Sentences with phrase «shows increasing albedo»

As for recent albedo trends, earthshine data shows increasing albedo from 1999 to 2003 but little to no trend from 2003.

Not exact matches

Claquin et al's model - derived findings show a change in tropical atmospheric forcing of «-- 2.2 to — 3.2 W m — 2» between PI and LGM earth, due to the increased albedo of atmospheric dust.

Is there a discernible point, maybe in a model, that includes reduced albedo in the summer, that might show an acceleration of melting above the average temperature increase curve for the region so that ocean warmth has an increasing role over atmospheric??

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.

A substantial reduction in water vapor (shown below, from Lacis et al (2010) as well as increase in the surface albedo are important feedbacks here, showing that removing the non-condensing greenhouse gases (mostly CO2) in the atmosphere can collapse nearly the entire terrestrial greenhouse effect.

For example, I show in «The Tropical Thunderstorm Hypothesis» that the change from clear to cumulus conditions increases the albedo by about 60 w / m2, a large effect.

Water vapour is not only a highly potent GHG but it increase has also recently been shown to have a serious potential for reducing cloud formation in the tropics and thus advancing Albedo Loss.

«Kopacz et al. used a global chemical transport model to identify the location from which the BC arriving at a variety of locations in the Himalayas and the Tibetan Plateau originates, after which they calculated its direct and snow - albedo radiative forcings... they say that observations of black carbon (BC) content in snow «show a rapidly increasing trend,»... «emissions from northern India and central China contribute the majority of BC to the Himalayas,» and that «the Tibetan Plateau receives most BC from western and central China, as well as from India, Nepal, the Middle East, Pakistan and other countries.»»

A slight change of ocean temperature (after a delay caused by the high specific heat of water, the annual mixing of thermocline waters with deeper waters in storms) ensures that rising CO2 reduces infrared absorbing H2O vapour while slightly increasing cloud cover (thus Earth's albedo), as evidenced by the fact that the NOAA data from 1948 - 2008 shows a fall in global humidity (not the positive feedback rise presumed by NASA's models!)

Project Earthshine shows the albedo decreasing to 1998 and then increasing since perfectly matching the end of global warming in 1998 and the start of cooling after 1998.

High sensitivity is caused by increasing water vapour as the tropopause rises and diminishing low cloud cover, but the sensitivity decreases for still larger CO2 as cloud optical thickness and planetary albedo increase, as shown by Russell et al. [112].

The fact of the matter is that IPCC has relied in AR4 on models, which assume a strongly positive net feedback from clouds, while subsequent physical observations show that the primary impact of clouds with warming is increased albedo and higher SW reflection resulting in an overall negative cloud feedback.

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 ISCCP estimate (right) shows a decreasing albedo trend of 1 - 2 % in the 80s and 90s (as opposed to 7 - 8 % in the earthshine - based proxy), a small increase of 1 % form 1999 to 2001 and a flattening of the curve in the last three years.

A study of the Earth's albedo (project «Earthshine») shows that the amount of reflected sunlight does not vary with increases in greenhouse gases.