Sentences with phrase «aerosol emissions»
Aerosol emissions refer to tiny particles or droplets that are released into the air, often as a result of human activities or natural processes. These particles can be solid or liquid and can come from sources like vehicle exhaust, industrial processes, or even volcanic eruptions. Aerosol emissions are important to study because they can have various impacts on human health, climate patterns, and air quality. Full definition
We have recently discussed several papers which have found substantial global dimming as a result of increased human aerosol emissions from 1950 to 1980 and 2000 to 2010.
skepticalscience.com
They used climate model simulations that took into account the changes in aerosol emissions.
Experts said certain types of aerosol emissions cause a strange cooling effect to the climate by blocking solar radiation from reaching the surface of our planet.
The sections below give a systematic overview of the major natural aerosol sources and their relations to climate parameters while anthropogenic aerosol emissions and combined aerosols are the subject of Chapter 2.
They used computer - based climate models to quantify the impact of increasing aerosol emissions and greenhouse gases over the same period.
Due to the health problems caused by aerosols, many developed countries have been reducing aerosol emissions by industry.
Moreover, most aerosol emissions only stay in the atmosphere for a few days.
We find a higher sensitivity of extreme events to aerosol reductions, per degree of surface warming, in particular over the major aerosol emission regions.
A recent paper suggested that volcano aerosol emissions were to blame for a lack expected warming over the last decade or so.
There is a fairly large degree of uncertainty in these figures, primarily because the magnitude of the cooling effect from human aerosol emissions is not well known.
Here we show the climate impacts from removing present - day anthropogenic aerosol emissions and compare them to the impacts from moderate GHG - dominated global warming.
Hienola, A., Partanen, A. - I., Pietikäinen, J. - P., O'Donnel, D., Korhonen, H., Matthews, D., and Laaksonen, A.: The impact of aerosol emissions on the 1.5 °C pathways, Environ.
HS11 discussed that it would be best to treat natural aerosol emissions as a fast feedback rather than a forcing.
Professor Sybren said: «It can be excluded, however, that this hiatus period was solely caused by changes in atmospheric forcing, either due to volcanic eruptions, more aerosols emissions in Asia, or reduced greenhouse gas emissions.
«Our findings underscore the importance of quantifying and characterizing region - specific, cultural combustion activities to enhance existing aerosol emission budgets and climate models,» Chakrabarty said.
We basically accelerated the climate increase by cutting aerosol emissions - ironic.
Partanen, A. - I., Landry, J. - S., and Matthews, H. D.: Climate and health implications of future aerosol emission scenarios, Environ.
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.
However, the combined climate effect of GHG and aerosol emissions over the industrial era is poorly constrained.
If we are seeing changes to the tropopause temperatures as an indirect impact from increased Asian aerosol emissions or solar - driven ozone changes, then this might be better thought of as impacting the efficacy of those forcings rather than implying some sensitivity change.
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.
Carbonaceous aerosol emission inventories suggest that approximately 34 to 38 % of emissions come from biomass burning sources and the remainder from fossil fuel burning sources.
Such as aircraft aerosols emissions, the Hamatan (movement of Sahara dust clouds over Africa â??
Scientists have already linked aerosol emissions to increases in lightning over areas of the Amazon prone to forest fires (pdf) as well as regions of China with thick air pollution.
Titled «Initiation of Snowball Earth with volcanic sulfur aerosol emissions,» the study posits a hypothesis by two researchers from Harvard University's John A. Paulson School of Engineering and Applied Sciences (SEAS).
Christy is correct to note that the model average warming trend (0.23 °C / decade for 1978 - 2011) is a bit higher than observations (0.17 °C / decade over the same timeframe), but that is because over the past decade virtually every natural influence on global temperatures has acted in the cooling direction (i.e. an extended solar minimum, rising aerosols emissions, and increased heat storage in the deep oceans).
Long story short: because aerosol emissions «masked» a great amount of warming, some scientists believe that estimates of our planet's transient climate sensitivity are too low, and that climate may be more sensitive to carbon emissions than what we know.
Since warming can accelerate as we remove aerosols, we've been inadvertently geoengineering for decades with aerosol emissions.
In the opposite transition to rapid warming in 1975, once again I am struck by the fact that while aerosol emissions ceased to rise, they did not disappear entirely from the atmosphere, but began a gradual decline from a high peak.
The bottom map shows aerosol emissions from ships crossing routes in the Indian Ocean and South China sea from 2010.
Simulating natural and humanmade climate drivers, scientists showed that the decline in rainfall is primarily a response to humanmade increases in greenhouse gases as well as a thinning of the ozone caused by humanmade aerosol emissions.
Li said the study's findings should further spur countries like China and India to cut aerosol emissions so they reduce pollution and thereby increase their solar electricity generation more rapidly, in addition to the already known health benefits.
The amount of warming caused by CO2 might have been masked over the years by accompanying aerosol emissions.
«Our findings,» write the authors, «suggest that anthropogenic aerosol emissions influenced a range of societally important historical climate events such as peaks in hurricane activity and Sahel drought.»
From the 1940s to the 1970s, human - induced aerosol emissions were the dominant forcing factor which led to a slight global (and U.S.) cooling in this period.