Sentences with phrase «increasing aerosol»

At the same time, mankind has been increasing aerosol particle production by emitting various gases into the atmosphere, and these have been cooling the planet.

Post 1940 was likely due to increasing aerosol emissions due to rapid industrialization.

The latter effect acts to reduce CO2 sensitivity by increasing the aerosol - sensitive SW tau, increasing both cloud density and cover, decreasing upper tropospheric specific humidity and SW albedo and will increasingly do so as the atmospheric level of CO2 rises!

In turn, China is recording ever increasing aerosol concentrations (though with slightly higher AAOD / AEOD ratios), culminating in the last decade as apparent in the (modelled) GOCART AOD for 2005 - 07.

The latter effect acts to reduce CO2 sensitivity by increasing the aerosol - sensitive SW tau, increasing both cloud density and cover, decreasing upper tropospheric specific humidity and INCREASING SW albedo and will increasingly do so as the atmospheric level of CO2 rises!

Although the nominal negative GACP AOT trend could partially be an artifact of increasing aerosol absorption, we argue that the time dependence of the GACP record, including the latest flat period, is more consistent with the actual decrease in the tropospheric AOT.

Becuase of the exponential dependence of the backscattering, the rate of temperature decrease is augmented with increasing aerosol content.

tempterrrain, agreed, this is an underestimate by neglecting lag in an accelerating forcing, and neglecting possibly further increasing aerosol effects.

A few locations over land exhibit weak cooling over this time, perhaps a signature of the effects of increasing aerosol particles due to combustion and biomass burning, or a result of changes in land use.

«Recent satellite observations, however, have yielded contradictory results: LWP can decrease with increasing aerosol loading.

So the whole basis for the study is flawed — its based on the affect of increasing aerosol concentrations that actually are not increasing.

An increasing aerosol load due to human activities decreases regional air quality and the amount of solar radiation reaching the Earth's surface.

You can make them go down just as easily by increasing that aerosol forcing within it's uncertainty bounds and the earlier «ice - age» model projections did exactly that — using surface temperature as a target.

The results, said co-author and PNNL laboratory fellow Ruby Leung, «strongly suggest that increasing aerosol concentrations (particles, mainly soot and sulfur, that pollute the air) in the past has produced a fog - like haze that has reduced solar radiation (surface heat from sunshine), despite more frequent clear days that should lead to increased solar radiation.»

On the other hand, «if some volcanoes that are large enough go off and if they are the dominant cause [of increasing aerosols], then we will probably see some increases» in cooling.

Burning fossil fuels increases aerosol concentrations in the atmosphere.

«The 1991 volcanic eruptions will substantially increase the aerosol loading within the polar vortex for 1992, both below and above 20 kilometres,» the team predicts.

A 2013 computer simulation of this process found increased aerosols alone did result in more lightning due to ice crystal collisions, although at very large aerosol volumes the effect was muted.

Ideas that we should increase aerosol emissions to counteract global warming have been described as a «Faustian bargain» because that would imply an ever increasing amount of emissions in order to match the accumulated GHG in the atmosphere, with ever increasing monetary and health costs.

Perhaps you are unaware of the progress that has been made in attribution during these periods to a combination of lower volcanism, increased insolation and increased greenhouse warming in the former period and to increased aerosols from fossil fuel burning in the latter.

SW fails to mention effects that may counter-act warming trends, such as irrigation, better shielding of the thermometers, and increased aerosol loadings, in addition to forgetting the fact that forests were cut down on a large scale in both Europe and North America in the earlier centuries.

Thus, the case for the cooling from 1940 to 1970 being caused by increased aerosols is not supported by the available measurements.

The cool phase of the PDO with a little kicker of a sleepy sun and increased aerosols has been a head - fake that movtivated «skeptics» have jumped on.

If all of the cooling in the usa from 1950 to 1975 is caused by increasing aerosols (Schneider et al) then all of the warming since 1975 is caused by decreasing aerosols.

One theory is the decline in temperature from 1940 to 1970 was due to increased aerosols from pollution that caused a negative feedback.

