Evidence against a general positive eddy feedback in atmospheric blocking

  title={Evidence against a general positive eddy feedback in atmospheric blocking},
  author={Lei Wang and Zhiming Kuang},
  • Lei Wang, Zhiming Kuang
  • Published 2019
  • Physics
  • The eddy straining mechanism of Shutts (1983; S83) has long been considered a main process for explaining the maintenance of atmospheric blocking. As hypothesized in S83, incoming synoptic eddies experience a meridional straining effect when approaching a split jetstream, and as a result, enhanced PV fluxes reinforce the block. A two-layer QG model is adopted here as a minimal model to conduct mechanism-denial experiments. While transient eddies' forcing is clearly critical to the formation and… CONTINUE READING

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