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Related Experiment Videos

Direct Radiative Forcing by Smoke from Biomass Burning

Hobbs1, Reid, Kotchenruther

  • 1P. V. Hobbs, J. S. Reid, R. A. Kotchenruther, R. J. Ferek, Department of Atmospheric Sciences, University of Washington, Seattle, WA 98195-1640, USA. R. Weiss, Radiance Research, Seattle, WA 98177, USA.

Science (New York, N.Y.)
|March 21, 1997
PubMed
Summary

Biomass burning smoke causes global cooling, with direct radiative forcing estimated at -0.3 W/m². This effect is smaller than warming from greenhouse gases but significant regionally, potentially impacting climate.

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Area of Science:

  • Atmospheric Science
  • Climate Science
  • Environmental Science

Background:

  • Biomass burning releases smoke particles into the atmosphere.
  • Smoke particles influence Earth's radiation balance and climate.
  • Understanding smoke's radiative forcing is crucial for climate modeling.

Purpose of the Study:

  • To assess the effects of biomass burning smoke on Earth's radiation balance.
  • To quantify the direct radiative forcing of global smoke emissions.
  • To compare smoke's climate impact with that of greenhouse gases.

Main Methods:

  • Airborne measurements of smoke optical parameters in Brazil.
  • Calculation of direct radiative forcing based on measured parameters.
  • Global-scale estimation of smoke's radiative impact.

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Main Results:

  • Global-mean direct radiative forcing from biomass smoke is estimated at -0.3 W/m² (cooling).
  • This cooling effect is significantly less than the warming from anthropogenic greenhouse gases (+2.45 W/m²).
  • Regional direct radiative forcing from smoke can be substantial.

Conclusions:

  • Biomass burning smoke exerts a net cooling effect on the global climate.
  • While globally modest, regional smoke impacts may indirectly influence global climate patterns.
  • Further research into regional effects and indirect forcing mechanisms is warranted.