Variability of thermohaline regime of see water of the Gulf of Mexico in 2005-2017

  • Yu. El Hadri
  • N. A. Berlinsky
  • D. Yu. Volkov
  • M. О. Slizhe
Keywords: the Gulf of Mexico, temperature, salinity, stratification


The Gulf of Mexico is a large, productive, marine and coastal ecosystem providing the coastal residents and neighbouring regions with goods and services. The Gulf of Mexico's water area plays a significant role in shaping the climate across the coastal zone and the thermal state of the region's water also has a major impact on development of atmospheric processes over the Atlantic and Europe. Long-term climate variability throughout the Gulf of Mexico may affect both the strength of the Gulf Stream and heat transfer patterns within the ocean and the economic activity and environmental stability of the entire Northwest Atlantic Region. This work aims at determining the characteristics of variability of temperature regime and salinity of the Gulf of Mexico over recent decades.

The study was conducted based on the Gulf of Mexico Regional Climatology (GOM RC) data, version 2, available at the website of the NOAA's National Centers for Environmental Information (NCEI). It analyzes the temperature and salinity values at different depths for the period of 2005-2017. According to the analysis, over 2005-2017 the spatial distribution of the average annual water temperature on the Gulf of Mexico's surface demonstrates its decrease from south to north. Its highest value is observed next to the northwestern coast of Cuba and along the coastal area of the Bay of Campeche, and the lowest temperature is observed at Apalachee Bay located in the northeastern part of the Gulf of Mexico. Though significant horizontal temperature gradients are observed in winter, during the warm period the temperature field is more homogeneous. The minimum average monthly water temperature on the surface is observed in January, the maximum one – in September. The most distinct seasonal changes in temperature are observed in the water of the northern part of the Gulf of Mexico next to the United States' coast. The distribution of average annual salinity of the most of the Gulf of Mexico is homogeneous with the exception of its northern part, especially in the area where the Mississippi River water flows into it, where salinity decreases sharply. Graphs of water temperature and salinity distribution at different depths across different areas of the gulf were constructed in order to determine the water stratification.


Sukhovey, V.F., Korotaev, G.K. & Shapiro, N.B. (1980). Gidrologiya Karibskogo morya i Meksikanskogo zaliva [Hydrology of the Caribbean and the Gulf of Mexico]. Leningrad: Gidrometeoizdat. (in Russ)

Sturges, W. & Leben, R.R. (2000). Frequency of ring separations for the loop current in the Gulf of Mexico. Journal of Physical Oceanography, 30, pр. 1814 -1819

Mooers, C.N.K. & Maul, G.A. (1998). Intra-Americas sea circulation. In: A.R. Robinson (ed.). The sea: The global coastal ocean. Regional studies and syntheses. New York: John Wiley and Sons

Sturges, W. & Lugo-Fernandez, A. (2005). Circulation in the Gulf of Mexico: over most of the Gulf observations and models. Washington: AGU

Zavala-Hidalgo, J., Gallegos-García, A., Martínez-López, B. et al. (2006). Seasonal upwelling on the Western and Southern Shelves of the Gulf of Mexico. Ocean Dynamics, 56, рр. 333-338.

Kumpf, H., Steidinger, K. & Sherman K. (1999). The Gulf of Mexico large marine ecosystem: Assessment, sustainability, and management. Malden: Blackwell Science.

Yoskowitz, D., Leon, C., Gibeaut, J., Lupher, B. et al. (2013). Gulf 360: State of the Gulf of Mexico. Harte Research Institute for Gulf of Mexico Studies. Texas: A&M University-Corpus Christi.

Weather Atlas. Available at: (accessed 11 November 2021)

Royer, T.V. (2020). Stoichiometry of nitrogen, phosphorus, and silica loads in the Mississippi-Atchafalaya River basin reveals spatial and temporal patterns in risk for cyanobacterial blooms. Limnology and Oceanography, 65(2), pр. 325-335.

Ward, C.H. & Tunnell, J.W. (2017). Habitats and biota of the Gulf of Mexico: An overview. In: Ward, C. (ed.). Habitats and biota of the Gulf of Mexico: Before the deepwater horizon oil spill. New York: Springer.

Ward, M., Harris, P.M. & Ward, A.K. (2005). Gulf coast rivers of the Southeastern United States. In: Benke, A.C., Cushing, C.E. (eds). Rivers of North America. Academic Press.

del Monte-Luna, P., Villalobos, H. & Arreguin-Sanchez, F. (2015). Variability of sea surface temperature in the southwestern Gulf of Mexico. Continental Shelf Research, 102, pр. 73-79.

Poore, R.Z., DeLong, K.L., Richey, J.N. & Quinn, T.M. (2009). Evidence of multidecadal climate variability and the Atlantic multidecadal oscillation from a Gulf of Mexico sea-surface temperature-proxy record. Geo-Mar. Lett., 29, pр. 477-484.

Zavala-Hidalgo, J., Pares-Sierra, A. & Ochoa, J. (2002). Seasonal variability of the temperature and heat fluxes in the Gulf of Mexico. Atmosfera, 15, pр. 81-104.

Turner, R.E., Rabalais, N.N. & Justic, D. (2017). Trends in summer bottom-water temperatures on the northern Gulf of Mexico continental shelf from 1985 to 2015. PLoS One, 12(9), e0184350. journal.pone.0184350

Hiddink, J.G., Burrows, M.T. & Molinos, J.G. (2015). Temperature tracking by North Sea benthic invertebrates in response to climate change. Global Change Biology, 21, pр. 117-129. DOI:10.1111/gcb.12726

Sheppard, C. (ed.). (2019). The Gulf of Mexico. In: World Seas: an Environmental Evaluation. Volume I: Europe, The Americas and West Africa. London: Academic Press.

Ye, Met al. (2019). Charge-Free Mixing Entropy Battery Enabled by Low-Cost Electrode Materials. ACS Omega, 4(7), рp. 11785-11790. acsomega.9b00863

The Gulf of Mexico Regional Climatology version 2. Available at: (accessed 9 March 2021)

Seidov, D., Mishonov, A.V., Boyer, T.P. et al. (2020). Gulf of Mexico regional climatology version 2 (NCEI Accession 0222571). NOAA National Centers for Environmental Information. Dataset. Available at: (accessed 7 May 2021)

Boyer, T.P., Baranova, O.K., Coleman, C. et al. (2018). World Ocean Database 2018. NOAA Atlas NESDIS 87. Available at: default/files/2020-04/wod_intro.pdf (accessed 7 May 2021)

Dong, S. (2020). Intra-Americas Sea Ocean Nowcast / Forecast System. Evaluation against CTD. Available at: (accessed 27 July 2021)

How to Cite
El Hadri, Y., Berlinsky, N. A., Volkov, D. Y., & SlizheM. О. (2021). Variability of thermohaline regime of see water of the Gulf of Mexico in 2005-2017. Ukrainian Hydrometeorological Journal, (28), 65-76.