Estimation of Carbon Stocks and Changes and Data Sources

The main goal of carbon inventory projects and programmes is to estimate carbon stocks and changes in those stocks annually or at different times. Chapters 10-13 described the methods for measuring and monitoring different indicator parameters from which carbon stocks in different carbon pools can be estimated. The next step is to estimate the carbon stocks and changes, using the parameters measured and monitored in the field and in the laboratory. The analysis and calculation of carbon stocks and changes involve conversion of field and laboratory estimates of various parameters from sample plots, such as diameter at breast height (DBH), height and soil organic carbon content, into tonnes of carbon per hectare per year or over several years using different methods and models. The carbon pools for which the stocks are to be estimated are

(i) Above-ground and below-ground biomass

(ii) Deadwood and litter

(iii) Soil organic carbon

The estimates of carbon stocks and changes are required by different stakeholders for different applications at different periods and frequency intervals (Chapter 3):

• CDMproject developers and implementing agencies require the estimates annually as well as over a period of years, usually 3-5 years, in terms of tonnes of carbon per hectare and for the project area.

• Roundwood or industrialwood production managers require estimates of commercial timber production in tonnes or cubic metres per hectare and for the full plantation at the end of rotation period.

• Community forestry producers require production estimates of fuelwood and timber in terms of tonnes or cubic metres per hectare over varying time spans.

• Tree growers or farmers need periodical estimates of tonnes of fuelwood and cubic metres of timber per hectare.

• National greenhouse gas inventory agencies require estimates of emissions and removals of carbon dioxide, in tonnes, from different land-use categories for a given inventory year or on an annual basis.

This chapter presents methods and procedures for calculating carbon stocks and changes in the stocks of different carbon pools.

17.1 Above-Ground Biomass of Trees

Above-ground biomass of trees includes commercial (or merchantable) timber and total tree biomass, which includes not only commercial timber, but also twigs, branches and bark, expressed as tonnes of oven-dried biomass. The field methods for estimating above-ground biomass are described in Chapter 10.

Project Management Made Easy

Project Management Made Easy

What you need to know about… Project Management Made Easy! Project management consists of more than just a large building project and can encompass small projects as well. No matter what the size of your project, you need to have some sort of project management. How you manage your project has everything to do with its outcome.

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