Research Results: Impact of Sea Breeze on Ozone

Edgewood, MD

Joel MaruschakVictoria Faranca

Date \ Hour: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 2307/01/2011 2 2 2 9 18 19 27 37 50 60 67 72 72 75 77 84 92 91 87 69 56 45 32 1407/02/2011 21 19 19 11 21 26 42 49 66 80 87 93 107 118 118 113 108 103 101 87 77 80 73 6707/03/2011 66 73 62 51 41 37 31 33 40 46 61 75 78 89 86 81 76 71 72 60 48 44 36 2407/04/2011 22 21 18 11 14 11 17 23 33 41 48 57 60 57 59 60 55 48 45 47 43 46 40 3607/05/2011 26 21 16 13 10 7 17 30 43 61 73 75 82 89 96 100 107 115 109 88 82 71 63 5807/06/2011 35 22 21 17 12 7 10 23 38 47 53 59 78 83 65 58 57 48 40 3207/07/2011 30 28 24 16 9 6 13 24 38 63 79 89 102 96 88 93 76 76 57 45 39 31 27 2007/08/2011 26 21 21 20 15 13 14 20 40 47 51 53 53 52 52 46 54 50 42 29 30 25 18 1307/09/2011 11 16 14 15 10 5 16 29 41 50 53 55 56 56 57 66 71 68 61 41 32 24 11 207/10/2011 11 11 10 11 14 14 23 30 41 51 57 63 71 67 74 72 68 68 68 66 52 53 47 4307/11/2011 37 36 41 40 42 35 33 39 48 57 61 59 58 65 72 64 59 57 58 57 46 43 36 2807/12/2011 17 11 11 6 2 2 7 24 38 51 56 59 61 61 62 63 64 65 58 49 42 39 49 5307/13/2011 51 52 49 43 39 33 35 40 44 56 55 56 57 52 44 41 55 49 43 29 22 34 35 3307/14/2011 31 30 27 29 26 19 20 26 31 36 41 55 54 49 45 39 36 33 3307/15/2011 34 35 34 28 17 9 12 21 32 40 49 55 64 77 79 74 71 60 53 53 51 44 38 2707/16/2011 22 14 10 11 7 7 7 15 25 42 52 60 65 60 53 53 51 46 45 42 43 42 42 3907/17/2011 37 31 22 23 28 25 29 36 40 48 56 61 56 52 53 51 50 51 46 43 41 36 34 3207/18/2011 29 26 24 22 16 13 21 27 33 45 59 78 101 106 93 82 70 65 62 58 48 44 42 3407/19/2011 27 20 15 11 7 2 9 22 41 55 65 70 44 57 60 66 60 63 68 56 4907/20/2011 42 36 26 21 22 19 26 42 50 62 76 75 72 74 76 74 73 75 74 62 57 52 50 5407/21/2011 58 50 30 24 17 17 36 41 48 60 70 78 68 69 78 69 65 60 55 52 56 58 50 4207/22/2011 25 13 11 16 12 7 9 26 42 61 71 103 86 93 98 118 109 85 88 73 54 34 20 23

