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Figure 7.11:

Sulphur dioxide (SO2) levels and emissions in main centres of population

Return to the point in the document where this figure is located.

Auckland (Penrose) SO2

Auckland (Penrose) SO2

 

Christchurch (St Albans) SO2

Christchurch (St Albans) SO2

 

Notes:

(1) The size of the pie graphs is proportional to the amount of emissions in each location represented.

(2) Auckland emissions represent daily emissions throughout the year rather than daily emissions during winter.

(3) Christchurch emissions shown are estimates of oxides of sulphur (SOx).

(4) Monitoring data for sulphur dioxide levels is not available for Hamilton, Wellington, and Dunedin.

(5) µg/m3 = micrograms per cubic metre.

Data sources: Data compiled from Air and Environmental Services Ltd, 2001; Auckland Regional Council, 2006a; Auckland Regional Council, 2006b; Environment Canterbury, 2004; Environment Canterbury, 2006; Environment Waikato, 2006b.

Text description of figure

Sulphur dioxide (SO2) levels and emissions in main centres of population

Emissions

Auckland

Christchurch (winter)

Wellington (winter)

Hamilton (winter)

4200 t/yr

10560 kg/day

7380 kg/day

1229 kg/day

Sector

Transport

65%

15.00%

92.00%

49.00%

Domestic

32%

4.00%

3.00%

6.00%

Industry

3%

80.00%

5.00%

44.00%

Other

 

 

 

1.00%

SO2 levels for Auckland and Christchurch

 

Auckland (Penrose)

Christchurch (St Albans)

Year

1hr max (µg/m3)

Annual average

1hr max (µg/m3)

Annual average

1988

 

 

239

 

1989

 

 

124

5

1990

 

 

193

14

1991

 

 

319

 

1992

 

 

95

10

1993

 

 

80

 

1994

 

 

120

5

1995

 

 

85

 

1996

 

 

124

7

1997

 

 

106

7

1998

 

 

34

2

1999

 

 

67

4

2000

 

 

82

4

2001

165

8

65

5

2002

48

2

52

5

2003

48

4

54

5

2004

40

5

46

3

2005

54

7

37

3