Dr Michelle Santee This is Me

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1. 1. The Ozone Hole ArcticOzone

   www.theozonehole.com/arcticozo - [Cached]

   Published on: 9/15/2006   Last Visited: 11/22/2007

   "Data from the Microwave Limb Sounder on UARS have provided the first opportunity to observe nitric acid throughout the Arctic and the Antarctic over a period of many years," said Michelle Santee, a scientist at NASA's Jet Propulsion Laboratory, Pasadena, CA, who is a co-author of the Science paper. "The continued presence of nitric acid in the Arctic winter -- which is not the case in the Antarctic -- helps to moderate ozone loss by reducing the amount of reactive chlorine, but this could change in the future," she added.

2. 2. Geotimes - February 2006 - Geophenomena

   www.geotimes.org/feb06/geophen - [Cached]

   Published on: 2/1/2006   Last Visited: 8/1/2006

   The ozone hole in the Antarctic reached its maximum last year on Sept. 11, when temperature conditions and chemical concentrations hit their prime during the Antarctic spring, according to Michelle Santee of NASA's Jet Propulsion Laboratory in Pasadena, Calif. Using NASA's Aura satellite, which has been tracking global ozone levels and other ozone-depleting chemicals since its launch in 2004, Santee and co-workers have determined that seasonal changes in ozone levels vary at the north and south poles.
   
   Monitoring so far, she said at the AGU meeting, shows that the Arctic gets warm enough so that chlorine-containing molecules have less of a destructive effect than in Antarctica, where it is cold enough to maintain the chemical reactions that destroy ozone year-round. But wind patterns in the Arctic also disperse chemicals and ozone, enough so that the status of ozone at the northern pole remains unclear, Santee said.

3. 3. esw.agiweb.org

   esw.agiweb.org/news/details.ht - [Cached]

   Published on: 5/25/2000   Last Visited: 3/18/2003

   Michelle Santee, a scientist at NASA's Jet Propulsion Laboratory, Pasadena, CA, who is a co-author of the Science paper. "The continued presence of nitric acid in the Arctic winter -- which is not the case in the Antarctic -- helps to moderate ozone loss by reducing the amount of reactive chlorine, but this could change in the future," she added.