Articles | Volume 21, issue 7
Research article
07 Apr 2021
Research article |  | 07 Apr 2021

Reanalysis intercomparison of potential vorticity and potential-vorticity-based diagnostics

Luis F. Millán, Gloria L. Manney, and Zachary D. Lawrence

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This preprint is open for discussion and under review for Atmospheric Chemistry and Physics (ACP).
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Cited articles

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ECMWF: ERA-Interim, available at:, last access: 1 June 2020. a
Short summary
We assess how consistently reanalyses represent potential vorticity (PV) among each other. PV helps describe dynamical processes in the stratosphere because it acts approximately as a tracer of the movement of air parcels; it is extensively used to identify the location of the tropopause and to identify and characterize the stratospheric polar vortex. Overall, PV from all reanalyses agrees well with the reanalysis ensemble mean.
Final-revised paper