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Science 7 May 1999:
Vol. 284. no. 5416, pp. 900 - 901
DOI: 10.1126/science.284.5416.900
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News Focus

ATMOSPHERIC SCIENCE:
Digging in the Mire for the Air of Ancient Times

Robert Koenig

BERN--Certain types of peat bogs are proving to be invaluable archives of trace metals, capturing year-by-year records of these atmospheric contaminants from the rain and snow that fall on the surface, as several recent studies including a 4000-year record of mercury deposition in a Spanish bog (see report on page 939) show. The records reflect human activities such as mining; recent results have shown that they also open a window on temperature and humidity trends over thousands of years.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)