Editorial Type:
Article
Article Type:
Research Article

Asymmetrization Mechanism of Jet Profiles in Decaying β-Plane Turbulence

Keiichi Ishioka Division of Earth and Planetary Sciences, Graduate School of Science, Kyoto University, Kyoto, Japan

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Jitsuko Hasegawa Japan Meteorological Agency, Tokyo, Japan

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Shigeo Yoden Division of Earth and Planetary Sciences, Graduate School of Science, Kyoto University, Kyoto, Japan

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Print Publication:
01 Sep 2007
Collections:
Jets and Annular Structures in Geophysical Fluids (Jets)
DOI:
https://doi.org/10.1175/JAS4011.1
Page(s):
3354–3361
Restricted access

Abstract

In a previous paper, asymmetry was found in jet profiles between eastward and westward jets, which appear spontaneously in two-dimensional β-plane decaying turbulence. That is, westward jets are narrower and more intense than eastward jets. In this paper, the dependence of the asymmetry on the order of hyperviscosity is examined. It is shown that the dependence is not as strong as expected in the previous paper. A revised theoretical scenario to explain the weak dependence is also given.

Corresponding author address: Keiichi Ishioka, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto, 606-8502 Japan. Email: ishioka@gfd-dennou.org

This article included in the Jets and Annular Structures in Geophysical Fluids (Jets) special collection.

Abstract

In a previous paper, asymmetry was found in jet profiles between eastward and westward jets, which appear spontaneously in two-dimensional β-plane decaying turbulence. That is, westward jets are narrower and more intense than eastward jets. In this paper, the dependence of the asymmetry on the order of hyperviscosity is examined. It is shown that the dependence is not as strong as expected in the previous paper. A revised theoretical scenario to explain the weak dependence is also given.

Corresponding author address: Keiichi Ishioka, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto, 606-8502 Japan. Email: ishioka@gfd-dennou.org

This article included in the Jets and Annular Structures in Geophysical Fluids (Jets) special collection.

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