Mountain meteorology research using the TODWL

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Presentation transcript:

Mountain meteorology research using the TODWL D. Emmitt (SWA) S. de Welkker (UVA) and K. Godwin (KG,LLC) 16 -18 October 2012 WG meeting in Boulder, CO

CIRPAS Twin Otter at MATERHORN ARO (Videen) funding ferry flights from Monterey and 10 hours on site. Support MATERHORN IOPs Provide 3D context for complex terrain flow ONR(Ferek) allowing 10 -15 UPP flight hours to be used at GMAST. Pursue UPP objectives with evaluation of EDMF parameterization over land in the presence of organized structures; nocturnal flows

TODWL

CIRPAS Twin Otter Aerosols (probes) Fluxes Surface temperature Wind profiles Aerosol profiles

Flight profile Aircraft is based out of U42 (current plan) ~ 30 minute to Granite Mountain climb to 12K feet (~5K feet above peaks) Twin Otter in Utah between 5 October and 18 October Missions last~ 4 hours 7 missions 12 hour rules for pilots apply 12 hours on call 12 hours between “on calls”.

RADD for Twin Otter

From DeWekker, et.al 2012

Easterly Leg 3 Easterly Leg 2 Easterly Leg 1

TODWL data products Downward conical scans (12 point step stare) Off-nadir angle of 20 degrees 20 -25 seconds for full 360 scan ( ~ 1 -1.2km) U,V,W with 50 m vertical resolution Sigma (U,V) ~ .10 m/s ; Sigma (W) ~ ?? SNR (aerosols) Nadir samples 5 seconds between conical scans 50 m vertical resolution with sigma(w) ~ .10m/s` Structure prospecting Straight ahead and down 3 -6 degrees

Data to date 4 hours of nadir profiles between Monterey and SLC from 12 -14k feet. Excellent triple pass over Ruby Mt with 50m/s winds aloft and significant lee waves. Great case study for validating WRF model. Rawinsonde support from Elko. 5 flights over Granite Mountain with several hours flown at differing heights in the BL to measure fluxes with TODWL providing the context.

Ruby Mountains (waves) Granite Mtn

Summary Weather patterns provided several different flow patterns over study area (Dugway Proving Grounds) TODWL performed well Other data provided by UAVs, tethered balloon, ground-based DWLs, instrumented towers, rawinsondes and smoke releases. TODWL data will support model (WRF/NCAR and WRF/Pu) validation and development.