v:\corporate\marketing\overview.ppt crgaqs: meteorological modeling presentation to the swcaa by...

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

CRGAQS:Meteorological Modeling

Presentation to the

SWCAA

By

ENVIRON International Corporation

Alpine Geophysics, LLC

August 17, 2006


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


Today’s Presentation

– PBL/mixing heights– Cloud cover and fog on 4-km grid– Wind, temperature, RH at Wishram


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 6 @12-km better for August


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


Wind Performance, August 2004

• Hi bscat 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


UW 4km


UW 12km


Run 6 4km


Run 6 12km


Wind Performance, November 2004

• Hi bscat 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


UW 4km


UW 12km


Run 6 12km


Cloud Cover

• August 2004 notes at Wishram camera:8/10 Scattered clouds < half of sky, No layered haze8/11 No clouds, No layered haze8/12 Scattered clouds < half of sky, No layered haze8/13 No clouds, No layered haze8/14 (high) Overcast > half of sky, No layered haze8/15 Scattered clouds < half of sky, No layered haze8/16 (high thin) Overcast > half of sky, No layered haze8/17 (high thin) Overcast > half of sky, No layered haze8/18 (high thin) Overcast > half of sky, No layered haze8/19 Scattered clouds < half of sky, No layered haze8/20 (high thin) Overcast > half of sky, No layered haze8/21 (high) Overcast > half of sky, No layered haze8/22 Overcast > half of sky, No layered haze


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


Wishram Camera

August 14, noon Pristine


Run 6

Low High


UW Run 3

Low High


Cloud Cover

• November 2004 notes at Wishram camera:11/3 Scattered clouds < half of sky, No layered haze11/4 No clouds, Ground-based layered haze only11/5 (high thin) Overcast > half of sky, No layered haze (hazy)11/6 Scattered clouds < half of sky, Ground-based layered haze only11/7 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 scene11/16 Overcast > half of sky, No layered haze11/17 Scattered clouds < half of sky, No layered haze11/18 Overcast > half of sky, No layered haze


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 bscat days

– This will impact aqueous PM chemistry


Wishram Camera

November 10, noon Pristine


Run 6

Low High


UW Run 3

Low High


Wishram Camera

November 13, noon Pristine


Run 6

Low Low

UW Run 3


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


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


UW 4km Wind Speed


Run 6 4km Wind Speed


UW 4km Wind Direction


Run 6 4km Wind Direction


Wishram MeteorologyWind Speed at Wishram: August 10-22

0

5

10

15

20

25

8/10 8/11 8/12 8/13 8/14 8/15 8/16 8/17 8/18 8/19 8/20 8/21 8/22

m/s

Observed

Run 6 4-km

Run 3 4-km


Wishram MeteorologyWind Direction at Wishram: August 10-22

0

60

120

180

240

300

360

8/10 8/11 8/12 8/13 8/14 8/15 8/16 8/17 8/18 8/19 8/20 8/21 8/22

Deg

Observed

Run 6 4-km

Run 3 4-km


UW 4km Temperature


Run 6 4km Temperature


Wishram MeteorologyTemperature at Wishram: August 10-22

290

295

300

305

310

315

8/10 8/11 8/12 8/13 8/14 8/15 8/16 8/17 8/18 8/19 8/20 8/21 8/22

K

ObservedRun 6 4-kmRun 6 12-kmRun 3 4-kmRun 3 12-km


UW/Run 6 PBL Heights


UW 4km Mixing Ratio


Run 6 4km Mixing Ratio


Wishram Meteorology%RH at Wishram: August 10-22

0

10

20

30

40

50

60

70

80

90

100

8/10 8/11 8/12 8/13 8/14 8/15 8/16 8/17 8/18 8/19 8/20 8/21 8/22

%R

H

ObservedRun 6 4-kmRun 6 12-kmRun 3 4-kmRun 3 12-km


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


UW 4km Wind Speed


Run 6 4km Wind Speed


UW 4km Wind Direction


Run 6 4km Wind Direction


Wishram MeteorologyWind Speed at Wishram: November 3-18

0

3

6

9

12

15

11/3 11/4 11/5 11/6 11/7 11/8 11/9 11/10 11/11 11/12 11/13 11/14 11/15 11/16 11/17 11/18

m/s

Observed

Run 6 4-km

Run 3 4-km


Wishram MeteorologyWind Direction at Wishram: November 3-18

0

60

120

180

240

300

360

11/3 11/4 11/5 11/6 11/7 11/8 11/9 11/10 11/11 11/12 11/13 11/14 11/15 11/16 11/17 11/18

Deg

Observed

Run 6 4-km

Run 3 4-km


UW 4km Temperature


Wishram MeteorologyTemperature at Wishram: November 3-18

270

272

274

276

278

280

282

284

286

288

290

11/3 11/4 11/5 11/6 11/7 11/8 11/9 11/10 11/11 11/12 11/13 11/14 11/15 11/16 11/17 11/18

K

Observed

Run 6 4-km

Run 3 4-km


UW/Run 6 PBL Heights


UW 4km Mixing Ratio


Wishram Meteorology%RH at Wishram: November 3-18

0

10

20

30

40

50

60

70

80

90

100

11/3 11/4 11/5 11/6 11/7 11/8 11/9 11/10 11/11 11/12 11/13 11/14 11/15 11/16 11/17 11/18

%R

H

Observed Run 6 4-km

Run 3 4-km

v:\corporate\marketing\overview.ppt crgaqs: meteorological modeling presentation to the swcaa by...

Documents

layered haze slide

wishram slide

important slide

light slide

high overcast half of

days slide

wind performance

scattered clouds half