Environment & Energy
Related: About this forumNon-CO2 GHGs are rising 3.6x faster than CO2 itself
NOAA has just released its Annual Greenhouse Gas Index. It is an authoritative aggregation of all GHGs (CO2, CH4, N2O, CFC12, CFC11 and 15 minor GHGs) scaled for radiative forcing factors, and aggregated into a single number called CO2 equivalent or CO2e. This graph shows both the growth of CO2 alone and CO2e.
From this data we can derive the growth of the non-CO2 GHGs in ppm-equivalent, and compare the growth rate of those gases to the growth rate of CO2 itself. The results are "disturbing".
From 1979 to 2015:
- CO2 concentrations grew by 64 ppm, or 19%, at an average of 0.48% per year
- CO2e concentration grew by 39 ppm, or 86%, at an average of 1.75% per year
A linear trend indicates that CO2e concentrations could reach 560 ppm by 2040.
hatrack
(59,587 posts)How you doing, Paul?
GliderGuider
(21,088 posts)mackdaddy
(1,527 posts)All of these "trace" gases are warming the atmosphere and increasing the water vapor content which greatly amplifies the green house effect.
https://www.skepticalscience.com/water-vapor-greenhouse-gas.htm
I could not find the reference but i recently read that much less of this high water vapor is frozen than previously thought. Frozen or crystallized water vapor will reflect some of the incoming light energy and lowers global warming. But if the high vapor is not in crystal form then it lets the suns energy in and traps the heat and is a worse GHG.
I do not think that I have ever read one of these stories where the phrase "worse than previously thought" or the equivalent was not used.