Harvested wood products in the u s national greenhouse gas inventory methodology and accounting
This presentation is the property of its rightful owner.
Sponsored Links
1 / 11

Harvested Wood Products: Topics PowerPoint PPT Presentation


  • 60 Views
  • Uploaded on
  • Presentation posted in: General

Harvested Wood Products in the U.S. National Greenhouse Gas Inventory: Methodology and Accounting. Harvested Wood Products: Topics. Overview of U.S. Emissions and Removals U.S. Estimation Method and Results for Harvested Wood Products Accounting Approach.

Download Presentation

Harvested Wood Products: Topics

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Harvested wood products in the u s national greenhouse gas inventory methodology and accounting

Harvested Wood Products in the U.S. National Greenhouse Gas Inventory: Methodology and Accounting


Harvested wood products topics

Harvested Wood Products: Topics

  • Overview of U.S. Emissions and Removals

  • U.S. Estimation Method and Results for Harvested Wood Products

  • Accounting Approach


Overview of u s greenhouse gas emissions 2002

Overview of U.S. Greenhouse Gas Emissions, 2002

Emissions = 6,935 Tg CO2 eq.

Removals = 691 Tg CO2 eq.

HWP = 215 Tg CO2 eq.


U s estimation method

U.S. Estimation Method

Method details for the U.S.–

  • Track Inputs to, and outputs from carbon pools

    • Begin in 1910, track to current time

  • Product carbon pools

    • Products in use

    • Products in dumps or solid waste disposal sites

  • Use forest sector model framework – the WOODCARB model

    • to track all products from annual harvest

    • to track imports/ exports


U s estimation example tracking carbon in single family houses

U.S. estimation example – tracking carbon in single family houses


Harvested wood products methodology

Harvested Wood Products: Methodology

Disposition of Carbon in Harvested Wood - U.S. Average

Removals

Emissions

Source: Heath and others, 1996; Skog and Nicholson, 1998


U s data

U.S. data

Annual Data Requirements

  • Harvest statistics

  • Product production

  • Product exports and imports

    Coefficients

  • Factors to convert product units to carbon

  • Distribution of products to end uses

  • Use life of products in end uses

  • Portion of discarded wood to dumps vs SWDS vs burning

  • Portion of wood in permanent vs temporary storage in SWDS

  • Decay rates in dumps & SWDS

    The U.S. assumes the coefficients are the same for products used domestically and products exported


U s product lifetime

U.S. Product Lifetime


Harvested wood products comparison of approaches

Harvested Wood Products: Comparison of Approaches

U.S. HWP Removals in 2002 = 215 Tg CO2 eq.

Variables from U.S. HWP Estimation Methods

Approaches:

Production (A+B) =215

Stock Change (A+C) =248

Atmospheric Flow (A + C – (D – E))=227


Harvested wood products timeline

Harvested Wood Products: Timeline

  • September 2004, UNFCCC HWP workshop

  • November 2004, IPCC Guidelines (GL) revisions, HWP experts meeting

  • **December 2004, SBSTA 21**

  • March 2005, 1st review of IPCC GL revision by experts

  • September 2004, 2nd review of IPCC GL revision by experts and governments

  • May 2006, SBSTA 24, IPCC GL revision presented to SBSTA


Conclusions

Conclusions

  • HWP is an important sink in the U.S.

  • Tracking HWP will highlight opportunities to better manage HWP pools

  • Transparency can be improved if countries report stock changes associated with both imports and exports regardless of approach

  • Encourage transparent reporting now, such that any approach can be applied in the future

  • Accounting systems should be consistent with IPCC default

  • There is a narrow window of opportunity to provide guidance to IPCC authors on HWP


  • Login