Características de mezcla de submesoescalas en las bahías del Estrecho de Gerlache (Antártida)

Translated title of the contribution: Submeso-scale mixing features in the Gerlache Strait Bays (Antarctica)

Jhon F. Mojica, David M. Holland, Julio Monroy

Research output: Contribution to journalArticlepeer-review


Measurements of turbulence in the ocean are sparse, especially in environments such as Antarctica. Here we map the spatial distribution of diapycnal diffusivities and the water column characteristics across the three main bays in the Gerlache Strait on the western side of the Antarctic Peninsula. The measurements were recorded during the Fifth Colombian Antarctic Expedition, 2018-2019, using a Vertical Microstructure Profiler in free fall for the first 400 m depth, to record fluctuations of vertical shear at dissipation scales (10-3 – 103 m). Diapycnal diffusivities are higher by 1-2 orders of magnitude in the Gerlache mainstream compared with the interior bays, with values from O (log10kρ = -3 m2s-1) to O (log10kρ = -5 m2s-1) respectively over the upper 400 m. The highest mixing values were recorded in the southern section of Gerlache Strait (Flandes Bay) compared to the northern one (Charlotte Bay), indicating better well-mixed water in the south. Observed Hot Spots of higher turbulence levels may be associated with the interaction of the entrance of the Upper Circumpolar Depth Water, the Antarctic Surface Water, and the Weddell Sea Deep Waters with resident waters and topography.

Translated title of the contributionSubmeso-scale mixing features in the Gerlache Strait Bays (Antarctica)
Original languageSpanish
Pages (from-to)41-58
Number of pages18
JournalBoletin de Investigaciones Marinas y Costeras
StatePublished - 2021


  • Antarctic Ocean dynamics
  • Diapycnal mixing
  • Gerlache Strait
  • Mixing
  • Sea ice

ASJC Scopus subject areas

  • Oceanography
  • Aquatic Science
  • Animal Science and Zoology
  • Water Science and Technology


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