Figure : indicator-annual-greenhouse-gas-index-2020

Annual Greenhouse Gas Index

Figure 1

This figure appears in the Indicator: Annual Greenhouse Gas Index report.

Radiative forcing (shown on the left vertical axis) is the change in the amount of solar radiation, or energy from the sun, that is trapped by the atmosphere and remains near Earth. When radiative forcing is greater than zero, it has a warming effect; when it is less than zero, it has a cooling effect. In this indicator, radiative forcing from long-lived greenhouse gases is shown relative to the year 1750. The AGGI (shown on the right vertical axis) is an index of radiative forcing normalized to the year 1990 (represented by a red dot); it shows that the warming influence of long-lived greenhouse gases in the atmosphere increased by 45% between 1990 and 2019.

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The time range for this figure is January 01, 1979 (00:00 AM) to December 31, 2019 (00:00 AM).

This figure was created on November 13, 2017.

This figure was submitted on June 29, 2020.

The spatial range for this figure is -90° to 90° latitude, and -180° to 180° longitude.

This figure was derived from table 1: indicator-annual-greenhouse-gas-index-2020

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