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Impact of the extratropical dynamical modes upon troposphere temperature using an approach based on advection of temperature
Author(s) -
Gimeno Luis,
Vidal Oscar,
Nieto Raquel,
de la Torre Laura,
García Ricardo,
Hernández Emiliano,
Bojariu Roxana,
Ribera Pedro,
Gallego David
Publication year - 2003
Publication title -
international journal of climatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.58
H-Index - 166
eISSN - 1097-0088
pISSN - 0899-8418
DOI - 10.1002/joc.885
Subject(s) - extratropical cyclone , climatology , northern hemisphere , troposphere , advection , environmental science , arctic oscillation , atmospheric circulation , series (stratigraphy) , madden–julian oscillation , oscillation (cell signaling) , the arctic , atmospheric sciences , meteorology , geology , geography , convection , physics , paleontology , oceanography , genetics , biology , thermodynamics
Advection of temperature (AT) is used to diagnose the influence of changes in extratropical atmospheric circulation on air temperature. AT is calculated at three different pressure levels (850, 500 and 200 hPa) for the period 1958–98 using NCEP–NCAR reanalysis data. Global and hemispheric annual series of AT have a common feature consisting of positive values and trends at 850 and 500 hPa and negative values and trends at 200 hPa, together with quasi‐biennial and quasi‐quadrennial oscillations for most of the series. Significant correlations were found between most of the Northern Hemisphere and global AT series with the Arctic oscillation and between most of the Southern Hemisphere and global AT series with the Antarctic oscillation. Copyright © 2003 Royal Meteorological Society