Measurement of the Effect of Amazon Smoke on Inhibition of Cloud Formation

@article{Koren2004MeasurementOT,
  title={Measurement of the Effect of Amazon Smoke on Inhibition of Cloud Formation},
  author={Ilan Koren and Yoram J. Kaufman and Lorraine A. Remer and J. Vanderlei Martins},
  journal={Science},
  year={2004},
  volume={303},
  pages={1342 - 1345}
}
Urban air pollution and smoke from fires have been modeled to reduce cloud formation by absorbing sunlight, thereby cooling the surface and heating the atmosphere. Satellite data over the Amazon region during the biomass burning season showed that scattered cumulus cloud cover was reduced from 38%in clean conditions to 0%for heavy smoke (optical depth of 1.3). This response to the smoke radiative effect reverses the regional smoke instantaneous forcing of climate from –28 watts per square meter… 

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References

SHOWING 1-10 OF 51 REFERENCES

Direct Radiative Forcing by Smoke from Biomass Burning

TLDR
Airborne measurements in smoke from biomass burning in Brazil have yielded optical parameters that permit an improved assessment of the effects of smoke on Earth's radiation balance, and direct radiative forcing due to smoke can be large and might indirectly affect global climate.

Effects of Aerosol from Biomass Burning on the Global Radiation Budget

TLDR
An analysis is made of the likely contribution of smoke particles from biomass burning to the global radiation balance, which may add up globally to a cooling effect as large as 2 watts per square meter, comparable to the estimated contribution of sulfate aerosols.

Reduction of tropical cloudiness by soot

TLDR
An opposite mechanism through which aerosols can reduce cloud cover and thus significantly offset aerosol-induced radiative cooling at the top of the atmosphere on a regional scale is demonstrated.

Suppression of rain and snow by urban and industrial air pollution

  • Rosenfeld
  • Environmental Science, Physics
    Science
  • 2000
Direct evidence demonstrates that urban and industrial air pollution can completely shut off precipitation from clouds that have temperatures at their tops of about -10 degrees C over large areas.

Aerosols, Climate, and the Hydrological Cycle

TLDR
Human activities are releasing tiny particles (aerosols) into the atmosphere that enhance scattering and absorption of solar radiation, which can lead to a weaker hydrological cycle, which connects directly to availability and quality of fresh water, a major environmental issue of the 21st century.

A satellite view of aerosols in the climate system

TLDR
Increases in aerosol concentration and changes in their composition, driven by industrialization and an expanding population, may adversely affect the Earth's climate and water supply.

Climate Effects of Black Carbon Aerosols in China and India

TLDR
A global climate model used to investigate possible aerosol contributions to trends in China and India found precipitation and temperature changes in the model that were comparable to those observed if the aerosols included a large proportion of absorbing black carbon (“soot”), similar to observed amounts.

Aerosols, Cloud Microphysics, and Fractional Cloudiness

TLDR
Increases in aerosol concentrations over the oceans may increase the amount of low-level cloudiness through a reduction in drizzle—a process that regulates the liquid-water content and the energetics of shallow marine clouds—to contribute to a cooling of the earth's surface.

Global Air Pollution Crossroads over the Mediterranean

TLDR
The Mediterranean Intensive Oxidant Study, performed in the summer of 2001, uncovered air pollution layers from the surface to an altitude of 15 kilometers, causing air pollution standards to be exceeded throughout the region.

Large differences in tropical aerosol forcing at the top of the atmosphere and Earth's surface

TLDR
An observational method is presented for quantifying aerosol forcing to within ±5 per cent at the Earth's surface and the top of the atmosphere over the tropical northern Indian Ocean to imply that tropical aerosols might slow down the hydrological cycle.
...