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meteorology Ch 4/6
ch 4/6 test
41
Meteorology
12th Grade
03/09/2011

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Term
infrared hygrometer
Definition
measures humidity by measuring the amount of infrared energy absorbed by water vapor
Term
heat index
Definition
combines air temp with relative humidity to determine an apparent temperature
Term
hair hygrometer
Definition
measures relative humidity with human hairs
Term
saturation vapor pressure
Definition
the maximum pressure that water vapor would exert if the were saturated
Term
air parcel
Definition
an invisible balloon like body of air
Term
absolute humidity
Definition
the density of water vapor in a given volume of air (mass of water vapor/volume of air)
Term
evaporative cooler
Definition
used to cool the air in hot, dry climates
Term
sling pyychrometer
Definition
uses wet bulb and dry bulb temperatures to obtain relative humidity
Term
adiabatic
Definition
a parcel of air expands and cools or compresses and warms with no interchange of heat with its surroundings
Term
specific humidity
Definition
the mass of water vapor in a given mass of air
Term
trees rivers lakes glaciers
Definition
4 things that evaporate besides oceans
Term
heat index
Definition
combination of heat and humidity
Term
water vapor denisty
Definition
another name for absolute humidity
Term
morning
Definition
when is RH highest?
Term
runoff
Definition
precipitation absorbed by land
Term
pacific
Definition
what ocean does el nino occur
Term
1200 years
Definition
how far back can el nino be traced
Term
longer beaks to shorter beaks
Definition
what changed on the finches on the galapagos islands b/c of el nino
Term
water warms, wind pauses, fluccuations
Definition
evidence that an el nino is occuring
Term
evaporation and more moisture in the atmosphere
Definition
how do higher sea surface temps lead to more water vapor in the atmosphere
Term
1000x
Definition
how much more dense is water than air
Term
latent heat
Definition
what is released in atm when water vapor condenses
Term
upwelling
Definition
upward movement of cold bottom air away from coast
Term
downwelling
Definition
downward movement of warm air toward coast
Term
upwelling=cooler water
Definition
why cali doesnt normally get t storms in summer
Term
relative humidity
Definition
the % of water vapor in the air compared to that required for saturation
Term
wet bulb temp
Definition
lowest temp that can be attained by evaporating water into the air
Term
dew point
Definition
temp which air must be cooled for saturation to occur & best indication of actual amount of water vapor in air
Term
hydrologic cycle
Definition
circulation of water within the atm
Term
dew point temp/air temp or water vapor content/water vapor capacity
Definition
RH formula
Term
saturation
Definition
when evaporation and condensation are equal to each other
Term
mixing ratio
Definition
mass of water vapor/mass of dry air
Term
changing airs water vapor content and changing the temp
Definition
2 things that can change RH
Term
30 degrees latitude
Definition
deserts located where
Term
wet bulb depression
Definition
difference between the wet bulb temp and dry bulb temp
Term
dry adiabatic rate DAR
Definition
rate at which temp of dry air parcel drops as it rises and expands
Term
moist adiabatic rate MAR
Definition
rate at which temp of a saturated air parcel drops as it rises and expands
Term
environmental lapse rate ELR
Definition
rate that temp of atm drops as altitute increases
Term
absolutely stable, absolutely unstable, conditionally unstable
Definition
3 general groups of types of air
Term
absolutely stable air
Definition
condition when DAR is more than ELR
Term
absolutely unstable air
Definition
condition when DAR is less than ELR
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