1 / 19

4.3. Carbon accounting: Field measurements

4.3. Carbon accounting: Field measurements. Markku Kanninen, CIFOR. Carbon accounting 3: Field measurements. Indirect methods for aboveground tree biomass (tree measurement allometric equations, expansion factors, carbon ratio) Direct methods for aboveground tree biomass Destructive sampling

holly-wynn
Download Presentation

4.3. Carbon accounting: Field measurements

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. 4.3. Carbon accounting: Field measurements Markku Kanninen, CIFOR

  2. Carbon accounting 3: Field measurements • Indirect methods for aboveground tree biomass (tree measurement allometric equations, expansion factors, carbon ratio) • Direct methods for aboveground tree biomass Destructive sampling • Establishment of allometric equations • Methods for other components (litter, soil, non woody biomass)

  3. Five C pools (IPCC GPG)

  4. Existing guidebooks & manuals • Pearson, Walker and Brown (2005): Sourcebook for Land Use, Land-Use Change and Forestry Projects • IPCC Good Practice Guidance (2003) • Segura & Kanninen (2001): Inventario para estimar carbono en ecosistemas forestales tropicales [In Spanish] • MacDicken (1997): A Guide to Monitoring Carbon Storage in Forestry and Agroforestry Projects

  5. Field measurements - steps Inventory/field plots Forest area - stratification Age class distribution Volume &biomass - branches, leaves etc. Destructivemeasurements Sample Calculation of the forest carbon pool Wood dry density Carbon fraction Volumeequations FEB Biomassmodels Carbon model Source: Segura & Kanninen 2001

  6. Stratification • Allows to obtain a certain precision of estimations with lower cost than without stratification • Steps: • Divide heterogeneous population into homogenous groups • Apply monitoring (sampling & calculations) to each strata and compile results at the end

  7. Sample size • Calculate the sample size n (number of plots) – based on pre-sampling Where • n = number of plots to be measured • Syx = estimation error • t = Studet t value • S = variance • X = mean value

  8. Field plots • Establish permanent plots if you can (monitoring) • Plot with varying sizes and shapes can be used

  9. Measuring tree biomass • Direct methods • Destructive sampling • Allometric equations • Indirect methods • Volume equations • Allometric equations • Biomass expansion factor (BEF)

  10. Destructive measurements • These direct measurements are needed to generate equations (allometric models) for biomass components that can be used later for indirect estimations • Based on distribution of the population (e.g. age classes, diameter class) a sub-sample for trees to be felled for destructive measurements is selected

  11. Volume & biomass equations Based on destructive measurements, volume equations (for stems) and allometric equations are constructed between easily measurable variables (e.g. tree diameter) and biomass component (e.g. branch biomass) Source: Brown 1997

  12. Biomass expansion factor (BEF) • BEF is the relation between the total tree biomass (Btot)and the stem biomass (Bstem ) • It is used to estimate indirectly the total tree biomass using stem biomass (easy to measure) • Btot = Bstem * BEF Source: Segura & Kanninen 2005

  13. Allometric equations: example Source: Penman et al. 2003

  14. Source Penman et al. 2003

  15. Below ground biomass • Direct methods • Destructive sampling • Allometric equations • Indirect methods • Equations

  16. Dead organic matter • Litter • Sampling • Dead wood • sampling

  17. Soil organic carbon

  18. Thank you for your attention

  19. References • Brown, S. 1997 Estimating biomass and biomass change of tropical forests – A primer. FAO Forestry Paper No. 134. • Hoover, Coeli M (Ed.) 2008 Field Measurements for Forest Carbon Monitoring: A Landscape-Scale Approach. 242 p. Available at: http://www.springer.com/life+sci/ecology/book/978-1-4020-8505-5 • MacDicken, K. G. 1997 A Guide to Monitoring Carbon Storage in Forestry and Agroforestry Projects. Winrock International. • Pearson, T., Walker, S. and Brown, S. 2005 Sourcebook for land use, land-use change and forestry projects. Winrock International and the BioCarbon Fund of the World Bank. 57 p. • Penman. J. et al. 2003 Good practice guidance for land use, land-use change and forestry. IPCC National Greenhouse Gas Inventories Program and Institute for Global Environmental Strategies, Kanagawa, Japan. Available at: http://www.ipcc-nggip.iges.or.jp/public/gpglulucf/gpglulucf.htm. • Segura, M. and Kanninen, M. 2001 Inventario para estimar carbono en ecosistemas forestales tropicales. In: L. Orozco & C. Brumér (eds.), Inventarios forestales para bosques latifoliados en America Central, Capítulo 8. CATIE-Centro Agronómico Tropical de Investigación y Enseñanza. Pp. 202-216. [In Spanish] • Segura, M. and Kanninen, M. 2005 Allometric models for estimating volume and total aboveground biomass of seven dominant tree species in a tropical humid forest in Costa Rica. Biotropica 37(1):2-8.

More Related