Cooperative Institute for Research in Environmental Sciences at the University of Colorado Boulder

AT730 - Mesoscale Modeling - Spring 2006

Spring 2006

AT730 - Mesoscale Modeling, 3 Credits

Location: Room 212B, ACRC; 12:00 - 3:00, Wednesdays

NOTE: The first class will be held on Friday, January 27th from 9:20 AM - 11 AM in 100 Atmospheric Science.

The previously scheduled date of January 25th is incorrect.

Required Text


Hardcover - 676 pages 2nd Edition 2002
Academic Press; ISBN: 0125547668

View Table of Contents

A message from Dr. Pielke:

Hi AT 730

Based on feedback I have received our first class meeting will be Friday Jan 27th at from 9:20am-11am in 100 Atmospheric Science.

The first reading assignment is Chapter 1-3 (pages 1-40). I will also relate project opportunities as well as overview what we will cover during the semester.

I look forward to meeting each of you, if we have not already!


Date: Fri, 13 Jan 2006 13:41:21 -0700 (MST)
From: Roger Pielke <>

Hi All, As a P.S. to what Dallas has sent out, our regular class times will be Wednesdays from noon to 3pm with a break at the middle. There will be no class the 18th (which we will make up), and the class on Jan 25th needed to be moved to Friday the 27th at 9am-11am due to a conflict with a conference in Boulder. This time was selected after polling the students who had registered, but several of you have added later. For those, please
contact me if the Friday class does not work, and we will work something else for your situation.

The regular Wed class time will begin on Feb 1. Please visit the class website for the first reading assignment.

I look forward to meeting all of you!

Roger P.

Date: Fri, 27 Jan 2006 16:08:55 -0700 (MST)
From: Roger Pielke <>

Hi AT 730

For Wednesday, we will continue discussing Chapter 4 and start Chapter 5. Please ask questions as needed, as I would like to have a discussion on
the issues that are presented in the text.

Also, Dallas will be posting several typographical corrections (Thanks Erica!) on the book url location /publications/errata.pdf /publications/errata.pdf. Please let Dallas and I know when you find more.

A reading assignment for Wednesday is to read Pielke, R.A. Sr., and R.W. Arritt, 1984: A proposal to standardize models. Bull. Amer. Meteor. Soc., 65, 10, 1082.

Also, Pielke, R.A., L.R. Bernardet, P.J. Fitzpatrick. S.C. Gillies, R.F. Hertenstein, A.S. Jones, X. Lin, J.E. Nachamkin, U.S. Nair, J.M. Papineau, G.S. Poulos, M.H. Savoie, and P.L. Vidale, 1995: Standardized test to evaluate numerical weather prediction algorithms. Bull. Amer. Meteor. Soc., 76, 46-48.

This material will be referred to in the presentation of Chapter 10.








Date: Sat, 28 Jan 2006 16:21:01 -0700 (MST)
From: Roger Pielke <>

Hi AT 730, There are two more corrections that Erica has found in the text.

These are:

1. On page 17, the header at the top of the page should be "2.4 Conservation of Water".

2. On page 15, in the two equations in the middle of the page, the term that multiplies the second derivative in the Taylor expansion is delta x, not a partial derivative.

Dallas will also post these corrections on the web page.



Date: Mon, 30 Jan 2006 09:03:33 -0700 (MST)
From: Dallas Jean Staley <dallas@ATMOS.ColoState.EDU>

Subject: Re: equation 4-14 (fwd)

Erica found an error in Eq. 4-14 in the book. In equation 4-14 in the 2nd term on the RHS, there is a u_o". It should be u_i".

We will add it to our errata list. thanks Erica! dallas



Date: Wed, 1 Feb 2006 20:25:24 -0700 (MST)
From: Roger Pielke <
Subject: class for Wednesday Feb 8.

