文章基本信息

标题：A utilização de índices de estabilidade no estudo de situações convectivas: o exemplo dos temporais de Outono de 1997, em Lisboa
本地全文：下载
作者：Marcelo Fragoso
期刊名称：Finisterra : Revista Portuguesa de Geografia
印刷版ISSN：0430-5027
出版年度：2012
卷号：33
期号：66
页码：59
DOI：10.18055/Finis1700
出版社：Centro de Estudos Geográficos, University of Lisbon
摘要：THE USE OF STABILITY INDICES IN THE STUDY OF CONVECTIVE SITUATIONS: THE CASE OF 1997 AUTUMN STORMS, IN LISBON - The autumn of 1997 in Portugal was remarkable for the occurance of several situations of storms, some of them with tragic consequences, as they caused floods with casualties and enormous damages. In Lisbon, four heavy rainfall events accurred from the 18th October to 3rd November and we want to investigate the thermodynamic condtions of these severe storms to deepen our knowledge of these situations with regard to climate. For this purpose, several stability indices communly used in thunderstorm forecasting were calculated. We concluded that they are useful to measure the degree of instability of certain atmospheric situations, bur more applications must be made in order to define some significative thresholds for the indices concerning southern Portugal.