Green: Values Below 10

Red: Values above 70

Times in Local Standard Time

Daytime / Overnight Pattern

Date (LST) Daily Mean Max Overnight Mean Daytime Mean Mean Difference

07/01/2011 48.29 92 20.54545 74.66667 54.12121

07/02/2011 70.25 118 41.45455 98.41667 56.96212

07/03/2011 57.54 89 46.63636 69.58333 22.94697

07/04/2011 38 60 25.36364 50.83333 25.4697

07/05/2011 60.5 115 34.90909 86.5 51.59091

07/06/2011 40.25 83 27.36364 60.125 32.76136

07/07/2011 48.71 102 22.09091 75.16667 53.07576

07/08/2011 33.54 54 19.63636 47.41667 27.7803

07/09/2011 35.83 71 14.18182 56.25 42.06818

07/10/2011 45.21 74 26.27273 63.83333 37.56061

07/11/2011 48.79 72 37.90909 59.58333 21.67424

07/12/2011 39.58 65 21.72727 57.25 35.52273

07/13/2011 43.63 57 38.72727 48.41667 9.689394

07/14/2011 34.74 55 29.36364 44.42857 15.06494

07/15/2011 44.04 79 29.90909 58.91667 29.00758

07/16/2011 35.54 65 22.18182 49.5 27.31818

07/17/2011 40.88 61 30.72727 50.58333 19.85606

07/18/2011 49.92 106 29 71 42

07/19/2011 41.29 70 29.72727 57.55556 27.82828

07/20/2011 53.75 76 36.81818 70.25 33.43182

07/21/2011 52.13 78 39.81818 64.33333 24.51515

07/22/2011 53.21 118 20.36364 85.58333 65.2197

07/23/2011 53.79 109 27.90909 78.83333 50.92424

07/24/2011 49.79 66 36.81818 62.16667 25.34848

07/25/2011 41.25 70 28.90909 52.08333 23.17424

07/26/2011 41.58 80 19.27273 63.41667 44.14394

07/27/2011 36.46 57 24.27273 48.25 23.97727

07/28/2011 40.88 77 16.72727 65.16667 48.43939

07/29/2011 47.38 93 25.81818 70 44.18182

Impressive Days

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Percent Cloud Cover: ZeroJuly 02, 2011Worst day of the month in terms of ozone concentrations. Highest daytime mean Highest max ozone Highest overall average!

Clear skies with no clouds throughout the entire day

Warm temperatures BL mixing Strong PM wind shift with

increasing wind speed. Rapid increase in ozone Evidence of Sea Breeze

July 2, 2011 – Highest Ozone Maximum and Highest Average, Highest Difference Between Overnight and Daytime Means

July 03, 2011Maximum Overnight Mean Mostly cloudy Evidence of sea breeze Northwest wind brought higher

concentrations of ozone from south central PA into the area.

Increasing ozone concentrations overnight

46 ppb for overnight mean

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Percent Cloud Cover

July 3, 2011 – Maximum Overnight Mean

July 08, 2011Overall lowest average ozone Cloudy skies!! Clearest skies during overnight

hours Large wind shift Not well mixed Increasing wind speeds throughout

the day Evidence of Sea Breeze Secondary drop in ozone likely due

to heavy rain in afternoon

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Percent Cloud Cover

4:22 PM 75.2 °F - 73.4 °F 94% 29.73 in 0.5 mi West 10.4 mph 27.6 mph 0.43 in Fog , Rain , Thunderstorm

Heavy Thunderstorms and Rain

4:33 PM 73.4 °F - 71.6 °F 94% 29.72 in 1.0 mi West 11.5 mph 20.7 mph 0.63 in Rain , Thunderstorm

Heavy Thunderstorms and Rain

July 8, 2011 – Overall Lowest Average Ozone

July 09, 2011Lowest overnight mean of the month Overcast during the evening and

clear during the AM hours. Clouds leading to minimal mixing

of BL. Although this day was sunny and

favorable for Ozone production, the strong daytime winds were blowing ozone out to sea throughout the day.

Thus no evidence of sea breeze! ~14ppb for overnight average

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Percent Cloud Cover

July 9, 2011 – Lowest Overnight Mean

July 14, 2011Lowest daytime mean of the month Likely due to missing data! Very clear skies This could have been an average

day or potentially even a high ozone day.

140500Z140600Z140700Z140800Z140900Z141000Z141100Z141200Z141300Z141400Z141500Z141600Z141700Z141800Z141900Z142000Z142100Z142200Z142300Z

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Percent Cloud Cover

July 14, 2011 – Lowest Daytime Mean

July 22, 2011Overall highest max of the month Clear skies during the daytime Moderate mixing HAZE Strong winds blowing dirty air into

area during the day causing ozone to peak during the day.

Ozone likes warm temperatures Over 100°F

Max of 118 ppb 220000Z

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Percent Cloud Cover

1:54 PM 102.0 °F 115.8 °F 75.0 °F 42% 29.87 in 9.0 mi WSW 8.1 mph - N/A Scattered Clouds

2:54 PM 104.0 °F 116.8 °F 73.9 °F 38% 29.85 in 10.0 mi West 8.1 mph - N/A Scattered Clouds

3:54 PM 105.1 °F 113.6 °F 70.0 °F 32% 29.85 in 10.0 mi West 9.2 mph - N/A Scattered Clouds

4:54 PM 105.1 °F 113.6 °F 70.0 °F 32% 29.83 in 10.0 mi NW 5.8 mph - N/A Scattered Clouds

July 22, 2011 – Highest Ozone Reading

Aggregate Plot of All July Days

010500Z020100Z022100Z031700Z041300Z051000Z060600Z070200Z072200Z081800Z091400Z101000Z110600Z120200Z122200Z141200Z150800Z160400Z170000Z172000Z181600Z191200Z200800Z210400Z220000Z222000Z231600Z241200Z250800Z260400Z270000Z272000Z281600Z291200Z300800Z310400Z010000Z

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Clouds

Percent Cloud Cover

Questions?