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Title: Factors inhibiting convection under conditions of extreme atmospheric instability


Palarz, Angelika ; Celiński-Mysław, Daniel

Date issued/created:


Resource type:



Geographia Polonica Vol. 90 No. 1 (2017)



Place of publishing:



24 cm

Degree grantor:

convection inhibition ; atmospheric instability indices ; Poland ; upper air sounding

Type of object:



The paper identifies mechanisms that potentially inhibit convection at a time when extreme values of selected atmospheric instability indices are recorded. The study involved six indices (LI, SI, CAPE, KI, SWEAT, TTI). Data sources involved records from three Polish data stations collecting upper air soundings and covered the period 2005-2014. Additional data were obtained from SYNOP codes on present and past weather and reports on severe meteorological phenomena from the European Severe Weather Database. The methodology adopted allowed the selection of 26 cases where no convective phenomena were observed despite extreme atmospheric instability. A detailed analysis demonstrated that the occurrence of isothermal or inversion layers in the lower and middle troposphere were the most frequent mechanisms inhibiting the vertical air movement. Convection was also inhibited when the area was free from the influence of atmospheric fronts, convergence zones, lowpressure troughs or when high altitudes of LCL occurred.


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Geographia Polonica





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File size 4,1 MB ; application/pdf

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oai:rcin.org.pl:61909 ; 0016-7282 ; 10.7163/GPol.0077


CBGiOS. IGiPZ PAN, call nos.: Cz.2085, Cz.2173, Cz.2406 ; click here to follow the link




Creative Commons Attribution BY-SA 3.0 PL license

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Copyright-protected material. [CC BY-SA 3.0 PL] May be used within the scope specified in Creative Commons Attribution BY-SA 3.0 PL license, full text available at: ; -

Digitizing institution:

Institute of Geography and Spatial Organization of the Polish Academy of Sciences

Original in:

Central Library of Geography and Environmental Protection. Institute of Geography and Spatial Organization PAS

Projects co-financed by:

European Union. European Regional Development Fund ; Programme Innovative Economy, 2010-2014, Priority Axis 2. R&D infrastructure



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Mar 25, 2021

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Mar 15, 2017

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