Satellite and atmospheric data resolve causes of record 2020 methane increase
By
Xueying Yu
Summary
This article analyzes the record-breaking 19 ppb increase in atmospheric methane (CH4) in 2020. Using an ensemble of constraints including satellite observations of methane's oxidation products (formaldehyde and carbon monoxide) along with methyl chloroform data as an OH proxy, the research simultaneously quantifies methane sources and sinks. The study resolves uncertainties caused by COVID-related pollutant shifts affecting hydroxyl radical concentrations, providing a clearer picture of why methane levels surged in 2020 by disentangling source emissions from sink changes.
Source
bskySatellite and atmospheric data resolve causes of record 2020 methane increasedoi.orgKey quotes
· 3 pulledSatellite observations show that atmospheric methane (CH4) increased by a record-breaking 19 ppb in 2020
We employ an ensemble of constraints to simultaneously quantify methane sources and sinks for 2020
Combining satellite measurements of the methane-HCHO-CO oxidation chain with methyl chloroform data disentangles methane sources and sinks
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