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Q4: How is total ozone distributed over the globe ?. Total Ozone : sum of all the ozone in the atmosphere directly above the location where the measurement takes place Dobson units
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Q4: Howis total ozonedistributedovertheglobe? • Total Ozone: sumof all theozone in theatmospheredirectlyabovethelocationwherethemeasurementtakesplace Dobson units • Strong temporal (dailytoseasonal) andspatial (vertical, latitudinal and longitudinal) variations (200-500 DU) • Source region: tropics (UV light), but largestvaluesarefoundat high latitudes, lowest values in thetropics large-scaleaircirculation in thestratospheretransports ozonetowardthepoles (Brewer-Dobson circulation) • Seasonalvariationsofthistransport, different production/destructionratesandsmall-scaledynamicscause global distributionpattern
Seasonal Distribution • NH: maximum at high latitudes during spring • increaseddestructionduring polar summer • minimum in early fall • SH: minimum in spring over Antarctica (ozone hole) • mixing with lower-altitude air ozone hole disappears • Tropics: smaller seasonal variations due to smaller changes in transport and sunlight http://wdc.dlr.de/data_products/SERVICES/rose/analysis.html