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ANNOUNCEMENT

We invite you to participate in a workshop at NCAR on June 7 and 8, 2004, to discuss the current status and the outlook for future progress in the area of ice initiation in clouds. Future work will include field programs, laboratory experiments, and modeling. This workshop will be held at the National Center for Atmospheric Research's Foothills campus, in the Building 2 Auditorium (see map on Travel page).

The goals of this workshop are to review current knowledge in this area and to develop two or three experiments that can make meaningful progress on the ice initiation problem. This information will form the basis for a Scientific Overview Document (SOD). This SOD will describe one or more field programs and supporting laboratory and modeling studies to illuminate ice production processes. The SOD will be submitted to the National Science
Foundation in the September 2004 timeframe, which is necessary to access major facilities and which will be available to assist investigators who are preparing proposals to the NSF. We also hope that NASA and the international scientific community can use this SOD to support collaborative participation.

The agenda appears below. We have allocated most of the first afternoon for presentations from participants on their views of where progress can be made. If you are interested in presenting your ideas in 10 or 15 minutes, please let us know via email, or using the registration form link at your left.

We solicit from you the names of any additional workshop attendees that have not been included in this mailing.

Andy Heymsfield, Jeff Stith, and Dave Rogers, NCAR


Printable PDF version of agenda (updated June 3, 2004)

AGENDA (updated June 3) (top)

ICE INITIATION WORKSHOP, June 7 and 8, 2004

WHERE: NCAR Foothills Laboratory Bldg. 2, Auditorium (see map)

Monday 7 June

8:00 - 8:30 am

Registration and Continental Breakfast in Cafeteria Atrium

8:30 - 8:40 am

Welcome (Killeen/Winter)

8:40 - 8:50 am

Workshop Goals (Heymsfield)

Overview of Ice Nucleation

8:50 - 9:30 am

Ice observations in the atmosphere, 1949 - 2004 (Vali)

9:30 - 10:00 am

Laboratory results and future needs (DeMott)

10:00 - 10:15 am

BREAK (room 1002)

10:15 - 10:45 am

Ice formation processes in cloud-scale to global scale models and current needs (Cotton)

10:45 - 11:15 am

European Studies (Kaercher)

11:15 - 12:15 pm

Mixed-phase clouds (Isaac/Hallett)

12:15 - 1:30 pm

LUNCH (on your own)

Proposed Field Experiments

1:30 - 2:00 pm

Wave/Layer Clouds (Rogers)

2:00 - 2:30 pm

Convection (Stith)

Position Papers by Attendees (10 - 15 minute presentations by participants)

2:30 pm

Tinsley, "Contact ice nucleation near cloud tops due to electroscavenging"

2:40 pm

Liu, "A model look at heterogeneous ice nucleation on mineral dust

2:50 pm

Gultepe, "Ice crystal number concentration versus temperature relationships and models"

3:00 pm

Tsemekhman, "Toward understanding of homogeneous nucleation of ice"

3:10 - 3:30 pm

BREAK (room 1002)

3:30 pm

Jensen, "Large ice supersaturations measured in the tropical tropopause region"

3:40 pm

Sherwood, "Satellite retrievals relevant to cloud glaciation and electrification

3:50 pm

Mayor, "Eye-safe depolarization lidar at 1/54 microns"

4:00 pm

Knight, "The use of radar in studying the first formation of precipitation in cumulus"

4:10 pm

Blyth, "UK Field campaign to study the initiation and development of ice in cumulus clouds"

4:20 pm

Lawson, "Ice formation and development in wave clouds"

4:30 pm

Woodley, "On the initiation and growth of ice in Argentine hailstorms"

4:40 - 5:00 pm

Other speakers as time allows
   

Tuesday 8 June

8:00 - 8:30 am

Continental breakfast in room 1002 (FL building 2)

8:30 - 9:00 am

NSF perspective - future field programs (Cooper)

9:00 - 9:30 am

DOE perspective - future field programs (Ackerman)

Presentations by participants (cont.)

9:30 am

Cziczo, "Single particle studies of atmospheric ice formation"

9:40 am

Sassen, "Arctic aerosol layers and ice nucleation"

9:50 am

Other speakers as time allows

10:00 - 10:20 am

BREAK (room 1002)

10:20 am

Korolev, "Lifetime of mixed phase clouds (theoretical consideration)"

10:30 am

Cantrell, "Ice nucleation by long chain alcohols"

10:40 am

Shaw, "Aspects of heterogeneous nucleation from laboratory studies"

10:50 am

Bailey, "The habit transition at -40 C and its effect on in situ observations"

11:00 am

Magee, "Ice crystal growth in a quadrupole levitation wind tunnel"

11:15 - 11:30 pm

Charge to break-out sessions (Heymsfield):

  1. Develop scientific plans for SOD
  2. Identify contributors to SOD
  3. What kind of lab/model/field programs are posssible and most productive?
  4. List likely participants and resources
  5. Draft Outline for each sub-group (lab/modeling/field)
  6. Other (field locations, synergy with international programs, w..)?

11:30 - 1:00 pm

LUNCH (on your own)

1:00 - 3:15 pm

Break-out session groups to include:

  • Lab Experiments (Rogers/Moehler) - Room 1003, FL2
  • Modeling (Jensen/Seifert) - Room 1002, FL2
  • Field studies (Stith/Vali) - Room 1001, FL2

3:15 - 3:30 pm

BREAK (outside room 1002)

3:30 - 5:00 pm

Plenary (Heymsfield)

  • Working group reports (15 minutes each)
  • Draft outline for SOD
  • Schedule
  • Next steps

END OF WORKSHOP