Ch 3 Flashcards
(19 cards)
Frostbite
Skin actually freezes and discolors
Hypothermia
Body temp drops below normal
That is your body loses heat faster than it produces it
Most hypothermia occurs between freezing and 50F snow vs. rain, the wet really matters!
“Died of Exposure”
Wind chill index
Factors in both temperature and wind
Body’s perception
Sensible temperature
How we exchange heat energy with environment…which can be different in conditions with the same temperature
Heating degree day
People begin using heat when temperature drops below 65 degrees
Cooling degree day
People begin to cool when temperature climbs above 65 degrees
Growing degree day
Mean daily temperature 1 degree above the base temperature for a crop
Hottest temp recorded
134 degrees in Death Valley, California
Worlds Lowest temperature
-129F in Vostok, Antarctica
The controls of temperature
Latitude, land and water distribution (water warms and cools much more slowly than land), ocean currents, elevation (temperature decreases with height in the troposphere)
“Normal temperature”
A 30-year average of high or low temperature
“Mean (average) temperature”
The average of the high and low temperature for the day
Methods of protecting crops from the cold night air:
Cover (insulation), heaters (add heat to the system), wind machines (mixing), irrigation (water takes more energy to cool), ice it down (the act of freezing repeatedly gives off heat energy inside)
Anytime I think about _______, I need to think about _________
Moisture, latent heat
______ regions often have a smaller _____ range
Humid, diurnal
Remember _____ is a greenhouse gas
Vapor - so at night the humid air absorbs some of the outgoing radiation and radiates a portion of it to the ground
Diurnal
Daily cycle
Overnight the surface is cooler than air just above it, why?
Inversion- temps increase with height
Each ____ is like a tiny ______!
Day, season
Daytime heating, nighttime cooling
