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Characterizing the Boundary-Layer During the Uintah Basin Ozone Study Erik Crosman John Horel Others: Matt Lammers, Alex Jacques, Nola Lucke, John Lawson,

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Presentation on theme: "Characterizing the Boundary-Layer During the Uintah Basin Ozone Study Erik Crosman John Horel Others: Matt Lammers, Alex Jacques, Nola Lucke, John Lawson,"— Presentation transcript:

1 Characterizing the Boundary-Layer During the Uintah Basin Ozone Study Erik Crosman John Horel Others: Matt Lammers, Alex Jacques, Nola Lucke, John Lawson, Maggie Schoonover, Erik Neemann, Joe Young University of Utah Department of Atmospheric Sciences

2 200 km 140 km 45 km 20 km UINTAH BASIN SALT LAKE ‘BASIN’ 65 km LOS ANGELES BASIN 20 km New territory: If SL Basin is a ‘tea cup’ then Uintah Basin is a ‘large kettle’ ‘Tea Cup’ Model Lareau et al. (Jan 2013 BAMS)

3 Characterizing the Boundary Layer During UBOS Boundary-layer height and vertical profiles (ceilometers, rawinsondes) Near-surface turbulence (sonic anemometer) Spatial variations in BL (WRF model simulations, MesoWest, UU2DVAR, mobile ozone and met obs) CS Sonic Anemometer Mobile Ozone/Met WRF near-surface temp (left) and terrain (right) 12 UTC Feb 13 2011 Viasala CL31 ceilometer

4 (Very) Preliminary Observations from 14- 28 January Uintah Basin Cold Air Pool Laser ceilometer profiles 1800 UTC Jan 26 Rawinsonde 25 Jan mobile ozone/met

5 Cold Air Pool Boundary-Layer Evolution Phase 1: 15-23 Jan: Persistent cold air pool in place in basin with only slight warming of boundary layer through period Phase 2: 23-28 Jan: Dramatic warming of boundary layer while temperature inversion remains intact (due to clouds and infrared radiative warming of boundary- layer, differential warming aloft, precipitation late) End of cold air pool with frontal passage on Jan 28 th Phase 1Phase 2

6 Saturday January 26 th 1800 UTC Viasala Ceilometer Backscatter (Orange/Red high backscatter) 1000 m 500 m 0 m Waves & changes in height of primary aerosol layer 26 Jan 11 am MST Rawinsonde 6 am MST 26 Jan 11 am MST 9 am MST ‘Layering’ in aerosol backscatter corresponds to distinct temperature layers in the boundary layer

7 1000 m 500 m 0 m AGL 1000 m 500 m 0 m AGL Contrasting Boundary Layers Noon-6 pm Phase 1: 19 Jan 2013. High aerosol concentrations in shallow layer with thin aerosol layers above 24 Jan 2013 Phase 2: 25 Jan 2013. Higher aerosol concentrations in deeper layer with clouds above

8 Mobile Ozone/Met Observations 25 January http://home.chpc.utah.edu/~u0732636/Mobile_Viewer/mapUBOSO3.html Mobile consistent with measurements at fixed sites Interactive display Roosevelt Vernal Horsepool Ozone (ppb) Myton nr Horsepool Vernal Roosevelt

9 UU UBOS Webpage: http://home.chpc.utah.edu/~u0198116/uintahbasin.html Ceilometers/Sonic Anemometer/Rawinsonde/mobile data available under ‘observations’

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