Now showing items 1-9 of 9

    • Atmospheric transport and critical layer mixing in the troposphere and stratosphere 

      Smy, Louise Ann (University of St Andrews, 2012-06-22) - Thesis
      This thesis aims to improve the understanding of transport and critical layer mixing in the troposphere and stratosphere. A dynamical approach is taken based on potential vorticity which has long been recognised as the ...
    • A new class of vacillations of the stratospheric polar vortex 

      Scott, Richard Kirkness (2016-07) - Journal article
      A new class of persistent vacillations of the winter polar vortex, under the action of topographic wave forcing and radiative cooling, is identified in numerical integrations of the rotating shallow water equations. The ...
    • Number of degrees of freedom and energy spectrum of surface quasi-geostrophic turbulence 

      Tran, Chuong Van; Blackbourn, Luke Austen Kazimierz; Scott, Richard Kirkness (2011-10) - Journal article
      We study both theoretically and numerically surface quasi-geostrophic turbulence regularized by the usual molecular viscosity, with an emphasis on a number of classical predictions. It is found that the system's number of ...
    • Quasi-geostrophic vortices in compressible atmospheres 

      Scott, Richard Kirkness; Dritschel, David Gerard (2005-05-10) - Journal article
      This paper considers the effect of an exponential variation in the background density field (as exists in compressible atmospheres) on the structure and dynamics of the quasi-geostrophic system, and compares the results ...
    • Revisiting Batchelor's theory of two-dimensional turbulence 

      Dritschel, David Gerard; Tran, Chuong Van; Scott, Richard Kirkness (2007-11-25) - Journal article
      Recent mathematical results have shown that a central assumption in the theory of two-dimensional turbulence proposed by Batchelor (Phys. Fluids, vol. 12, 1969, p. 233) is false. That theory, which predicts a X-2/3 k(-1) ...
    • Robustness of vortex populations in the two-dimensional inverse energy cascade 

      Burgess, Belle Helen; Scott, Richard Kirkness (2018-09-10) - Journal article
      We study how the properties of forcing and dissipation affect the scaling behaviour of the vortex population in the two-dimensional turbulent inverse energy cascade. When the flow is forced at scales intermediate between ...
    • The stability of Mars' annular polar vortex 

      Seviour, William; Waugh, Darryn; Scott, Richard Kirkness (2017-05) - Journal article
      The Martian polar atmosphere is known to have a persistent local minimum in potential vorticity (PV) near the winter pole, with a region of high PV encircling it. This finding is surprising since an isolated band of PV is ...
    • The structure of zonal jets in geostrophic turbulence 

      Scott, Richard Kirkness; Dritschel, David Gerard (2012-11) - Journal article
      The structure of zonal jets arising in forced-dissipative, two-dimensional turbulent flow on the β-plane is investigated using high-resolution, long-time numerical integrations, with particular emphasis on the late-time ...
    • Vortical control of forced two-dimensional turbulence 

      Fontane, Jerome Jacob Louis; Dritschel, David Gerard; Scott, Richard Kirkness (2013-01-14) - Journal article
      A new numerical technique for the simulation of forced two-dimensional turbulence[D. Dritschel and J. Fontane, “The combined Lagrangian advection method,” J. Comput. Phys.229, 5408–5417 (Year: 2010)10.1016/j.jcp.2010.03.048] ...