Large‐scale Rossby wave in the mid‐latitude South Pacific from altimetry data | Zendy

Wang L. | Zendy; Koblinsky C. | Zendy; Howden S. | Zendy; Beckley B. | Zendy

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Large‐scale Rossby wave in the mid‐latitude South Pacific from altimetry data

Author(s) -

Wang L.,

Koblinsky C.,

Howden S.,

Beckley B.

Publication year - 1998

Publication title -

geophysical research letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.007

H-Index - 273

eISSN - 1944-8007

pISSN - 0094-8276

DOI - 10.1029/97gl03567

Subject(s) - rossby wave , altimeter , rossby radius of deformation , amplitude , wavelength , latitude , geology , climatology , scale (ratio) , geodesy , physics , optics , quantum mechanics

We present observations of large‐scale Rossby wave propagation in the mid‐latitude South Pacific (25°S) from analyzing 4 years of TOPEX/POSEIDON altimetry data. Using wavelet transform we separate phase propagation from amplitude modulation. The dominant Rossby wave has a wavelength of about 40° with a period close to 2 years (phase speed ∼6.4 cm/s). Its amplitude modulates both interannually and intraannually. In addition, we also found a shorter‐scale Rossby wave with a wavelength of about 16° and a period close to 9 months.

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