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Browsing Bergen Open Research Archive by Author "Dunn-Sigouin, Etienne"

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    • Dynamics of anomalous stratospheric eddy heat flux events in an idealized model 

      Dunn-Sigouin, Etienne; Shaw, Tiffany (Journal article; Peer reviewed, 2020-05-28)
      Extreme stratospheric eddy and sudden stratospheric warming (SSW) events both involve anomalous stratospheric eddy heat flux. The cause of the anomaly has been hypothesized to be due to tropospheric or stratospheric dynamics. ...
    • Impacts of Greenland Block Location on Clouds and Surface Energy Fluxes over the Greenland Ice Sheet 

      Ward, Jamie; Flanner, Mark G.; Dunn-Sigouin, Etienne (Journal article; Peer reviewed, 2020)
      Clouds and blocking activity have been implicated as causes of increased Greenland Ice Sheet (GrIS) melt in the 21st century. Although Greenland blocks (i.e., long-lasting, mostly stationary anticyclones) generally reduce ...
    • Limited Influence of Localized Tropical Sea-Surface Temperatures on Moisture Transport into the Arctic 

      Dunn-Sigouin, Etienne; Li, Camille; Kushner, Paul J. (Journal article; Peer reviewed, 2021)
      Arctic moisture transport is dominated by planetary-scale waves in reanalysis. Planetary waves are influenced by localized Sea-Surface Temperature (SST) features such as the tropical warm pool. Here, an aquaplanet model ...
    • Nonlinear response of atmospheric blocking to early Winter Barents-Kara seas warming: An idealized model study 

      Chen, Xiaodan; Luo, Dehai; Wu, Yutian; Dunn-Sigouin, Etienne; Lu, Jian (Journal article; Peer reviewed, 2021)
      Wintertime Ural blocking (UB) has been shown to play an important role in cold extremes over Eurasia, and thus it is useful to investigate the impact of warming over the Barents–Kara Seas (BKS) on the behavior of Ural ...
    • The Role of the Stratosphere in Subseasonal to Seasonal Prediction: 1. Predictability of the Stratosphere 

      Domeisen, Daniela; Butler, Amy; Charlton-Perez, Andrew; Ayarzaguena, Blanca; Baldwin, Mark; Dunn-Sigouin, Etienne; Furtado, Jason; Garfinkel, Chaim; Hitchcock, Peter; Karpechko, Alexey; Kim, Hera; Knight, Jeff; Lang, Andrea; Lim, Eun-Pa; Marshall, Andrew; Roff, Greg; Schwartz, Chen; Simpson, Isla; Son, Seok-Woo; Taguchi, Masakazu (Journal article; Peer reviewed, 2019-11-18)
      The stratosphere has been identified as an important source of predictability for a range of processes on subseasonal to seasonal (S2S) time scales. Knowledge about S2S predictability within the stratosphere is however ...
    • The Role of the Stratosphere in Subseasonal to Seasonal Prediction: 2. Predictability Arising From Stratosphere-Troposphere Coupling 

      Domeisen, Daniela; Butler, Amy; Charlton-Perez, Andrew; Ayarzaguena, Blanca; Baldwin, Mark; Dunn-Sigouin, Etienne; Furtado, Jason; Garfinkel, Chaim; Hitchcock, Peter; Karpechko, Alexey; Kim, Hera; Knight, Jeff; Lang, Andrea; Lim, Eun-Pa; Marshall, Andrew; Roff, Greg; Schwartz, Chen; Simpson, Isla; Son, Seok-Woo; Taguchi, Masakazu (Journal article; Peer reviewed, 2020)
      The stratosphere can have a significant impact on winter surface weather on subseasonal to seasonal (S2S) timescales. This study evaluates the ability of current operational S2S prediction systems to capture two important ...

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