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Locating and quantifying multiple landfills methane emissions using aircraft data.

D Gasbarra1, P Toscano2, D Famulari3

  • 1ISAFOM-CNR, Institute for Mediterranean Agricultural and Forest Systems, National Research Council, Via Patacca 85, 80056 Ercolano, NA, Italy; Department of Vegetal Biology, University of Napoli Federico II, Via Foria 223, 80139 Napoli, Italy.

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This summary is machine-generated.

This study quantifies methane (CH4) emissions from landfills using airborne measurements and dispersion modeling. The mass balance approach accurately estimated CH4 output, highlighting wind conditions

Keywords:
Airborne measurementsLandfill emissionMass balance

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Area of Science:

  • Environmental Science
  • Atmospheric Science
  • Geoscience

Background:

  • Landfills are significant sources of methane (CH4), a potent greenhouse gas.
  • Accurate quantification of CH4 emissions is crucial for climate change mitigation strategies.

Purpose of the Study:

  • To propose and assess a mass balance method for quantifying CH4 emissions from co-located landfills using airborne measurements and dispersion modeling.
  • To determine the contribution of individual landfills to the total CH4 emission.

Main Methods:

  • Airborne measurements of atmospheric CH4 densities and wind components at various heights.
  • Application of a steady-state Gaussian dispersion model to simulate CH4 concentration fields.
  • Utilizing a General Linear Model to attribute CH4 emissions to individual landfill sources.

Main Results:

  • The mass balance method showed good agreement with measured mass flows, particularly under steady wind conditions.
  • Total CH4 emissions from the landfill area ranged from 213.5 ± 33.5 to 317.9 ± 90.4 g/s.
  • Individual landfill contributions varied significantly (17.5 to 40.1 g/m² day⁻¹), reflecting differences in age and waste composition.
  • The method's validation against eddy covariance measurements showed an overall agreement within 20%.

Conclusions:

  • The proposed airborne mass balance approach is a viable method for quantifying landfill CH4 emissions.
  • Wind variability is a key factor influencing the accuracy of emission quantification.
  • Significant heterogeneity exists among landfills regarding their CH4 emission rates.