Winter temperature covariances in the middle and the lower troposphere over Europe and the North Atlantic Ocean (Journal article)

Lolis, C. J./ Bartzokas, A.


In this work, the variability and covariability of winter temperatures in the middle and the lower troposphere are studied over Europe and the North Atlantic Ocean. Temperature variations of the middle and the lower troposphere are examined in terms of (a) 500-700 hPa and 700-1000 kPa thickness and Cb) air temperature on the isobaric surfaces of 500 hPa and 700 hPa. At first, factor analysis (FA) defined areas with characteristic temperature variability in each layer land on each isobaric surface) and then, canonical correlation analysis (CCA) revealed areas in both layers land on both isobaric surfaces) presenting common temperature variations. A temperature see-saw between N Europe and W Asia was revealed for both layers and isobaric surfaces implying that temperature changes in these areas are vertically spread. Another well-defined area, appearing in both analyses, is the area of the Labrador Sea and S Greenland. This region is also teleconnected to other regions, though not very clearly in every height. These temperature patterns are mainly attributed to the Eurasian (EU) and North Atlantic Oscillation (NAO) circulation patterns, which are responsible for large air mass exchanges in the area, being vertically extended in the middle and the lower troposphere. Copyright (C) 2001 Royal Meteorological Society.
Institution and School/Department of submitter: Πανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών και Τεχνολογιών. Τμήμα Βιολογικών Εφαρμογών και Τεχνολογιών
Keywords: air temperature variability,canonical correlation analysis,europe and north atlantic ocean,factor analysis,middle and lower troposphere,principal component analysis,sea-surface temperature,atmospheric circulation,height field,hemisphere,satellite,anomalies,precipitation,variability,patterns
URI: http://olympias.lib.uoi.gr/jspui/handle/123456789/16416
ISSN: 0899-8418
Link: <Go to ISI>://000169126200002
http://onlinelibrary.wiley.com/store/10.1002/joc.651/asset/651_ftp.pdf?v=1&t=hfwdvwph&s=3d5587d349391cc9b51c1e96fa90e618a84c5234
Appears in Collections:Άρθρα σε επιστημονικά περιοδικά ( Ανοικτά)

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