Choice of activity data

ACTIVITY DATA FOR TIER 1 VARIABLES

FAO datasets needed to estimate production, imports and exports of solidwood and paper products needed to estimate HWP Variables 1A, 2A, PIM, PEX, and H, for 1961 to the present, including default conversion factors, are provided in Tables 12.4 and 12.5. In order to include current year carbon release from HWP placed in use many decades ago, estimates are needed for HWP data prior to 1961. In order to estimate total harvest (Variable H) including bark, multiply the FAO estimate of harvest for products (Table 12.5) by a default bark expansion factor of 1.13 (Jenkins et al., 2003).

In order to estimate the variables in Table 12.5 prior to 1961, they are extrapolated backward to 1900 using Equation 12.6. Equation 12.6 uses a rate of change variable U to estimate values prior to 1961.10 The rate of

10 Countries formed after 1961 may not have data in the FAO database back to 1961. A way to extend more recent production, import and export data back to 1961 is to look at data back to 1961 for the "old" country that the "new"

change taken to approximate change in production, imports and exports prior to 1961 is the rate of change in industrial roundwood production. Default values for U are shown in Table 12.3 for major world regions.

Equation 12.6

Equation to estimate production, imports or export variables in Table 12.5 for

YEARS before 1961

Where:

Vt = annual production, imports or exports for a solidwood or paper product for year t, Gg C yr-1 t = year

V1961 = annual production, imports or exports for a solidwood or paper product for the year 1961, Gg C

yr-1

U = estimated continuous rate of change in industrial roundwood consumption for the region that includes the reporting county between 1900 and 1961 (see Table 12.3), yr-1

Table 12.3

Estimated annual rates of increase for industrial roundwood production (harvest) by world region for the period 1900 to 1961

Region

Annual Rate of Increase U

World total

0.0148

Europe

0.0151

USSR

0.0160

North America

0.0143

Latin America

0.0220

Africa

0.0287

Asia

0.0217

Oceania

0.0231

Source: See Table 3a.1.2 in HWP Appendix of GPG-LULUCF (IPCC, 2003).

Note: For each region the average rate of change over the period 1900 to 1961 is formed by combining a documented actual rate of change from 1950 to 1961 and an estimated rate of change from 1900 to 1950. The estimated rate from 1900 to 1950 is formed by adding together the annual percent change of population growth from 1900 to 1950 and one half the annual percent change in industrial roundwood harvest per capita for the period 1950 to 1975.

country was a part of (e.g., Czechoslovakia for the Czech Republic and Slovokia) and extend "new" country variables back to 1961 using the rate of change in each variable for the "old" country back to 1961.

Table 12.4

Default factors to convert from product units to carbon

Roundwood, industrial roundwood, sawnwood, ,other industrial roundwood, pulpwood, chips, particles, wood fuel, wood residues

Charcoal

Average for wood panels

Paper and paperboard, pulp, recovered fibre pulp, recovered paper

1. Density (oven-dry tonnes per m3 of solidwood product or oven dry per air dry tonne of pulp or paper product)

Temperate species

Tropical species

oven-dry tonne m-3

0.59 oven-dry tonne m-3

oven-dry tonne (air dry tonne)-1

0.628 oven-dry tonne m-3

oven-dry tonne (air dry tonne)-1

2. Carbon fraction (tonnes carbon per oven dry tonne of wood material)

0.5

0.5

0.85

0.468

0.5

3. Carbon factor (tonnes carbon per m3 of product or per air dry tonne of product)

A = 0.225 tonne C m-3

tonne C (air dry tonne)-1

tonne C (air-dry tonne)-1

(row 1) x (row 2)

Source: Temperate species density: Average from Table 4.14, Volume 4, Chapter 4; Tropical species density: Average from Table 4.13, Volume 4, Chapter 4.

