V:\corporate\marketing\overview.ppt CRGAQS: Meteorological Modeling Presentation to the SWCAA By ENVIRON International Corporation Alpine Geophysics, LLC.

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Presentation transcript:

V:\corporate\marketing\overview.ppt CRGAQS: Meteorological Modeling Presentation to the SWCAA By ENVIRON International Corporation Alpine Geophysics, LLC August 17, 2006

V:\corporate\marketing\overview.ppt Today’s Presentation Further additional evaluation of MM5 performance –Compare 4/12-km results –Compare Final (Run 6) against UW (Run 3) Analyses conducted for: –4-km surface wind fields in Gorge area –Wind, temperature, humidity time series at west, central, east sites

V:\corporate\marketing\overview.ppt Today’s Presentation –PBL/mixing heights –Cloud cover and fog on 4-km grid –Wind, temperature, RH at Wishram

V:\corporate\marketing\overview.ppt Conclusions Winds similar among: –4-km and 12-km grids –Final Run 6 and UW Run 3 Possible slight edge to Run 6 4-km winds due to observation nudging Temperature/humidity: –UW Run 3 better for November –Final Run better for August

V:\corporate\marketing\overview.ppt Conclusions Clouds/fog: –Unimportant for August episode –Very important for November episode UW Run 3 generates more low clouds/flog But less high large-scale cloudiness Recommendation: –Use Final Run 6 12-km for August –Use UW Run 3 4-km for November

V:\corporate\marketing\overview.ppt Wind Performance, August 2004 Hi b scat 8/10-8/16, 8/19 Similar performance, both runs, both grids –Poor performance at central sites 8/10- 8/13 Wind opposite direction –Good performance 8/14-8/22 Maybe too light on some days

V:\corporate\marketing\overview.ppt UW 4km

V:\corporate\marketing\overview.ppt UW 12km

V:\corporate\marketing\overview.ppt Run 6 4km

V:\corporate\marketing\overview.ppt Run 6 12km

V:\corporate\marketing\overview.ppt Wind Performance, November 2004 Hi b scat 11/8-11/13 Similar performance, both runs, both grids –Final Run 6 a bit better (nudging?) –Overall better performance than for August episode –Very good performance over 11/8-11/13 Some stagnation leads to wind direction errors Some windy periods are too light

V:\corporate\marketing\overview.ppt UW 4km

V:\corporate\marketing\overview.ppt UW 12km

V:\corporate\marketing\overview.ppt Run 6 12km

V:\corporate\marketing\overview.ppt Run 6 12km

V:\corporate\marketing\overview.ppt Cloud Cover August 2004 notes at Wishram camera: 8/10 Scattered clouds < half of sky, No layered haze 8/11 No clouds, No layered haze 8/12 Scattered clouds < half of sky, No layered haze 8/13 No clouds, No layered haze 8/14 (high) Overcast > half of sky, No layered haze 8/15 Scattered clouds < half of sky, No layered haze 8/16 (high thin) Overcast > half of sky, No layered haze 8/17 (high thin) Overcast > half of sky, No layered haze 8/18 (high thin) Overcast > half of sky, No layered haze 8/19 Scattered clouds < half of sky, No layered haze 8/20 (high thin) Overcast > half of sky, No layered haze 8/21 (high) Overcast > half of sky, No layered haze 8/22 Overcast > half of sky, No layered haze

V:\corporate\marketing\overview.ppt August 2004 Cloud Cover Performance appears adequate –MM5 cannot replicate high thin/wispy cirrus –MM5 usually underperforms for scattered small-scale afternoon cumulus –These should not play significant role in regional PM chemistry –Choice of MM5 not important

V:\corporate\marketing\overview.ppt Wishram Camera August 14, noonPristine

V:\corporate\marketing\overview.ppt Run 6 LowHigh

V:\corporate\marketing\overview.ppt UW Run 3 LowHigh

V:\corporate\marketing\overview.ppt Cloud Cover November 2004 notes at Wishram camera: 11/3 Scattered clouds < half of sky, No layered haze 11/4 No clouds, Ground-based layered haze only 11/5 (high thin) Overcast > half of sky, No layered haze (hazy) 11/6 Scattered clouds < half of sky, Ground-based layered haze only 11/7 Overcast > half of sky, No layered haze (hazy) 11/8 Overcast > half of sky, Weather concealing scene (thick haze) 11/9 Overcast > half of sky, Weather concealing scene (thick haze) 11/10 Overcast > half of sky, Weather concealing scene (fog) 11/11 Overcast > half of sky, Weather concealing scene (thick haze) 11/12 Overcast > half of sky, Weather concealing scene (fog) 11/13 Overcast > half of sky, Weather concealing scene (thick haze) 11/14 Overcast > half of sky, Weather concealing scene (distant fog) 11/15 Overcast > half of sky, Weather concealing scene 11/16 Overcast > half of sky, No layered haze 11/17 Scattered clouds < half of sky, No layered haze 11/18 Overcast > half of sky, No layered haze

