Word: layerings
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Wennberg and Andersons' research addresses the fundamental question of whether Boeing, or any firm, can build such vast fleets of supersonic aircraft without doing irreparable damage to the lower ozone layer...
...results are uncertain because lot of key reaction rates have not been measured at low temperature in the lower ozone layer," Salawitch says. "We also really don't have an accurate understanding of how engine exhaust is transported to higher altitudes...
...With the Perseus-like technology, we will be able to look in good detail" to understand the chemistry of the ozone layer, Wennberg says. "We are measuring levels that are 1 part in a trillion, and then changes that are 0.01 of 0.001 parts per trillion...
Despite the technological difficulties Wennberg and Anderson have encountered, atmospheric researchers are continuing their efforts to understand all areas of the ozone layer. And scientists involved with their research are optimistic about future efforts...
...paper is another step along the road [to understanding the chemistry of the ozone layer]," says David W. Fahey, a research physicist at the National Oceanic and Atmospheric Administration Aeronomy Laboratory, and co-author of the paper. "The stage has been nicely set."Photo Courtesy the US Air ForceThe scientists flew their instruments in a converted version of this U-2 jet, which NASA calls...