RT Journal Article
T1 Observed connections of Arctic stratospheric ozone extremes to Northern Hemisphere surface climate
A1 Ivy, Diane J.
A1 Solomon, Susan
A1 Calvo Fernández, Natalia
A1 Thompson, David W. J.
AB 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.
PB IOP Publishing Ltd
SN 1748-9326
YR 2017
FD 2017-02
LK https://hdl.handle.net/20.500.14352/18237
UL https://hdl.handle.net/20.500.14352/18237
LA eng
NO © 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.
NO Unión Europea. FP7
NO Ministerio de Economía y Competitividad (MINECO)
NO National Science Foundation (NSF) Atmospheric Chemistry grant
NO NSF Climate Dynamics Program
DS Docta Complutense
RD 27 abr 2024