lecture August 23
temperature bipolarity | ||
103.4 degrees | ||
decreases | ||
epilimnion | ||
lowest and often coldest level of a lake | ||
Top layer of a lake | ||
middle layer of a lake | ||
metalimnion | ||
area in a lake where the temperature gradient is greater than that of the area above that is warmer and the area below that is colder | ||
pertaining to the 24 hour period of a regular daily cycle | ||
the deep bottom of the lake | ||
middle of the lake | ||
marginal area; sides of the lake ecept in especially steep lakes | ||
organisms that float on the surface film of open water | ||
2 turnovers; spring and fall | ||
decreases | ||
one mixing/turnover event annually | ||
-tropical area with little temperature change that may have a slight cooling period -frozen lake that has a short thawing period in the spring or summer | ||
never has a turnover | ||
-permanently frozen -uniform environment; tropical all the time without thaw -lake with a depth greater than 1mile (only see turning above thermocline) | ||
multiple mixes | ||
if the wind blows on a shallow lake i.e Lake Utah | ||
indicative of the type of fluid flow... turbulent or smooth flowing--larger the number the greater the turbulence |