Sentences with phrase «brown aerosol clouds»

Not exact matches

The net effect of human - generated aerosols is more complicated and regionally variable — for example, in contrast to the local warming effect of the Asian Brown Cloud, global shipping produces large amounts of cooling reflective sulphate aerosols: http://www.sciencedaily.com/releases/1999/08/990820022710.htm

Methane seems to be picking up a bit, but then again, given the Asian Brown Cloud, so should the negative effects of reflective aerosols.

However, there is a price of sorts — while locally the Asian Brown Cloud amplifies the greenhouse effect, globally it masks the greenhouse effect due to the aerosol - induced global dimming.

So the next question is whether that'd moderate direct surface heating since the brown clouds are actually net heat traps, or what that'd do for T - storm strength (although the N. Pacific is seeing unusually big winter T - storms from aerosol cloud seeding).

In reality, there are a host of both natural and anthropogenic aerosols, ranging from sea salt (the major source of cloud nuclei over the ocean) to biogenic aerosols from forests (the «smoke» of the Great Smoky Mountains of the Eastern US) to partially burnt organic materials (the «brown cloud» over Asia, generally absorptive / warming) to various sulfur compounds (generally reflective / cooling).

Brown clouds contain dark aerosols such as soot that are released into the atmosphere by burning organic matter.

I thought I read a few findings that showed that aerosols actually had an overall warming effect rather than a cooling one (brown cloud over Asia raising temps).

So when you mix the two kinds of aerosol pollution up in the Asian brown cloud, one would expect climate effects to even out.

We always thought that — apart of course from soot [15 % of climate warming]-- such aerosol pollution creates cooling — as in the case of Chinese sulfur pollution and the Asian (Indian) brown cloud — and that air quality measures over recent decades in North America and Europe are now actually a major cause of increased warming speeds there — as the actual temperature catches up on the «CO2 baseline».

Aerosol collections on the NOAA Ron Brown for subsequent processing of INP activation temperature spectra and composition analyses, add a valuable measurement to the ACAPEX and related CalWater2 (NOAA) studies for use in parameterizing and modeling the impacts of marine boundary layer and other aerosols on climate and radiation via aerosol - indirect effects on mixed phase Aerosol collections on the NOAA Ron Brown for subsequent processing of INP activation temperature spectra and composition analyses, add a valuable measurement to the ACAPEX and related CalWater2 (NOAA) studies for use in parameterizing and modeling the impacts of marine boundary layer and other aerosols on climate and radiation via aerosol - indirect effects on mixed phase aerosol - indirect effects on mixed phase clouds.

Eli: The real issue with BC forcing is that it is not global, but intensely local, depending not only on emissions (Asian brown cloud) but also absorptions (Greenland darkening) I guess the question for me is, are there any aerosol forcings that are truly global?

We all know about the brown cloud episodes but that region (a very rainy one at that) can't possibly be one of the largest «pools» of negative aerosol RF.

Because of the combination of high absorption, a regional distribution roughly aligned with solar irradiance, and the capacity to form widespread atmospheric brown clouds in a mixture with other aerosols, emissions of black carbon are the second strongest contribution to current global warming, after carbon dioxide emissions.

You could also ask Andrew Revkin to withdraw his still - standing claim that most of the aerosols in atmospheric brown clouds are due to biomass burning.

Indeed, he draws a distinction between the darker - colored aerosols — such as those found in the brown clouds — and lighter - colored ones which don't absorb solar energy.

Topics that I work on or plan to work in the future include studies of: + missing aerosol species and sources, such as the primary oceanic aerosols and their importance on the remote marine atmosphere, the in - cloud and aerosol water aqueous formation of organic aerosols that can lead to brown carbon formation, the primary terrestrial biological particles, and the organic nitrogen + missing aerosol parameterizations, such as the effect of aerosol mixing on cloud condensation nuclei and aerosol absorption, the semi-volatility of primary organic aerosols, the importance of in - canopy processes on natural terrestrial aerosol and aerosol precursor sources, and the mineral dust iron solubility and bioavailability + the change of aerosol burden and its spatiotemporal distribution, especially with regard to its role and importance on gas - phase chemistry via photolysis rates changes and heterogeneous reactions in the atmosphere, as well as their effect on key gas - phase species like ozone + the physical and optical properties of aerosols, which affect aerosol transport, lifetime, and light scattering and absorption, with the latter being very sensitive to the vertical distribution of absorbing aerosols + aerosol - cloud interactions, which include cloud activation, the aerosol indirect effect and the impact of clouds on aerosol removal + changes on climate and feedbacks related with all these topics In order to understand the climate system as a whole, improve the aerosol representation in the GISS ModelE2 and contribute to future IPCC climate change assessments and CMIP activities, I am also interested in understanding the importance of natural and anthropogenic aerosol changes in the atmosphere on the terrestrial biosphere, the ocean and climate.