Surface ozone measurements in Amazonia | Zendy

Kirchhoff Volker W. J. H. | Zendy

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Surface ozone measurements in Amazonia

Author(s) -

Kirchhoff Volker W. J. H.

Publication year - 1988

Publication title -

journal of geophysical research: atmospheres

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.67

H-Index - 298

eISSN - 2156-2202

pISSN - 0148-0227

DOI - 10.1029/jd093id02p01469

Subject(s) - daytime , thunderstorm , atmospheric sciences , environmental science , ozone , diurnal temperature variation , mixing ratio , amazon rainforest , diurnal cycle , climatology , meteorology , geology , geography , ecology , biology

Surface ozone concentrations have been measured continuously for the first time, in a forest preserve area near Manaus (3°S, 60°W) during the ABLE 2A field expedition of July–August 1985. Major subjects addressed are diurnal variations and processes that might control it, both dynamic and chemical. Intense transient variations have been observed in association with showers and thunderstorms. The diurnal variations are well defined, with minimum concentrations during the night and maximum concentrations in the daytime. At night it is not uncommon to find zero O 3 mixing ratios, whereas the daytime maximum of between 7 and 31 parts per billion by volume occurs around 1200–1300 LT. Below a height of 6 m a very strong O 3 concentration gradient is found. On two occasions, nearby thunderstorms have caused strong abnormal enhancements of the O 3 concentration.

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