'Chemical Equator' Discovery Will Aid Pollution Mapping

Scientists have discovered a 'chemical equator' that divides the polluted air of the Northern Hemisphere from the largely uncontaminated atmosphere of the Southern hemisphere. Researchers found evidence for an atmospheric chemical equator around 50 km wide in cloudless skies in the Western Pacific. Their findings show for the first time that the chemical and meteorological boundaries between the two air masses are not necessarily the same.

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