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BGSU - GEOG 1250 - Class Notes - Week 15

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BGSU - GEOG 1250 - Class Notes - Week 15

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background image Monday 4/25
 
Weather data collection o 7,000 ship locations o Airports are common locations for weather monitoring stations o Numerical forecasting ­ helps predict future changing weather (example ­­  predicting today's weather  is easy, but predicting the rest of the week is difficult, so 
we use numerical forecasting)
Short­term forecasts o Forecasts for 72 hours or less  o Often modified for local areas to account for geographic conditions and other  features (mountains, high sea levels, etc) Medium range forecasts o Forecasts for 72 hours ­ 1 week o Spaghetti model ­ lines connecting similar anticipated heights: red line reflects the overall average of atmospheric pressure Long range forecasts o Forecasts broader conditions (strays away from exact numbers and looks at  overall conditions like dew point, pressure, etc) o Predicts for a month or longer (seasons) o Provides temp and precipitation estimates for an entire period o Estimates large scale variables  Chaos Theory ­ Change in what's predicted vs. what happens grows and grows over time  ­­­ this is why short term forecasts are most precise Climate models ­ long term weather conditions (up to 100 years, and therefore least  precise) o Large scale patterns of natural features and occurrences Ice cover, fossil fuel consumption, population of humans o Do not try to predict each day, but rather large patterns over large periods of times o Accounts for anthanogenic and astronomic elements o The IPCC (Intergovernmental Panel on Climate Change) Releases large reports every 5 or 6 years   
 
REVIEW (Wednesday and Friday both)    
Atmospheric structure:
 
 
Solar radiation will work its way unaltered and to the ground ­­ greenhouse gases traps 
earth's infrared radiation
 
Ozone layer ­ stratosphere 
background image Weather ­ troposphere
Pressure decreases with height
 
 
Seasons are caused by the tilt of the earth
Insolation variation ­­ intensity of solar radiation is not that high because of the angle towards us,
which is why summer weather is still not unbearably hot   Solar 
declination
Latitude
in 
degrees
Calendar 
date
Seasonal date a. He misphere. 
Season

hemisphere
season
Daylight
Arc. 
Circle
Tropic 
cancer
23.5 June 21 Summer/June 
solstice
Summer Winter 24 
hours
Equator 0 September
21
September 
equinox
Fall Spring 12 
hours
Tropic 
Capricorn
23.5 December 
21
Winter/December 
solstice
Winter Summer 0 hours Equator 0  March 21 March equinox Spring Fall 12 
hours
  Latent heat is released in phase changes
Relative humidity ­ doesn’t tell how much water vapor is the atmosphere, but tells the ratio of 
how much water vapor is in the air vs. how much vapor it can hold at a given temperature Needs how much water vapor is in the air And needs how much vapor the atmosphere can hold at the given temp   Velocity couplet and hook echo ­ tornado   
Visible satellite imagery ­ not available 24 hours a day
Infrared imagery ­ color enhancement (red) cooler cloud tops and intense thunderstorms at 
higher altitudes. Warm locations ­ dark colors 
 
Mid latitude cyclone 
Maritime vs. polar
Tropical vs. continental
Occluded front ­ beginning of end for mid latitude cyclone and is where warm and cold 
front meet
  Passing of frontal boundary  Change in wind direction
Change in temp
Change in dew points
 

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School: Bowling Green State University
Department: Geography
Course: Weather and Climate
Professor: Marius Paulikas
Term: Summer 2015
Tags:
Name: Week 15 notes
Description: Review notes and last topic notes (topic 14)
Uploaded: 04/27/2016
3 Pages 18 Views 14 Unlocks
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