V:\corporate\marketing\overview.ppt November 2004 Cloud Cover Large-scale higher clouds appear well simulated –Run 6 makes more large-scale (higher) cloudiness Low-level cloud/fog events are not –Run 3 makes more low-level (foggy) clouds –Especially on the high b scat days –This will impact aqueous PM chemistry

V:\corporate\marketing\overview.ppt Wishram Camera November 10, noonPristine

V:\corporate\marketing\overview.ppt Run 6 LowHigh

V:\corporate\marketing\overview.ppt UW Run 3 LowHigh

V:\corporate\marketing\overview.ppt Wishram Camera November 13, noonPristine

V:\corporate\marketing\overview.ppt Run 6 Low UW Run 3

V:\corporate\marketing\overview.ppt August 2004 Meteorology Wind speed/direction well simulated –Both grids, both MM5 configurations Run 6 4-km temperatures are highly suspect –Run 6 12-km is better But min temps too warm during haze period Better characterization of afternoon mixing? –Run 3 4- & 12-km are better But too cool during haze period

V:\corporate\marketing\overview.ppt August 2004 Meteorology Run 6 4-km humidity too wet –Run 6 12-km humidity better But not high enough in early morning (related to high min temps) –Run 3 4- & 12-km humidity better But not high enough in early morning Overall Run 6 12-km met looks best

V:\corporate\marketing\overview.ppt UW 4km Wind Speed

V:\corporate\marketing\overview.ppt Run 6 4km Wind Speed

V:\corporate\marketing\overview.ppt UW 4km Wind Direction

V:\corporate\marketing\overview.ppt Run 6 4km Wind Direction

V:\corporate\marketing\overview.ppt Wishram Meteorology

V:\corporate\marketing\overview.ppt Wishram Meteorology

V:\corporate\marketing\overview.ppt UW 4km Temperature

V:\corporate\marketing\overview.ppt Run 6 4km Temperature

V:\corporate\marketing\overview.ppt Run 6 12km Temperature

V:\corporate\marketing\overview.ppt Wishram Meteorology

V:\corporate\marketing\overview.ppt UW/Run 6 PBL Heights

V:\corporate\marketing\overview.ppt UW 4km Mixing Ratio

V:\corporate\marketing\overview.ppt Run 6 4km Mixing Ratio

V:\corporate\marketing\overview.ppt Run 6 12km Mixing Ratio

V:\corporate\marketing\overview.ppt Wishram Meteorology

V:\corporate\marketing\overview.ppt November 2004 Meteorology Wind speed/direction performance appears acceptable –Both grids, both simulations –Run 6 perhaps a bit better (nudging) Run 6 4-km temperature performance is poor –Run 6 12-km better –Run 3 4-km much better Run 6 4-km humidity is too low – no fog –Run 6 12-km better –Run 3 4-km much better Overall Run 3 4-km looks best

V:\corporate\marketing\overview.ppt UW 4km Wind Speed

V:\corporate\marketing\overview.ppt Run 6 4km Wind Speed

V:\corporate\marketing\overview.ppt UW 4km Wind Direction

V:\corporate\marketing\overview.ppt Run 6 4km Wind Direction

V:\corporate\marketing\overview.ppt Wishram Meteorology

V:\corporate\marketing\overview.ppt Wishram Meteorology

V:\corporate\marketing\overview.ppt UW 4km Temperature

V:\corporate\marketing\overview.ppt Run 6 4km Temperature

V:\corporate\marketing\overview.ppt Run 6 12km Temperature

V:\corporate\marketing\overview.ppt Wishram Meteorology

V:\corporate\marketing\overview.ppt UW/Run 6 PBL Heights

V:\corporate\marketing\overview.ppt UW 4km Mixing Ratio

V:\corporate\marketing\overview.ppt Run 6 4km Mixing Ratio

V:\corporate\marketing\overview.ppt Run 6 12km Mixing Ratio

V:\corporate\marketing\overview.ppt Wishram Meteorology