Climatological assessment of atmospheric instability indices for southeastern Europe

Pages:

p. 307

National and Kapodistrian University of Athens, Department of Physics, Division of Environmental Physics and Meteorology, 15784, Athens, Greece

George Karvounis

National and Kapodistrian University of Athens, Department of Physics, Division of Environmental Physics and Meteorology, 15784, Athens, Greece

Despina Deligiorgi

National and Kapodistrian University of Athens, Department of Physics, Division of Environmental Physics and Meteorology, 15784, Athens, Greece

Abstract:

Atmospheric instability indices are routinely used in operational forecasting for identifying the possibility of convective storm activity. This study focuses on the long-term temporal assessment of Showalter Index, SWEAT Index, K- Index and CAPE at three coastal (Athens, Istanbul and Brindisi) and at one inland station (Sofia) of southeastern Europe. The indices are calculated from daily archived radiosonde observations for a 36-year period, from 1973 to 2008. In order to identify meaningful temporal trends, a two-phase methodology is applied. The first step contains the assessment of the monthly, seasonal and yearly averages. The yearly trends of Showalter and SWEAT indices indicate an increase of atmospheric instability mean values for Athens, Brindisi and Sofia after mid 1990s. The second step, which is the primary focus of this study, is the assessment of index extremes. After the selection of index threshold levels, index extremes are studied in terms of threshold exceedences. The analysis reveals long term trends for some combinations of indices and stations.

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Climatological assessment of atmospheric instability indices for southeastern Europe

VOLUME 39 (1-2)/September 2010 XIX Congress of the Carpathian-Balkan Geological Association Thessaloniki, Greece, 23-26 September 2010

Maria Economou-EliopoulosDepartment of Geology and Geoenvironment, University of Athens, Panepistimiopolis, 15784 Athens GR

Ioan SeghediInstitute of Geodynamics, 19-21, Jean-Luis Calderon str., Bucharest 020032, Romania

Gérard StampfliInstitut de Géologie et Paléontologie, Université de Lausanne – Anthropole, CH 1015 Lausannne, Switzerland

Alexandru AndrasanuDepartment of Geology and Palaeontology, Faculty of Geology and Geophysics, University of Bucharest, 1 Nicolae Balcescu Bd., sect.1, Bucharest, Romania

Ion ArgyriadisCERGEM (Euro mediterranean geological Studies and Research Center). 975 ch. du Pré de Caune, 83740 La Cadière d'Azur, France

Kürşad AsanDepartment of Geological Engineering, Selçuk University, Konya, 42079, Türkiye | Hüseyin KurtDepartment of Geological Engineering, Selçuk University, Konya, 42079, Türkiye

Argyro AsvestaDepartment of Geotechnology and Environmental Engineering, Technological Educational Institute (TEI) of West Macedonia, Kila, 50100 Kozani, Greece | Sarantis DimitriadisSchool of Geology, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece

Athanassios AthanassiouHellenic Ministry of Culture, Department of Palaeoanthropology–Speleology, Ardittou 34B, 116 36 Athens, Greece | Dimitris BouzasHellenic Ministry of Culture, Department of Palaeoanthropology–Speleology, Ardittou 34B, 116 36 Athens, Greece

Athanassios AthanassiouMinistry of Culture, Ephorate of Palaeoanthropology–Speleology, Ardittou 34B, 116 36 Athens, Greece | Dimitris KostopoulosUniversity of Thessaloniki, Department of Geology, 54124 Thessaloniki, Greece

Artemios AtzemoglouInstitute of Geology and Mineral Exploration, 54626 Thessaloniki, Greece, | Panagiotis TsourlosDepartment of Geophysics, school of Geology, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece,

Krisztina BabákDepartment of General and Applied Environmental Geography, Institute of Geography, University of Pécs, 7624, Pécs, Ifjúság útja 6., Hungary

Vassil BalinovUniversity of Mining and Geology, Stoudentski grad, 1700 Sofia, Bulgaria | Mariana DonchevaUniversity of Mining and Geology, Stoudentski grad, 1700 Sofia, Bulgaria | Efrosima Zaneva-DobranovaUniversity of Mining and Geology, Stoudentski grad, 1700 Sofia, Bulgaria

Alexey BaranovInstitute of Physics of the Earth, 123995, Moscow, Russia, B. Gruzinskaya 10 | Valeriy TrubitsynInstitute of Physics of the Earth, 123995, Moscow, Russia, B. Gruzinskaya 10 | Alexander TrubitsynInstitute of Physics of the Earth, 123995, Moscow, Russia, B. Gruzinskaya 10

Mehrdad BaratiDepartment of Geology, Faculty of Science, Bu-Ali Sina University, 65174, Hamedan, Iran | Insung LeeSeoul National University, Korea

