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The Planck response is the additional thermal radiation objects emit as they get warmer. Whether Planck response is a climate change feedback depends on the context. In climate science the Planck response can be treated as an intrinsic part of warming that is separate from radiative feedbacks and carbon cycle feedbacks.
The study of climate change taken on the scale of the entire history of the Earth. policies and measures (PaMs) phenology polar amplification Greater temperature increases in the Arctic than in the earth as a whole is a result of the collective effect of positive feedback loops and other processes. [2]
Climate change can also be used more broadly to include changes to the climate that have happened throughout Earth's history. [32] Global warming—used as early as 1975 [33] —became the more popular term after NASA climate scientist James Hansen used it in his 1988 testimony in the U.S. Senate. [34] Since the 2000s, climate change has ...
A 2-fold increase in CO 2 content changes the wavelengths ranges only slightly, and so this derivative is approximately constant along such an increase. Thus, a 2-fold increase in CO 2 content will reduce the radiation emitted by Earth by approximately: ln(2)*5 W/m 2 = 3.4 W/m 2. More generally, an increase by a factor c/c 0 gives: ln(c/c 0)*5 ...
An estimated value of ~ gives an increase in global temperature of about 1.6 K above the 1750 reference temperature due to the increase in CO 2 over that time (278 to 405 ppm, for a forcing of 2.0 W/m 2), and predicts a further warming of 1.4 K above present temperatures if the CO 2 mixing ratio in the atmosphere were to become double its pre ...
Sensitivity to atmospheric CO 2 increases is measured in the amount of temperature change for doubling in the atmospheric CO 2 concentration. [ 24 ] [ 25 ] Although the term "climate sensitivity" is usually used for the sensitivity to radiative forcing caused by rising atmospheric CO 2 , it is a general property of the climate system.
NASA GISS temperature trend 2000–2009, showing strong arctic amplification. Polar amplification is the phenomenon that any change in the net radiation balance (for example greenhouse intensification) tends to produce a larger change in temperature near the poles than in the planetary average. [1]
The rate at which a parcel of air changes temperature adiabatically as it moves vertically through the atmosphere. The parcel's moisture content affects this rate: as it rises, a parcel saturated with moisture cools more slowly than a dry parcel because the release of latent heat at the phase change between gas and liquid acts to buffer the ...