Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Accueil du site → Doctorat → Israel → Climate changes over the E. Mediterranean - a synoptic systems classification approach

University of Tel-Aviv (2006)

Climate changes over the E. Mediterranean - a synoptic systems classification approach

Osetinsky, Isabella

Titre : Climate changes over the E. Mediterranean - a synoptic systems classification approach

Auteur : Osetinsky, Isabella

Université de soutenance : University of Tel-Aviv

Grade : Doctor of Philosophy 2006

Résumé partiel
In the present work, the Eastern Mediterranean (EM) climate is studied by means of synoptic climatology that considers weather and climate through the typical regional synoptic systems, or weather types. These are well-defined macro-units of global atmospheric circulation. The entire variety of synoptic systems over any region may usually be classified up to about two dozens of different types. These are convenient to deal with and to understand, rather than a large number of meteorological raw information, on the one hand side, or averaged data, on the other. The synoptic analysis carried out in this work is mainly based on the statistical properties of the EM surface synoptic systems, namely on their frequency of occurrence. The EM surface synoptic systems are grouped into the Red Sea Troughs, mainly occurring for the fall season but continuing toward spring through winter ; Winter Lows, or Mediterranean cyclones, mainly in winter ; Persian Troughs, summer ; Sharav Lows, mainly in spring ; and Highs, round the year. Within each group, there is a further finer division. In total, 19 various EM synoptic systems are considered. To start with, the procedure for an automatic synoptic classification for a long-term period was developed, applied to the NCEP/NCAR reanalysis data and verified. The input includes the 2.5°×2.5°- gridded fields of the geopotential height, temperature, and both horizontal wind components over the EM region, defined as within a square of 27.5°N - 37.5°N, 30°E - 40°E, at 1000-hPa level at 1200 UTC, daily since 1 Jan 1948

Mots Clés : Climatic changes — Mediterranean Region. — Synoptic climatology

Présentation (TAU)

vVrsion intégrale (1,96 MB)

Page publiée le 10 janvier 2012, mise à jour le 23 novembre 2018