| Autor: |
Bogucki, D.J., Huguenard, K., Haus, B.K., Özgökmen, T.M., Reniers, A.J.H.M., Laxague, N.J.M. |
| Jazyk: |
angličtina |
| Rok vydání: |
2015 |
| Předmět: |
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| Zdroj: |
Geophysical Research Letters, 42 (3), 2015 |
| ISSN: |
0094-8276 |
| Popis: |
Our understanding of temperature dissipation rate ? within the upper ocean boundary layer, which is critical for climate forecasts, is very limited. Near-surface turbulence also affects dispersion of contaminants and biogeochemical tracers. Using high-resolution optical turbulence measurements, scaling laws for ? are investigated under forcing states where either the daytime heat flux or the wind stress forcing is dominant. We find that ? remains constant over 1.5 times the significant wave height, while over a layer below, ? decays based on the local surface forcing. When the heat flux is dominant, traditional scaling based on the Monin-Obukhov similarity theory remains valid; ? ? z?1. When the wind stress dominates, we observe the emergence of a new scaling, ? ? z?1/2, which is explained by invoking the effect of small-scale coherent structures on vertical heat transport. These results have implications for improved modeling of the ocean's heat and CO2 intake. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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