patrick_g
Elite Member
Bird said:I've dived down and hit those drastic temperature changes. Probably not nearly as drastic as you're talking about, but certainly noticeable.
There is a major gyre that circulates water in a large clockwise loop in the north of the equator in the Pacific ocean. It goes from the tropics up to the Aleutians and then down the coast of Alaska, Washington, Oregon, California, Baja, and part of the west coast of Mexico before turning right on the north side of the equator and going around again. As it runs down the west coast of North America it tends to turn (right) clockwise due to Coriolis effect and these surface currents pull the warmed surface water away from the coast. The warmed surface waters are replaced by upwelling. Deep ocean waters are nearly uniformly COLD, often just above freezing for their salt concentration (roughly 35 parts per thousand.) This ensures the coast of SOCAL has cold water except for some surface heating in summer. I liked diving but the least favorite part (after JAWS) was the cold water.
We lived in NW Ohio for almost 8 years and the abandoned limestone quarries filled with spring water when they quit pumping them out. One of the larger ones my family fished was stocked with rainbow trout and even had a roped off area used for a swimming pool. If you dove from the high dive and didn't level out or turn for the surface but let your momentum take you deep you found some extremely cold water that would put chill bumps on your chill bumps. Of course this was without a neoprene suit.
Pat