Mathematics – Logic
Scientific paper
May 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agusmsa33a..06b&link_type=abstract
American Geophysical Union, Spring Meeting 2009, abstract #SA33A-06
Mathematics
Logic
3334 Middle Atmosphere Dynamics (0341, 0342), 3394 Instruments And Techniques
Scientific paper
While chemical ozone depletion in the Antarctic spring-time stratosphere is now an annually occurring and well-understood phenomenon, dynamical variability in the Arctic stratosphere means ozone depletion in the northern polar vortex is both less predictable and more susceptible to changes resulting from climate change than in the southern vortex. In order to examine ozone-depleting processes and quantify chemical changes occurring in the Arctic polar stratosphere, it is important to combine a range of data sources to describe both the chemistry and the dynamics of the polar vortex. Ground-based Fourier transform spectroscopy provides a well-defined and useful data set of atmospheric trace gas measurements around the globe. Key chemical species involved in stratospheric ozone depletion, including chlorine reservoirs HCl and ClONO2, nitrogen reservoir HNO3, fluorine reservoir HF and ozone itself are standard measurements for the Network for the Detection of Atmospheric Composition Change (NDACC) Fourier transform infrared (FTIR) spectrometers. During the 2007 and 2008 International Polar Year (IPY) spring periods, measurements were made with ground-based FTIR spectrometers at six NDACC stations around the Arctic. In this work, these measurements will be used in conjunction with dynamical analyses in order to characterize the Arctic polar stratosphere. In addition, the measurements will be compared and contrasted with the IPY runs of two meteorologically assimilated global chemistry models, the Canadian Middle Atmosphere Model - Data Assimilated (CMAM-DA), and the Environment Canada Global Environmental Multiscale stratospheric model, run with the BIRA (Belgian Institute for Space Aeronomy) online chemistry package (GEM-BACH) in order to better quantify our current understanding of the processes occurring in the polar atmosphere.
Barthlott S.
Batchelor R.
Beagley Stephen
Blumenstock Th.
Chabrillat Simon
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