Articles | Volume 21, issue 4
Atmos. Chem. Phys., 21, 2781–2794, 2021
https://doi.org/10.5194/acp-21-2781-2021
Atmos. Chem. Phys., 21, 2781–2794, 2021
https://doi.org/10.5194/acp-21-2781-2021
Research article
24 Feb 2021
Research article | 24 Feb 2021

The spring transition of the North Pacific jet and its relation to deep stratosphere-to-troposphere mass transport over western North America

Melissa L. Breeden et al.

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Cited articles

Albers, J. R., Perlwitz, J., Butler, A. H., Birner, T., Kiladis, G. N., Lawrence, Z. D., and Dias, J.: Mechanisms governing interannual variability of stratosphere-to-troposphere ozone transport, J. Geophys. Res.-Atmos., 123, 234–260, https://doi.org/10.1002/2017JD026890, 2018. 
Athanasiadis, P. J., Wallace, J. M., and Wettstein, J. J.: Patterns of winter- time jet stream variability and their relation to the storm tracks, J. Atmos. Sci., 67, 1361–1381, https://doi.org/10.1175/2009JAS3270.1, 2010. 
Breeden, M. L., Hoover, B. T., Newman, M., and Vimont D. J.: Optimal North Pacific Blocking Precursors and their Deterministic Subseasonal Evolution during Boreal Winter, Mon. Weather Rev., 148, 739–761, https://doi.org/10.1175/MWR-D-19-0273.1, 2020. 
Breeden, M. L. and Martin J. E.: Analyzing the onset of an extreme North Pacific Jet Retraction using Piecewise Tendency Diagnosis, Q. J. R. Meteor. Soc., 144, 1895–1913, https://doi.org/10.1002/qj.3388, 2018. 
Christenson, C. E., Martin, J. E., and Handlos Z. J.: A synoptic-climatology of Northern Hemisphere, cold season polar and subtropical jet superposition events, J. Climate, 30, 7231–7246, 2017. 
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Short summary
Prior research has found a maximum in deep stratosphere-to-troposphere mass/ozone transport over the western United States in boreal spring, which can enhance surface ozone concentrations, reducing air quality. We find that the winter-to-summer evolution of the north Pacific jet increases the frequency of stratospheric intrusions that drive transport, helping explain the observed maximum. The El Niño–Southern Oscillation affects the timing of the spring jet transition and therefore transport.
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