Hi AT 730, On Wednesday, we will continue to discuss Chapter 5. Please come with questions, if needed. The paper I mentioned today regarding overlap in scales of applicability between numerical and physical modeling is:

Avissar, R., M.D. Moran, R.A. Pielke, G. Wu, and R.N. Meroney, 1990: Operating ranges of mesoscale numerical models and meteorological wind tunnels for the simulation of sea and land breezes. Bound.-Layer Meteor., Special Anniversary Issue, Golden Jubilee, 50, 227-275.

See Figures 12 and 14, for example, for the overlap region between the two approaches and for a proposed application. We will discuss this paper in class on Wednesday. As I mentioned, I will be traveling from a talk in Denver that morning, so class will begin at 115pm. Please also e-mail me if you have any questions about what we have covered in the text so far.

Roger P.




Date: Thu, 2 Feb 2006 08:23:48 -0700 (MST)
From: Roger Pielke <>
Subject: LUT reference

Hi AT 730, To provide the framework for your evaluations of the parameterizations, please refer to the List of Presentations in ATMO 595E


Pielke Sr., R.A., T. Matsui, G. Leoncini, T. Nobis, U. Nair, E. Lu, J. Eastman, S. Kumar, C. Peters-Lidard, Y. Tian, and R. Walko, 2005: A new paradigm for parameterizations in numerical weather prediction and other atmospheric models. National Wea. Digest, in press.

We will be discussing in class. Roger P.


Date: Thu, 2 Feb 2006 13:18:29 -0700 (MST)
From: Roger Pielke <>
Subject: class parameterization projects.

Hi AT 730, So far I have two projects set as noted below:

1. Jih-Wang Wang: the Grell convection parameterization

2. David Stokowski; the Mahrer-Pielke radiation parameterization.

Please send me your selected one soon (or contact me to discuss). Roger P.




Date: Tue, 7 Feb 2006 16:20:06 -0700 (MST)
From: Roger Pielke <>
Subject: Reminder: Wed Feb 8 class starts at 115pm

Hi AT 730, Please refer to the class url for what we are covering in class tomorrow. I also will overview the main points of Chapters 2-4, and go through the project goal.See you at 115pm! Roger P.



Date: Thu, 9 Feb 2006 10:31:28 -0700 (MST)
From: Roger Pielke <>
Subject: class assignment

Hi AT 730, As we discussed yesterday, I would like you to program the forward, upstream differencing scheme (Eq. 10-13) and assess the amplitude and phase change per time step for C=0.1; 0.5 and 0.9 for 2, 4, 10 and 20 delta-x wavelengths. Use cyclic boundary conditions. Compare with the values in Table 10-1 (which were computed analytically). The values that you compute should be identical. Use whatever method that permits you to make this quantitative comparison.

On Wednesday, Feb 15, we will continue Chapter 10. Also, there will be no class on March 8. I would like to have a make-up class on Friday March 3rd. Please let me know times during that day that you cannot make it. Roger P.


Date: Thu, 9 Feb 2006 10:26:01 -0700 (MST)
From: Christopher L. Castro <>
Subject: Re: class assignment

Hi all: As I mentioned in class, if you have questions about the assignment, don't hestitate to ask me or anybody else in our group. I suggest you do the program in C or Fortran. Trickiest part is tracking the phase errors! --Chris


Date: Thu, 9 Feb 2006 12:14:55 -0700 (MST)
From: Roger Pielke <>
To: at730 
Subject: due date for exercise #1

Hi AT 730, I forgot to state the due date. It is March 1. Remember, you can work together on any of the assigned problems and project. Roger P.



Date: Fri, 10 Feb 2006 11:01:35 -0700 (MST)
From: Roger Pielke <>
Subject: Class on March 3rd

Hi AT 730, After receiving feedback, the AT 730 make up class will be held on March 3rd (since there will be no class on March 8) from 10 am-1230 pm. Dallas will send out a room number for it. We will have a break, if needed. Roger P.

