Although the region is very shallow, this phenomenon separated the water column into two layers with differentiable thermohaline characteristics.Monthly-averaged SST anomalies showed stronger upwelling advected waters off Campeche during summer (from July to August each year).
Introduction
Located on the southeast Gulf of Mexico (GoM), the Yucatan Peninsula continental shelf (hereafter Yucatan Shelf), is an important economic area rich in fishing resources, gas, and oil deposits. It is a wide shallow marine region where the ocean floor frictions the ocean currents and detriments the height of the waves, characterized by low speeds (mean -20 cm/s, \citealp*{Mart_inez_Lopez_1998}, \citealp{r2016}) and low significant wave heights (0.63 m on average), respectively. Wind stress forcing and bottom friction are the main drivers of the ocean currents over the shelf, but also the water column stratification has been found to be an important factor (\citealp{r2016}, \citealp{jl2016}, \citealt{Jouanno_2018}). Winds blow preferentially towards the west all year-round (also known as easterlies or trade winds), forcing the ocean to produce a westward circulation (\citealp*{Mart_inez_Lopez_1998} and \citealp{Zavala_Hidalgo_2003}). But from September to June atmospheric cold fronts coming from continental North America motivate wind burst episodes affecting the region with northwesterly winds blowing over the hole GoM (events locally known as "Nortes")\citep{g2020}.