Anikó BatkiDepartment of Mineralogy, Geochemistry and Petrology, University of Szeged, H-6701, POBox 651., Szeged, Hungary | Elemér Pál-MolnárDepartment of Mineralogy, Geochemistry and Petrology, University of Szeged, H-6701, POBox 651., Szeged, Hungary

Peter BaumgartnerInstitut de Géologie et Paléontologie, Université de Lausanne, 1015 Lausanne, Switzerland | Špela GoričanInstitute of Paleontology, ZRC SAZU, Novi trg 2, SI-1000 Ljubljana, Slovenia | Marko ChiariCNR - Istituto di Geoscienze e Georisorse, Via G. La Pira 4, 50121 Firenze, Italy

Ali BayramDepartment of Geology Engineering, Engineering and Architecture Faculty, Selcuk University, 42079, Konya, Turkey

Lucian BesutiuSolid Earth Dynamics Department, Institute of Geodynamics of the Romanian Academy, 19-21, Jean-Louis Calderon St., 020032 Bucharest

Gabriel BindeaGeological Institute of Romania, Caransebes str. 1, 012271 Bucharest, Romania

Julita Biszczuk-JakubowskaCentre of Aerology, Institute of Meteorology and Water Management, Zegrzynska 38, 05-119 Legionowo, Poland

Jennifer BoothSchool of Geography and the Environment, OUCE, South Parks Road, Oxford, OX1 3QY, United Kingdom

Nikola BotoucharovDepartment of Geology, Paleontology and Fossil Fuels, Sofia University “St. Kliment Ohridski”, 1504, Sofia, Bulgaria | Hristo Chemberski

Nikita BraginGeological Institute of Russian Academy of Sciences, Pyzhevsky 7, Moscow 119017, Russia | Liubov BraginaGeological Institute of Russian Academy of Sciences, Pyzhevsky 7, Moscow 119017, Russia

Liubov BraginaGeological Institute of Russian Academy of Sciences, Pyzhevsky 7, Moscow 119017, Russia | Nikita BraginGeological Institute of Russian Academy of Sciences, Pyzhevsky 7, Moscow 119017, Russia

Aynur BüyükutkuDepartment of Geological Engineering, Faculty of Engineering, Ankara University, 06100, Beşevler, Ankara, Turkey

Nicoleta CadicheanuInstitute of Geodynamics of the Romanian Academy, 19-21, Jean-Louis Calderon St., Bucharest-37, 020032, Romania | Michel van RuymbekeRoyal Observatory of Belgium, ORB-avenue circulaire 3, 1180, Bruxelles, Belgium

William CavazzaDept. of Earth and Geoenvironmental Sciences, University of Bologna, Italy | Aral OkayEurasia Institute of Earth Sciences and Dept. of Geology, Istanbul Technical University, Turkey | Massimiliano ZattinDept. of Geosciences, University of Padua, Italy

Aura CehlarofGeology-Geophysics Department, Petroleum-Gas University of Ploiesti, 100680, Ploiesti, Romania

Yakup ÇelikIstanbul University, Department of Geological Engineering, Avcılar, TR-34320 İstanbul, Turkey

Valentina CeteanProcema Geologi S.R.L., Preciziei street, No.6, RO-062203 Bucharest, Romania | Laszlo SzéllProcema Cercetare S.R.L., Cluj-Napoca, Beiusului street, No. 1, RO-400394 Cluj county, Romania | Neculai CiorneiProcema Geologi S.R.L., Preciziei street, No.6, RO-062203 Bucharest, Romania

Maria ChatziangelouDepartment of Geology, School of Geology, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece | Basile ChristarasDepartment of Geology, School of Geology, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece

Maria Economou-Eliopoulos
Department of Geology and Geoenvironment, University of Athens, Panepistimiopolis, 15784 Athens GR

Ioan Seghedi
Institute of Geodynamics, 19-21, Jean-Luis Calderon str., Bucharest 020032, Romania

Gérard Stampfli
Institut de Géologie et Paléontologie, Université de Lausanne – Anthropole, CH 1015 Lausannne, Switzerland

Alexandru Andrasanu
Department of Geology and Palaeontology, Faculty of Geology and Geophysics, University of Bucharest, 1 Nicolae Balcescu Bd., sect.1, Bucharest, Romania

Ion Argyriadis
CERGEM (Euro mediterranean geological Studies and Research Center). 975 ch. du Pré de Caune, 83740 La Cadière d'Azur, France

Kürşad Asan
Department of Geological Engineering, Selçuk University, Konya, 42079, Türkiye

|

Hüseyin Kurt
Department of Geological Engineering, Selçuk University, Konya, 42079, Türkiye

Argyro Asvesta
Department of Geotechnology and Environmental Engineering, Technological Educational Institute (TEI) of West Macedonia, Kila, 50100 Kozani, Greece

|

Sarantis Dimitriadis
School of Geology, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece

