Atmospheric Flow Approach

ATMOSPHERE

Figure 12.A.2 System boundary of the Atmospheric Flow Approach.

Note: NEE = net ecosystem exchange of carbon, E = carbon release to the atmosphere from HWP in use, EW = carbon release to the atmosphere from HWP in SWDS, H = carbon transfer in the form of harvested wood biomass transported from harvest sites, W = carbon transfer of wood waste into SWDS, PEX = carbon transfer in the form of HWP exports, PIM = carbon transfer in the form of HWP imports, O = possible other cross-border carbon transfers from rest of AFOLU (assumed zero here).

The Atmospheric Flow Approach (AFA) estimates fluxes of carbon to/from the atmosphere for the forest pool (and other wood producing lands) and wood products pool within national boundaries, and reports where and when these emissions and removals occur. A country includes in its estimate of emissions/ removals the gross removals of carbon from the atmosphere due to tree biomass growth in forests and other wood producing land categories (net of decay within forests), and the carbon release to the atmosphere from oxidation of harvested wood products that are consumed in their country. The carbon release to the atmosphere from harvested wood products includes carbon release from imports to the reporting country.

The system boundary of the Atmospheric Flow Approach and the carbon pools under consideration are shown in Figure 12A.2. The pools are the same as in the Stock-Change Approach. The difference is that the Atmospheric Flow Approach estimates the atmospheric carbon exchange of the AFOLU Sector of the reporting country rather than stock changes within the country. The national carbon dioxide emissions are given by Equation 12A.3:

Figure 12A.2 may be used to express Equations 12A.3 and 12A.4 using either carbon stock change and carbon transfer variables (AChwp iudc, AChwp swdsdc Pm, Pex) or carbon release variables and carbon transfer variables ( |Chwp dc, H). Where:

NEE = net ecosystem exchange of C

Figure 12A.2 may be used to express Equations 12A.3 and 12A.4 using either carbon stock change and carbon transfer variables (AChwp iudc, AChwp swdsdc Pm, Pex) or carbon release variables and carbon transfer variables ( |Chwp dc, H). Where:

NEE = net ecosystem exchange of C

As the quantity -44/12 • A(AFOLU without HWP) is reported elsewhere, the HWP Contribution to be reported is given by Equation 12A.4:

Equation 12A.4 Atmospheric Flow Approach: HWP Contribution

HWP Contribution to AFOLU Net CO2 emissions AFA = -44/12 • [ACHWP iudc+ AChwp swdsdc +

HWP Contribution to AFOLU Net CO2 emissions AFA = -44/12 • [H - |CHWP DC]

In the specific case when stock change of carbon in the HWP pools is zero the carbon imports minus carbon exports must still be reported as the HWP Contribution to AFOLU net CO2 emissions (see Equation 12A.4).

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