main thermocline

main thermocline

[′mān ′thər·mə‚klīn]
(oceanography)
A thermocline that is deep enough in the ocean to be unaffected by seasonal temperature changes in the atmosphere. Also known as permanent thermocline.
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References in periodicals archive ?
Most of the warmer and more saline waters of the world are concentrated in the upper kilometer of the subtropical and tropical circulation regimes in what is called the main thermocline (a region of rapid decrease in temperature with depth, in the North Atlantic typically the upper kilometer).
The abyssal circulation transports cold, fresh water formed at high latitudes toward the mid and low latitudes, where it upwells to maintain the main thermocline (a region of rapid decrease in temperature with depth) in the presence of downward heat diffusion.