Sentences with phrase «albedo decreased over»

Cloud amount and albedo decreased over mid-latitude oceans in both hemispheres (especially over the North Atlantic), over the southeast Indian Ocean, and in a northwest - to - southeast line stretching across the central tropical South Pacific.»

Not exact matches

I guess I am surprised that with better understanding of the importance of water vapor feedback, sulfate aerosols, black carbon aerosols, more rapid than expected declines in sea ice and attendant decreases in albedo, effects of the deposition of soot and dust on snow and ice decreasing albedo, and a recognition of the importance of GHGs that were probably not considered 30 years ago, that the sensitivity has changed so little over time.

I guess I am surprised that with better understanding of the importance of water vapor feedback, sulfate aerosols, black carbon aerosols, more rapid than expected declines in sea ice and attendant decreases in albedo, effects of the deposition of soot and dust on snow and ice decreasing albedo, and a recognition of the importance of GHGs that were probably not considered 30 years ago, that the sensitivity has changed so little over time.

I should have been more accurate — the presentation says «reversibility suggests natural variations» and I presume this is because over the period 1984 - 2003 the albedo is seen to both decrease and increase and there is an assumption that an anthropogenic variation would be one - way.

So for example deglaciation warmed global mean temps by about 5 C over 10k years with a radiative forcing of about 6.5 W / m2 (total of both GHG increases and albedo decreases).

This implies that the CRF levels must have systematically decreased over time, causing a long - term decrease in the low cloud fraction and hence a long - term reduction in the planetary albedo, that again would be responsible for the warming.

If CO2 in the Anthropocene atmosphere contributes to re-vegetating currently arid areas as it did post-LGM, we should expect an even greater warming feedback from CO2 than is assumed from water vapor and albedo feedbacks, due to decreased global dust - induced albedo and increased water vapor from transpiration over increased vegetated area.

The idea was that the arctic did not freeze over, leading to more water uptake, and massive snows that decreased albedo.

Albedo from medium / low level clouds warms or cools the ocean surface by increasing or decreasing over time across the global surface.

For instance, Han et al. (1998) showed that cloud albedo decreases with decreasing droplet size for the optically thinner clouds over the oceans.

In this new study, the researchers showed that increasing the albedo of a 1m2 surface by 0.01 would have the same effect on global temperature, over the next 80 years, as decreasing emissions by around 7 kg of CO2.

All of this will be over by 2015, when the records of 2010 and 1998 will have been obliterated by increased solar activity, ENSO and decreased albedo as we go into virtually ice free arctic summers, oh and increased GHG concentrations of course.

Palle et al (cited elsewhere here) have shown that the total albedo has decreased over the period 1985 - 2000, while cloud cover also decreased (resulting in global warming), and has reversed itself since then, with increased cloud cover.

The Berkeley Lab study found that global land surface temperature decreased by a modest amount — an average of roughly 0.01 degrees Celsius, based on an albedo increase of.003 averaged over all global land surfaces.

Averaged over the globe, this albedo decrease corresponds to a forcing that is 25 % as large as that due to the change in CO2 during this period, considerably larger than expectations from models and other less direct recent estimates.