The Effects of Different Sudden Stratospheric Warming Type on the Ocean:Ocean Impacts of SSWs

O'Callaghan, Amee, Joshi, Manoj, Stevens, David and Mitchell, Daniel (2014) The Effects of Different Sudden Stratospheric Warming Type on the Ocean:Ocean Impacts of SSWs. Geophysical Research Letters, 41 (21). 7739–7745. ISSN 0094-8276

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      There is a confirmed link between sudden stratospheric warmings (SSWs) and surface weather. Here we find significant differences in the strength of surface and ocean responses for splitting and displacement SSWs, classified using a new straightforward moment analysis technique. In an intermediate general circulation model splitting SSWs possess an enhanced ability to affect the surface climate demonstrating the need to treat the two types individually. Following SSWs the North Atlantic surface wind stress curl weakens, compared to its climatological winter state, for over 30 days: this is also evident in NCEP/NCAR reanalysis. The effect of anomalies associated with SSWs on the ocean is analysed in the Intermediate General Circulation Model 4. The splitting SSW composite displays strong anomalies in the implied Ekman heat flux and net atmosphere-surface flux, modifying the mixed layer heat budget. Our results highlight that different SSW types need to be simulated in coupled stratospheric/tropospheric/ocean models.

      Item Type: Article
      Additional Information: ©2014. The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
      Uncontrolled Keywords: sudden stratospheric warming,ssw,atmosphere-ocean interaction,stratopshere-troposphere interaction,northern annual mode,nam
      Faculty \ School: Faculty of Science > School of Environmental Sciences
      Faculty of Science > School of Mathematics
      Depositing User: Pure Connector
      Date Deposited: 02 Jan 2015 12:54
      Last Modified: 24 Sep 2018 11:30
      DOI: 10.1002/2014GL062179

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