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High‐resolution measurements and simulation of stratospheric and tropospheric intrusions in the vicinity of the polar jet stream
Author(s) -
Beuermann Jürgen,
Konopka Paul,
Brunner Dominik,
Bujok Oliver,
Günther Gebhard,
McKenna Daniel S.,
Lelieveld Jos,
Müller Rolf,
Schiller Cornelius
Publication year - 2002
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2001gl014162
Subject(s) - troposphere , stratosphere , tropopause , potential vorticity , atmospheric sciences , jet stream , polar , environmental science , polar vortex , tracer , geology , jet (fluid) , climatology , physics , meteorology , vorticity , vortex , astronomy , thermodynamics , nuclear physics
Pronounced filamentation of tropospheric and stratospheric air masses was observed on a flight in the vicinity of the polar jet stream during the STREAM 1998 campaign in Timmins, Canada. High‐spatial resolution O 3 and H 2 O measurements showed highly variable structures for the investigated region. Reconstructing high‐resolution potential vorticity (PV) fields using the reverse‐domain‐filling (RDF) technique reproduce the in‐situ O 3 measurements qualitatively. Measurements and RDF results show the intrusion of stratospheric air penetrating deep into the troposphere. The observed intrusions occur on smaller horizontal scales than generally assumed for tropopause folding events. Moreover, fine‐scale structures of tropospheric air masses being lifted up into the stratosphere could be reconstructed by the RDF technique using the tropospheric tracer specific humidity in addition to the more conventional calculations for the stratospheric tracer PV.