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23 Cards in this Set

  • Front
  • Back
What is Geography?
The study of human activity as it varies over states
What is Weather?
What's happening outside
What is Climate?
The long-term factors (characteristics)
What is a station model?
Provides weather data for locations around the country.
What is the Dew Point?
Measure of moisture in the air - it's the temperature where dew forms.
What has to take place for dew to form?
Air has to be cooler than current temperature to cuase dew to form or air is saturated)
What is the Dew Point Depression?
DPD = T - Td
DPD = 0°F
-->Rh = 100%

As DPD gets larger, the RH gets smaller
As air cools, it can't hold as much water, resulting RH going up (T/F)
As air warms, it holds less water, resulting in RH going down
False: As air warms, it holds MORE water, resulting in RH going down
If the code is LESS than 500:
1. Add "10" in front
2. Add decimal poitn b/w last two digits

ex. 136 = 1013.6 mb
If the code is GREATER than 500:
1. Add "9" in front
2. Add decimal point b/w last two digits

ex. 791 = 979.1 mb
What is pressure tendancy?
Millibars/3hrs. - put decimal point before last digit

ex. +20 = 2.0 mb/3hrs.

+ weather is improving
- weather is going downhill
Wind Direction Practice
**practice wind directions and speeds**
What is Wiens Law?
k = Wavelength of maximum emission times temperature

-energy can be emitted, reflected or trasmitted
What is Emit?
To give off
What is Reflect?
Bring back
What is Transmit?
To send through

-the earth absorbs a lot of high energy radiation which means the temperature in the upper thermospher is really hot. Also, in the ozone layer, the ultraviolet rays are taken out. The infrared waves that the earth gives off, are not transparent in the atmosphere, unlike the visible light that comes through the atmosphere.
What is Isolation?
Incoming solar radiation
What is Terrestrial?
Radiation that is emitted from the earth

-The ozone layer, carbon dioxide, methane, CFC's and water vapor absorbs the infrared rays or terrestrial radiation. This group of gases ic alled Greenhouse Gases. Water is the only one of these gases that varies over space and time. All of these gases combined except water, comprise a lot less than 1% of the atmosphere. All of these gases are transparet to visible light. But, all of these gases absorb infrared radiation. Without any greenhouse gases, the earth's average temperature would be about 0 compared to the normal 60.
What are the gases in the atmosphere?
78% Nitrogen
21% Oxygen
.9% Argon
.1% Greenhouse Gases
What is the Greenhouse Effect?
The warming of the earth's atmosphere that results from the absorption of terrestrial radiation by greenhouse gases.
What is Natural Greenhouse Effect?
The warming that occurs from the natural occurence of greenhouse gases.
What is the Enchanced Greenhouse Effect?
The warming of the atmosphere that results from increased greenhouse gas concentrations caused by human activity.