@misc{zahn_a_longterm_2008, 
author={Zahn, M., Storch, H.v.},
title={A long-term climatology of North Atlantic polar lows},
year={2008},
howpublished = {journal article},
doi = {https://doi.org/10.1029/2008GL035769},
abstract = {A dynamical downscaling of the 6-hourly 1948–2006 NCEP/NCAR re-analyses for the subarctic region of the North Atlantic has been used to derive a climatology of polar lows by means of a tracking algorithm based on the simulated bandpass filtered MSLP-fields. This climatology is consistent with the limited observational evidence in terms of frequency and spatial distribution. The climatology exhibits strong year-to-year variability but weak decadal variability and a negligible trend. A Canonical Correlation Analysis describes the conditioning of the formation of polar lows by characteristic meridional seasonal mean flow regimes, which favor cold air outbreaks and upper air troughs.},
note = {Online available at: \url{https://doi.org/10.1029/2008GL035769} (DOI). Zahn, M.; Storch, H.: A long-term climatology of North Atlantic polar lows. Geophysical Research Letters. 2008. vol. 35, L22702. DOI: 10.1029/2008GL035769}}