The Extratropical UTLS:Observations, Concepts and Future Directions

Community Workshop in BoulderOctober 19-22, 2009

Organizing Committee

Bill Randel, Laura Pan, Andrew Gettelman (NCAR)Ken Bowman (Texas A&M)Peter Hoor (MPI-Mainz)Valerie Thouret (CNRS, Lab d’Aerologie, Toulouse)

Background / objectives for this workshop:

• Synthesize key observations from aircraft, satellites, ....

- research aircraft: START08, SPURT, NASA, others- in-service aircraft: MOZAIC, CARIBIC, CONTRAIL- many satellite and ground-based data sets

• Current state of UTLS modeling (process, regional and global models)

• Highlight key uncertainties in understanding

• Identify specific future research needs (observations and models)

•Workshop attended by ~90 people.

Sampling from research aircraft

Also in-service aircraft: CARIBIC (170 flights), MOZAIC (>32,000 flights!)

Program: Overview talks, contributed talks and postersDynamical structure CCMval overview by Hegglin/Gettelman Tropopause Inversion Layer, Double TropopausesChemical structure overview by Hoor/Pan tropopause definitions, coordinates for placing parametersTransport and STE overview by Haynes START08, HIPPOChemistry and microphysics CARIBIC overview by Zahn; CONTRAIL measurements modeling – whole atmosphere models, high vertical resolution, high horizontal resolution models satellite – TES, CALIPSO, ….

Program (cont’d): Overview talks, contributed talks and postersLong-term variability MOZAIC overview by Thouret tropical broadening, tropopause rising Asian monsoonFuture missions DC3, PREMIER, MACPEX, PACE, HALO proposed projects

• Rapporteur groups led follow-on discussions for each session.

• Plans for SPARC Newsletter article, perhaps IGACtivities article, and likely a summary white paper.

Boulder UTLS Workshop October 2009