What is radiation forced?
Earth receives energy from the Sun, mostly in the form of light, some of which are absorbed and warmed by the planet, causing it to emit energy in the form of heat or infrared radiation, and results in a balance between incoming and outgoing energy. The amount of absorbed sunlight affects different factors and speed at which the energy is emitted. If these factors remain constant for a period of time, the energy flows will be expected to settle in balance at a specific average annual temperature, with the same number of energy. If any of these factors have changed, this may result in mismatch between incoming and outgoing energy, which will lead to a total increase or decrease in global average temperatures. The general definition of radiation forced is the degree of change, positive or negative, to this balance and is usually expressed in watts per square meter (w/m
2 ).
in the Context of Climate Change, and More Specific Definition of Radiative Forcing - AgreEd Upon by the Intergovernmental Panel on Climate Change According to the IPCC, Using 1750 AS and Baseline Date Representative of Pre-Industrial Times, The Overall Radiative Forcing Value Was Estimated to Be +1.6 W/M 2 As of 2007. Natural factors include changes in the power of sun and dust energy in the atmosphere produced by volcanic eruptions. IT IS, However, The Man-Made Factors That Are of Most Concern: There Is Widespread Agreement That Human Activities Are Contributing to Positive Radiative Forcing, Leading to An Overall Global Incime in Temperatures.
Burning fossil fuels from the industrial revolution HJAK increased a number of certain gases, especially carbon dioxide (CO 2 ), and aerosols such as smoke and soazing particles, in the atmosphere.The effects of what 2 are well understood. It is basically transparent sunlight, but absorbs infrared, so even if it allows solar energy, it prevents external radiation, resulting in positive radiation forces. It is estimated that the levels of atmospheric CO 2 increased from approximately 270 parts to a million (PPM) in pre -industrial times to nearly 390 ppm in 2010.
Aerosol radiation forces is more difficult to quantify because different aerosols differ in their transparency, reflectivity and absorption with regard to light and heat. In general, soot and smoke particles will tend to absorb heat and contribute to a positive radiation forced, while more reflective aerosols such as sulphate combustion result may have a negative effect. Estimates of aerosoluration are complicated by the fact that they can also reduce the amount of sunlight reaching the surface.