Athanassios Athanassiou
Hellenic Ministry of Culture, Department of Palaeoanthropology–Speleology, Ardittou 34B, 116 36 Athens, Greece

|

Dimitris Bouzas
Hellenic Ministry of Culture, Department of Palaeoanthropology–Speleology, Ardittou 34B, 116 36 Athens, Greece

Athanassios Athanassiou
Ministry of Culture, Ephorate of Palaeoanthropology–Speleology, Ardittou 34B, 116 36 Athens, Greece

|

Dimitris Kostopoulos
University of Thessaloniki, Department of Geology, 54124 Thessaloniki, Greece

Artemios Atzemoglou
Institute of Geology and Mineral Exploration, 54626 Thessaloniki, Greece,

|

Panagiotis Tsourlos
Department of Geophysics, school of Geology, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece,

Krisztina Babák
Department of General and Applied Environmental Geography, Institute of Geography, University of Pécs, 7624, Pécs, Ifjúság útja 6., Hungary

Vassil Balinov
University of Mining and Geology, Stoudentski grad, 1700 Sofia, Bulgaria

|

Mariana Doncheva
University of Mining and Geology, Stoudentski grad, 1700 Sofia, Bulgaria

|

Efrosima Zaneva-Dobranova
University of Mining and Geology, Stoudentski grad, 1700 Sofia, Bulgaria

Alexey Baranov
Institute of Physics of the Earth, 123995, Moscow, Russia, B. Gruzinskaya 10

|

Valeriy Trubitsyn
Institute of Physics of the Earth, 123995, Moscow, Russia, B. Gruzinskaya 10

|

Alexander Trubitsyn
Institute of Physics of the Earth, 123995, Moscow, Russia, B. Gruzinskaya 10

Mehrdad Barati
Department of Geology, Faculty of Science, Bu-Ali Sina University, 65174, Hamedan, Iran

|

Insung Lee
Seoul National University, Korea

Anikó Batki
Department of Mineralogy, Geochemistry and Petrology, University of Szeged, H-6701, POBox 651., Szeged, Hungary

|

Elemér Pál-Molnár
Department of Mineralogy, Geochemistry and Petrology, University of Szeged, H-6701, POBox 651., Szeged, Hungary

Ali Bayram
Department of Geology Engineering, Engineering and Architecture Faculty, Selcuk University, 42079, Konya, Turkey

Lucian Besutiu
Solid Earth Dynamics Department, Institute of Geodynamics of the Romanian Academy, 19-21, Jean-Louis Calderon St., 020032 Bucharest

Gabriel Bindea
Geological Institute of Romania, Caransebes str. 1, 012271 Bucharest, Romania

Julita Biszczuk-Jakubowska
Centre of Aerology, Institute of Meteorology and Water Management, Zegrzynska 38, 05-119 Legionowo, Poland

Jennifer Booth
School of Geography and the Environment, OUCE, South Parks Road, Oxford, OX1 3QY, United Kingdom

Nikola Botoucharov
Department of Geology, Paleontology and Fossil Fuels, Sofia University “St. Kliment Ohridski”, 1504, Sofia, Bulgaria

|

Hristo Chemberski

Nikita Bragin
Geological Institute of Russian Academy of Sciences, Pyzhevsky 7, Moscow 119017, Russia

|

Liubov Bragina
Geological Institute of Russian Academy of Sciences, Pyzhevsky 7, Moscow 119017, Russia

Liubov Bragina
Geological Institute of Russian Academy of Sciences, Pyzhevsky 7, Moscow 119017, Russia

|

Nikita Bragin
Geological Institute of Russian Academy of Sciences, Pyzhevsky 7, Moscow 119017, Russia

Aynur Büyükutku
Department of Geological Engineering, Faculty of Engineering, Ankara University, 06100, Beşevler, Ankara, Turkey

Nicoleta Cadicheanu
Institute of Geodynamics of the Romanian Academy, 19-21, Jean-Louis Calderon St., Bucharest-37, 020032, Romania

|

Michel van Ruymbeke
Royal Observatory of Belgium, ORB-avenue circulaire 3, 1180, Bruxelles, Belgium

William Cavazza
Dept. of Earth and Geoenvironmental Sciences, University of Bologna, Italy

|

Aral Okay
Eurasia Institute of Earth Sciences and Dept. of Geology, Istanbul Technical University, Turkey

|

Massimiliano Zattin
Dept. of Geosciences, University of Padua, Italy

Aura Cehlarof
Geology-Geophysics Department, Petroleum-Gas University of Ploiesti, 100680, Ploiesti, Romania

Yakup Çelik
Istanbul University, Department of Geological Engineering, Avcılar, TR-34320 İstanbul, Turkey

Maria Chatziangelou
Department of Geology, School of Geology, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece

|

Basile Christaras
Department of Geology, School of Geology, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece