Abstract

For the past two decades much concern has been focussed on the question of possible changes in the stratospheric ozone layer induced by human activity. The primary long-term record of the amount of stratospheric ozone has been obtained via ground-based measurements by Dobson spectrophotometers based at a few tens of stations located mostly at northern mid latitudes. In addition to the sparseness of this network f or, global coverage, these Instruments show drifts relative to one another which are minimized by comparison to a world standard instrument which is calibrated each year at Mauna Loa. The solution to the problem of obtaining truly global trends is to couple this ground-based system with satellite-based remote sensing.

© 1990 Optical Society of America