Ice-core records reveal changes in atmospheric hydrogen levels due to climate change, suggesting significant human impact.
An ice-core record of hydrogen reveals that atmospheric levels vary in response to climate change and have increased drastically owing to human activity since the pre-industrial era. The apparent sensitivity of hydrogen cycling to environmental conditions should be considered when projecting the consequences of rising anthropogenic hydrogen emissions in a warming climate. Ice-core measurements reveal that hydrogen levels have increased with fossil-fuel burning and might vary with climate change.
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