They
analyzed ozone measurements taken from weather balloons and satellites, as well as satellite measurements of sulfur dioxide emitted by volcanoes, which can also enhance ozone depletion.
Climate scientists studying three decades of
ozone measurements from seven satellites see a positive trend in the upper stratospheric ozone thanks to international efforts to curb ozone - depleting substances.
Ozone ups and downs15 November 2017 Climate scientists studying three decades
of ozone measurements from seven satellites see a positive trend in global recovery thanks to international efforts to curb ozone - depleting substances.
They then compared their yearly September
ozone measurements with model simulations that predict ozone levels based on the amount of chlorine that scientists have estimated to be present in the atmosphere from year to year.
Using ozone measurements combined with climate models developed at GFDL, the authors identified pollution from Asia as driving the climb in ozone in western U.S. national parks in the spring, when wind and weather patterns push Asian pollution across the Pacific Ocean.
Impact: Replacing old ozone analyzers at existing stations and adding new sites on the west and east coast of the U.S. would increase the reliability and scope of
surface ozone measurements (which may be impacted by industrial activity in Asia).
We downloaded from the NASA Goddard Space Flight Center's website all of the available monthly
averaged ozone measurements from the NASA Total Ozone Mapping Spectrometer (TOMS) satellite (August 1996 - November 2005).
Comment on 13: I fully agree with Markus Rex that
total ozone measurements can not give any clues on chemical destruction in isolated layers, and that we may have been lucky that O3 transport cancelled out the chemical thinning that happened during the last months.
The researchers compared results from a model called GFDL - AM3 to
ozone measurements from monitoring stations over the course of the last 35 years, from 1980 to 2014.
``... very little feedback came through to us until a telephone call from the United States embassy to say that Bob Watson was coming across, bringing some satellite pictures of the TOMS maps
of ozone measurements, would I like to wander down to the embassy to have a look at them....»
In August a study conducted by the Cooperative Institute for Research in Environmental Sciences in Colorado revealed that
ozone measurements have stopped declining over the midlatitudes of the Northern and Southern hemispheres, where the bulk of the world's population resides.
Atmospheric scientist Laura Pan of the National Center for Atmospheric Research in Boulder, Colorado, says
the ozone measurements are just a suggestion of OH levels in the troposphere, not proof.
The ozone measurements, taken between 2 and 6 miles in altitude (3 - 10 kilometers) over a large part of the eastern Indian Ocean, were as high as 80 parts per billion - levels similar to a polluted day in a U.S. city and several times more than normal.
For
the ozone measurements, all the data we take go to an international database where ozone measurements from around the world are kept.
The ozone measurements are really good, because the data our instrument collects contribute to creating maps of ozone cover over Antarctica.