From lydia at ucar.edu Wed Feb 1 15:54:10 2006 From: lydia at ucar.edu (Lydia Shiver) Date: Wed Feb 1 15:54:12 2006 Subject: [CCSM-AMWG] CCSM Atmos. Model WG Information Message-ID: <43E13C12.3050609@ucar.edu> Hello to members of the AMWG! I hope that most of you have noticed that we have firm dates for our Annual AMWG meeting. It will be March 20th-22nd, and will overlap with the new Chemistry-Climate working group (ChemWG) meeting that will be held on March 22nd-24th. Our plan is to have between a half and full day of overlap and joint sessions with the ChemWG. We currently envisage spending those session discussing current progress and near term prospects for changing the cloud microphysical and aerosol formulations in CAM. We hope that you will plan to attend this joint session, and we will make sure that you are notified of the agenda for ChemWG as well, when it is ready. This email is to solicit suggestions for agenda items for the non-overlapping components of the AMWG meeting. Historically, this meeting is the opportunity for individuals to present their work in some detail to other members of the AMWG through brief 15 minute talks. We anticipate this occuring again at the meeting. We are also interested in some broader more over-arching issues. Some of the topics that might merit discussion are: 1) the future of alternate dynamical cores in CAM 2) suggestions on alternate cloud fraction parameterizations for CAM and means to evaluate their performance 3) progress on improving the transient variability of CAM (ENSO, diurnal variation, etc.) 4) current status of the development versions of CAM. Presentation of the deadlines and schedules required to produce the next generation of CAM. Requests for suggestions from the audience on how to make progress more rapidly and equitably in developing the next generation CAM. 5) the use of short term climate drifts and forecasts as a tool in guiding the development of CAM. These are just topics that come to my (PJR's) mind. I welcome your suggestions on topics, or on ways that we might organize the meeting to make it as productive and enjoyable as possible. Please send me your suggestions. I will send out a call for abstracts for talks/posters separately in the next week or so. Please do not send them to me yet informally. I am liable to lose them! Best Regards Phil Rasch From lydia at ucar.edu Mon Feb 13 16:06:51 2006 From: lydia at ucar.edu (Lydia Shiver) Date: Mon Feb 13 16:06:55 2006 Subject: [CCSM-AMWG] Update on AMWG Agenda and Call for Titles and Abstracts Message-ID: <43F1110B.6070307@ucar.edu> Hi to all of the AMWG and friends (This message is from Phil Rasch): Following my last email, I received a few suggestions on other topics that we should be considering. Here is an updated list: 1) The future of alternate dynamical cores in CAM. 2) Suggestions on alternate cloud fraction parameterizations for CAM and means to evaluate their performance. 3) Updates on progress of improving the transient variability of CAM (ENSO, diurnal variation, etc.). 4) Current status of the development versions of CAM, presentation of the deadlines and schedules required to produce the next generation of CAM, requests for suggestions from the audience on how to make progress more rapidly and equitably in developing the next generation CAM. 5) The use of short term climate drifts and forecasts as a tool in guiding the development of CAM. 6) Update on reducing precipitation biases. 