IPCC list of greenhouse gases
This is a list of the most influential long-lived, well-mixed greenhouse gases, along with their tropospheric concentrations and direct radiative forcings, as identified by the Intergovernmental Panel on Climate Change (IPCC). Abundances of these long-lived gases are regularly measured by atmospheric scientists from samples that are collected throughout the world. Since the 1980s, the annual forcing contributions of these gases are also estimated with high accuracy using IPCC-recommended expressions derived from radiative transfer models. This list excludes: Combined Summary from IPCC Assessment Reports (TAR, AR4, AR5, AR6). "Mole fractions: "μmol/mol  = ppm = parts per million (10); nmol/mol = ppb = parts per billion (10); pmol/mol = ppt = parts per trillion (10)." Gases from IPCC Fourth Assessment Report. The following table has its sources in Chapter 2, p. 141, Table 2.1. of the IPCC Fourth Assessment Report, Climate Change 2007 (AR4), Working Group 1 Report, The Physical Science Basis. Gases from IPCC Third Assessment Report. The following table has its sources in Chapter 6, p. 358, Table 6.1. of the IPCC Third Assessment Report, Climate Change 2001 (TAR), Working Group 1, The Scientific Basis. IPCC list of