Denmark's National Inventory Report 2005 - Submitted under the ...

The LULUCF sector contributes to a large part of the total estimated uncertainty.
Table 7.23 Tier 1 uncertainty analysis for LULUCF. No estimates are given for forestry and mineral soils.
Emission/sink,
Gg CO2-eqv.
Activity
data, %
Emission
factor, %
Combined
uncertainty
Total uncertainty,
%
Uncertainty
95%, Gg CO2eqv.
5.A Forests 3532.2 NE NE
Broadleaves, Forest remaining forest 997.3 NE NE NE
Conifers, Forest remaining forest 2427.3 NE NE NE
Broadleaves, Land converted to forest 66.3 NE NE NE
Conifers, Land converted to forest 41.3 NE NE NE
5.B Cropland and 5.C.Grassland -2112.4 48.0 1014.7
Mineral soils CO2 NE NE NE NE
Organic soils CO2 -2251.5 10 50 51.0 51.0 1148.1
Hedgerows CO2 131.0 5 20 20.6 20.6 27.0
Perennial horticultural CO2 8.0 10 10 14.1 14.1 1.1
5.D Wetlands 1.7 63.5 1.1
Land for peat extraction CO2 -0.4 10 50 51.0 51.0 0.2
Land for peat extraction N2O 0.1 10 100 100.5 100.5 0.1
Reestablished wetlands CO2 2.1 10 50 51.0 51.0 1.1
Liming 226.2 5 50 50.2 50.2 113.7
7.11 QA/QC and verification
7.11.1 Other areas
The area estimates given in the above sections are very precise due to unrestricted access to detailed
data from EUs Integrated Administration and Control System (IACS) on agricultural crops
on field level and the use of the vector based Land Parcel Information System (LPIS). This access
includes both Statistics Denmark and NERI. Together with detailed soil maps this gives a unique
possibility to estimate the agricultural crops on different soil types and hence track changes in land
use. However, IACS and LPIS are only available from 1998 and onwards, and estimates for 1990
are therefore more uncertain. The QA of crop data is made by Statistics Denmark. Data on hedgerows
are based on subsidised hedgerows and QA is carried out by “Landsforeningen af Plantningsforeninger”
who is responsible for the administration of the subsidiaries. The reestablishment
of wetlands is based on vector maps received from every county in Denmark. Hardcopies,
spreadsheets and digital maps are filed in secure files at NERI.
A range of experts from the Danish Institute of Agricultural Sciences are repeatedly involved in
discussions and report writings on topics related to the inventory. A formal agreement between
other institutions and NERI is made on data collection, calculations and how data are interpreted.
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