PS - Class will be held in the CIRA South (large) Conference Room



Date: Fri, 10 Feb 2006 11:49:45 -0700 (MST)
From: Roger Pielke <>


Subject: project


Hi AT 730, Another parameterization project has been added:

Russ Schumacher: Lin et al warm cloud microphysics parameterization.

Roger P.



Date: Mon, 13 Feb 2006 14:25:30 -0700 (MST)
From: Roger Pielke <>
Subject: RE: my class

Hi AT 730, Dr. Leighton Cochran of CCP has graciously agreed to have the class visit CCP on March 8 at noon. Dallas will send out directions, and meet you there. This will be a very informative presentation and tour by an internationally outstanding wind tunnel modeling group.

Roger P.

P.S. See for a map to CCP Wind Engineering. Visit their website at to learn about their interesting research and facilities. We can meet at the Department to carpool to their facility. We will meet at 11:40 in the parking lot. Don't be late! Email if you want to volunteer to drive.



Date: Fri, 17 Feb 2006 07:18:57 -0700 (MST)
From: Roger Pielke <>

Subject: Leap Frog

Hi AT 730, As assigned in class on Wednesday, please perform an analysis of the leap frog-centered in space approximation of the advection in the same manner as with the forward upstream scheme. This will be more difficult as you need to properly start the integration (hint: use the analytic known solution).

On comparing the analytic solution (which is in the book) with the coded (numerical) solution, finding the value of lambda and phase is sufficient. By computing the decay (or in the leap frog scheme the lack of any decay for any wavelength), and the rate of movement of the wave in your numerical results, you can confirm the fidelity of your coding.

Questions to me if not clear! Roger P.



Date: Tue, 21 Feb 2006 09:24:22 -0700 (MST)
From: Roger Pielke <>
Subject: CIRA Seminar: John M. Brown, Wednesday, February 22, 2006 - 10:00 AM,
CIRA South Conf Room (fwd)

Hi AT 730, If at all possible, please attend this seminar. Then update us in class afterwards. Roger P.



Date: Wed, 22 Feb 2006 09:40:04 -0700 (MST)
From: Roger Pielke <>
Subject: class projects

Hi AT 730, To make sure that each of your projects are listed on our web site, please send Dallas your topic, and she will post, if not already there. Send by the end of this week.

Roger P.


Date: Wed, 22 Feb 2006 17:08:07 -0700 (MST)
From: Roger Pielke <>


Subject: Wed March 1 2006 class

Hi AT 730, For next Wednesday March 1, please read Chapters 11 and 12. Also, plan to discuss your progress so far on your project. In addition, I will send you the poster on the global mesoscale model that I mentioned in class today. Roger P.




Date: Wed, 22 Feb 2006 17:10:21 -0700 (MST)
From: Roger Pielke <>
Subject: Fw: An AGU poster (fwd)

Hi AT 730, Here is the poster.

Shen et al., 2005: Hurricane forecasts with a global mesoscale resolving model on the NASA Columbia Supercomputer preliminary simulations of Hurricane Katrina (2005). AGU poster.

Roger P.



Date: Wed, 22 Feb 2006 17:11:51 -0700 (MST)
From: Roger Pielke <>
Subject: Typo on page 381

Hi Again AT 730, There is a typo on page 381 equation 11-21. There is a "2" after "/" in the second right hand term. Thanks Erica!





Date: Sat, 25 Feb 2006 14:12:29 -0700 (MST)
From: Roger Pielke <>
Subject: new class project

Hi AT 730, I would like each of you (or in combination) to select one of the aspects below to assess with respect to the WRF model. Chris Castro has information on the details of the model.

1. numerical form and stability analysis of advection
2. same as above but for the pressure gradient force
3. same as above but for first order subgrid-scale mixing (if used in this form).
4. same as above but for the Coriolis force
5. horizontal mixing (smoother, if applicable).




