EGS XXVI General Assembly, Nice, France, March 2001

OA12. Developments in dynamical meteorology: - Oral Programme

Convener(s): Wernli, H.
Co-Convener(s): Fantini, M.; Malardel, S.
Co- Sponsorship:

Tuesday, 27 March 2001
Lecture Room: Uranie

Chairperson: Langland, R.H.

08:30
 JOLY, A.; ARBOGAST, PH.
The FASTEX project: some results (Solicited Paper)

09:00
 ROBERTS, N.M.
FASTEX observations of mesoscale structures in mid-latitude weather systems (Solicited Paper)

09:30
 BOUNIOL, D.; LEMAITRE, Y.; PROTAT, A.
Coupling/uncoupling processes between upper and lower ageostrophic circulation involved in FASTEX secondary cyclogeneses

09:45
 AHMADI-GIVI, F.; CRAIG, G.C.
The extreme role of latent heat release in FASTEX IOP 18

10:00
 DONNADILLE, J.; CAMMAS, J.-P.; LAMBERT, D.; MASCART, P.
Triggering of a cold air cyclogenesis

10:15
 PROTAT, A.; LEMAITRE, Y.; BOUNIOL, D.
Momentum, heat and water budget within secondary cyclones sampled during fastex (IOPs 11, 12, 16, 17).

10:30
 BREAK
Chairperson: Hewson, T.D.

11:00
 FOURRIE, N.; DOERENCECHER, A.
Sensitivity of forecasts to TOVS observations

11:15
 JUCKES, M.
A relaxed approach to data assimilation

11:30
 HAMILL, T.; SNYDER, C.
Adaptive Observations using an Ensemble Kalman Filter

11:45
 PELLY, J.L.; HOSKINS, B.J.
The predictability of block onset: a case study using the ECMWF EPS and PV-theta diagnostics

12:00
 SZUNYOGH, I.; TOTH, Z.
Targeting observations in a storm track environment

12:15
 TOTH, Z.; SZUNYOGH, I.; BISHOP, C.; MAJUMDAR, S.; MORSS, R.; MOSKAITIS, J.; LORD, S.
Targeted observations in operational numerical weather forecasting

12:30
 LANGLAND, R.; SHAPIRO, M.; GALL, R.
Plans for The Hemispheric Observing System Research and Predictability Experiment (THORPEX)

12:45
 SHAPIRO, M.A.; LANGLAND, R.; GELARO, R.; ZHANG, F.
A Planetary-Scale to Mesoscale Perspective of Predictability in the Forecast of the January 2000 East Coast Snowstorm

13:00
 LUNCH
Chairperson: Malardel, S.

14:00
 CARON, J.-F.; ZWACK, P.; PAGE, C.
Diagnostic studies of 1999-2000 European wind storms as simulated by the Canadian global forecast model

14:15
 WERNLI, H.; DIRREN, S.; LINIGER, M.; ZILLIG, M.
Dynamical aspects of the life-cycle of the winter storm ``Lothar'' (24-26 December 1999)

14:30
 HELLO, G.; ARBOGAST, P.
Two different methods to correct the initial conditions, potential vorticity modifications and perturbations with sensitivities: an application to the second 1999 storm over south of FRANCE.

14:45
 ROSTING, B.; KRISTJANSSON, J.E.; SUNDE, J.
Can modification of the potential vorticity field in the numerical analysis improve the model simulation?

15:00
 Hewson, T.D.
The Storm of 30th October 2000

15:15
 ADAMSON, D.
Frictional generation of PV in mid-latitude cyclones

15:30
 DIRREN, S.; DAVIES, H.C.
Localized anomalies, Rossby wave-guides and baroclinic instability

15:45
 DAVOLIO, S.; FANTINI, M.
Instability of neutral Eady wave and orography

16:00
 BREAK
Chairperson: Wernli, H.

16:30
 HEIFETZ, E.; FARRELL, B.F.
Generalized Stability of Non--Geostrophic Baroclinic Shear Flow in a Large Richardson Number Regime

16:45
 CHABOUREAU, J.-P.; CLAUD, C.; CAMMAS, J.-P.; MASCART, P.
Large-scale cloud, precipitation and upper-level features during FASTEX as inferred from TOVS observations

17:00
 GRAY, S.L.
Cross-tropopause transport in tropopause folds: mechanisms and resolution sensitivity in a mesoscale model case analysis

17:15
 HELTEN, M.; SMIT, H.G.J.; STRÄTER, W.; KLEY, D.
MOZAIC: Validation of water vapor measurements for atmospheric research

17:30
 DABAS, A.; REITEBUCH, O.; DROBINSKI, P.; RICHARD, E.; VOLKERT, H.; DELVILLE, P.; FLAMANT, P.; WERNER, C.
Airborne Doppler lidar observations of the dynamics in the vicinity of a high altitude jet.

17:45
 PETERS, D.; HOFFMANN P.; ALPERS M.
Appearance of inertio-gravity waves by poleward Rossby wave breaking events in winter 1999/2000

18:00
 MAENNIK, A.; ROOM, R.
Forecasting experiments with acoustically filtered non-hydrostatic pressure-coordinate model

18:15
 END OF PART I

Wednesday, 28 March 2001
Lecture Room: Uranie

Chairperson: Fantini, M.

08:30
 GRUBISIC, V.
Orographic Generation of Potential Vorticity (Solicited Paper)

09:00
 SPRENGER, M.; SCHAER, C.; LUETHI, D.; BENOIT, R.
Alpine PV banners and generalized Bernoulli theorem for IOP4 of MAP SOP

09:15
 FLAMANT, C.; DROBINSKI, P.; NANCE, L.; BANTA, R.; DARBY, L.; HARDESTY, M.; DUSEK, J.; PELON, J.
Gap Flow in an Alpine Valley during a Shallow South Foehn Event: Observations and Hydraulic Analog

09:30
 FURGER, M.; BAUMANN, K.; DROBINSKI, PH.; HAEBERLI, CHR.; NEININGER, B.; VOGT, S.
Vertical velocity measurements during the foehn of 24 October 1999 in the Rhine Valley

09:45
 DROBINSKI, P.; RICHARD, E.; HAEBERLI, C.; DABAS, A.M.; FLAMANT, P.H.; DELAVAL, A.; AUPIERRE, M.; DELVILLE, P.; C, C.BOITEL; DONIER, J.M.; ROMAND, B.; LOTH, C.
Observation and Mesoscale Numerical Modeling of the Time Evolution of Flow Splitting in the Rhine Valley During IOP 12 of the Map Special Observing Period