if you live in the united states and go to Argentina in february, its warmer. That’s why a deep lake is still nice and cool, even when it’s broiling outside. — It's a bright summer day in West Michigan. During summer, thermally stratified lakes are warmer at the top and cooler at the bottom. Think about how in the summer, the ocean or a lake or even a swimming pool can still be pretty cold. In sharp contrast, cold-water species, such as lake trout can be caught during the warm water periods of summer, but only in deep and cool waters, as recognized by their core temperature preference. With a lake in part fed by groundwater (54 F), the lake will tend toward the groundwater temps. Typically stratified lakes show three distinct layers, the Epilimnion comprising the top warm layer, the thermocline (or Metalimnion): the middle layer, which may change depth throughout the day, and the colder Hypolimnion extending to the floor of the lake. Daylight Delight. It can absorb quite a bit of heat from the air before it actually sustains much temperature change. You've probably noticed this when swimming in a lake in summer - your shoulders feel like they're in a warm bath while your feet are chilled. In the summer season, areas located in the extreme north or south receive a lot of quality time with the sun. A lake’s role in moderating temperature. Sounds like it's time to enjoy the lake … Lake turnover is a phenomenon whereby the entire volume of water in a lake is mixed by wind. 5 reasons why summer is cool. Eventually, the epilimnion cools until the entire lake is the same temperature (isothermal). Please be respectful of copyright. Why it is warmer in the summer and cooler in the winter in Arkansas? Summer to Fall, and Winter to Spring: The lakes turn over. NOT TRUE!!! Water has a large heat capacity, whereas dry land does not. Hooray for summer! The warm surface layer is called the epilimnion, and the cooler bottom layer the hypolimnion. In summer, the top of the lake becomes warmer than the lower layers. But, in winter some lake surfaces can get very cold. It takes a lot of warm air for a lake to heat up! It is cooler by an ocean on a hot summer day, Because water has a more equable temperature than land, it changes less. This allows lake turnover to occur. Temperatures are in the 70s, but we have had plenty of 80 and 90 degree days over the past few weeks. Even with the record temperatures on the Great Lakes, that water is still several degrees cooler than adjacent land temperatures for much of the hottest part of this summer. Find out why this sunny season deserves a warm welcome. Then … Unauthorized use is prohibited. Don’t sleep on Lake of the Ozarks and Party Cove, where one of America’s greatest booze-fueled redneck lake parties rages all summer long. Lake stratification is the tendency of lakes to form separate and distinct thermal layers during warm weather. 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