Locating and quantifying multiple landfills methane emissions using aircraft data
| Autor: | D. Gasbarra a, c, P. Toscano b, D. Famulari a, S. Finardi d, P. Di Tommasi a, A. Zaldei b, P. Carlucci e, E. Magliulo a, B. Gioli b |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Methane emissions
Aircraft 010504 meteorology & atmospheric sciences Health Toxicology and Mutagenesis Gaussian Eddy covariance aircraft landfills methane emissions mass budgets Flux Wind 010501 environmental sciences Toxicology Atmospheric sciences 01 natural sciences Methane symbols.namesake chemistry.chemical_compound Dispersion (water waves) 0105 earth and related environmental sciences Air Pollutants General Medicine Atmospheric dispersion modeling Pollution Refuse Disposal Waste Disposal Facilities Volume (thermodynamics) chemistry Linear Models symbols Environmental science Environmental Monitoring |
| Zdroj: | Environmental pollution (1987) 254 (2019). doi:10.1016/j.envpol.2019.112987 info:cnr-pdr/source/autori:D. Gasbarra a, c, *, P. Toscano b, D. Famulari a, S. Finardi d, P. Di Tommasi a, A. Zaldei b,P. Carlucci e, E. Magliulo a, B. Gioli b/titolo:Locating and quantifying multiple landfills methane emissions using aircraft data/doi:10.1016%2Fj.envpol.2019.112987/rivista:Environmental pollution (1987)/anno:2019/pagina_da:/pagina_a:/intervallo_pagine:/volume:254 |
| DOI: | 10.1016/j.envpol.2019.112987 |
| Popis: | A mass balance approach to quantify methane (CH4) emission of four co-located landfills by means of airborne measurements and dispersion modelling was proposed and assessed. By flying grids at different heights above the landfills, atmospheric CH4 densities and wind components were measured along the edges and inside the study atmospheric volume, in order to calculate mass flows in the along- and across-wind directions. A steady-state Gaussian dispersion model was applied to build the concentration fields associated to unit emission from each landfill, while the contribution of each one to the total emission was assessed using a General Linear Model approach, minimizing the difference between measured and modeled mass flows. Results showed that wind spatial and temporal variability is the main factor controlling the accuracy of the method, as a good agreement between measured and modeled mass flows was mainly found for flights made in steady wind conditions. CH4 emissions of the entire area ranged from 213.5 ± 33.5 to 317.9 ± 90.4 g s−1 with a mean value of 252.5 ± 54.2 g s−1. Contributions from individual sources varied from 17.5 to 40.1 g m−2 day−1 indicating a substantial heterogeneity of the different landfills, which differed in age and waste composition. The proposed method was validated against tower eddy covariance flux measurements made at one of the landfills, revealing an overall agreement within 20%. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|