*Instructor: *Professor Chris Bretherton

704
Atmospheric Sciences Bldg., 685-7414

breth@washington.edu
(office hours 1:30-2:30 MW or by appointment)

*Lectures: *Tu 1-3, Th 1-2:20; ATG 406

*Prerequisites: *505 (fluids) or permission of instructor

*Recommended Text: ** The Atmospheric Boundary Layer*, by J. R.
Garratt, 1992, Cambridge University Press, 316 pp. (available at
University Bookstore)

*Course Description: *

Turbulence and turbulent fluxes, averaging. Convection and shear instability. Monin-Obukhov similarity theory, surface roughness. Wind profiles. Organized large eddies. Convective and stably stratified boundary layers. Energy fluxes at ocean and land surfaces, diurnal cycle. Cloud-topped boundary layers. Measurement technologies. Boundary layer modelling and parameterization.

*Grading*

- Homework (50%): you may collaborate on this, though I ask that you write your own Matlab scripts and description of results. To minimize paper use, please email me any supporting Matlab scripts as attachments when you submit your assignment.
- Term project (50%) on some topic of your choice related to the class (please see me for approval of your proposed topic). Each student will do a 15-20 minute oral presentation on their topic during a special 2 hour class session early in finals week, and hand in a 5-10 page written report, due under my office door or in my mailbox by 5 pm on We 16 Mar.

*Lecture notes* (pdf). I plan to update the notes as we go
along, so you might not want to print them out more than a day in
advance. The overall structure will not change, however.

- Lecture 1 Introduction; instabilities
- Lecture 2 Turbulent flow
- Lecture 3 Turbulent fluxes and TKE budgets
- Lecture 4 Boundary layer turbulence and mean wind profiles
- Lecture 5 Surface roughness and the logarithmic sublayer
- Lecture 6 Monin-Obukhov similarity theory
- Lecture 7 BL wind profiles and large eddy structure in convective and neutral BLs
- Lecture 8 Mixed layer and K-theory parameterizations of BL turbulence
- Lecture 9 Nonlocal parameterizations of BL turbulence
- Lecture 10 Surface energy balance
- Lecture 11 Surface evaporation and soil moisture
- Lecture 12 Diurnal cycle over land
- Lecture 13 >Lecture 13 - Stable boundary layers - only present highlights
- Lecture 14 notes and slides Oceanic and cloud-topped BLs - observations
- Lecture 15 Cloud-topped physical processes and mixed layer modeling. Figures (ppt)
- Lecture 16 Cloud-topped mixed-layers II
- Lecture 17 Shallow cumulus convection -->

*Class Schedule Notes*

- No class Tu-Th 11-13 Jan, Th 10 Feb, Tu 15 Feb - Instructor travel.

**Handout**: Stull, Ch. 10: *
Measurement and Simulation Techniques*

**Homeworks**

- Homework 1 (Due Tu 1 Feb)
- rf18L1.txt for HW1, p3.
- psduw.m for HW1, p3b.
- highpassw.m for HW1, p3c.
- Homework 1 solutions
- hw1p3.m Matlab script for solving HW1p3.
- Homework 2 (Due We 16 Feb in my mailbox/under my door)
- Homework 2 solutions
- hw2p1.m Matlab script for solving HW2p1.
- hw2p23.m Matlab script for solving HW2p2-3.
- Homework 3 (Due Tu 1 Mar)