Printer Friendly

A priest's ozone legacy.

For 26 years in the late 19th century, Father Francesco Denza kept very regular records that are now helping scientists understand how the industrial revolution increased ozone pollution in the troposphere, the atmosphere's lowest layer.

From January 1868 through December 1893, this theologian and physics teacher took twice-daily readings of ground-level atmospheric ozone at his college in Moncalieri, located at the foot of the Italian Alps. In Denza's time, researchers suspected that ozone might cause epidemic diseases. Scientists now recognize tropospheric ozone -- a component of smog -- as a greenhouse gas as well as an eye an lung irritant.

A team of Italian scientists has converted Denza's data to a modern scale in order to compare today's ozone levels with those of a preindustrial environment. In the Sept. 20 JOURNAL OF GEOPHYSICAL RESEARCH, they report that 19th-century Moncalieri had one-half to one-third the ozone present in a modern rural site. Exhaust from cars, power plants and other sources creates ozone in the lower troposphere.

A quirk of the region's weather enabled the scientists to use Denza's data to gauze ozone changes in the upper troposphere as well. The Alps often cause winds to descend into the Moncalieri region, bringing air from higher levels down to ground level. By identifying such events in Denza's records, the researchers demonstrate that ozone has also accumulated in the upper troposphere.
COPYRIGHT 1991 Science Service, Inc.
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 1991, Gale Group. All rights reserved. Gale Group is a Thomson Corporation Company.

Article Details
Printer friendly Cite/link Email Feedback
Title Annotation:Francesco Denza's record of ozone pollution in the late 19th century at Moncalieri, Italy
Publication:Science News
Date:Oct 12, 1991
Previous Article:No sign of ozone loss from launches.
Next Article:A dietary shield against lung cancer?

Related Articles
Antarctic ozone hole sinks to a record low.
Summer ozone loss detected for first time.
Fueling cleaner air.
Ozone layer succumbs to assault.
Volcanic bite out of Antarctic ozone?
Antarctic ozone hole expands in altitude.
Pollution surge from new Chinese cars.
The stifling side of Asian exports.
Smoggy Asian air enters United States.

Terms of use | Copyright © 2017 Farlex, Inc. | Feedback | For webmasters