Editing Polar vortex (section)

==Further reading==
* {{cite web|title=The science behind the polar vortex |url=https://www.noaa.gov/infographic/science-behind-polar-vortex |website=NOAA.gov (NASA)|date=29 Jan 2019|access-date=31 Jan 2019|language=en}}
* {{cite web|title=What Is a Polar Vortex? |url=https://scijinks.gov/polar-vortex/ |website=NOAA SciJinks.gov (NASA)|access-date=31 Jan 2019|language=en}}
* {{cite web|title=What is the Polar Vortex? |url=https://www.weather.gov/safety/cold-polar-vortex |website=US National Weather Service|access-date=31 Jan 2019|language=en}}
* {{cite journal |doi=10.1029/96JD00066 |title=An objective determination of the polar vortex using Ertel's potential vorticity |year=1996 |last1=Nash |first1=Eric R. |last2=Newman |first2=Paul A. |last3=Rosenfield |first3=Joan E. |last4=Schoeberl |first4=Mark R. |journal=Journal of Geophysical Research |volume=101 |issue=D5 |pages=9471–9478 |bibcode=1996JGR...101.9471N|url=https://zenodo.org/record/1231378 }}
* {{cite journal |doi=10.1175/1520-0469(1986)043<1319:TAOTSP>2.0.CO;2 |year=1986 |volume=43 |pages=1319–1339 |title=The Area of the Stratospheric Polar Vortex as a Diagnostic for Tracer Transport on an Isentropic Surface |last1=Butchart |first1=Neal |last2=Remsberg |first2=Ellis E. |journal=Journal of the Atmospheric Sciences |issue=13 |bibcode=1986JAtS...43.1319B|doi-access=free }}
* {{cite journal |doi=10.1029/91JD02168 |title=The structure of the polar vortex |year=1992 |last1=Schoeberl |first1=Mark R. |last2=Lait |first2=Leslie R. |last3=Newman |first3=Paul A. |last4=Rosenfield |first4=Joan E. |journal=Journal of Geophysical Research |volume=97 |issue=D8 |pages=7859–7882 |bibcode=1992JGR....97.7859S}}
* {{cite journal |doi=10.1029/97GL52832 |title=Meteorology of the polar vortex: Spring 1997 |year=1997 |last1=Coy |first1=Lawrence |last2=Nash |first2=Eric R. |last3=Newman |first3=Paul A. |journal=Geophysical Research Letters |volume=24 |issue=22 |pages=2693–2696 |bibcode=1997GeoRL..24.2693C|s2cid=128461145 }}
* {{cite journal |doi=10.1126/science.251.4989.46 |title=The Dynamics of the Stratospheric Polar Vortex and Its Relation to Springtime Ozone Depletions |year=1991 |last1=Schoeberl |first1=M.R. |last2=Hartmann |first2=D.L. |journal=Science |volume=251 |issue=4989 |pages=46–52 |pmid=17778602|bibcode = 1991Sci...251...46S }}