ATOC/ASEN 5235 Homework #3 Due Thursday, 23 September Please staple all pages together! Each problem is worth 25 points 1. Petty 2.3. The atmospheric boundary layer is that region near the surface that is "well-mixed" by mechanical and/or convective turbu

Homework Problem Set #5 ATOC/ASEN 5235, Fall 2010 Due Thursday, 28 October 1. 10 points. Petty 7.5. At a certain wavelength in the visible band, the optical thickness of the cloudfree atmosphere is * = 0.2. Determine the transmittance of sunlight at this

ATOC/ASEN 5235 Homework #4 Due Thursday, 30 September Please staple all pages together! All problems worth 10 points 1. Petty problem 5.2. A field of snow that is just starting to melt is a special case, in that absorbed solar radiation will contribute pr

Chapter 8 Atmospheric Emission
1
Perspective: Radiation traversing a medium can be extinguished by absorption or scattering out of the path, enhanced by scattering into the path, and enhanced by emission into the path. Chapter 7: Extinction (absorption or

Chapter 7 Atmospheric Transmission
1
Chapter 7. Atmospheric Transmission
Beer-Lambert-Bouguer Law: F = F0 exp (kx)
Bouguer-Lambert Law: Change in irradiance is proportional to path length and incident irradiance k is the absorption coefficient: units = cm

Chapter 6 Thermal Emission
1
Four concepts regarding thermal emission: Planck Function
Describes the maximum amount of radiation that an object can emit. Unique function of the radiation wavelength and object temperature. Any object that emits according t

Chapter 5 Radiative Properties of Natural Surfaces
1
Chapter 5. Radiative Properties of Natural Surfaces
Absorptivity (a, unitless): Fraction of incident radiation that is absorbed. Reflectivity (r, unitless): Fraction of incident radiation that is reflec

Petty Chapter 4 Reflection and Refraction (and Transmission)
1
Recall: The electric vector describing EM radiation is given by:
A(x,t) = Ao exp[ i (kx - t) ] = frequency (cycles s-1, Hz) = # crests that pass a given point each second = circular frequency

Stratospheric Ozone
1
Homework: Analyze data from the Polar Ozone and Aerosol Measurement (POAM) III instrument
Characteristics of Solar Occultation Measurements Occultation: The disappearance of a star, planet, or other celestial body as it moves out of

Chapter 2: Electromagnetic Radiation
E&M Principle (Maxwell's Equations): A changing electric field induces a magnetic field, and a changing magnetic field induces an electric field. What is Electromagnetic Radiation? Classically, radiation is considered

General Atmospheric Science Review
Goal: Review basic concepts and terminology What is it we're really investigating through atmospheric remote sensing?
1
The Climate System
Science Goals: (1) To understand how all of the natural processes in this system

ATOC/ASEN 5235 24 August 2010
Today: Welcome! Overview of the Atmosphere (Chapter 1) Homework #1 Posted: Due 2 September IDL Problem #1 Posted: Due 2 September Continue overview and start Chapter 2 IDL Tutorial with Mark Piper Duane Physics computer lab (

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; ;IDL9.pro ;First define the data for 1 October from both POAM and MLS restore,'cat_poam3_v4.0.2005' restore,'o3_poam3_v4.0.2005' bad=where(mix eq -99 or mask eq -99 or err gt 200) ;find bad values mix=1.e6*mix ;convert mixing ratio to ppmv mix(bad)=-99

; ;IDL8.pro ;plot out the weighting function for different optical depths ;W(z) = (m tau* / H) exp(-z/H) exp[-m tau* exp(-z/H)] ; m = 1 for nadir m=1.0 ;(zenith) tau=[1,10,100] ;total atmosphere optical depth H H=8. ;scale height (km) z z=findgen(50) w=fl

; ;IDL problem 7 ;(a) Plot out the MLS measurement longitudes (x axis) vs. latitudes (y axis) on October 1. ;Overplot the POAM measurement longitudes & latitudes for this date. ; ;(b) Make a map of the longitudes and latitudes of the MLS measurements for

;HW6.pro - Make a contour plot of ozone mixing ratios in the NH and SH, and ; also plot out standard deviations at 20 km. restore,'cat_poam3_v4.0.2000' restore,'o3_poam3_v4.0.2000' bad=where(mask eq -99 or err gt 200) mix(bad)=-99 ;set bad data to -99 goo

IDL Problem #6 6. Due Tuesday, 19 October. 3. (50 points). Using IDL and the same POAM data files that you have been working with: (a) Reproduce (at least approximately; feel free to choose your own color tables, fonts, etc.) the color contour plots below

;IDL5.pro ;(a) Plot out the Planck function for temperatures of 100, 300, 500, 6000 K in both ; frequency and wavelength ;(b) Overplot the limiting cases ;(c) Calculate the maximum value of the Planck function using Wien's displacement law to ; find the w

IDL Problem #5 Write an IDL computer code to: (a) Plot out the Planck function hemispheric spectral irradiance for temperatures of 100, 300, 500, and 6000 K as functions of both frequency and wavelength. Assume the source is isotropic. Make separate plots

;IDL4_mix.pro - Show how the vertical distribution of ozone changes from Aug through Oct ; in the SH and from Feb through April in the NH ; ;Plot out monthly average ozone mixing ratio restore,'cat_poam3_v4.0.2000' r restore,'o3_poam3_v4.0.2000' n nz=n_el

;IDL4_den.pro - Show how the vertical distribution of ozone changes from Aug through Oct ; in the SH and from Feb through April in the NH ; ;Plot out monthly average ozone density restore,'cat_poam3_v4.0.2000' r restore,'o3_poam3_v4.0.2000' n nz=n_element

; ;Reproduce Petty Figure 4.5. ;Program to reproduce Figure 4.5 in the text. t thetai=findgen(91) ;0-90 degrees in 1-degree increments t thetairad=thetai*!pi/180. n1=1.0 & n2=1.33 m = n2/n1 thetatrad=asin(sin(thetairad)*n1/n2) t thetat=thetatrad*180./!pi

; ;IDL2.pro restore,'cat_poam3_v4.0.2000' r restore,'o3_poam3_v4.0.2000' errlim=100 ;Define the maximum allowed % error bad=wherE(mask eq -99 or err gt errlim) ;find out where the "bad" values are m mix(bad)=-99 ;set all mixing ratios to -99 if they're kn

;homework1.pro - Program for homework #1, problem #1. ; Write an IDL code to plot a line with y-intercept of +2 and slope of -3.5. ;Define the plotting environment set_plot,'ps' ;Tell IDL to send the output to a postscript file called idl.ps. d device,/bo

Content of IDL save files for IDL problem #2: Note: Fill values are denoted with -99 File: cat_poam3_v4.0.2000 ALTITUDE: Floating point array with 121 altitudes from 0-120 km. COMMENT: String array with 5 elements explaining some of the arrays. DATE: Long

IDL Problem #1 Due Thursday, 2 September Please staple all pages together! Write an IDL code to plot a line with y-intercept of +2 and slope of -3.5. Your plot should have the following characteristics: Horizontal axis should range exactly from -10 to 10.

ATOC/ASEN 5235 IDL Problems Unless otherwise stated, turning in your code with your plots is optional. If you do turn in the code, I will attempt to give coding suggestions if there are obvious deficiencies in your plots. 1. Due Thursday, 2 September. Wri

Homework Problem Set #7 ATOC/ASEN 5235, Fall 2010 Due Tuesday, 30 November 1. (20 points). Petty Problem 9.2. Equations 9.11 and 9.12 imply that the angular velocity of an object can only take on discrete (quantized) values. Explain why this quantization