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TOMS total ozone trends in potential vorticity coordinates
Author(s) -
Randel William J.,
Wu Fei
Publication year - 1995
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 - 10.1029/94gl02790
Subject(s) - total ozone mapping spectrometer , potential vorticity , polar vortex , ozone , atmospheric sciences , vortex , environmental science , vorticity , ozone depletion , middle latitudes , stratosphere , volcano , climatology , meteorology , ozone layer , physics , geology , seismology
Global total ozone measurements from the Nimbus 7 Total Ozone Mapping Spectrometer (TOMS) are analyzed using potential vorticity (PV) as an approximate vortex‐following coordinate. We analyze the time period November 1978–May 1991, prior to the volcanic eruption of Mt. Pinatubo. The TOMS data are remapped into PV coordinates and trends are calculated, thereby characterizing ozone losses inside and outside the winter polar vortices. These analyses show large regions of ozone loss outside of the vortex in both hemispheres. Furthermore, these data suggest that midlatitude losses in the NH during winter‐spring do not result solely from the transport of ozone depleted air from inside to outside the vortex.