Is the 1940 - 1970 MRES smoothing for increased aerosols a convenient fit or are there empirical data to support it?

25 Fig. 20 - 6, p. 469 Troposphere Cooling from increase Aerosols Warming from decrease Green - house gases CO2 removal by plants and soil organisms CO2 emissions from land clearing, fires, and decay Heat and CO2 emissions Heat and CO2 removal Deep ocean Long - term storage Land and soil biotoa Natural and human emissions Shallow ocean Sun Ice and snow cover

In particular, I think it would be interesting to use a complex atmospheric chemistry component to allow for spatial variation in the forcing reduction through sulphate aerosols: increase the aerosol optical depth over one source country, for example, and let it disperse over time.

In the short - term, coal increases aerosols and causes a negative forcing on the climate.

However, different agents of climate change can have positive (example, increasing greenhouse gases) and negative (increasing aerosols) contributions.

As it turns out, forcings that have tended to cause cooling, like increased aerosol pollution, are particularly efficient.

Scientific term ##### Public meaning ##### Better choice enhance ######### improve ########## intensify, increase aerosol ########## spray can ######### tiny atmospheric particle positive trend ####### good trend ####### upward trend positive feedback ##### good response, praise ##### vicious cycle, self - reinforcing cycle

Greenhouse gas forcing is expected to increase the interhemispheric SST gradient and thereby increase Sahel rainfall; hence, the recent Sahel drought has been attributed to increased aerosol loading cooling the Northern Hemisphere (75).

There has been AGW from increased aerosols (Sagan got that wrong too, along with lapse rate physics).

enhance improve, intensify increase aerosol spray can tiny atmospheric particle positive trend good trend upward trend positive feedback good response, praise vicious cycle, self - reinforcing cycle

This undoubtedly contributed to the warming of the 1980 - 2000 period in the troposphere, just as the current cool PDO, along with the sleepy sun and increased aerosols are dampening the rise.

chriskoz @ 4 - could be due to increased aerosol emissions, or the transition to Argo data, or something else.

«The cooling impact from increasing aerosols more than masked the warming impact from increasing greenhouse gases,» said John Fyfe, a senior scientist at Environment and Climate Change Canada and a co-author of the new study accepted for publication in Geophysical Research Letters.

Third: There was no cooling in the 1920s; in fact that was the start of a multidecadal warming trend that lasted until just after World War II (followed by a brief cooling trend, possibly due to increased aerosols dimming incoming sunlight together with some pretty big volcanic eruptions which did the same thing).

It would imply that the CO2 forcing of near 2 W / m2 has already all been balanced by something, presumably a combination of increased aerosols, increased surface temperature, reduced other GHGs, increased clouds, increased surface albedo, and / or a weaker sun.

«Geoengineering for global warming: Increasing aerosols in atmosphere would make sky whiter.»

Steve Ghan, from the Pacific Northwest National Laboratory, says, «This work confirms what previous cloud modelling studies had suggested: that although clouds are influenced by many factors, increasing aerosols enhances the variability of precipitation, suppressing it when precipitation is light and intensifying it when it is strong.

Those that have argue for increasing aerosols and their benevolent haze (see Nature 1077 - 1078, 30 April 2009).

Not exact matches

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The movement away from a traditional aerosol can not only improves the user experience by increasing efficiency and lowering weight but also demonstrates responsible packaging by replacing a potentially hazardous can with a pouch that can be disposed of in the regular waste stream.

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China «could cause some decreases [in stratospheric aerosols] if that is the source,» Neely says, adding that growing SO2 emissions from India could also increase cooling if humans are the dominant cause of injecting aerosols into the atmosphere.

The question is: why the increase in such aerosols?

Determining whether humans or volcanoes explain more of the increase in stratospheric aerosols is the focus of ongoing research, says PhD candidate Ryan Neely of the University of Colorado, who contributed to the NOAA research.

One aerosol, black carbon, is of increasing concern for Arctic nations worried about the pace of climate change in the far north, which is warming twice as fast as the global average.