Post on 17-Jan-2018
description
Approach = WHAT
Estimates of: When and where When
Changes in stocks
Stock change Production
Emissions Atmospheric flow Simple decay
Revised IPCC 1996 Guidelinesannual biomass growth versus annual harvest, including the
decay of forest products and slash left during harvest
Atmospheric impact = SF – DF – LM – DP
WhereSF = sequestration in the forestDF = decay of residues in forestLM = losses at mills during processing
(burnt to waste or used for energy)DP = decay of products
(related to lifetime in use or in disposal sites)
Atmospheric impact = SF – DF – Harvestonly if instant oxidation on leaving the forest
Stock changes or Emissions
1990 2000 2010 2020 2030
Car
bon
stoc
ks
1990 2000 2010 2020 2030
Deforestation
non-Kyoto countriesPre 1990
CDM
Forest management
A&Re-forestation
Forests Products
Stock changeIn all forestsResulting from activities since 1990
SinksIn all forestsResulting from activities since 1990
Within national boundaries = from activities within national boundaries
Stock changeIn all productsIn products manufactured since 1990In products resulting from activities since 1990
Sources from All harvested wood burning and decayHarvested wood since 1990Harvested wood resulting from activities since 1990
Within national boundaries (incl import-export)From domestic activities (excl import-export)
Simple Decay approachstocks resulting from activities
Sink
Source – residues
Source – products
Stock
Time
Tier 1 – at harvest Tier 2 – default categories
and lifetimesTier 3 – improved categories
and lifetimes
Consistency
Residues: oxidise immediately or decay Reversal of sink when it occurs Applicable at project or national scale Consistent reporting and accounting Desirable outcomes (submissions)
Sustainable Forest Management
Sawlog regime Pulplog regime
Stock
Bioenergy and Processing Emissions remain responsibility of producer
no change to bioenergy or trade impacts Improved inventory accuracy Favour long rotations for sawlogs Encourage high conversion (to product)
efficiency Sawmills least energy intensive Opportunity for energy exporting sector Including waste disposal sites reduces
incentive for bioenergy
Inventory impact
Emissions (during the year) Stocks (end of year)
Yr Growth Harvest 1 2 3 4 5 1 2 3 4 5
1 100 100 50 5 5 5 5 50 45 40 35 30
2 100 100 50 5 5 5 50 45 40 35
3 100 100 50 5 5 50 45 40
4 100 100 50 5 50 45
etc 100 100 50 50
Emit/year 50 55 60 65 70 Total 50 95 135 170 200
change 50 45 40 35 30
annual biomass growth versus annual harvest, including the decay of forest products and slash left during harvest
Production Approach: growth – harvest + hwp stock changeSimple decay: growth - emissions
Inventory impactsHarv Emissions (tC)
Year Type tC 1 2 3 4 5 6 7
1 Pine 100 50 10 10 10 10 10
1 SRF 100 50 50
1 Defor 100 100
Total 200 200 60 10 10 10 10
2 Old 60 10 10 10 10
2 Sawn 100 50 10 10 10 10 10
2 Pulp 100 50 50
Total 200 160 70 20 20 20 10
ConclusionsSimple Decay approach Described in 1996 Guidelines Satisfies Marrakesh principles Simple to apply (all Tiers) National reporting and accounting Scaleable Promotes sustainable forest management Promotes bioenergy
Management of products is separate issue