Uniform Asymptotics for the Linear Kelvin Wave in Spherical Geometry
2008 ◽
Vol 65
(2)
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pp. 655-660
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Abstract The Kelvin wave is the gravest eigenmode of Laplace’s tidal equation. It is widely observed in both the ocean and the atmosphere. In the absence of mean currents, the Kelvin wave depends on two parameters: the zonal wavenumber s (always an integer) and Lamb’s parameter ε. An asymptotic approximation valid in the limit s2 + ε ≫ 1 is derived that generalizes the usual “equatorial wave” limit that ε → ∞ for fixed s. Just as shown for Rossby waves two decades ago, the width of the Kelvin wave is (ε + s2)−1/4 rather than ε−1/4 as in the classical equatorial beta-plane approximation.
2018 ◽
Vol 75
(5)
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pp. 1721-1739
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2008 ◽
Vol 65
(12)
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pp. 3736-3757
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2019 ◽
Vol 76
(8)
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pp. 2463-2480
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Keyword(s):
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2007 ◽
Vol 64
(10)
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pp. 3406-3423
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2009 ◽
Vol 66
(8)
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pp. 2429-2443
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1989 ◽
Vol 12
(3)
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pp. 547-557
Keyword(s):