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Environmental Health East Brunswick, New Jersey, United States
Continuous monitoring finds landfill methane estimates can miss major peaks
What happened
A Columbia University-led study used a monitoring tower to measure methane continuously near a New Jersey landfill for two and a half years. Researchers found that 2023 emissions at the site were about five times a previous estimate and varied strongly with season and air pressure, with early-winter peaks that short sampling campaigns could miss.
Why it matters
Methane traps far more heat than carbon dioxide over the short term, and landfills are a significant controllable source. Continuous measurements can reveal when collection systems underperform and give operators better information for maintenance, capture, and transparent reporting.
What to watch
- Whether regulators require longer-term or continuous monitoring at more landfills.
- How operators adjust gas collection during cold weather and low-pressure conditions.
- Additional site studies before applying this landfill's fivefold result more broadly.
Sources & evidence
- Long-term landfill monitoring finds methane emissions higher than estimatesColumbia University report published by Phys.org on August 5, 2026, describing continuous measurements, seasonal variation, and limits on generalizing from one landfill.
- Environmental Science & Technology studyPeer-reviewed research article reporting the multi-year landfill methane measurements.
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