Table 12.5

UN FAO ACTIVITY DATA NEEDED FOR TIER 1 VARIABLES, AND DEFAULT CONVERSION FACTORS

Aggregate variable

FAO database variables needed to compute aggregate variable (m3 for wood Gg for pulp and paper)

Time period (Inv. Yr = Inventory reporting year)

Carbon factor (Gg carbon per m3 for wood products or per Gg for paper & pulp) (see Table 12.4 for values)

Variable 1A — Consumption of solidwood or paper products

Production of solidwood

Other industrial roundwood

1961- Inv. yr.

A

products

Sawnwood

1961- Inv. yr.

A

Wood panels

1961- Inv. yr.

C

Other industrial roundwood

1961 - 1989

A

Imports and exports of solidwood products

Sawnwood

1961- Inv. yr.

A

Wood panels

1961- Inv. yr.

C

Production of paper and

Paper and paperboard - production (PPAPER)

1961- Inv. yr.

D

paperboard from wood [see note 1 below]

Other fibre pulp - production (OFPP), imports (OFPIM), and exports (OFPIM)

1961- Inv. yr.

D

Imports and exports of paper and paperboard

Paper and paperboard

1961- Inv. yr.

D

Variable 2A — Production of solidwood and paper products from wood harvested in the reporting country

Production of solidwood products as for Variable 1A above (PSW)

1961- Inv. yr.

A

Production of solidwood products from domestic harvest [ see note 2 below]

Industrial roundwood harvest (IRWH), imports (IRWim), exports (IRWex)

1961- Inv. yr.

A

Chips and particles imports (CPIM ), and exports (CPex)

1961-Inv. yr.

A

Production of paper and paperboard products from as for Variable 1A above (PPAPER)

1961- Inv. yr.

D

Production of paper and paperboard from domestic harvest [see note 3 below]

Industrial roundwood harvest (IRWH), imports (IRWIM), exports (IRWEX) - same as above

1961- Inv. yr.

A

Other fibre pulp - production (OFPP), imports (OFPM), and exports (OFPIM)- same as above

1961- Inv. yr.

D

Exports of wood pulp, recovered paper and recovered paper pulp (PPexports )

1961- Inv. yr.

D

Variables 3 and 4 — Imports and exports of all solidwood and paper products and wood fiber

Roundwood (includes fuelwood)

1961- Inv. yr.

A

Chips and particles

1961- Inv. yr.

A

Wood residue

1961- Inv. yr.

A

Imports and exports

Charcoal

1961- Inv. yr

B

Sawnwood

1961- Inv. yr.

A

Wood panels

1961- Inv. yr.

D

Wood pulp

1961- Inv. yr.

D

Recovered paper

1961- Inv. yr.

D

Variable 5 — Harvest for products

Harvest for products [see note 4 below]

Industrial roundwood (IRWH), fuelwood

1961- Inv. yr.

A

Notes:

1. Production of paper and paperboard from wood = Ppaper - (OFPP + OFPIM - OFPex )

2. Production of solidwood products from domestic harvest = PSW * IRWH / (IRWH + IRWIM - IRWEX + CPIM + CPEX )

3. Production of paper products from domestic harvest = (PPAPER+PPEXPORTs - (OFPP + OFPiM - OFPEX )) * IRWH / (IRWH + IRWim -IRWex + CPim + CPex )

4.Variable H = IRWH * BF + Fuelwood, BF (bark factor) default value = 1.13 ; Softwoods (1.11), Hardwoods (1.15) (Jenkins et al., 2003)

Source of variables and data: FAOSTAT Forestry database (FAO 2005).

Was this article helpful?

0 0
Guide to Alternative Fuels

Guide to Alternative Fuels

Your Alternative Fuel Solution for Saving Money, Reducing Oil Dependency, and Helping the Planet. Ethanol is an alternative to gasoline. The use of ethanol has been demonstrated to reduce greenhouse emissions slightly as compared to gasoline. Through this ebook, you are going to learn what you will need to know why choosing an alternative fuel may benefit you and your future.

Get My Free Ebook


Post a comment