Overview of Long-term Stratospheric Measurements at Lauder, New Zealand, and Arrival Heights, Antarctica
Abstract
Ground-based remote measurements of stratospheric trace species began in Lauder, New Zealand (45 S), in December 1980, and have been made continuously since that time. Initially, only NO2 and O3 were measured, using UV/visible scattered light spectroscopy. A variety of other techniques and species have been added since that time, so that today, ongoing, long-term data series exist for HCl, ClONO2, CO, BrO, H2O, spectral UV irradiances, aerosol, and many other trace species. Balloon-borne ozonesondes have been flown regularly since August 1986. We have measured many of the same species at Arrival Heights, Antarctica (78 S), commencing at different times during the period 1982 to 1998. In addition, a variety of long-term measurements are made at these sites in collaboration with overseas investigators, including ClO, O3, and H2O profiles. The principal institution responsible for measurements at the Lauder and Arrival Heights sites is the New Zealand National Institute for Water and Atmospheric Research (NIWA). This presentation will examine some of the principal results from the NIWA data sets, including the long-term trends and variability of the O3 profile, NO2, Cly, and erythemal UV. We will interpret them in relation to anthropogenic emissions and natural events, and in particular address the question whether reversals are detected in the long-term trends in response to emission controls.
- Publication:
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AGU Spring Meeting Abstracts
- Pub Date:
- May 2005
- Bibcode:
- 2005AGUSM.A53B..03C
- Keywords:
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- 0340 Middle atmosphere: composition and chemistry