7) Update on boundary layer processes. -------- Leo Donner and I think that these are all important and relevant topics. There were no suggestions for drastic revisions to the meeting organization or themes. It is time now to invite you to submit titles and abstracts for presentations to the meeting. Your presentations can be from one of these or on any other topic that you think is of relevance and interest to the AMWG community. Please send a title and abstract to Christina Book (cbook@ucar.edu ) with a Subject Line that includes "Abstract for AMWG Meeting." ***DEADLINE FOR ABSTRACTS: 9AM Mountain Standard Time, February 27th*** If we get a lot of submissions, Leo and I will assign topics to Oral and Poster Sessions. We will notify you by March 6th. As I indicated in the earlier message, the 3rd day of the meeting (Wednesday, March 22) will be held jointly with the Chemistry Climate Working Group. Because it is a joint session, the topics are more tightly constrained. Here is our current schedule for that day: Day 3 (March 22) Short Introduction *Microphysics Session (1[?] hour) -Summary of the Microphysics workshop -Progress -Miscellaneous Issues 1. radiation 2. convection *Scavenging Session (1 hour) -How do we represent scavenging in light of the microphysics/convection parameterizations? *Aerosol Session (2[?] hours) -Presentations (developmental vs scientific?) -Discussion Presentation of White Paper Indirect effect in light of microphysics schemes Simple vs complex schemes Chemistry and oxidants - representation of SOAs and Ammonia-nitrate - internal vs externally mixed -Plan Proposed experiments.... * Other issues (1 hour) - Chemical diagnostics - Boundary layer venting - Convection - Cooperative projects between the working groups Regards, Phil Rasch From lydia at ucar.edu Fri Feb 24 16:37:36 2006 From: lydia at ucar.edu (Lydia Shiver) Date: Fri Feb 24 16:37:41 2006 Subject: [CCSM-AMWG] CCSM AMWG and ChemWG Meetings Message-ID: <43FF98C0.7030807@ucar.edu> Hello everyone, The planning for the CCSM Atmosphere Model WG (AMWG) and the Chemistry-Climate WG (ChemWG) meetings are in progress. Attached is a draft ChemWG agenda, and we hope to send a draft AMWG agenda next week. The meetings are scheduled at NCAR's Mesa Lab. We will start the AMWG meeting in the Main Seminar Room. Attached also is a list of Boulder hotels, so that you can make your own reservations. If you are attending the AMWG and/or ChemWG and have not let us know yet, please email Christina Book at cbook@ucar.edu. If you have further questions, please contact Christina. Thanks, Lydia Shiver -------------- next part -------------- A non-text attachment was scrubbed... Name: chemwgagenda.mar06.v1.doc Type: application/msword Size: 35840 bytes Desc: not available Url : http://www.cgd.ucar.edu/pipermail/ccsm-amwg/attachments/20060224/debb3eeb/chemwgagenda.mar06.v1-0001.doc -------------- next part -------------- A non-text attachment was scrubbed... Name: Boulder Hotels with Special Rates for NCAR Visitors.pdf Type: application/pdf Size: 22110 bytes Desc: not available Url : http://www.cgd.ucar.edu/pipermail/ccsm-amwg/attachments/20060224/debb3eeb/BoulderHotelswithSpecialRatesforNCARVisitors-0001.pdf From cbook at ucar.edu Mon Feb 27 15:12:27 2006 From: cbook at ucar.edu (Christina Book) Date: Mon Feb 27 15:28:16 2006 Subject: [CCSM-AMWG] AMWG abstract deadline extended! Message-ID: <4403794B.8080700@ucar.edu> Dear AMWG subscribers, The response to the previous request for abstracts for presentations and notification of attendance to the upcoming AMWG meeting has been light, so we?re extending the deadline for another week (new deadline is 6 March 2006). Please send notice (cbook@ucar.edu ) as soon as possible of your intention to attend as well as possibly give a presentation. If you do offer to make a presentation, please send an abstract of your proposed talk. Thank you, Phil Rasch and Leo Donner, AMWG Co-chairs From trenbert at ucar.edu Mon Feb 27 15:46:33 2006 From: trenbert at ucar.edu (Kevin Trenberth) Date: Mon Feb 27 16:06:58 2006 Subject: [CCSM-AMWG] CAM3 Q and T correlations In-Reply-To: References: Message-ID: <44038149.1040702@ucar.edu> Seems like it is expected, See attached for this. Kevin Trenberth Hui Liu wrote: >Hello: > >I got a question about the T and Q correlation in CAM3 ensemble >simulations(T42). It is greatly appreciated if someone could help. >Recently, I