Articles | Volume 20, issue 5
https://doi.org/10.5194/os-20-1209-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/os-20-1209-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
07 Oct 2024
Research article |
| 07 Oct 2024
| 07 Oct 2024
Study of the role of abyssal ocean stratification in the rearrangement of potential vorticity through the water column
Beatrice Giambenedetti
CORRESPONDING AUTHOR
Istituto Nazionale di Geofisica e Vulcanologia (INGV), Via di Vigna Murata 605, 00143 Rome, Italy
Nadia Lo Bue
Istituto Nazionale di Geofisica e Vulcanologia (INGV), Via di Vigna Murata 605, 00143 Rome, Italy
Vincenzo Artale
Istituto Nazionale di Geofisica e Vulcanologia (INGV), Via di Vigna Murata 605, 00143 Rome, Italy
National Research Council (CNR), Institute of Marine Sciences (ISMAR), Via del Fosso del Cavaliere 100, 00133 Rome, Italy
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The deep Ionian Sea strongly influences how the Mediterranean water masses circulate. By studying how internal waves interact with the seafloor, we found that rougher terrain changes how wave energy is spread out. Energy shifts from large to small scales, affecting deep water mixing. These findings help improve models of Mediterranean circulation by showing how seafloor shape impacts mixing in the deep sea.
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The deep Ionian Sea strongly influences how the Mediterranean water masses circulate. By studying how internal waves interact with the seafloor, we found that rougher terrain changes how wave energy is spread out. Energy shifts from large to small scales, affecting deep water mixing. These findings help improve models of Mediterranean circulation by showing how seafloor shape impacts mixing in the deep sea.
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Relative sea level in Venice rose by about 2.5 mm/year in the past 150 years due to the combined effect of subsidence and mean sea-level rise. We estimate the likely range of mean sea-level rise in Venice by 2100 due to climate changes to be between about 10 and 110 cm, with an improbable yet possible high-end scenario of about 170 cm. Projections of subsidence are not available, but historical evidence demonstrates that they can increase the hazard posed by climatically induced sea-level rise.
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Short summary
We used a simplified model to investigate how changes in abyssal stratification can impact the propagation of vortices in the ocean. Although abyssal stratification is typically considered stable, observations have shown that this is not always a good approximation. We found that changes in deep stratification can introduce variability into the patterns of the vortices. Despite the assumptions made in our model, our results are supported by seafloor observations in the Ionian Sea.
We used a simplified model to investigate how changes in abyssal stratification can impact the...
