POST Physics of Stratocumulus Top Introduction Hermann Gerber
POST (Physics of Stratocumulus Top) Introduction Hermann Gerber, P. I. GCSS/CFMIP Meeting, 7 -12 June, 2009 UBC, Vancouver, Canada
PARTICIPANTS University of Warsaw Gerber Scientific University of Utah University of Washington Colorado State University of California, UCSC University of California, UCI Desert Research Institute NPGS NCAR CIRPAS NRL Szymon Malinowski, Wojciech Kumula, Krysztof Haman Hermann Gerber Steven Krueger, Samantha Hill Rob Wood Takanobu Yamaguchi Patrick Chuang, Dione Lee Rossiter Djamal Kheli, Carl Friehe Jim Hudson Qing Wang Stuart Beaton, Wojciech Grabowski Haflidi Jonsson, Roy Woods, Jesus Galvan Arunas Kuciauskas, Shouping Wang, Anthony Bucholtz SPONSORS National Science Foundation Office of Naval Research
(Stevens et al. , B. A. M. S. , 2003, 38) POST Monterey DYCOMS II
ENTRAINMENT VELOCITY vs BUOYANCY JUMP
1000 -hz PVM and UFT Data DYCOMS II POST
Issues What are the properties and role of the EIL (Entrainment Interface Layer)? Is isothermal entrainment of conditioned EIL air the rule? How important is CTEI? Are details of processes at Sc top necessary for accurate we estimates, or do knowledge of surface fluxes, interface jumps, and radiation suffice? Can existing parameterizations of we be improved? Does Sc modeling from microphysical- to meso-scales compare favorably with POST observations? Approach High-resolution Lagrangian aircraft measurements in unbroken Sc
CIRPAS TWIN OTTER
INSTRUMENTATION on T. O. NOSE L-alpha (40 hz) Lycor, UCI Gust Probe (40 hz) ~60 cm 14 cm (100 hz) L-alpha NCAR L-alpha UCI (40 hz) 38. 1 cm 21. 6 cm 8. 9 cm 55. 9 cm PVM (1000 hz) 45. 7 cm UFT (1000 hz)
http: //www. eol. ucar. edu/projects/post/
POST FLIGHTS: July 16 – Aug. 15, 2008 17 flights (~5 hr. each) 8 night-time flights 9 day-time flights 15 Lagrangian flights
Twin Otter Vertical Flight Track FLIGHT TO 10 Sc Top Sc base 20 km
POST Web Page: http: //www. eol. ucar. edu/projects/post Suggested POST Web Page Browsing: POST Field Catalog, Science Team Meeting (5 -6 Feb, 2009), Initial Analysis by Qing Wang at Meeting
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