did an 20 member ensemble 6-hour simulation run of CAM3 T42 >for first 7 days of January. The ensemble difference relative to its >mean of temprature and specific humidity shows a clear positive >correlation in high and moddle latitudes and NEGATIVE correlation >in the tropics. I am not sure what is exact reasons for this. > >Could this has to do with setting saturation mixing ratios given the >temperature for middle and high latitudes and the importance of >convection in setting the temperature profile in the tropics? >Any ideas about this is appreciated. > >Thanks. > >hui > 24575,1 99% > > > >------------------------------------------------- >NCAR/DAReS, P.O. Box 3000, Boulder, CO 80307 >Tel: (303)497-1304(o), (303)772-3873(h) >hliu@ucar.edu, http://www.image.ucar.edu/DAReS >------------------------------------------------- >_______________________________________________ >CCSM-AMWG mailing list >CCSM-AMWG@cgd.ucar.edu >http://www.cgd.ucar.edu/mailman/listinfo/ccsm-amwg > > -- **************** Kevin E. Trenberth e-mail: trenbert@ucar.edu Climate Analysis Section, NCAR www.cgd.ucar.edu/cas/ P. O. Box 3000, (303) 497 1318 Boulder, CO 80307 (303) 497 1333 (fax) Street address: 1850 Table Mesa Drive, Boulder, CO 80303 -------------- next part -------------- A non-text attachment was scrubbed... Name: T-SheaGRL2005.pdf Type: application/pdf Size: 1063913 bytes Desc: not available Url : http://www.cgd.ucar.edu/pipermail/ccsm-amwg/attachments/20060227/434eb494/T-SheaGRL2005-0001.pdf From adai at ucar.edu Mon Feb 27 16:22:41 2006 From: adai at ucar.edu (Aiguo Dai) Date: Mon Feb 27 16:33:55 2006 Subject: [CCSM-AMWG] CAM3 Q and T correlations In-Reply-To: <44038149.1040702@ucar.edu> References: <44038149.1040702@ucar.edu> Message-ID: <440389C1.8010203@ucar.edu> Hi Hui Liu, In surface observations, q and T are positively correlated over most of the globe except some very dry areas, see Fig. 18 in the following paper. The model may behave differently, however. Aiguo *Dai, A.*, 2005: *Recent climatology, variability and trends in global surface humidity*. /J. Climate/, in press. (Paper ) Aiguo Dai, Scientist Email: adai@ucar.edu Climate & Global Dynamics Division Phone: 303-497-1357 National Center for Atmospheric Research Fax : 303-497-1333 P.O. Box 3000, Boulder, CO 80307, USA www.cgd.ucar.edu/cas/adai/ Street Address: 1850 Table Mesa Drive, Boulder, CO 80305, USA Kevin Trenberth wrote: > Seems like it is expected, See attached for this. > Kevin Trenberth > > Hui Liu wrote: > >> Hello: >> >> I got a question about the T and Q correlation in CAM3 ensemble >> simulations(T42). It is greatly appreciated if someone could help. >> Recently, I did an 20 member ensemble 6-hour simulation run of CAM3 T42 >> for first 7 days of January. The ensemble difference relative to its >> mean of temprature and specific humidity shows a clear positive >> correlation in high and moddle latitudes and NEGATIVE correlation >> in the tropics. I am not sure what is exact reasons for this. >> >> Could this has to do with setting saturation mixing ratios given the >> temperature for middle and high latitudes and the importance of >> convection in setting the temperature profile in the tropics? >> Any ideas about this is appreciated. >> >> Thanks. >> >> hui >> >> 24575,1 99% >> >> >> >> ------------------------------------------------- >> NCAR/DAReS, P.O. Box 3000, Boulder, CO 80307 >> Tel: (303)497-1304(o), (303)772-3873(h) >> hliu@ucar.edu, http://www.image.ucar.edu/DAReS >> ------------------------------------------------- >> _______________________________________________ >> CCSM-AMWG mailing list >> CCSM-AMWG@cgd.ucar.edu >> http://www.cgd.ucar.edu/mailman/listinfo/ccsm-amwg >> >> > >------------------------------------------------------------------------ > >_______________________________________________ >CCSM-AMWG mailing list >CCSM-AMWG@cgd.ucar.edu >http://www.cgd.ucar.edu/mailman/listinfo/ccsm-amwg >