ghg-inventory-1990-2013

Other – Other non-specified – Solid Fuels
Other – Other non-specified – Liquid Fuels
Pulp, Paper and Print – Gaseous Fuels.
Key categories identified in the 2013 trend assessment from the manufacturing industries
and construction category include CO 2 emissions from:
Chemicals – Gaseous Fuels
Other – Mining and Construction – Liquid Fuels
Other – Other non-specified – Solid Fuels
Other – Non-metallic Minerals – Solid Fuels
Pulp, Paper and Print – Gaseous Fuels.
Methodological issues
To ensure there is no double counting of emissions, there are some instances where
emissions from the use of solid fuels and gaseous fuels are excluded from this category as
they are accounted for under the Industrial Processes sector. New Zealand Steel uses coal
as a reducing agent in the steel-making process. In accordance with IPCC, 1996,
guidelines, the emissions from this are included in the Industrial Processes sector rather
than the Energy sector. There are a number of instances where natural gas is excluded
from the manufacturing industries and construction subcategory as it is accounted for
under industrial processes. This includes urea production, hydrogen production and some
of the natural gas used by New Zealand Steel (New Zealand Steel separately reports its
emissions from natural gas as part of the combustion process and natural gas as part of
the chemical process).
Activity data
The previous submission further disaggregated emissions formerly reported under
subcategory 1.AA.2.g Manufacturing industries and construction – other into specific
subcategories. This resulted in the ‘other’ subcategory becoming much smaller.
Energy balance tables released with Energy in New Zealand (Ministry of Business,
Innovation and Employment, 2014) split out industrial uses of energy using the Australia
New Zealand Standard Industrial Classification 2006. This was possible because of the
collection of more detailed information from the various surveys used to compile the
energy balance tables since 2009.
This has allowed a further disaggregation of the manufacturing industries and
construction category and, therefore, greater transparency. Where actual survey data
is not available at the required level, estimates of the energy use across these
subcategories have been made to ensure time series consistency. These are described in
further detail below.
Solid fuels
In 2010, the disaggregation of the ‘manufacturing industries’ category for coal was
implemented within the energy greenhouse gas data system. This was the first time this
category has been disaggregated and applied from 2009. These percentage splits, based
on 2009 data, were applied to activity data for the annual inventory submission across the
whole time series (back to 1990). However, during 2014 the coal data system at the
Ministry of Business, Innovation and Employment was revised to internally disaggregate
manufacturing industries based on a 2011 survey of major coal users. Therefore, the
64 New Zealand’s Greenhouse Gas Inventory 1990–2013