Chemical Equator Divides Hemispheres | October 6, 2008 Issue - Vol. 86 Issue 40 | Chemical & Engineering News
 
 
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Volume 86 Issue 40 | p. 46 | Concentrates
Issue Date: October 6, 2008

Chemical Equator Divides Hemispheres

Department: Science & Technology

Earth's polluted Northern Hemisphere is separated from its cleaner Southern Hemisphere by a sharp gradient in the troposphere known as a chemical equator, according to observations by Jacqueline F. Hamilton at the University of York, in England, and colleagues. Scientists previously thought that the atmospheric boundary between the hemispheres was formed solely by a meteorological feature known as the Intertropical Convergence Zone (ITCZ). This cloudy belt, where the trade winds from each hemisphere meet, . . .

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