Publication Abstracts
Wargan et al. 2018
Wargan, K., , S. Pawson, J.R. Ziemke, L.D. Oman, M. Olsen, L. Coy, and K.E. Knowland, 2018: Recent decline in lower stratospheric ozone attributed to circulation changes. Geophys. Res. Lett., 45, no. 10, 5166-5176, doi:10.1029/2018GL077406.
1998-2016 ozone trends in the lower stratosphere (LS) are examined using the Modern-Era Retrospective Analysis for Research and Applications Version 2 (MERRA-2) and related NASA products. After removing biases resulting from step-changes in the MERRA-2 ozone observations, a discernible negative trend of -1.67±0.54 Dobson units per decade (DU/decade) is found in the 10-km layer above the tropopause between 20°N and 60°N. A weaker but statistically significant trend of -1.17±0.33 DU/decade exists between 50°S and 20°S. In the Tropics, a positive trend is seen in a 5-km layer above the tropopause. Analysis of an idealized tracer in a model simulation constrained by MERRA-2 meteorological fields provides strong evidence that these trends are driven by enhanced isentropic transport between the tropical (20°S-20°N) and extratropical LS in the past two decades. This is the first time that a reanalysis dataset has been used to detect and attribute trends in lower stratospheric ozone.
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BibTeX Citation
@article{wa06700y,
author={Wargan, K. and Orbe, C. and Pawson, S. and Ziemke, J. R. and Oman, L. D. and Olsen, M. and Coy, L. and Knowland, K. E.},
title={Recent decline in lower stratospheric ozone attributed to circulation changes},
year={2018},
journal={Geophysical Research Letters},
volume={45},
number={10},
pages={5166--5176},
doi={10.1029/2018GL077406},
}
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RIS Citation
TY - JOUR ID - wa06700y AU - Wargan, K. AU - Orbe, C. AU - Pawson, S. AU - Ziemke, J. R. AU - Oman, L. D. AU - Olsen, M. AU - Coy, L. AU - Knowland, K. E. PY - 2018 TI - Recent decline in lower stratospheric ozone attributed to circulation changes JA - Geophys. Res. Lett. JO - Geophysical Research Letters VL - 45 IS - 10 SP - 5166 EP - 5176 DO - 10.1029/2018GL077406 ER -
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