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2 Emission inventories in New Zealand

A number of emission inventories have been carried out primarily in the urban areas of New Zealand since 1995. Table 2.1 summarises the most recent emission inventories carried out for different locations within New Zealand. This includes a summary of the sources and contaminants included in each inventory and some comments on the methodology employed. Readers should note that a new revised inventory for the Auckland region will be available shortly.

Table 2.1: Summary of the most recent emission inventories for New Zealand

 

Location Year Sources Contaminants Output Methodology

Auckland

1993

Transport, area, vegetation, industry

Particles, CO, NOx, SO2, CO2

t/ day

Grid square, wide range of sources, detailed data collection

Wellington

1998

Transport, industry, biogenic, domestic heating, burning and lawn mowing

PM10, NOx, CO, CO2, SO2, NMVOC

t/ day

Grid square, wide range of sources, detailed data collection

Christchurch

1999

Motor vehicles, domestic heating, industry

PM10, NOx, CO, CO2, SO2,

kg/ winter's day

Limited spatial resolution, comprehensive data collection for major sources only

Timaru

2001

Motor vehicles, domestic heating, industry

PM10, PM2.5, CO, NOx, benzene, BaP, dioxin, SO2, CO2

kg/ winter's day

Comprehensive data collection for major sources only

Dunedin & 10 ORC urban areas

1999

Transport, domestic heating, industry

PM10, NOx, CO, SO2

kg/day

Detailed data collection for most sources, some limitations in motor vehicle emissions assessment

Hamilton, Tokoroa, Te Kuiti, Taupo

2001

Transport, domestic heating, industry

PM10, CO, NOx, Sox, VOC, CO2

kg/day

Detailed data collection, reliant on 1997 industry assessment

Nelson

2001

Motor vehicles, domestic heating, industry, outdoor burning

PM10, PM2.5, CO, VOC, NOx, benzene, SO2, CO2

kg/day

Comprehensive data collection for major sources only

Richmond

2000

Motor vehicles, domestic heating, industry, outdoor burning

PM10, PM2.5, CO, VOC, NOx, benzene, SO2, CO2

kg/day

Detailed data collection for most sources, some limitations in motor vehicle and outdoor burning emissions assessment

Gisborne

1996

Transport, area, industrial, agricultural, natural

TSP, SOx, NOx, VOC, CO, CO2

t/ year

Screening approach to major sources, high potential for error

Bay of Plenty

1997

Transport, industry, domestic, pollen, agriculture, geothermal

TSP, SO2, CO, NOx, H2S, dioxins

t/ year

Screening approach to major sources, high potential for error

Northland

non-specific

Motor vehicles, domestic heating, industry, agriculture

PM10, CO, NOx, SOx, NMVOC, CO2, N2O, CH4

t/ year

Detailed data collection for most sources, some screening methods used

Taranaki

1998

Motor vehicles, domestic heating, industry, farm animals, vegetation

PM10, PM2.5, CO, NOx, VOC, BaP, CH4, N2O, NMHC

t/ year

Screening approach to major sources, high potential for error