1

2010/04/27 data

2

MPR data, Courtesy of Dr. Kevin Knupp

3

Cloud

Cloud

No data

318

302

4

Note this high

Almost cutoff low

5

NAM RH, pressure-time cross section above HSV

lat:34.73, long: -86.65

http://nomads.ncdc.noaa.gov/

12Z 4/26 ~ 00Z 4/30, 100-1000hpaNote the starting time

6

NAM wind speed above HSV

The direction of the axis is north-south.

60m/s=216km/hour

Subtropical jet

7

Nov. 4, 2010 case

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.

12

13

298

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.

14

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’)

15

300hpa 12Z http://www.spc.nssl.noaa.gov/obswx/maps11/3 11/4

11/5 11/6

16

17

18

19

20

RH and isotachs

21

Note the very broad low RH, different with other cases

22

http://cimss.ssec.wisc.edu/mesoscale_winds/archive/05Nov10/

23

Apr. 5, 2011 case

24

Apr. 2 ozonesonde3/31 GOME

4/1 GOME

tropopause

25

Sonde4/2 sonde

4/5 sonde (lower tropopause)

Low RH, likely strato O3

26

4/5 sonde 4/9 sonde

3/26 sonde 4/2 sonde

3/26 RH has problem.

27

28

Guess

Sunrise ~6:30LT Sunset ~19:15LT

FT-to-PBL transport after sunset

52ppbv 63ppbv 63ppbvEPA Daily surface max

11 increase is a evidence of STE influence on surface?

Also strato O3

29

GOME total ozone

4/5 GOME 4/6 GOME

30

OMI

http://toms.gsfc.nasa.gov/ozone/ozone_v8.html

http://www.temis.nl/protocols/o3col/o3col_menu_omi.php?Year=2011&Month=04&Day=03OMI can be also downloaded here

31

32

300hpa 12Z4/3

4/64/5

4/4

33

500-hpa contour

4/5 12:00UTC 4/6 12:00UTC

34

35

4/5 12Z

36

Profiler showing the jet

37

Profiler (no 4/7 data)

38

39

40

Cold front pass

Rain

STE airSI

298

May reach ground

41

42

4/4 4/5

4/6 4/7Rain

43

2011 8/29 STE

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

Should be summer, not autumn

314

326318

The summer theta for STT is higher, averagely peaked at 315~330K, see Wernli 2002.

49

Low tropopause, STE before the lidar observation

53

2011/9/30

54

55

56

2012/1/4 data

57

58

Low WV, SI

59

2012/4/6-7 data

60

302

318

61

Intrusion is here

62

2012/4/23-25 data

63

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

64

2012/5/10 data

65

have 5/11 data

318

A little close to summer, so tropopause theta is high