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Frequency, intensity, and duration of thermal inversions in the Jura Mountains of France

By Daniel Joly and Yves Richard


International audienceThis analysis of the frequency, intensity, and duration of thermal inversions is based on daily minimum (tn) and maximum (tx) temperatures recorded over 3 years at 16 pairs of data loggers located under forest cover in the Jura Mountains of France. Each pair consists of a logger located at the bottom of a depression and another located higher up either nearby (local site) or more than 40 km away (regional site). The daily frequency of inversions is maximum at local sites for tn (50%) and minimum for tx at regional sites (4%). The maximum intensity of the inversions reaches 15.1 °C for tn and 16.2 °C for tx. The average intensity is about 2 °C: 1.5 °C for tx at local sites and 2.4 °C at regional sites. The duration of inversions is generally short: 60% of them last less than a day. Of the inversions that last for more than 1 day, 15% exceed 3 days and the maximum duration observed is 22 days. The relationship between the diurnal amplitude of temperature and the frequency, intensity, and duration of inversions indicates that mesoscale atmospheric conditions directly influence inversions

Topics: Temperature, [SHS.GEO]Humanities and Social Sciences/Geography
Publisher: 'Springer Science and Business Media LLC'
Year: 2019
DOI identifier: 10.1007/s00704-019-02855-3
OAI identifier: oai:HAL:hal-02099980v1
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