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TOAR shows present-day global ozone distribution and trends relevant to health; public database

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These are some of the findings of a new health assessment based on the Tropospheric Ozone Assessment Report (TOAR), an effort by the International Global Atmospheric Chemistry Project to create the world’s most comprehensive database of surface ozone observations from all available ozone monitoring stations around the globe. Click to enlarge.

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PNNL-led international study finds ultrafine aerosols have outsize impact on storm clouds, precipitation

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Deep convective cloud (DCC) systems in the tropics produce copious precipitation and drive the global-scale circulation. They found that when larger particles aren’t present high in a warm and humid environment, it spells opportunity for the smaller particles to act and form cloud droplets.