Today radiative forcing is being increased due to the radiative forcing effects of our civilization's activities that emits greenhouse gases and aerosols. The GHG emissions and black carbon (soot) aerosol absorb and retain heat radiating from the planet surface. There is one cooling emission, which is air pollution acid sulfate emitted from fossil fuel combustion. Other human activities are clearing forests, and in doing so emit CO2 as well as eliminating annual CO2 uptake of the forest. The global surface warming melts snow and ice, which by their albedo effect of reflecting in coming solar energy back out to space, reduce the RF. As the area of snow, glaciers, sea ice and ice sheets declines so does the planet's albedo and the RF increases.
The different greenhouse gases have different strengths of radiative forcing.
The vast majority of the added GHG heat has gone to ocean heat, simply because the oceans are 99% of the global environment living space for life. The global surface warming is a relatively small amount of heat that gets left over. So the heat content of the oceans is a much better atmospheric GHG indicator than global warming (alone) and correlates directly with the planet RF.
The RF can be used to calculate the RF contribution from different countries