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The surface of maximum wind as an alternative to the isobaric surface for wind climatology
Author(s) -
Strong Courtenay,
Davis Robert E.
Publication year - 2005
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 - 10.1029/2004gl022039
Subject(s) - jet stream , troposphere , climatology , environmental science , tropopause , atmospheric sciences , stratosphere , geopotential height , climate model , jet (fluid) , meteorology , geology , climate change , physics , precipitation , oceanography , thermodynamics
The surface of maximum wind (SMW) is introduced as an analysis frame for climate studies of fast upper tropospheric winds. As defined here, the vertical domain for the SMW includes the troposphere above 500 hPa and upper tropospheric jet streams that may protrude into the lower stratosphere. We use NCEP‐NCAR Reanalysis data for summers 1958–2004 in the vicinity of the tropical easterly jet (TEJ) to show how the spatial and temporal variability of the SMW relate to jet stream cores and the tropopause. We then compare the SMW climatology of the TEJ to an isobaric climatology of the TEJ, demonstrating that the SMW climatology reveals descent and slowing of the TEJ over the period of record, whereas the isobaric climatology provides only an overestimate of the TEJ slowing trend.