thermocline

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thermocline

[′thər·mə‚klīn]
(geophysics)
A temperature gradient as in a layer of sea water, in which the temperature decrease with depth is greater than that of the overlying and underlying water. Also known as metalimnion.
A layer in a thermally stratified body of water in which such a gradient occurs.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The thermocline in 1989 was observed at 5 m, 4 m in 1996, and 8 m during 2001.
Eliminate all areas on your map deeper than the thermocline and you've vastly narrowed the search.
Sprawling bodies of water like Lake of the Woods have areas that range from oligotrophic to eutrophic, young to old, poor or rich in nutrients respectively; so, big pike can be found in shallow cabbage beds, skimming the thermocline over deep water, patrolling deep sunken islands or cruising deep flats, all during the same afternoon, anywhere from June through October.
"Let the pack go deep over thermoclines. Slow down and scan the inside turns, the humps, and the ledges on the breaks closest to shore in depths of 50 to 150 feet, looking for any bowl or cup that fills up with river-scented water.
Whatever it is, once the water drops 10 F, the thermocline begins to dissolve and that pattern vanishes."
Thermoclines offshore and temperature breaks can hold bait and predators looking to chew.
Most years kings will find thermoclines where bait schools hang.
The cold water, sometimes dropping into the 50s below thermoclines over deep-water reefs, will force bottom feeders and even bluewater pelagics, like those sailfish, to move inshore in their efforts to find baitfish and an escape from the cold.
Rick Ryals had great success last year catching big black seabass as cold-water thermoclines were still present.
Dave Zalewski out of Madeira Beach noted that thermoclines in deep Gulf waters kept many grouper in shallow, 50 to 60 feet, where water temps were more to their liking.
But this year, the summer fishery was different than most due to cool water holding fish around thermoclines in the Gulf in 50 to 65 feet of water.
Down Scan Imaging (DSI) sonar technology highlights the Lowrance Elite-5 DSI fish finder/chart plotter, I allowing anglers to view hard and soft bottom structure, individual bait schools, and even thermoclines on a 256-color, 5-inch screen.