Meteo 003: Lab 4Chapter 4: 14ab, 15c

Chapter 5: 4abc, 10ab, 18Chapter 6: 2ab, 7ab, 9acd

Chapter 7: 9ab

4.14a,b pg. 163

Isohyets: isopleths of rainfalla)-same guidelines as all isoplethsHint: you’ll have to draw circles in placesb)-prevailing winds are northeasterly-draw an arrow of the wind direction-air rises on windward side of a mountain

4.15c pg. 164

Heat Index/Apparent Temperature: the temperature the air “feels like” to a person when moisture is taken into accountc)

-temperature is in ᵒF -vapor pressure is in mb*note that the units do not work out, this is a simplified equation-when given dew point, substitute vapor pressure for equilibrium (or saturation, same thing) vapor pressure

Apparent Temperature Example

• Find the apparent temperature for a day given that the air temperature was 80ᵒF and the dew point was 70ᵒF.

5.4a,b,c pg. 200Type of Imagery Visible Infrared Water Vapor

Color Darker Lighter Darker Lighter Darker Lighter

Interpretation Clearer Cloudier Warmer Colder Drier Moister

a,b)-Connect concepts to images-Refer to pages 180-183 in the textbook-Water vapor imagery can only tell us about water vapor content in upper troposphere. Why? See pages 180-183.c)-Which form of radiation has wavelength in the range of 0.4-0.7 microns?

(for black and white or grayscale images)

5.10a,b pg. 205

a) -Which imagery is used to determine albedo?-Consider your answer from 5.4.c-High albedo = reflecting more, low albedo = absorbing moreb)-Which imagery reveals information about temperature?-Refer to table in previous slide

5.18 pg. 211

-Radar beams are sent out at an angle-For the snow showers to not be seen by the radar, what must be true?

6.2a,b pg. 243Pressure Gradient Force: the force that directs air from higher toward lower pressure. *always points from high to low pressure*perpendicular to isobars (gets from high to low pressure fastest this way)-Think about when you’re pumping up a sports ball and air comes out a)-Wind blows away from higher pressure and toward lower pressure-Make sure to draw about a dozen arrows b)-Would the pressure gradient force be different in the Southern Hemisphere?

6.7a,b pg. 248

-Surface pressure at different locations need to be converted to sea-level pressure to be able to compare -Pressure decreases with height in the atmosphere

a)-Use pressure decreases 10 mb for every 100 m of elevationEx) What is the corrected to sea-level pressure of State College, PA if the surface pressure was measured to be 965 mb and the elevation is 350 m?

6.7 cntd…b)-Pressure is lower at higher elevations-That’s why the air is thinner and harder to breathe in places like Denver, CO-How would a map of pressure look if left uncorrected to sea-level?

6.9a,c,d pg. 249

*NO part ba)-Identify Highs and Lows by finding relative maxima of closed isobarsc)-Wind barbs show the direction the wind is coming from-Consider how wind flows around High and Low pressure systemsd)-In general, the tighter the isobars, the faster the wind speed-This is due to a stronger pressure gradient force

7.9a,b pg. 300

-A warmer column of air will have higher heights on a given pressure surface when compared to a colder column of aira)-Determine which location is warmest, which is coldest?-How would the temperature of each location affect the height of any given pressure level?b)-Use the same concepts from part a but instead of different locations think of different seasons

Chapter 4: 14ab, 15cChapter 5: 4abc, 10ab, 18Chapter 6: 2ab, 7ab, 9acdChapter 7: 9ab

Astrid (ais5396@psu.edu): 10-11 AM in 623 WalkerJosh (jig5374@psu.edu): 2-3 PM in 6th Floor Walker Wx CenterZach (zmg5025@psu.edu): 4-5 PM in 6th Floor Walker Wx Center

Review Sessions will be held TuesdayLook out for more information about the time and location