Figure 7.11: Sulphur dioxide (SO2) levels and emissions in main centres of population
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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 |
