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Observed connections of Arctic stratospheric ozone extremes to Northern Hemisphere surface climate

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Ivy, Diane J. and Solomon, Susan and Calvo Fernández, Natalia and Thompson, David W. J. (2017) Observed connections of Arctic stratospheric ozone extremes to Northern Hemisphere surface climate. Environmental research letters, 12 (2). ISSN 1748-9326

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Official URL: http://dx.doi.org/10.1088/1748-9326/aa57a4


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http://iopscience.iop.org/Publisher


Abstract

We present observational evidence for linkages between extreme Arctic stratospheric ozone anomalies in March and Northern Hemisphere tropospheric climate in spring (March-April). Springs characterized by low Arctic ozone anomalies in March are associated with a stronger, colder polar vortex and circulation anomalies consistent with the positive polarity of the Northern Annular Mode/North Atlantic Oscillation in March and April. The associated spring tropospheric circulation anomalies indicate a poleward shift of zonal winds at 500 hPa over the North Atlantic. Furthermore, correlations between March Arctic ozone and March-April surface temperatures reveal certain regions where a surprisingly large fraction of the interannual variability in spring surface temperatures is associated with interannual variability in ozone. We also find that years with low March Arctic ozone in the stratosphere display surface maximum daily temperatures in March-April that are colder than normal over southeastern Europe and southern Asia, but warmer than normal over northern Asia, adding to the warming from increasing well-mixed greenhouse gases in those locations. The results shown here do not establish causality, but nevertheless suggest that March stratospheric ozone is a useful indicator of spring averaged (March-April) tropospheric climate in certain Northern Hemispheric regions.


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© 2017 IOP Publishing Ltd. We thank two anonymous reviewers for their helpful comments and suggestions. DJI and SS were supported by National Science Foundation (NSF) Atmospheric Chemistry grant AGS-1539972. NC acknowledges partial support from the Spanish Ministry of Economy and Competitiveness through the PALEOSTRAT project (CGL2015-69699) project and the European Project 603557-STRATOCLIM under program FP7-ENV.2013.6.1-2. DWJT is supported by the NSF Climate Dynamics Program.

Uncontrolled Keywords:Sudden warmings; Blocking; Oscillation; Anomalies; Trends
Subjects:Sciences > Physics > Astrophysics
Sciences > Physics > Astronomy
ID Code:45444
Deposited On:22 Nov 2017 11:11
Last Modified:10 Dec 2018 15:04

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