Seasonal landfill methane emissions driven by temperature and pressure

More than a quarter of anthropogenic global warming has been attributed to methane growth in the atmosphere. Landfills account for 17 % of estimated methane emissions in the United States of America (USA), according to the Environmental Protection Agency (EPA), but studies show that many landfills emit more than reported. We developed a novel method to calculate monthly methane emissions from an active landfill using atmospheric methane mixing ratios observed from a single tower in New Jersey, USA. The tower method provides two and a half years of semi-continuous measurements and therefore observes more of the variability of methane emissions and lacks the sampling bias present in other methods. Time-specific comparison of tower-based methane emissions against those observed from summertime aircraft sampling and year-round mobile ground-based platforms showed good agreement. Estimated methane emissions for 2023 were five times greater than those reported to the EPA. We observed a strong..., , # Seasonal landfill methane emissions driven by temperature and pressure

Dataset DOI: [10.5061/dryad.ghx3ffc34](https://doi.org/10.5061/dryad.ghx3ffc34)

## Description of the data and file structure

The file tower_observations_30s contains the 30-second merged dataset for all observations at the PAMS tower site (40.46228, -74.42932) taken at 20 m height above ground level. Gas concentration data were calibrated and merged to 30-seconds using the calibration method described in the associated manuscript. Wind data have a native 30-second resolution, while insolation has a native 1-minute resolution. PBL height comes from NOAA’s hourly High Resolution Rapid Refresh model, and atmospheric pressure and temperature are measured every 5 minutes. Those values have been linearly interpolated to the 30-second resolution of the wind measurements. Data from the New Jersey Mesonet site in East Brunswick, NJ (40.473318, -74.393765) are also provided. These have a native 5-minute resolution and co...,