Date: Sun, 26 Feb 2006 14:23:35 -0700 (MST)
From: Christopher L. Castro <>
Subject: Re: new class project

Hi all: In response to Roger's assignment, I suggest first to check out the WRF documentation on the NCAR MMM website. I can't remember if the tech manual is available on line. If not, you should be able to contact the MMM folks and have them send copies. --Chris



Date: Mon, 27 Feb 2006 15:45:36 -0700 (MST)
From: Christopher L. Castro <>
Subject: Homework comments 

Hi all: A lot of you who are taking the course have dropped by my office to ask for hints on the homework and write up. In your write up I suggest the following (though I will not be grading it):

1. A written description of the advection schemes and how you programmed them up. You may want to include your code.

2. Description of how the phase and amplitude errors were calculated. In particular, you should pay particular detail to the first since it is more difficult. Then discuss why the results you obtain numerically may differ from the results in Table 10-1.

3. Discuss the broader physical significance of the results and anything else you learned from doing the exercise. 

If there are any questions before the assignment is due, I will be available this week.




Date: Mon, 27 Feb 2006 20:42:58 -0700 (MST)
From: Roger Pielke <>
Subject: clarification of WRF assessment 

Hi AT 730, The assessment of the WRF model is in addition to the class projects (the LUTs). I would like brief presentations after Spring break. The extraction
of the information should, if needed, be done collaboratively, and presented to class in any convenient manner.

The reason to assess WRF is due to its increasingly high profile in the weather modeling community. WRF is an emerging topic. It also provides a framework that will permit you to evaluate any model. We will discuss further on Wednesday. Roger P.



Date: Wed, 1 Mar 2006 13:08:57 -0700
From: Erica McGrath-Spangler <>
Subject: Re: clarification of WRF assessment

Hi AT 730, Here's the pdf of the WRF documentation. I haven't looked at it too closely, but it contains a lot of information on WRF.


Erica McGrath-Spangler
Graduate Research Assistant
Department of Atmospheric Science
Colorado State University



Date: Fri, 3 Mar 2006 11:52:04 -0700 (MST)
From: Roger Pielke <>
Subject: Class March 22 

Hi AT 730, For class on March 22, we will begin to overview Chapter 6 and start Chapter 7. Next week (March 8) will be the wind tunnel field trip; please refer to Dallas's information as to where to meet and when.

For the WRF work, as agreed today, please send to Dallas for posting the specific terms that you will be assessing and presenting briefly to class. She will compile the list for the class website. We will plan for presentations on April 5, so you have time to complete.

On March 22, let us know your progress on your class projects (sending e-mails to the class list is okay).

Finally, I would like to see if we can have the class for the week of March 27th on Monday instead of Wednesday. Would Monday morning (sometime in the period 8am - 1pm NOT work for anyone?).

Roger P.


Date: Wed, 15 Mar 2006 07:46:06 -0700 (MST)
From: Roger Pielke <>
Subject: papers

Hi AT 730

I hope you are enjoying Spring Break! Here are two papers that might be of interest. Roger P.

Anquetin et al. 2005: The 8 and 9 September 2002 flash flood even in France: a model intercomparison. Natural Hazards and Earth System Sciences, 4, 1-14. PDF


Meneguzzo et al. 2004: Sensitivity of meteorological high-resolution numerical simulations of the biggest floods occurred over the Arno river basic, Italy, in the 20th century. J. Hydrology, 288, 37-56. PDF



Date: Thu, 16 Mar 2006 08:36:27 -0700 (MST)
From: Roger Pielke <>
Subject: Discussion on the dynamical core accuracy of WRF

Hi AT 730, I propose that those of you analyzing the numerical fidelity of elements of the dynamical core of WRF plan to present on Wed April 5. Please send Dallas the title/topic that you will overview and she will post early next week on the website. This should be an informative class. By juxtaposing with the numerical analysis that is presented in Chapter 10, we can decide/discuss if WRF improves on what is contained in the other regional models. Roger P.




