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An Arctic inversion climatology based on the European Centre Reanalysis ERA-40

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A low-level temperature inversion is a frequent phenomenon in the Arctic boundary layer as known from various observational sources and is investigated in a number of studies. These investigations, however, focus on certain regions and are based on limited observational periods. In this paper, a coherent (in space and time) climatology of the boundary-layer inversion in the Arctic (>60°N) is presented for the first time using the six-hourly ERA-40 reanalysis data for the period 1957–2002. The frequency of inversion occurrence and the height, depth and strength of the inversion are analysed. The investigation concentrates on the spatial distribution of the inversion characteristics in various regions of the Arctic, on the mean annual cycle and the inter-annual variability and the long-term trends.

Aus diversen Beobachtungen ist bekannt, dass eine Temperaturinversion in niedriger Höhe ein häufiges Phänomen der arktischen atmosphärischen Grenzschicht ist. Jedoch sind diese Beobachtungen in Raum und Zeit beschränkt. In dieser Arbeit wird zum ersten Mal eine in Raum und Zeit kohärente Klimatologie der Grenzschichtinversion in der Arktis (>60°N) auf Basis der sechs-stündlichen ERA-40-Reanalysen für den Zeitraum 1957–2002 vorgestellt. Es werden die Häufigkeit des Auftretens und die Eigenschaften der Inversion, Höhe der Untergrenze, Mächtigkeit und Temperaturzunahme, analysiert. Die Untersuchungen konzentrieren sich auf die räumlichen Verteilungen der Inversionscharakteristika in verschiedenen Regionen der Arktis, auf den mittleren Jahresgang sowie auf die zwischenjährliche Variabilität und die langzeitlichen Trends.
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Document Type: Research Article

Publication date: 2011-12-01

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  • Meteorologische Zeitschrift (originally founded in 1866) is the joint periodical of the meteorological societies of Austria, Germany and Switzerland. It accepts high-quality peer-reviewed manuscripts on all aspects of observational, theoretical and computational research out of the entire field of meteorology, including climatology. Meteorologische Zeitschrift represents a natural forum for the meteorological community of Central Europe and worldwide.
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