Lower Tropospheric Response to Local Sea Surface Temperature Anomalies: A Numerical Study in the EUREC4 ${ ext{EUREC}}^{4}$A Region
Abstract Ocean and atmosphere exchange energy and mass at their interface at a rate that depends on the dynamical and thermodynamical disequilibrium between water and air. In this work, using an atmospheric model forced by observed high resolution sea surface temperature (SST) fields, we show that t...
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| Format: | Article |
| Language: | English |
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Wiley
2025-01-01
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| Series: | Geophysical Research Letters |
| Online Access: | https://doi.org/10.1029/2024GL112294 |
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| author | M. Borgnino F. Desbiolles A. N. Meroni C. Pasquero |
| author_facet | M. Borgnino F. Desbiolles A. N. Meroni C. Pasquero |
| author_sort | M. Borgnino |
| collection | DOAJ |
| description | Abstract Ocean and atmosphere exchange energy and mass at their interface at a rate that depends on the dynamical and thermodynamical disequilibrium between water and air. In this work, using an atmospheric model forced by observed high resolution sea surface temperature (SST) fields, we show that the air‐sea disequilibrium is also maintained by atmospheric processes driven by fine scale SST patterns. The analysis focuses on north‐western tropical Atlantic and indicates that fine scale SST anomalies modulate the air column stability and the entrainment of dry air at boundary layer top. The main effect is a modification in near surface temperature and moisture content, which produces a negative response of relative humidity to local SST variability, resulting in a larger sensitivity of latent than sensible heat fluxes to local SST anomalies. Such sensitivities are quantified as 95% and 70% of fluxes upper bound, estimated with local atmospheric properties uncorrelated with SST anomalies. |
| format | Article |
| id | doaj-art-48af0b36e53f43259e9a7475ad531e84 |
| institution | Kabale University |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-48af0b36e53f43259e9a7475ad531e842025-01-20T13:05:57ZengWileyGeophysical Research Letters0094-82761944-80072025-01-01521n/an/a10.1029/2024GL112294Lower Tropospheric Response to Local Sea Surface Temperature Anomalies: A Numerical Study in the EUREC4 ${ ext{EUREC}}^{4}$A RegionM. Borgnino0F. Desbiolles1A. N. Meroni2C. Pasquero3Department of Earth and Environmental Sciences University of Milano–Bicocca Milan ItalyDepartment of Earth and Environmental Sciences University of Milano–Bicocca Milan ItalyDepartment of Earth and Environmental Sciences University of Milano–Bicocca Milan ItalyDepartment of Earth and Environmental Sciences University of Milano–Bicocca Milan ItalyAbstract Ocean and atmosphere exchange energy and mass at their interface at a rate that depends on the dynamical and thermodynamical disequilibrium between water and air. In this work, using an atmospheric model forced by observed high resolution sea surface temperature (SST) fields, we show that the air‐sea disequilibrium is also maintained by atmospheric processes driven by fine scale SST patterns. The analysis focuses on north‐western tropical Atlantic and indicates that fine scale SST anomalies modulate the air column stability and the entrainment of dry air at boundary layer top. The main effect is a modification in near surface temperature and moisture content, which produces a negative response of relative humidity to local SST variability, resulting in a larger sensitivity of latent than sensible heat fluxes to local SST anomalies. Such sensitivities are quantified as 95% and 70% of fluxes upper bound, estimated with local atmospheric properties uncorrelated with SST anomalies.https://doi.org/10.1029/2024GL112294 |
| spellingShingle | M. Borgnino F. Desbiolles A. N. Meroni C. Pasquero Lower Tropospheric Response to Local Sea Surface Temperature Anomalies: A Numerical Study in the EUREC4 ${ ext{EUREC}}^{4}$A Region Geophysical Research Letters |
| title | Lower Tropospheric Response to Local Sea Surface Temperature Anomalies: A Numerical Study in the EUREC4 ${ ext{EUREC}}^{4}$A Region |
| title_full | Lower Tropospheric Response to Local Sea Surface Temperature Anomalies: A Numerical Study in the EUREC4 ${ ext{EUREC}}^{4}$A Region |
| title_fullStr | Lower Tropospheric Response to Local Sea Surface Temperature Anomalies: A Numerical Study in the EUREC4 ${ ext{EUREC}}^{4}$A Region |
| title_full_unstemmed | Lower Tropospheric Response to Local Sea Surface Temperature Anomalies: A Numerical Study in the EUREC4 ${ ext{EUREC}}^{4}$A Region |
| title_short | Lower Tropospheric Response to Local Sea Surface Temperature Anomalies: A Numerical Study in the EUREC4 ${ ext{EUREC}}^{4}$A Region |
| title_sort | lower tropospheric response to local sea surface temperature anomalies a numerical study in the eurec4 ext eurec 4 a region |
| url | https://doi.org/10.1029/2024GL112294 |
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