The phrase "upward flux" means the movement or flow of something going upward or rising.
Sentences with «upward flux»
On this particular point, one said:» The overall concluding statement that «the existence of a stable climate requires a unique surface upward flux density and a unique optical depth of 1.841» makes absolutely no sense at all. (realclimate.org)
Modtran indicates that maintaining constant clear sky upward flux after a doubling of CO2 (70 KM altitude, looking down, constant relative humidity) requires ~ 1.9 C higher surface temperature in the tropics but a bit less than 1C in the subarctic. (realclimate.org)
If it reverses, we can treat the value at the point of reversal (marking a maximum height or depth of the hill or valley in the net upward flux spectrum) as the saturation value, and then include some additional effect at the center of the band for additional increases in CO2 that have the opposite sign as the band widenning in their contributions to radiative forcing. (realclimate.org)