Response of equatorial Pacific upper ocean current to westerly wind bursts

Wang Fan; Wu De-xing; She Guo-hui; Yan Ji-qiao

doi:10.1007/BF02889462

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Response of equatorial Pacific upper ocean current to westerly wind bursts

Updated：2023-05-16

- Response of equatorial Pacific upper ocean current to westerly wind bursts
- Journal of Oceanology and Limnology Vol. 13, Issue 4, Pages: 294-302(1995)
- Affiliations：
  
  Institute of Physical Oceanography Ocean University of Qingdao
- Author bio：
- Funds：
- DOI：10.1007/BF02889462
  CLC：
- Published：1995
- Accepted：
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Fan, W., De-xing, W., Guo-hui, S. et al. Response of equatorial Pacific upper ocean current to westerly wind bursts., Chin. J. Ocean. Limnol. 13, 294–302 (1995). https://doi.org/10.1007/BF02889462
DOI：

Fan, W., De-xing, W., Guo-hui, S. et al. Response of equatorial Pacific upper ocean current to westerly wind bursts., Chin. J. Ocean. Limnol. 13, 294–302 (1995). https://doi.org/10.1007/BF02889462 DOI：

摘要

Abstract

The characteristics of the response of equatorial Pacific upper ocean current to westerly wind bursts (WWB) were analyzed in the frequency domain by using wind and ADCP data collected bythe Shiyan 3 during TOGA-COARE IOP

1992–1993. The preliminary results showed that the response consisted of an eastward surface jet at shallower than 60m depth

a westward counter current centering near 100m and a shear layer between them

with the variations of all three being nonlinear and nearly synchronous. The oceanic responses in the frequency domain were characterized by occurrences of a remotely forced mixed Rossby-gravity wave with period of 8–10 days in the surface jet and countercurrent at shallower than 110m depth

and two locally forced waves with periods of 24 days and 4–5 days limited in shallower than 70m depth. These fluctuations of the responses depended much more on zonal wind than meridional wind. The results also revealed that the oceanic response to WWB resulted from momentum transport and energy propagation associated with wave

baroclinic mode

nonlinear shear instability

and possibly other factors.

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references

Chiswell, S. M. and Lukas, R., 1989. Rossby-gravity waves in the central equatorial Pacific Ocean during NORPAX.J. Geophys. Res. 94(C2): 2091–2098.

Eriksen, C. C., 1993. Equatorial ocean response to rapidly translating wind bursts.J. Phys. Oceanogr. 23: 1208–1230.

Garwood, R. W., Chu, P. C., Muller, R. P. et al., 1989. Equatorial entrainment zone: the diurnal cycle.In: Proceedings of the Western Pacific International and Workshop on TOGA-COARE. May 24–30, in Noumea, New Caledonia pp. 435–444.

Godin, G., 1967. The analysis of current observations. Int. Hydrogr. Rev. XLIV, No.1, 149–165.

McPhaden, M., Freitag, P., Hayes, S. et al., 1988. The response of the equatorial Pacific Ocean to a westerly wind burst in May 1986.J. Geophys. Res. 93: 10589–10603.

McPhaden, M. T., Bahr, F., Du Penhoat, Y., et al., 1992. The response of the western equatorial Pacific Ocean to westerly wind bursts during Nov. 1989 to Jan. 1990.J. Geophys. Res. 97(c9): 14289–14303.

Wu, D., Sun, J., Wang, F., Wang, Z., 1993. Preliminary analysis of partial data collected by theShiyan 3 during TOGA-COARE IOP.J. Ocean University of Qingdao.23(Suppl.): 17–32.

Wunsch, C., Gill, A. E., 1976. Observations of equatorially trapped waves in Pacific Sea level variation.Deep Sea Res. 23: 371–390.

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