Pollutant gas and
aerosol emissions levels in the reference scenario were checked for consistency by estimating regional surface particulate and ozone levels using the MOZART atmospheric chemistry model.
Not exact matches
The scientists expect further warming in the Arctic as
levels of greenhouse gases will continue to increase and
aerosol particle
emissions will likely decrease to combat air pollution in different parts of the world.
Toxins and nicotine have been measured in that
aerosol, such as formaldehyde, acetaldehyde, acetic acid and other toxins emitted into the air, though at lower
levels compared to conventional cigarette
emissions.
Compared to the past decades, the pattern (more
emissions in South Asia) and the relative forcings are completely different, with much less relative influence of
aerosols than today (due to faster increasing CO2
levels).
Compared to the past decades, the pattern (more
emissions in South Asia) and the relative forcings are completely different, with much less relative influence of
aerosols than today (due to faster increasing CO2
levels).
The second study meanwhile looked at how
aerosol emissions impact the Earth's temperature through a phenomenon the researchers call «transient climate sensitivity,» or how much of the Earth's temperature will change when the amount of carbon dioxide in the atmosphere reaches twice its
level during the pre-industrial times.
Levels of
aerosol emissions have soared since the 1950s, with the most common sources being power stations and cars.
While SO2
emissions may have had some small role in that period, they can't have a role in the current standstill, as the increase of
emissions in SE Asia is compensated by the decrease in
emissions in the Western world, thus there is hardly any increase in cooling
aerosols while CO2
levels are going up at record speed and temperatures are stalled.
«warming in the pipeline» usually assumes constant concentrations, not zero
emissions (though if CO2
emissions were dropped to zero tomorrow, and all other
emissions were held constant, I'd probably expect a little bit of warming before it turned over and started dropping) 2) Don't forget
aerosols: they are following the
Level 1 scenario from Wigley et al. 2009, and may actually dominate short - term temperature trends.
Nations collectively to begin to reduce sharply global atmospheric
emissions of greenhouse gases and absorbing
aerosols, with the goal of urgently halting their accumulation in the atmosphere and holding atmospheric
levels at their lowest practicable value;
Sulfate
aerosols wash out pretty quickly, so their current atmospheric concentration (and the resulting negative forcing) is mainly determined by the current
emissions levels.
The increase in oxidant
levels and preexisting
aerosol mass since preindustrial times is the reason of the burden change, since
emissions have not changed significantly.
Emissions scenarios were converted to projections of atmospheric GHG and
aerosol concentrations, radiative forcing of the climate, effects on regional climate, and climatic effects on global sea
level (IPCC, 2001a).