Changing summer precipitation variability in the Alpine region: on the role of scale dependent atmospheric drivers.

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  • Additional Information
    • Source:
      Publisher: Springer-International Country of Publication: Germany NLM ID: 101625237 Publication Model: Print-Electronic Cited Medium: Print ISSN: 0930-7575 (Print) Linking ISSN: 09307575 NLM ISO Abbreviation: Clim Dyn Subsets: PubMed not MEDLINE
    • Publication Information:
      Original Publication: [Heidelberg] : Springer-International, [c1986-
    • Abstract:
      Summer precipitation totals in the Alpine Region do not exhibit a systematic trend over the last 120 years. However, we find significant low frequency periodicity of interannual variability which occurs in synchronization with a dominant two-phase state of the atmospheric circulation over the Alps. Enhanced meridional flow increases precipitation variability through positive soil moisture precipitation feedbacks on the regional scale, whereas enhanced zonal flow results in less variability through constant moisture flow from the Atlantic and suppressed feedbacks with the land surface. The dominant state of the atmospheric circulation over the Alps in these periods appears to be steered by zonal sea surface temperature gradients in the mid-latitude North Atlantic. The strength and the location of the westerlies in the mid-latitude Atlantic play an important role in the physical mechanisms linking atmosphere and oceanic temperature gradients and the meridional/zonal circulation characteristics.
      Competing Interests: Conflicts of interestThe authors declare no conflicts of interest.
      (© The Author(s) 2021.)
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    • Publication Date:
      Date Created: 20211101 Latest Revision: 20211102
    • Publication Date:
      20240105
    • Accession Number:
      PMC8550189
    • Accession Number:
      10.1007/s00382-021-05753-5
    • Accession Number:
      34720434