1 / 11

Harvested Wood Products: Topics

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.

uttara
Télécharger la présentation

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. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

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

  2. Harvested Wood Products: Topics • Overview of U.S. Emissions and Removals • U.S. Estimation Method and Results for Harvested Wood Products • Accounting Approach

  3. Overview of U.S. Greenhouse Gas Emissions, 2002 Emissions = 6,935 Tg CO2 eq. Removals = 691 Tg CO2 eq. HWP = 215 Tg CO2 eq.

  4. 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

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

  6. Harvested Wood Products: Methodology Disposition of Carbon in Harvested Wood - U.S. Average Removals Emissions Source: Heath and others, 1996; Skog and Nicholson, 1998

  7. 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

  8. U.S. Product Lifetime

  9. 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

  10. 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

  11. 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

More Related