Extreme weather events in early Summer 2018 connected by a recurrent hemispheric wave-7 pattern.

This is a Preprint and has not been peer reviewed. The published version of this Preprint is available: https://doi.org/10.1088/1748-9326/ab13bf.

Downloads

Download Preprint

Supplementary Files
Authors

Kai Kornhuber , Scott Osprey, Dim Coumou, Stefan Petri, Vladimir Petoukhov, Stefan Rahmstorf, Lesley Gray

Abstract

The summer of 2018 witnessed a number of extreme weather events such as heatwaves in North America, Western Europe and the Caspian Sea region and rainfall extremes in South-East Europe and Japan that occurred near-simultaneously. Here we show that these extremes were connected by an amplified hemisphere-wide wavenumber 7 circulation pattern. We show that this pattern constitutes a teleconnection in Northern Hemisphere summer associated with prolonged and above-normal temperatures in North America, Western Europe and the Caspian Sea region. This pattern was also observed during the European heatwaves of 2003, 2006, 2012 and 2015 among others. We show that the occurrence of this wave 7 pattern has increased over recent decades.

DOI

https://doi.org/10.31223/osf.io/tq23m

Subjects

Atmospheric Sciences, Climate, Oceanography and Atmospheric Sciences and Meteorology, Physical Sciences and Mathematics

Keywords

Heat Extremes, Jetstream, Rossby Waves, Summer 2018

Dates

Published: 2018-11-28 15:59

Last Updated: 2019-04-29 12:40

Older Versions
License

CC BY Attribution 4.0 International

Add a Comment

You must log in to post a comment.


Comments

There are no comments or no comments have been made public for this article.