Date: Mon, 20 Mar 2006 04:30:37 -0700 (MST)
From: Roger Pielke <>
Subject: seminar

Hi At 730, On Tuesday at two p.m. in the Cherokee Park room at the Lory Student Center, Professor Rafael Bras presents a seminar as part of Hydrology Days. His talk should include a very interesting mesoscale-related modeling component. You will find the talk very valuable, if you can attend.

Details on Hydrology Days can be found at:

See all of you Wednesday. Roger P.



Date: Mon, 20 Mar 2006 12:38:54 -0700 (MST)
From: Roger Pielke <>
Subject: Correction on the time of Rafael Bras's lecture (fwd)

Hi All, I sent you the incorrect time for Professor Bras's talk (thanks John for letting me know!). It is actually at 2pm tomorrow (March 21) at the Cherokee Room at the Lory Student Center. Please attend if you can. The url for his abstract is listed below.

It promises to be an informative lecture. Roger P.


Date: Mon, 20 Mar 2006 18:29:00 -0700 (MST)
From: Roger Pielke <>
Subject: forward/upstream and leap frog/second-order in space schemes

Hi AT 730, You should be completing the exercises (Thanks to those who have turned in). We will discuss in class on Wednesday; for those who have not turned them in, please do so soon.

We will also discuss when your class projects should be presented. The current plan is to make the presentations on April 26. Plan for a 15 minute talk. Your powerpoint slides will serve as your "paper". Roger P.


Date: Thu, 23 Mar 2006 07:33:06 -0700 (MST)
From: Roger Pielke <

Subject: Class Wed March 29

Hi AT 730, As a reminder, we will meet at the normal class time next week (Wednesday). We will not meet Monday.

On corrections to the book, two more are listed below. Dallas will add to the errata list on the website.

1. In equation 6-5, there is an equal sign before the del operator (right after x tilde superscript j).

2. In equation 6-70, there is no comma between u tilde superscript 1 and the partial derivative term of u tilde superscript 1 with respect to x tilde superscript 1.

Please let me know if these corrections are not clear to you. Roger P.


Date: Thu, 23 Mar 2006 13:57:45 -0700 (MST)
From: Roger Pielke <>
Subject: Class presentations

Hi AT 730, With respect to the parameterization presentations, I listed 15 minutes, but please use more time if needed (just let me know how much to budget). This is also true for the WRF talks. Roger P.




Date: Mon, 27 Mar 2006 12:26:45 -0700 (MST)
From: Roger Pielke <>
Subject: typo on page 214 equation 8-11 - Thanks Erica!

Hi AT 730, There is a typographical error on page 214 in equation 8-11. The term on the left side of the equal sign should be a capital "I", not a lower case "l" (they do look very close on the printed page). Roger P.


Date: Mon, 27 Mar 2006 13:49:56 -0700 (MST)
From: Roger Pielke <>
Subject: Typo on page 231 equation 8-54 Thanks again Erica!

Hi AT 730, There is a typo on page 231. The subscript to beta should be sub "a" not sub "q". Roger



Date: Thu, 30 Mar 2006 09:44:30 -0700 (MST)
From: Roger Pielke <
Subject: April 5 2006 class

Hi AT 730, For Wednesday's class (April 5), we will start with the WRF talks. Then continue into Chapter 9. Please bring questions/comments as you would like on any topic we have covered so far. Roger P.

Date: Thu, 30 Mar 2006 10:21:24 -0700 (MST)
From: Roger Pielke <>
Subject: value of higher order subgrid scale closure

Hi AT 730, An excellent question has been asked on the relative importance of the higher order terms in turbulence. We will also discuss this issue Wednesday.

To prepare, please read pages 202-225, 461-463 and 469-471 in Stull "An Introduction to Boundary Layer Meterology" (Kluwer Academic Publishers). A copy of this book should be in the libray (please do not check out but copy the pages, so others can obtain the text). Roger P.


