TY - JOUR
T1 - The Effect of the Finite Rossby Radius on Two-Dimensional Isotropic
AU - Yanase, Shin Ichiro
N1 - Copyright:
Copyright 2016 Elsevier B.V., All rights reserved.
PY - 1984
Y1 - 1984
N2 - The effect of the finite outer Rossby radius on two-dimensional isotropic turbulence in a single-layered fluid is investigated using the modified cumulant expansion method. This type of turbulence may be considered as a model of geostrophic turbulence in the atmosphere. The beta effect is neglected in order to avoid extra complexity. It is found that turbulent motions with scale larger than the Rossby radius are strongly suppressed and consequently the inverse cascade of the energy is remarkably reduced. At large wavenumbers,the similarity law of the energy spectrum is identical to that of two-dimensional turbulence without rotation. The kinetic energy decreases in time, while the potential energy increases.
AB - The effect of the finite outer Rossby radius on two-dimensional isotropic turbulence in a single-layered fluid is investigated using the modified cumulant expansion method. This type of turbulence may be considered as a model of geostrophic turbulence in the atmosphere. The beta effect is neglected in order to avoid extra complexity. It is found that turbulent motions with scale larger than the Rossby radius are strongly suppressed and consequently the inverse cascade of the energy is remarkably reduced. At large wavenumbers,the similarity law of the energy spectrum is identical to that of two-dimensional turbulence without rotation. The kinetic energy decreases in time, while the potential energy increases.
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U2 - 10.1143/JPSJ.53.2513
DO - 10.1143/JPSJ.53.2513
M3 - Article
AN - SCOPUS:0021477103
VL - 53
SP - 2513
EP - 2520
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 8
ER -