Landfill methane emission: a case study using inversion methods, satellite and CRDS-based observations
This study uses in situ measurements, satellite data, and modeling techniques to investigate methane (CH 4 ) emissions from the Caieiras landfill in São Paulo, Brazil. Methane is the second most significant greenhouse gas due to its high heating potential. Previous studies have shown that landfills can be considered the super-emitters of methane. Quantifying its emissions is essential to comprehending the emissions patterns of this emitter, promoting an improvement in data from inventories. Multiple platforms were used to obtain the data and better characterize the landfill. Satellite data from TROPOMI and EMIT were analyzed during the present study to characterize emission feathers. The results showed consistent emissions over 4 years, as shown by the inversions obtained using TROPOMI data. EMIT could identify one plume originating in the landfill dispersed over the city’s populated area. The in situ data were acquired near the Caieiras landfill using a greenhouse gas analyzer with integrated off-axis cavity output spectroscopy (OA-ICOS), a high-precision method to measure gases in the atmosphere. Three campaigns were conducted in 2023 on February 14, July 6, and November 22. The results obtained in all three campaigns showed median concentration values above 2 ppm, reaching values close to 35 ppm. These data were integrated into the AERMOD dispersion model, combined with meteorological data, and estimated methane emission rates, revealing variability of concentrations, where emission rates were 12,974.4 kg/h, 11,284.92 kg/h and 23,472 kg/h, respectively, for 3 days of sampling. The integrated approach in this study promotes valuable insights into landfill emissions and emphasizes targeted strategies for mitigating greenhouse gases. Results support the elaboration of policies to enhance waste management and reduce the climate impact produced by waste.
Citação
@online{thaís_andrade_da2025,
author = {Thaís Andrade Da , Silva and Izabel Da Silva , Andrade and
Elaine Cristina , Araújo and Thaís , Corrêa and Mendes, Alex Carlos,
Pellegrinetti and Flávia Noronha Dutra , Ribeiro and Maria De Fátima
, Andrade and Eduardo , Landulfo},
title = {Landfill methane emission: a case study using inversion
methods, satellite and CRDS-based observations},
volume = {13},
date = {2025-04-01},
doi = {10.3389/feart.2025.1549385},
langid = {pt-BR},
abstract = {This study uses in situ measurements, satellite data, and
modeling techniques to investigate methane (CH 4 ) emissions from
the Caieiras landfill in São Paulo, Brazil. Methane is the second
most significant greenhouse gas due to its high heating potential.
Previous studies have shown that landfills can be considered the
super-emitters of methane. Quantifying its emissions is essential to
comprehending the emissions patterns of this emitter, promoting an
improvement in data from inventories. Multiple platforms were used
to obtain the data and better characterize the landfill. Satellite
data from TROPOMI and EMIT were analyzed during the present study to
characterize emission feathers. The results showed consistent
emissions over 4 years, as shown by the inversions obtained using
TROPOMI data. EMIT could identify one plume originating in the
landfill dispersed over the city’s populated area. The in situ data
were acquired near the Caieiras landfill using a greenhouse gas
analyzer with integrated off-axis cavity output spectroscopy
(OA-ICOS), a high-precision method to measure gases in the
atmosphere. Three campaigns were conducted in 2023 on February 14,
July 6, and November 22. The results obtained in all three campaigns
showed median concentration values above 2 ppm, reaching values
close to 35 ppm. These data were integrated into the AERMOD
dispersion model, combined with meteorological data, and estimated
methane emission rates, revealing variability of concentrations,
where emission rates were 12,974.4 kg/h, 11,284.92 kg/h and 23,472
kg/h, respectively, for 3 days of sampling. The integrated approach
in this study promotes valuable insights into landfill emissions and
emphasizes targeted strategies for mitigating greenhouse gases.
Results support the elaboration of policies to enhance waste
management and reduce the climate impact produced by waste.}
}