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Defining the Polar Vortex Edge Using an N2O: Potential Temperature Correlation Versus the Nash Criterion: A ComparisonA prerequisite to study phenomena in the winter stratospheric polar vortex is the separation of measurements inside and outside the dynamical barrier of the vortex edge. We describe a technique to accurately determine the inner edge of the vortex boundary region from measurements of potential temperature and a trace gas, such as N2O, and apply it to in situ aircraft and balloon measurements from the SOLVE/THESE02000 Arctic campaign. The method may be used to refine the Nash algorithm, which, due to the inherently coarser resolution of potential vorticity on which it is dependent, may misidentify the inner edge by up to 466 km, and omit the identification of small, extra-vortex filaments within the vortex.
Document ID
20010050101
Acquisition Source
Ames Research Center
Document Type
Preprint (Draft being sent to journal)
Authors
Greenblatt, Jeffery B.
(NASA Ames Research Center Moffett Field, CA United States)
Jost, Hans-Juerg
(NASA Ames Research Center Moffett Field, CA United States)
Loewenstein, Max
(NASA Ames Research Center Moffett Field, CA United States)
Podolske, James R.
(NASA Ames Research Center Moffett Field, CA United States)
Bui, T. Paul
(NASA Ames Research Center Moffett Field, CA United States)
Hurst, Dale F.
(National Oceanic and Atmospheric Administration Boulder, CO United States)
Elkins, James W.
(National Oceanic and Atmospheric Administration Boulder, CO United States)
Herman, Robert L.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Webster, Christopher R.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Schauffler, Sue M.
(University Corp. for Atmospheric Research Boulder, CO United States)
Hipskind, R. Stephen
Date Acquired
August 20, 2013
Publication Date
January 1, 2001
Subject Category
Fluid Mechanics And Thermodynamics
Funding Number(s)
PROJECT: RTOP 622-65-15-10
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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