes may be influenced by pre-existing upper-ocean conditions, uncertainties remain about how such weather extremes influence ocean circulation. This work examines a condition that has been never described before in the Mediterranean, which involves the interplay between an atmospheric cyclone (Medicane Apollo—October 2021) and a cyclonic gyre located in the western Ionian Sea. During the event, the temperature in the core of the cold gyre dropped dramatically, due to a local maximum in the wind-stress curl, Ekman pumping, and relative vorticity. Cooling and vertical mixing of the surface layer combined with upwelling in the subsurface layer caused a shoaling of the Mixed Layer Depth, halocline, and nutricline. The resulting biogeochemical impacts included an increase in oxygen solubility, chlorophyll concentration, productivity at the surface, and decreases in the subsurface layer. The presence of a cold gyre along Apollo's trajectory leads to a different ocean response from that observed with previous Medicanes, endorsing the efficiency of a multi-platform observation system integrated into an operational model for future mitigation of weather-related damages. |
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