I think you are probably talking about the fact that frozen water (ice) is less dense than liquid water, so freezing temperatures will enable the ice to form on top of the waterbody, but still allowing liquid water underneath so fish can survive. Also, ice is usually translucent, so it can still penetrate the ice, allowing algae to continue to photosynthesize, providing oxygen for the fish below.
Water is at its densest at about 4 degrees Celsius, so ice floats. The ice stops evaporation and insulates the water below. The lake could freeze solid all the way down, but most lakes do not.
It's the fact that water expands as it freezes so ice that forms on the surface stays on the surface because it's less dense than the liquid water, if it got denser when it froze the ice would sink to the bottom and thus the fish would die. So because it expands the ice stays on top, and water stays at the bottom where the fish can stay alive.
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Winter: Below Zero; Summer: Anywhere from the 90 degree area to the early 100 degree area.
great drakeensberg escarpmetnt
Temperatures in Utah vary greatly from season to season and region to region. In the winter, temperatures in the northern part of the state reach below -10 F. Summer temperatures in the north are typically in the 90's with several days over 100. In the south, winter temperatures typically don't drop below 20, but summer temperatures over 110 can be expected. It is not unusual in some parts of Utah for the night temperature to be in the 30's and the daytime temperature to be in the 70's.
The coldest winter ever recorded in the United States was in 1978. Temperatures were dropped 12-16 degrees below normal, and affected mostly 48 states.
then you are awesome
Water expands as it freezes so becomes less dense than liquid water. Ice floats to the surface leaving liquid water (for fish to swim in) below the surface ice.
Latvia has a moderate climate with four distinct seasons. Winter's have become warmer but the average winter temperatures are still bjust below zero. Average summer temperatures are in the high teens with daytime temperatures in the mid twenties.
Sleet requires temperatures to be below freezing in the lower part of the atmosphere and at the surface, so yes, it occurs in the winter.
Winter: Below Zero; Summer: Anywhere from the 90 degree area to the early 100 degree area.
the climate for the Iroquois was warm summers and cold temperatures in the winter which could go below zero
permafrost
The contrast is greater in the Winter. The equatorial temperature is relatively stable throughout the year ... always what I call 'hot'. Temperatures in the Arctic region ... for example on Alaska's North Slope where this writer has personal experience ... can remain below zero for long stretches during the Winter, but are equally likely to remain "shirt-sleeve" during the Summer, often even hitting the 80s and 90s.
The Iroquois had warm summers (about the 70's) but cold temperatures in the winter which could go below zero.
great drakeensberg escarpmetnt
Temperatures are below 0, hence with negative temperatures arises higher wind pressure hence damaging the environment.
In the winter, temperatures can drop to below freezing!
gobi desert