here are areas flooded by the sea

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Venice
Falling water along with rising sea levels due to melting ice will threaten many Mediterranean coastal areas.
Lorenzo Pasqualini Lorenzo Pasqualini 4 minutes

Projection from sea ​​level risepublished in 2021 by the Intergovernmental Panel on Climate Change (IPCC) in the AR6 report, would underestimated along the Mediterranean coast. This is the result of research”Projections of sea level rise up to 2150 on the northern coast of the Mediterranean Sea”, just published in the international journal Environmental Research Letters by a team of researchers from the National Institute of Geophysics and Volcanology (INGV) and the Radboud Radio Lab of the Department of Astrophysics of Radboud University (Netherlands).

The impact of decline

“PUSH decreasethat is, the slow downward movement of land due to natural or anthropogenic causes, has a fundamental role in accelerating sea level rise along the coast, which is triggered by global warming since 1880,” explains Marco Anzidei, researcher at INGV et al. – author of the study.

“Our analyzes actually show that.” Due to the decrease in sea levels in some areas of the Mediterranean Sea, they are rising almost three times faster compared to stable areas,” adds Antonio Vecchio, researcher at Radboud Universiteit Nijmegen and first author of the study.

“The Mediterranean is in fact characterized by a strong variability of vertical coastal movements that differ from area to area as a result of tectonic, volcanic and anthropic activity,” continues Enrico Serpelloni, INGV researcher and co-author of the study. . “For our research, carried out as part of the SAVEMEDCOASTS, SAVEMEDCOASTS2 and Pianeta Dinamico projects, we used data from numerous GNSS geodetic satellite stations located within 5 km of the sea, with which we can calculate the vertical displacement rates of the land with millimeter precision”.

In light of this evidence, a team of researchers has recalculated IPCC projections up to 2150 in 265 Mediterranean areasalso consistent with the 51 tide gauges of the International Monitoring Networks, including subsidence data in the analyses.

“The results show maximum and minimum differences compared to the IPCC report ranging from +109 cm to -77 cm approximatelywith an average value higher than about 8 cm,” explains Antonio Vecchio.

the coast of the rising sea
Highlighted in red are the 163 major coastal plains most exposed to sea level rise between 2100 and 2150. The total area that could be submerged is roughly equivalent to the surface of Switzerland or even 38,529 km2. (source: INGV)

Endangered coastal areas

“It means the rise and fall of the sea level approximately 38,500 km2 of Mediterranean coast – of which approximately 19,000 km2 in the northern sector only pelvis – soon they will be more revealed to the risk of flooding in the sea with subsequent greater impacts on the environment, human activities and infrastructure. It is therefore necessary to take concrete measures to support the coastal population, which will be increasingly vulnerable to rising sea levels and the greater risks associated with it by the end of this century and beyond,” concludes Marco Anzidei.



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