AOSC 621 - PHYSICS AND CHEMISTRY OF THE ATMOSPHERE II

 

Texts: Radiative Transfer in the Atmosphere and Ocean, Gary E. Thomas and Knut Stamnes, Cambridge University Press

Chemistry of Atmospheres, Richard P. Wayne, Oxford University Press

 

Lecturer: Professor Robert D. Hudson, Room 3421,

Computer and Space Sciences Building.

Phone 301-405-5394

E-mail hudson@atmos.umd.edu

 

The Department of Meteorology Web Site is www.meto.umd.edu

 

Lessons                        Tuesday and Thursday,  11am to 12.15 pm, in CSS 1113

 

Office hours    No set office hours will be posted. Students may come by my office at any time.  If you wish to make a formal appointment send me an e-mail

The two textbooks listed above cover most of the material given in this course.. However, as AOSC 621 covers both chemistry and physics the course consists of selections from the textbooks. PowerPoint presentations have been prepared for each class, these will contain any material not covered by either book. The .ppt files may be found on my web page: http://www.atmos.umd.edu/~hudson/meto621.d/

            A schedule of the classes, homework assignments, etc can also be found on the same web site - AOSC621intro.htm . This schedule gives the material to be covered in each lecture. as well as the dates of the homework assignments . The homework assignments will be posted on my web site. In addition to the homework a project will be assigned at about mid-term.. There will be two exams, a mid-term exam and a final exam. 70% of the final grade will be based on these two exams, 15% on the project, and the remaining 15% on the homework assignments.


 

 

 

METO 621 SCHEDULE, SPRING 2010

 

 

DATE

LESSON #

SUBJECT

READING

NOTES

26-Jan

1

Spectrum, radiative terms, Solar flux in UV VIS.

TS Chap 1, 1 to 16

 

 

 

Thermal emission in IR. Optical line of sight.

 

 

 

 

Atmospheric composition

 

 

 

 

 

 

 

28-Jan

2

Radiative Equilibrium and thermal structure

TS Chap 1, 17 to 29

 

 

 

Radiative forcing and feedbacks

 

 

 

 

 

 

 

2-Feb

3

Geometrical optics. Polar coordinates

TS Chap 2, 34 to 45

Homework 1 given out

 

 

Radiative flux

 

 

 

 

Intensity and Energy density

 

 

 

 

 

 

 

4-Feb

4

Extinction law. Radaitice transfer equation

TS Chap 2, 46 to 53

 

 

 

Lorentz theory for radiation/matter interactions

TS Chap3, 58 to 68

 

 

 

Scattering from damped harmonic oscillator

 

 

 

 

Resonance scattering and the Lorentz profile

 

 

 

 

 

 

 

9-Feb

5

Line broadening. Rayleigh scattering

TS Chap 3, 69 to 78

 

 

 

Scattering Phase function. Mie and Rayleigh

 

 

 

 

scattering phase functions

 

 

 

 

 

 

 

11-Feb

6

Planck's function. Absorption in molecular bands

TS Chap 4

 Homework 1 due

 

 

- vibrational and rotational levels. Ground state

Handout

 

 

 

populations

 

 

 

 

 

 

 

16-Feb

7

Absorption in Molecular bands - electronic levels

TS Chap 4

Homework 2 given out

 

 

Dissociation and Excitation. Photochemistry

Handout

 

 

 

Line strengths.

 

 

 

 

 

 

 

18-Feb

8

Principles of Radiative transfer. Boundary

TS Chap  5, 130 to 146

 

 

 

properties. Transmission through a Slab medium.

 

 

 

 

 

 

 

 

 

 

 

 

23-Feb

9

Absorption and scattering in Planetary Media.

TS Chap 5, 148 to 158

Homework 2 due

 

 

Radiative transfer Equation for zero scattering

 

 

 

 

Solution for zero scattering in slab geometry.

 

 

 

 

 

 

 

25-Feb

10

Gray slab medium in LTE. Formal solution

TS Chap 5, 159 to 164

 

 

 

including scattering and emission. Radiative

 

 

 

 

heating rates

 

 

 

 

 

 

 

2-Mar

11

Formulation of radiative transfer problems.

TS Chap 6, 170 to 175

Homework 3 given out

 

 

Separation into diffuse and direct components

 

 

 

 

Azimuthal dependence of radiation field

 

 

 

 

 

 

 

4-Mar

12

Scaling transformation for Anisotropic scattering

TS Chap 6, 177 to 196

 

 

 

Prototype problems in Radiative Transfer.

 

 

 

 

 

 

 

9-Mar

13

Reciprocity, duality. In media surface reflection

TS Chap 6, 197 to 210

Homework 3 due

 

 

Integral equation , Probability-Monte Carlo

 

 

 

 

 

 

 

11-Mar

 

Midterm Exam

 

 

 

 

 

 

 

15-19-Mar

 

SPRING BREAK

 

 

 

 

 

 

 

23-Mar

14

Approximate solutions of prototype problems

 TS Chap 7, 217 to 247

 

 

 

Separation into orders of scattering.

 

 

 

 

 

 

 

24-Mar

15

Two stream approximation - isotropic scattering

TS Chap 6, 248 to 263

 

 

 

Discrete Ordinate method. Adding-Doubling

TS Chap 7, 281

 

 

 

 

TS Chap 7, 320 to 323

 

 

 

 

 

 

30-Mar

16

Band models

TS Chap 11, 415 to 422

Project given out

 

 

 

 

 

1-Apr

17

Heating rates in the troposphere

Handout

 

 

 

 

 

 

6-Apr

18

Upwelling and downwelling intensities and flux

Handout

Homework 4 given out

 

 

for the thermal infra-red. Effects of clouds

 

 

 

 

 

 

 

8-Apr

19

Role of Radiation in Climate

TS Chap 12, 438 to 450

 

 

 

Radiative equilibrium with zero visible opacity

 

 

 

 

Radiative equilibrium with finite visible opacity

 

 

 

 

 

 

 

13-Apr

20

Photochemistry, adiabatic processes,

RW Chap 2, 95-135

Homework 4 due

 

 

Chemical kinetics

 

 

 

 

 

 

 

15-Apr

21

Multistep reaction schemes, Models

RW Chap 2, 136-147

 

 

 

Stratosphee, ozone only chemistry

RW Chap 3, 155-189

 

20-Apr

 

 

 

 

 

22

Perturbations in the stratosphere, Man's impact

RW Chap 3, 191-237

Homework 5 given out

22-Apr

 

 

 

 

 

23

Polar ozone hole, Variations and trends

RW Chap 4, 238-266

 

 

 

 

 

 

27-Apr

24

Tropospheric Chemistry - Sources, sinks,

RW Chap 4, 321-360

Homework 5 due

 

 

Oxidation, transformation, Biogenic species

 

 

 

 

 

 

 

29-Apr

25

Aromatic compounds, sulfur compounds

RW Chap 4, 361-402

 

 

 

halogens, heterogeneous reactions, models

 

 

 

 

 

 

 

4-May

26

Air pollution

RW Chap4, 403,443

 

 

 

 

 

 

6-May

27

Anatomy of a pollution event at College Park

Handout

 

 

 

 

 

 

11-May

28

Coupling of chemistry and radiative transfer.

Handout

Project due

 

 

Derivation of stratospheric ozone profiles

 

 

 

 

from backscattered solar ultraviolet.

 

 

 

 

 

 

 

13-May

 

FINAL EXAM

8.00 to 10.00 am

 

 

 

NOTES

 

 

 

 

RW Richard Wayne

 

 

 

 

TS Thomas and Stamnes