lab 1 : meteo 003 due: friday, sept. 4 th in class

Lab 1 : Meteo 003Due: Friday, Sept. 4th in Class

Sec 3: Josh Gugel email: jig5374@psu.edu Sec 2: Zach Gellis email: zmg5025@psu.eduOffice Hours: Thursdays 2-3 PM or by appointment Office Hours: Thursdays 4-5 PM or by apptLocation: 6th Floor Walker Wx Center (room 606) Location: 6th Floor Walker Wx Center (606)

Tips for Labs

• Don’t wait until the last minute

• Look over the problems before Wednesdays and come prepared with questions

• Come to office hours for help on Thursdays

• Form study groups and work together, but no answer copying!

• Complete all the problems and show all your work for partial credit

Lab 1

• Covers Chapters 1 & 2• Topics Covered:

GeographyUnit ConversionIsoplethingGradientsRadiation

-Stefan-Boltzmann Law-Wien’s Law-Incoming/Outgoing Radiation Budget

• 40 points total w/ 5 Extra Credit points possible

1.1 pg. 33

a)State Geography• Making sure you know geography of the country• Simply list the state names• Whip out an atlas or google maps if you need help, especially for part

(b)

1.4 pg. 36

Converting Temperature Units• Temperature commonly measured in 3 different units• Absolute zero is 0 K• Convert to ᵒC and ᵒF

• ᵒC = K - 273.15 ᵒF = (9/5)* ᵒC + 32

• Equations also found on pg. 10• Remember order of operations

1.7 pg. 38

Isoplethinga)• Isopleths are lines of equal value• Allows you to visualize maps easier• Start with benchmark values to isopleth• Want lower values on one side and greater values on other• Be sure to label lines• Example

1.7 cntd…

b)• Isopleths can close on themselves to form a circle• Use the same method as (a)c)• Real-world example• Take your time since it’s a bit tougher• Procedure remains the same

Isopleth Examples

• Most weather maps will have some type of isopleth• Common examples are

-Isotherm: temperature-Isobar: pressure-Isotach: wind speed-Isodrosotherm: ???

1.10 pg. 41

*NOTE: no (b)Gradientsa)• Gradients used to measure change in one variable over another

variable• Here, • Distance is constant for all paths (30 km)• Read the question fully• Don’t forget units

Gradient Example

• What is the gradient from G to H?

G

H

1.10 cntd…

c)• Interpret what the gradients mean physicallyd)• Read the question fully to help you answer it• Remember your wind directions (East wind = blowing from the East)• Give reasoning behind your answerse)• Refer back to part (d) and follow the same guidelines

2.1 pg. 75

Stefan – Boltzmann Lawa)• Stefan-Boltzmann Equation,

where, E = energy emitted by object, = constant, and T = temperature of object

• Don’t forget to convert to Kelvin• Ratio is simply, b)• Apply the Stefan-Boltzmann equation

Stefan-Boltzmann Law Example

• What is the ratio of energy emitted per unit area of a campfire and a human body? Assume the average temperature of the objects is 600 and 32 respectively.

2.1 cntd…

c)• Read the question fully for clues• Think of how our planet is heated• Do further research• Fully explain your answer

2.2 pg. 75

Wien’s Law• Amount of radiation object emits depends on its temperature• Wien’s Law can solve the wavelength of max emission given an

object’s temperature , where λ = wavelength and T = temperature

• Make sure temperature is expressed in Kelvins

Wien’s Law Example

• Calculate the wavelength of maximum emission for Neptune if the average temperature is -200

2.6 pg. 77

Incoming/Outgoing Radiation Budget• Big Hint: think of how much radiation is being emitted by the object• Use past problems to help• Is this more or less than what the object is absorbing?• Interpret your results with reasoning

Biggest Tips for Lab 1

• Make sure you convert temperature to Kelvins• Don’t forget units• Read the questions fully, many have hints to help you• Answer every question• Give reasoning when asked to explain• Come for help if needed

Meteo 003 TA Office Hours• All of our office hours will be held on Thursdays• We are all available by appointment if needed• Feel free to come to any of us for help

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

Lab 1 Assignment Summary:Chapter 1: 1.1a,b; 1.4; 1.7a,b,c; 1.10a,c,d,eChapter 2: 2.1a,b,c; 2.2; 2.6