Date: Tue, 4 Apr 2006 12:17:09 -0600 (MDT)
From: Roger Pielke <>
Subject: Cumulus Parameterization

Hi AT 730, In preparation for our discussions of cumulus parameterization in Chapter 9, please read the paper that is attached. Dallas will post as a hyperlink on the class website. Thank you John for alerting me to it!

The paper raises the issue as to whether the "superparameterization approach" or the "look-up table" approach is more feasible. Please be prepared to discuss when we come to this topic. Roger P.

Arakawa, A., 2004: The cumulus parameterization problem: Past, present, and future. J. Climate, 17, 2493-2524. PDF


April 4, 2006

View the figures provided by Norman Wood, Colorado State University PDF

These figures will be discussed in class on Wednesday, April 5, 2006.

Date: Wed, 5 Apr 2006 14:43:49 -0600 (MDT)
From: Roger Pielke <>
Subject: Wednesday April 12th class

Hi AT 730, Thank you again David, Erica, Russ, Nick and Jih-Wang for uniformly excellent talks today! Please, if okay with you, send Dallas your
powerpoint slides to be posted on our classweb site. This will provide important material for others to build on.

For our next class, Dr. Castro has agreed to present. He has very valuable expertise in the two topics he will be discussing, which we will all learn from. The class will start at 1pm.

If we have time, we then will start a discussion on the Arakawa paper that is listed on the web site. The framework will be on the relative value of
the LUT approach, business as usual, and the superparameterization approach.

For the April 19th, we will discuss Chapter 9 in the book. Please send any topics (papers) that you would like to also discuss, which we have not yet. Roger P.

Date: Wed, 05 Apr 2006 14:55:26 -0600
From: John Lin <>

The first half of the Arakawa paper also has a very nice discussion about the philosophy and history of convective parameterizations and goes through some of the conventional approaches (e.g., convective adjustment, Kuo, Arakwa-Schubert). It should be a good lead-in to Chris's talk as well.


Date: Wed, 05 Apr 2006 15:03:50 -0600
From: Russ Schumacher <>

Subject: papers

For anyone who may be interested in the kinetic energy spectrum/effective resolution issues, I would recommend checking out the following page:

The paper I referenced in my talk today is linked there, as is an interesting "white paper" regarding model diffusion. Russ


Date: Wed, 5 Apr 2006 17:48:08 -0600 (MDT)
From: Christopher L. Castro <>
Subject: References for 4-12 class

Hi all: Here are the KF references as a primer for next week's class:

Kain, J.S., 2004. The Kain-Fritsch Convective Parameterization: An Update. J. Appl. Meteor., 43, 170-181. PDF

Kain, J.S., and J.M. Fritsch, 1993. Convective parameterization for mesoscale models: The Kain-Fritsch scheme. The Representation of Cumulus
Convection in Numerical Models. Meteor. Monogr., No. 24, Amer. Meteor. Soc., 165-170.

**This reference is kind of obscure. You'll have to go to the library to get it. Or I have it in my files if you want a copy.

My dissertation on the Pielke website also has a summary of the scheme (in all its gory detail...)

Castro, Christopher Lawrence, 2005, Ph.D. Dissertation: Investigation of the summer climate of North America: A regional atmospheric modeling study. Department of Atmospheric Science, Colorado State University, 210 pp.

For the downscaling part of the talk, it will be my JGR paper (R-276 in reviewed publication on Pielke group website).

Castro, C.L., R.A. Pielke Sr., and G. Leoncini, 2005: Dynamical downscaling: Assessment of value retained and added using the Regional Atmospheric Modeling System (RAMS). J. Geophys. Res. - Atmospheres, 110, No. D5, D05108, doi:10.1029/2004JD004721.

See you all next week...


