EGU21-2875
https://doi.org/10.5194/egusphere-egu21-2875
EGU General Assembly 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

The role of tropopause polar vortices in the intensification of Summer Arctic cyclones

Suzanne L. Gray1, Kevin Hodges1,2, Jonathan Vautrey1,3, and John Methven1
Suzanne L. Gray et al.
  • 1University of Reading, Department of Meteorology, Reading, UK (s.l.gray@reading.ac.uk)
  • 2National Centre for Atmospheric Science, University of Reading, UK
  • 3Now at Met Office, UK

Human activity in the Arctic is expected to increase as new regions become accessible, with a consequent need for reliable forecasts of hazardous weather. Arctic cyclones are synoptic-scale cyclones developing within or moving into the Arctic region. Meso- to synoptic-scale tropopause-based coherent vortices called tropopause polar vortices (TPVs) are frequently observed in polar regions and are a proposed mechanism for Arctic cyclone genesis and intensification. While the importance of pre-existing tropopause-level features for cyclone development, and their existence as part of the three-dimensional mature cyclone structure, is well established in the mid-latitudes, evidence of the importance of pre-existing TPVs for Arctic cyclone development is more limited. Here we present a climatology and characteristics of summer Arctic cyclones and TPVs, produced by tracking them in the latest global ECMWF reanalysis (ERA5), and determine the role of pre-existing TPVs in the initiation and intensification of these cyclones.

How to cite: Gray, S. L., Hodges, K., Vautrey, J., and Methven, J.: The role of tropopause polar vortices in the intensification of Summer Arctic cyclones, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-2875, https://doi.org/10.5194/egusphere-egu21-2875, 2021.

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