Reconstruction of Lamb weather type series back to the eighteenth century

Delaygue, Gilles, Brönnimann, Stefan, Jones, Philip D., Blanchet, Juliette and Schwander, Mikhaël (2018) Reconstruction of Lamb weather type series back to the eighteenth century. Climate Dynamics. ISSN 0930-7575

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    Abstract

    The Lamb weather type series is a subjective catalogue of daily atmospheric patterns and flow directions over the British Isles, covering the period 1861–1996. Based on synoptic maps, meteorologists have empirically classified surface pressure patterns over this area, which is a key area for the progression of Atlantic storm tracks towards Europe. We apply this classification to a set of daily pressure series from a few stations from western Europe, in order to reconstruct and to extend this daily weather type series back to 1781. We describe a statistical framework which provides, for each day, the weather types consistent enough with the observed pressure pattern, and their respective probability. Overall, this technique can correctly reconstruct almost 75% of the Lamb daily types, when simplified to the seven main weather types. The weather type series are described and compared to the original series for the winter season only. Since the low frequency variability of synoptic conditions is directly related to the North Atlantic Oscillation (NAO), we derive from the weather type series an NAO index for winter. An interesting feature is a larger multidecadal variability during the nineteenth century than during the twentieth century.

    Item Type: Article
    Uncontrolled Keywords: lamb weather types,british isles weather,climate reconstruction,little ice age,north atlantic oscillation
    Faculty \ School: Faculty of Science > School of Environmental Sciences
    Related URLs:
    Depositing User: LivePure Connector
    Date Deposited: 03 Dec 2018 16:30
    Last Modified: 03 Dec 2018 16:31
    URI: https://ueaeprints.uea.ac.uk/id/eprint/69146
    DOI: 10.1007/s00382-018-4506-7

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