Lec 3 Flashcards
What is the green house effect.
The trapping of radiation inside the earths atoms, warming the environment
What is the dominant gas in atoms?
N2 = 78%
What type of energy I light enters the earth.
Visible light.
What is absorbed and re-radiated by the atoms?
Infrared radiation
Weather
Short term or current atmospheric. Conditions
Air temp, precip, wind, clouds, humidity
What is climate
Long term trend in weather ever a defined area
Min 30 years
What are derived dimensions?
Combination of base units to make measurements
What is temp?
A measure of Aug molar kinetic energy
How fast moles are moving in a substance.
Uses k or any
What tools can measure temp?
Thermometric: materials that have a consistent response to temp chug.
Radiometric - measures the wavelength emitted by an object
Pressure
The force of a substance (air) applied over a defined area
Units of Kia or mb(milibar)
What measures pressure
Barometer, where mercury pushes on a metal box without changing volume.
Humidity
The water Vapor in the air, often in terms of relative humidity.
Relative humidity
The % of water vapour in the air in relation to how much would be in the air if it was fully saturated.
Temp dependant.
Vapor pressure
The weight in the air caused by H2O moles
In Pa or Mb
Absolute humidity
The mass of H2O in a given volume
Kg/ m3 or ma/m3
Mixing ratio
% Of air that is Vapor
Kg H2O / kg dry air
What measures humidity
Hygrometer
Mechanical: use of materials that expand or contract in H2O content
Electrical: uses conductive materials to measure change in electric currant with respect master
Precipitation
Any water particles that fall from the sky
Any physical form: rain, snow, hail, street
Rain
Liquid, or solid precipitation that has melted as it reaches the surface.
Freezing rain
Liqural precip that comes into contact wi cold air near the surface and freezes upon impact.
Sleet
Frozen precip that melts in shallow warm air but refreezes into solid.before hitting the grand
Snow
Frozen precip that remains frozen during falling duration.
How is wind direction measured
From the direction it is coming from in compass degrees
What tool measures wind
Anemometer
Latent heat
The energy absorbed or released during the phase change of a substance
Dew point.
He temp required for H2O Vapor to cool and condense into water
Specific humidity
The # of H2O moles are in the air
#G hzo / kg air
What causes law pressure
Rising air, commonly associated w clay, wet and windy weather.
What causes High pressure.
Sinking air common wi very sunny days in summer and winter.
