Sunday, April 17, 2016

This is a bit of history of nitrous oxide in Earth's atmosphere.

This article is in the American Chemical Society (ACS) publication entitled, "Chemical and Engineering News." To understand the strong statement by the ACS regarding this greenhouse gas an appreciation of it's history might be in order. The ACS is the backbone of the international standards in chemistry.

Thirty-five chemists met (click here) at the College of Pharmacy of the City of New York on April 6, 1876, to found the American Chemical Society. Seven months later, the first president of the newly formed society, John William Draper, delivered his inaugural address at Chickering Hall in New York.
From its inception, the ACS was committed to sharing its professional work with a public audience. ACS began publishing its flagship journal, the Journal of the American Chemical Society (JACS), in April, 1879. Abstracts, which had appeared in JACS since 1897, were given their own publication, Chemical Abstracts in January 1907.
By 1930, ACS had 18,206 members, 83 local sections and 17 disciplinary divisions. On August 25, 1937, President Franklin D. Roosevelt signed Public Act No. 358, incorporating the society under federal charter. ACS celebrated its centennial year in 1976, at two national meetings with over 10,000 attendees at each....

The article:

August 31, 2009
Volume 87 Issue 35/p. 8/News of The Week
By Jyllian N. Kemsley

Nitrous oxide emissions (click here) are now the single most important threat to the ozone layer, which protects Earth and its inhabitants from ultraviolet radiation, NOAA scientists report (Science, DOI:10.1126/science.1176985).
The chemistry of atmospheric N2O is well-established: It is stable in the lowest level of the atmosphere, the troposphere, where it has a lifetime of about 100 years and acts like a greenhouse gas. When N2O migrates up to the stratosphere, it is converted to NO, which reacts with O3 to produce NO2 and O2. NO2 in turn reacts with O to re-form NO.
The new work uses this N2O chemistry to calculate nitrous oxide’s “ozone-depletion potential,” which compares the O3 destroyed per unit mass of N2O and per unit mass of CFCl3....