Abstract
The CTD data are used to analyze comparatively the properties of temperature and salinity inversions in intrusive layers observed in the northwestern tropical Atlantic and Eurasian Basin of the Arctic (within the depth range of 200–600 m). In both cases the inversions are suggested to be formed by the advective circulations arisen within the quasi-uniform density layers inclined relative to the isopycnic surfaces in a stably stratified medium. An application of the 2D model which had been used before to describe the circulation in the tropical Atlantic layers demonstrated very low estimates of flow velocities and apparent vertical diffusivities in the Arctic layers. This is explained by considerable differences in the Coriolis parameter and in the mean horizontal gradients of temperature and salinity in the frontal zones of two regions of interest. However, if the intrusion Arctic layer circulations are supposed to be three-dimensional (i.e., if there are substantial along-front slopes of layers), the model estimates of circulation velocities and apparent diffusivities based upon 3D approach can be much higher.
Similar content being viewed by others
References
V. M. Zhurbas, N. P. Kuz’mina, and O. E. Kul’sha, “Thermohaline Inversions in Quasihomogeneous Layers of the Stepped Fine Structure of the Ocean,” Izv. Akad. Nauk, Fiz. Atmos. Okeana, No. 11, 26 (1990) [Izv., Atmos. Oceanic Phys., No. 11, 26 (1990)].
V. M. Zhurbas and R. V. Ozmidov, “On the Formation of Stepped Fine Structure of the Ocean by Thermohaline Intrusions,” Izv. Akad. Nauk, Fiz. Atmos. Okeana, No. 12, 19 (1983) [Izv., Atmos. Oceanic Phys., No. 12, 19 (1983)].
V. M. Zhurbas, R. V. Ozmidov, Ya. Ya. Laanemets, et al., “Forms of Fine Thermohaline Structure of the Ocean. Catalog,” in Materials of Oceanological Researches, Issue 1 (Mezhvedomstvennyi Geofizicheskii Comitet pri Prezidiume AN SSSR, Moscow, 1987) [in Russian].
W. J. Merryfield, “Origin of Thermohaline Staircases,” J. Phys. Oceanogr., 30 (2000).
L. Padman and T. M. Dillon, “On the Horizontal Extent of the Canadian Basin Thermohaline Steps,” J. Phys. Oceanogr., No. 10, 8 (1988).
B. Rudels, G. Bjork, R. D. Muench, and U. Schauer, “Double-Diffusive Layering in the Eurasian Basin of the Arctic Ocean,” J. Mar. Sys., 21 (1999).
U. Schauer, R. D. Muench, B. Rudels, and L. Timokhov, “The Impact of Eastern Arctic Shelf Water on the Nansen Basin Intermediate Layers,” J. Geophys. Res., No. C2, 102 (1997).
R. V. Schmitt, “Form of the Temperature-Salinity Relationship in the Central Water: Evidence for Double-Diffusive Mixing,” J. Phys. Oceanogr., No. 7, 11 (1981).
D. Walsh and E. Carmack, “The Nested Structure of Arctic Thermohaline Intrusions,” Ocean Modeling, 5 (2003).
Author information
Authors and Affiliations
Additional information
Original Russian Text © N.P. Kuz’mina, N.V. Zhurbas, 2012, published in Meteorologiya i Gidrologiya, 2012, No. 7, pp. 44–53.
About this article
Cite this article
Kuz’mina, N.P., Zhurbas, N.V. Comparative analysis of vertical thermohaline structure of the northwestern tropical Atlantic and Eurasian basin of the Arctic ocean. Russ. Meteorol. Hydrol. 37, 461–467 (2012). https://doi.org/10.3103/S1068373912070059
Received:
Published:
Issue Date:
DOI: https://doi.org/10.3103/S1068373912070059