Ispra, 22./23.09.2005 | Folie 1 Reporting LUCF to UN-FCCC: The Situation in Austria Workshop:...
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Transcript of Ispra, 22./23.09.2005 | Folie 1 Reporting LUCF to UN-FCCC: The Situation in Austria Workshop:...
Ispra, 22./23.09.2005 | Folie 1
Reporting LUCF to UN-FCCC: The Situation in Austria
Workshop: Improving the Quality of Community GHG Inventories and Projections for the LUCF Sector
Ispra, September, 22th-23th, 2005
Alexandra Freudenschuß Peter Weiss
Ispra, 22./23.09.2005 | Folie 2
Overview
Present quantification method of the C balance of the Austrian forest biomass
Present approach of biomass expansion in Austria and comparison with different approaches
A pragmatic uncertainty estimate Approach for estimating LUC from and to
forest Ongoing and future activities
Ispra, 22./23.09.2005 | Folie 3
Institutional Responsibilities
Federal Research and Training Centre forForests, Natural Hazards and Landscape(BFW):
National Forest Inventory (NFI)National Forest Soil Inventory
Umweltbundesamt:Austrian GHG Inventory
Co-operation between Umweltbundesamt and BFW:
for estimating CO2-balance of forests
Ispra, 22./23.09.2005 | Folie 4
Data sources
Austrian NFI (BFW): measured data on forest area, increment and harvest, stocks since 1961
NFI: 4 x 4 km grid, 4 x 300 m2 permanently marked sample plots at each grid point
Further national statistics to derive relative indices for the calculation of annual data: Increment indices, annual Austrian records of wood felled, Austrian wood balance
Literature data to derive conversion factors: wood densities, allometric relations and C-contents
Ispra, 22./23.09.2005 | Folie 5
Definition of Forest Land according to the Forest Act and NFI
Area stocked by trees at least 1000 m2 (NFI 500 m2) average width of at least 10 m unstocked forest areas due to forest management practices Non-forest land:
crown cover of less than 30% (except due to forest management practices)
areas stocked by shrubs (except coppice stands and protective forests)
rows of trees (except wind belts) short rotation plantations (rotation period < 30 years) Christmas tree cultures, forest nurseries, plantations for seeds of
forest trees or fruits
Ispra, 22./23.09.2005 | Folie 6
Carbon Pools
Reported: Biomass above ground and below ground
Not estimated, so far: Litter/dead organic matter Soils Dead wood
Ispra, 22./23.09.2005 | Folie 7
Present quantification method of the C balance of the Austrian forest biomass
Mean annual increment by NFI (m3 stemwood o.b.)
converted to
Annual increment (m3 stemwood o.b.)
converted to
Annual increment (t stemwood o.b.)
converted to
Annual increment (t of total tree biomass)
converted to
Annual increment(t C of total tree)
Mean annual drain by NFI (m3 stemwood o.b.)
converted to
Annual drain (m3 stemwood o.b.)
converted to
Annual drain (t stemwood o.b.)
converted to
Annual drain (t of total tree biomass)
converted to
Annual drain(t C of total tree)
Net uptake/release [t C] = annual increment - annual drain [in t C]
Ispra, 22./23.09.2005 | Folie 8
Why do we use increment minus drain and not stock change method
Results of NFI 2000/02 (BFW 2004): Stemwood volume stock:
988 +- 16 Mio. m3 o.b. Mean annual stemwood increment:
27.3 +- 0.6 Mio. m3 o.b. Mean annual stemwood drain:
19.5 +- 0.6 Mio. m3 o.b. Uncertainty of volume stock has the same order of
magnitude as the mean annual increment or drain Stock change method results in higher uncertainty of
the figures for net uptake/release
Ispra, 22./23.09.2005 | Folie 9
Conversion of the mean for a NFI period to data for individual years
Annual increment indices: based on 1,197 Austrian increment cores of Norway spruces across all age classes and site conditions (BFW and Institute for Forest Growth and Yield Research)
Annual harvest indices: Austrian annual records of wood felled (Federal Ministry of Agriculture, Forestry, Environment and Water Management)
Ispra, 22./23.09.2005 | Folie 10
Conversion of periodical means to annual values
15
20
25
30
35
61/70 71/75 76/80 86/90 92/96
Mio m3 o.b.
90
100
110
120
130
Index
Mean annual increment Annual increment indices
Ispra, 22./23.09.2005 | Folie 11
Used data for the conversion factors
“m3 stemwood o.b. t d.m. stemwood“: literature data on the densities of all Austrian tree species (= ratio of the dry mass over the water saturated volume of the stemwood)
“t d.m. stemwood t d.m. whole tree biomass” (incl. below ground biomass): literature data from European ecosystem studies on dry mass relations of the stemwood to the other tree compartments for the main Austrian tree species (spruce, pine, beech, oak) and for individual age classes
“t d.m. whole tree biomass t C whole tree biomass“: literature data on the C contents for individual tree compartments and species
Ispra, 22./23.09.2005 | Folie 12
Conversion and expansion factors for Austria
The factors are calculated for each NFI period, separately for increment and drain and according to the individual age class and species composition:
Ispra, 22./23.09.2005 | Folie 13
Development of biomass functions on basis of Austrian data
Discovering of several sets of single tree data from Austria:
Federal Office and Research Centre for Forests (Neumann Markus)
Institute of Botany (Univ. Innsbruck - Katharina Munk, Dagmar Rubatscher)
Institute for Forest Growth and Yield Research (Univ. of Natural Resources and Applied Life Sciences, Vienna - Otto Eckmüllner)
Institute of Silviculture (Univ. of Natural Resources and Applied Life Sciences, Vienna - Edi Hochbichler, Panagoitis Bellos, Erwin Lick)
Request for additional national funding for the development of biomass functions on basis of these data (Umweltbundesamt as project co-ordinator)
Results and functions will be published in a special issue of the Austrian Journal of Forest Science (end of 2005)
Ispra, 22./23.09.2005 | Folie 14
Uncertainty analysis
the statistical uncertainty of the forest inventory the uncertainty related to the calculation of annual
data the uncertainty related to the missing consistency
of different statistics the uncertainty of each conversion and expansion
factor (estimated by a pragmatic and conservative approach)
Error propagation
Ispra, 22./23.09.2005 | Folie 15
Approach for LUC from and to forest (1)
Data source: NFI 2000/2002 Evaluation of 2/3 of the forest boundary points
where land use changes took place For the years before 1997 the same ratio of land
use changes was assumed Annual increment on LUC to forest: 3m3/ha Average loss of stemwood o.b. on LUC from forests:
31.2±8.1 m3/ha (conif.), 6.5±1.9m3/ha (decid.)
Ispra, 22./23.09.2005 | Folie 16
Approach for LUC from and to forest (2)
Ispra, 22./23.09.2005 | Folie 17
Ongoing and future activities
Development of biomass functions based on Austrian datafinalised end 2005recalculation of data series
Provide data for LUC from and to cropland and grassland (Tier 1)
Other categories (settlement, wetland, others) still under discussion
Ispra, 22./23.09.2005 | Folie 18