Sentences with phrase «atmospheric aerosol levels»

However, at present atmospheric aerosol levels are very low indeed, with the OD550 being lower than anytime in 30 + years.

Would you care to explain to me why you are confident about the estimates of atmospheric aerosol levels that are available for that period?

Using different instruments, satellites can measure atmospheric aerosol levels, ground elevations, and more.

Not exact matches

India, another huge source of atmospheric pollution, recently allowed European scientists to measure its high - level aerosols, an experiment that also includes flights into Nepal and Bangladesh.

Processes for which global - level boundaries can not yet be quantified are represented by gray wedges; these are atmospheric aerosol loading, novel entities, and the functional role of biosphere integrity.

In addition, many non-sulfur-based biogenic materials of the terrestrial environment play major roles as water - and ice - nucleating aerosols; and the airborne presence of these materials should also be enhanced by rising levels of atmospheric CO2.

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.

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;

The impact of the meteorite that wiped out the dinosaurs released vast amounts of CO2 from vaporising carbonate - rich rocks, pushing atmospheric CO2 levels up to approx 2,300 ppm resulting in a climatic forcing of +12 W - m -LRB--) 2 that would have been sufficient to warm the Earth's surface by 7.5 °C, in the absence of counter forcing by sulfate aerosols.

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 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!

These clouds then glaciate in higher levels, which could result in either more or less vigorous precipitation formation depending on the background aerosol levels and atmospheric stability (Khain et al., 2004).

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!

Perhaps, more relevant: an astronomer noted that during the period since 1995 when the brightness of the Full Moon is measured (he claims a good indicator of atmospheric volcanic aerosols) it has been at the highest levels since the 60s.

In collaboration with the Chinese Academy of Sciences, researchers provided molecular - level insights into how alpha - pinene, a compound emitted in large quantities by pine trees, helps form new atmospheric aerosols.

Brenty - The increased level of atmospheric sulfate aerosols from tropical volcanoes over the last decade, blocked sunlight reaching the Earth's surface, which has contributed to a very slight reduction in warming.

Global data on anthropogenic aerosols is poor to non-existent, but I would content that reductions in aerosols were a significant driver of low level cloud decreases over the 1975 to 2000 period, and hence atmospheric temperatures.

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).