|From||Roger Brugge <firstname.lastname@example.org>|
|Date||Sat, 20 Apr 2019 13:18:15 +0000|
PhD position in Stockholm University
Weather and climate extremes: predictability and stratospheric links
Weather and climate extremes and their predictability are currently at the fore-front of the research enterprise due to their high societal and environmental impacts. Changes in the intensity an/or frequency of extremes, and their link to large scale teleconnection, as a result of climate change constitute yet another equally important topic for which no consensus is reached.
The stratosphere is known for its large scale activity implied by the well-known sudden stratospheric warming (SSW). It has been shown that SSW can enhance stratospheric predictability. There is evidence on the influence of stratospheric circulation on the midlatitude and extratropical tropospheric predictability (Mukougawa et al. 2009) with a particular link of stratospheric activity, e.g. SSWs, to extratropical eddy-driven jet streams and polar fronts (Iqbal et al. 2019). This strongly suggests that stratospheric activity and SSWs have non-negligible effects on weather and climate variability and can therefore exert an influence on extremes in the troposphere and enhance their predictability.
The objective of this PhD proposal is to analyse weather extremes and teleconnection effect, with a particular focus on the extratropics, using a set of reanalyses, identify any change in their frequency and/or intensity, and investigate the link to stratospheric events. The modelling effect of the stratosphere on weather extremes and their predictability will be investigated using a long simulation of a climate model along with forcast and hindcast data based on an operational forecast model.
Application online at
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