Abstract

SCAFFOLD TOWERS sprang up in spots around California in late spring of last year. Up to six stories tall, they were soon festooned with mysterious-looking scientific gadgets and tubes. At their bases emerged trailer encampments loaded with additional instruments. Aircraft decorated with odd protuberances flew in, and the research vessel Atlantis cruised the coastline, laden with its own array of analytical devices. Behind all this activity was a coordinated set of three field campaigns to analyze physical and chemical processes in the atmosphere. In all the debates over pollution, air quality, and climate change, one thing is undeniable: If we don’t know what chemicals are put into the atmosphere, whether from nature or human activity, and how those chemicals react with each other, we won’t be able to predict their effect on air quality and climate. Air analysis therefore plays a basic and critical role in understanding atmospheric processes and predicting their outcomes, both short ...

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