What is Convective Parameterization? PDF



Date: Tue, 11 Apr 2006 15:01:37 -0600 (MDT)
From: Roger Pielke <>

Subject: Wednesday April 12th class

Hi All, Two reminders for tomorrow. Class starts at 1 pm and Dr. Castro will be presenting. See you there! Roger


Date: Wed, 12 Apr 2006 15:05:01 -0600 (MDT)
From: Christopher L. Castro <>

Subject: Convective parameterization handout

Hi all: Mike Toy appears to have tracked down the source of the handout I gave you in class. Here are the updated versions available over the web:

Looks like they were originally prepared by Jack Kain himself. --Chris


Date: Wed, 12 Apr 2006 15:41:20 -0600 (MDT)
From: Roger Pielke <>
Subject: Class

Hi AT 730, Thanks again to Chris for very informative information! The discussion at our next class will continue on dynamic downscaling (Chris), and then we will discuss Chapter 9. Roger P.


Date: Wed, 19 Apr 2006 09:46:53 -0600 (MDT)
From: Roger Pielke <>
Subject: Wed April 19 2006 class

Hi AT 730, For today's class, Dr. Castro will continue his presentation. Then we will cover Chapter 9 in the text, and overview Chapter 13.

For the class next week, the class projects will be presented, and a class wrap-up will be done.

  • Nick Parazoo: The Mellor-Yamada Level 2.5 turbulence closure scheme in RAMS
  • Russ Schumacher: The Lin et al. warm cloud microphysics parameterization
  • Erica McGrath-Spangler: Soil respiration in GEMTM
  • David Stokowski: The Mahrer-Pielke radiation parameterization
  • Jih-Wang Wang: The Grell convection parameterization

See you at noon today. Roger P.


Date: Wed, 19 Apr 2006 16:53:26 -0600 (MDT)
From: Roger Pielke <>
Subject: Talks on April 26

Hi AT 730, For the class presentations on Wednesday, please send Dallas the length of time that you need, including 5 minutes at the end for Q&A. She will post on our website, and I will let others know of the talks. They should be very informative! Roger P.

Date: Fri, 21 Apr 2006 17:02:21 -0600 (MDT)
From: Roger Pielke <>
Subject: CIRA Seminar, Dr. Isidora Jankov, Tues, April 25, 2:00 PM,
CIRA South Conference Room

Hi AT 730, This seminar is very relevant to our class. Please attend if you can. Roger P.

Date: Mon, 24 Apr 2006 08:03:15 -0600 (MDT)
From: Roger Pielke <>
Subject: Special Seminar ATMOS/CIRA on May 1st at 3:30

Hi AT 730, This talk will be a good opportunity to relate to the subject of parameterizations (LUT as contrasted with the superparameterization
techniques) that we have discussed in class. Roger P.

Date: Wed, 26 Apr 2006 22:00:44 -0600 (MDT)
From: Roger Pielke <>

Hi AT 730, I want to thank Nick, Russ, Erica, David, and Jih-Wang for five excellent talks today! As I mentioned, Dallas will post on our website,
and I will alert others to the powerpoints which contain unique perspectives on the parameterization issue.

I will send you grades in the next few days, for those who are taking for credit and have completed all the assignments.

Best wishes in the continued pursuit of your advanced degree! Roger P.

Date: Thu, 27 Apr 2006 09:01:32 -0600 (MDT)
From: Christopher L. Castro <>

As a follow on to Roger's comment, I also enjoyed the class as well and hope I have the same caliber of students when I teach the course myself.
You all taught me a lot, too!

If I don't see you before I leave for my position at Arizona, I wish you all well in graduate endevours and hope the course was helpful. My door will certainly be open in Tucson if I can be of help in your research. I am sure Roger would say the same when he goes to Boulder this summer.

Best wishes. --Chris

WRF PRESENTATIONS - April 5, 2006:

  • Erica McGrath-Spangler: Coriolis force in the WRF model PDF
  • Nick Parazoo: Subgrid-scale mixing PDF
  • Russ Schumacher: Horizontal mixing in the WRF-ARW model PDF
  • David Stokowski: The WRF advection scheme PDF
  • Jih-Wang Wang: Pressure gradient force of WRF PDF




Research Group: