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Resumen del producto
Romero, E., L., Tenorio-Fernández, E., Portela, J., Montes-Aréchiga & L., Sánchez-Velasco
(2023).
Improving the thermocline calculation over the global ocean.
Ocean Science (Eds.),
Ocean Science.
19(3): 887-901.
DOI: 10.5194/os-19-887-2023.
Improving the thermocline calculation over the global ocean
Emmanuel Romero 1, Leonardo Tenorio-Fernández 1, Esther Portela 2, Jorge Montes-Aréchiga 3 y Laura Sánchez-Velasco 4
1 Departamento de Oceanología, Instituto Politécnico Nacional–Centro Interdisciplinario de Ciencias Marinas (IPN–CICIMAR), Av. IPN s/n, La Paz, B.C.S., 23096, Mexico
2 CONAHCyT, Consejo Nacional de Humanidades Ciencia y Tecnología, Av. Insurgentes Sur 1582, Col. Crédito Constructor, Alcaldía Benito Juárez, C.P. 03940, Mexico City, Mexico
3 School of Environmental Sciences, University of East Anglia, Norwich, UK
4 Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Univ. Brest, Laboratoire d'Océanographie Physique et Spatiale, CNRS, IRD, Ifremer, Plouzané, France
According to the typical thermal structure of theocean, the water column can be divided into three layers:the mixed layer, the thermocline and the deep layer. In thisstudy, we provide a new methodology, based on a functionadjustment to the temperature profile, to locate the minimumand maximum depths of the strongest thermocline. We firstvalidated our methodology by comparing the mixed layerdepth obtained with the method proposed here with threeother methods from previous studies. Since we found a verygood agreement between the four methods we used the functionadjustment to compute the monthly climatologies of themaximum thermocline depth and the thermocline thicknessand strength in the global ocean. We also provide an assessmentof the regions of the ocean where our adjustment isvalid, i.e., where the thermal structure of the ocean followsthe three-layer structure. However, there are ocean regionswhere the water column cannot be separated into three layersdue to the dynamic processes that alter it. This assessmenthighlights the limitations of the existing methods toaccurately determine the mixed layer depth and the thermoclinedepth in oceanic regions that are particularly turbulentsuch as the Southern Ocean and the northern North Atlantic,among others. The method proposed here has shown to berobust and easy to apply.
Palabras clave: Termocline
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