Chapter 3: Uncertainties (2019 Refinement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories)

This chapter provides guidance on estimating and reporting uncertainties associated with both annual estimates of emissions and removals, and emission and removal trends over time. It also explains why uncertainty assessment is a useful means of improving emission inventories. This guidance is written primarily for inventory compilers and provides, with examples, two approaches for combining category uncertainties into uncertainty estimates for total national net emissions and trends.

This is the 2019 refinement to the IPCC 2006 Guidelines on National Greenhouse Gas Inventories.