ghg-inventory-1990-2013

incorporating new data collected from post-1989 planted forests into the mineral soil
organic carbon estimates, this changes not only the estimates for post-1989 planted
forests but for other land uses also.
The impact of these recalculations on net CO 2 -e emissions in each land-use category is
provided in table 6.1.8. Emissions for the harvested wood products pool are included at
the end of the table so a comparison of the relative size of reporting changes can be made.
Table 6.1.8 Recalculations to New Zealand’s net LULUCF emissions for 1990 and 2012
Net emissions (kt CO 2 -e)
2015
submission:
1990
estimate
2015
submission:
2011
estimate
Change in
1990
estimate
(%)
Change in
2012
estimate
(%)
2014
2014
Land-use
category
submission:
1990 estimate
submission:
2011 estimate
Forest land –39,135.7 –28,256.8 –33,147.4 –25,644.7 –27.8 –22.6
Cropland 479.6 479.1 465.6 455.4 –0.1 –2.2
Grassland 810.4 1,104.3 5,368.7 6,247.4 +36.3 +16.4
Wetlands 218.2 –21.8 44.4 7.2 –110.0 –83.8
Settlements 6.3 2.3 –3.0 0.3 –63.7 –110.8
Other land 6.2 7.7 17.8 38.6 +24.1 +117.3
Total –37,615.0 –28,654.4 –27,253.9 –27,848.8 –23.8 2.2
Harvested wood
products NA –1,969.2 NA –8,952.9 NA NA
Note:
NA = not applicable. Net removals are expressed as a negative value to help the reader in
clarifying that the value is a removal and not an emission. Columns may not total due to
rounding. The 2014 submission figures have been updated with the revised global warming
potentials from the global warming potentials from the Contribution of Working Group I to
the Fourth Assessment Report of the IPCC (IPCC, 2007) so vary slightly from those
published in the 2014 submission. These values also exclude emissions from liming at
both dates.
Detailed information on the recalculations is provided below in the relevant sourcespecific
recalculations sections and in chapter 10.
6.1.5 LULUCF planned improvements
Category-specific planned improvements are reported separately under each of the
relevant sections of this chapter. The major themes are:
continued method development to implement the 2006 IPCC guidelines (GPG-
AFOLU, IPCC, 2006a)
improvements to mapping as further data becomes available
harvest modelling improvements
research is currently under way to assess the end-use and life-span of exported raw
materials to improve New Zealand’s harvested wood products estimate.
6.2 Representation of land areas
The total land area of New Zealand is 26,925.2 kilohectares. This includes all significant
New Zealand land masses; the two main islands, the North Island and South Island, as
well as Stewart Island, Great Barrier Island, Little Barrier Island, the Chatham Islands,
the sub-Antarctic islands and other, small outlying islands.
New Zealand has used Reporting Method 2 and Approach 3 to map land-use changes
between 1 January 1990 and 31 December 2013 (IPCC, 2006a, chapter 3.3.1). The total
New Zealand’s Greenhouse Gas Inventory 1990–2013 201