2010/04/27 data 1

2 MPR data, Courtesy of Dr. Kevin Knupp

3 Cloud No data

4 Note this high Almost cutoff low

NAM RH, pressure-time cross section above HSV 5 lat:34.73, long: Z 4/26 ~ 00Z 4/30, hpa Note the starting time

NAM wind speed above HSV 6 The direction of the axis is north-south. 60m/s=216km/hour Subtropical jet

Nov. 4, 2010 case 7

8 11/3 11/611/5 11/4

9

10

1. Comparison of the CMAQ ozone simulation and the lidar measurement for a STE event Lidar O3 CMAQ O3 Sonde The CMAQ model is able to capture most of the tropospheric ozone variability caused by this STE event [manuscript in prep., Arastoo et al.] and simulates extremely well the subsiding tongue- shaped ozone layer.

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Low PBL O3 due to the precipitation on 11/3 and 4, There high RH looks wrong Also, these should be much lower (<5%), possibly interfered by the high RH at lower alt.

No high surface ozone, here the high index (e.g., later than 11/9) is due to PM, not ozone (check ‘ozone peak and ‘Particle peak’) 14

300hpa 12Z /311/4 11/5 11/6

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RH and isotachs 20

21 Note the very broad low RH, different with other cases

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Apr. 5, 2011 case 23

Apr. 2 ozonesonde 24 3/31 GOME 4/1 GOME tropopause

Sonde 25 4/2 sonde 4/5 sonde (lower tropopause) Low RH, likely strato O3

26 4/5 sonde4/9 sonde 3/26 sonde4/2 sonde 3/26 RH has problem.

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Guess 28 Sunrise ~6:30LTSunset ~19:15LT FT-to-PBL transport after sunset 52ppbv63ppbv EPA Daily surface max 11 increase is a evidence of STE influence on surface? Also strato O3

GOME total ozone 29 4/5 GOME4/6 GOME

OMI OMI can be also downloaded here

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300hpa 12Z 32 4/3 4/6 4/5 4/4

500-hpa contour 33 4/5 12:00UTC 4/6 12:00UTC

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4/5 12Z 35

Profiler showing the jet 36

Profiler (no 4/7 data) 37

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40 Cold front pass Rain STE air SI 298 May reach ground

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42 4/44/5 4/64/7 Rain

/29 STE

8/20 and 8/27 sonde Note there is no ceilometer data for 8/25 26 ozone curtain.

Should be summer, not autumn The summer theta for STT is higher, averagely peaked at 315~330K, see Wernli 2002.

49 Low tropopause, STE before the lidar observation

2011/9/30 53

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55

2012/1/4 data 56

57

58 Low WV, SI

2012/4/6-7 data 59

61 Intrusion is here

2012/4/23-25 data 62

63 Note, very likely the MPR is not able to retrieve the low tropopause, also based on the 10/04/27 case

2012/5/10 data 64

65 have 5/11 data 318 A little close to summer, so tropopause theta is high