Ozone measurements from a global network of surface sites

Oltmans, Samuel J.; Levy, Hiram, II

From a network of surface ozone monitoring sites distributed primarily over the Atlantic and Pacific Oceans, the seasonal, day-to-day, and diurnal patterns are delineated. At most of the NH (Northern Hemisphere) sites there is a spring maximum and late summer or autumn minimum. At Barrow, AK (70 deg N) and Barbados (14 deg N), however, there is a winter maximum, but the mechanisms producing the maximum are quite different. All the sites in the SH (Southern Hemisphere) show winter maxima and summer minima. At the subtropical and tropical sites, there are large day-to-day variations that reflect the changes in flow patterns. Air of tropical origin has much lower ozone concentrations than air from higher latitudes. At the two tropical sites (Barbados and Samoa), there is a marked diurnal ozone variation with highest amounts in the early morning and lowest values in the afternoon. At four of the locations (Barrow, AK; Mauna Loa, HI; American Samoa; and South Pole), there are 15- through 20-year records which allow us to look at longer term changes. At Barrow there has been a large summer increase over the 20 years of measurements. At South Pole, on the other hand, summer decreases have led to an overall decline in surface ozone amounts.

Document ID

19950004183

Acquisition Source

Legacy CDMS

Document Type

Conference Paper

Authors

Date Acquired

September 6, 2013

Publication Date

April 1, 1994

Publication Information

Publication: NASA. Goddard Space Flight Center, Ozone in the Troposphere and Stratosphere, Part 1

Subject Category

Accession Number

95N10595

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Public

Work of the US Gov. Public Use Permitted.

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