Month

Average O3
(20:00- 08:00 h)
ppbv

Average O3
(08:00-20:00 h)
ppbv

O3 minimum (ppbv)

O3 maximum (ppbv)

Rate of increase
(08:00-11:00 h) ppbv/h

Rate of decrease (17:00-19:00 h)
ppbv/h

January

4.4±2.0

29.3±4.3

2.8

44.6

8.2

-11.9

February

4.7±1.9

26.5±4.2

3.0

40.6

7.5

-10.0

March

5.2±1.8

22.6±3.9

3.5

36.1

6.6

-5.9

April

4.9±1.8

20.1±3.8

3.9

31.9

4.2

-6.2

May

5.7±1.9

21.5±4.1

4.5

31.2

5.2

-7.0

June

3.6±1.2

13.0±3.4

2.5

21.4

4.1

-2.4

July

2.8±1.2

11.0±3.4

1.9

16.4

2.9

-3.0

August

4.1±1.3

11.3±3.4

2.3

18.6

2.4

-2.7

September

4.3±1.4

13.5±3.4

2.6

22.4

2.2

-3.3

October

5.5±1.4

15.2±3.6

3.7

26.1

2.0

-3.5

November

5.2±1.5

24.4±3.9

2.9

37.1

5.3

-7.5

December

4.1±2.0

31.9±4.7

2.7

46.9

9.2

-14.0

Table 1: Monthly average daytime and night time O3, maximum and minimum O3 and the rate of change of O3 at KUC.