Dynamic and thermohaline properties of the Mindanao Undercurrent I. Dynamic structure

Wang Fan; Hu Dun-xin

doi:10.1007/BF02845177

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Dynamic and thermohaline properties of the Mindanao Undercurrent I. Dynamic structure

OriginalPaper | Updated：2023-05-16

- Dynamic and thermohaline properties of the Mindanao Undercurrent I. Dynamic structure
- Dynamic and thermohaline properties of the Mindanao Undercurrent I. Dynamic structure
- 海洋湖沼学报（英文） 1998年16卷第2期页码：122-127
- Affiliations：
  
  Institute of Oceanology
- Author bio：
- Funds：
  
  Contribution No. 3255 from the Institute of Oceanology, Chinese Academy of Sciences.;Projects 49176255 and 49706066 supported by NSFC, and also by Foundation of Postdoctoral Research.
- DOI：10.1007/BF02845177
  中图分类号：
- 纸质出版：1998
- Accepted：
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Dynamic and thermohaline properties of the Mindanao Undercurrent I. Dynamic structure[J]. 海洋湖沼学报（英文）, 1998,16(2):122-127.

Fan, W., Dun-xin, H. Dynamic and thermohaline properties of the Mindanao Undercurrent I. Dynamic structure., Chin. J. Ocean. Limnol. 16, 122–127 (1998). https://doi.org/10.1007/BF02845177
Dynamic and thermohaline properties of the Mindanao Undercurrent I. Dynamic structure[J]. 海洋湖沼学报（英文）, 1998,16(2):122-127. DOI： 10.1007/BF02845177.

Fan, W., Dun-xin, H. Dynamic and thermohaline properties of the Mindanao Undercurrent I. Dynamic structure., Chin. J. Ocean. Limnol. 16, 122–127 (1998). https://doi.org/10.1007/BF02845177 DOI：

摘要

Abstract

Hydrographic data from eleven 1986–1991 cruises at zonal sections near 8°N from the Philippine coast to 130°E were used to examine the dynamic structure of the western boundary currents there in the present study focusing on the Mindanao Undercurrent (MUC). The MUC with maximum velocity >10 cm/s was found to be a feature of both the individual cruises and multiyear mean velocity field as a countercurrent below the Mindanao Current (MC). Usually

the MUC occupies depths below 200 dbar and consists of more than one core. Its vertical and horizontal scales are 500–1000 m and 100–250 km

respectively

and vary greatly and irregularly. The spatial distribution of the MUC agreed with that of the westward deepening isopycnals in and below the thermocline. In the individual cruises

the volume transports of the MUC relative to 1500 dbar varied from 6.2 to 28.4×106 m3/s (average of 14.4 ×106 m3/s) while those relative to 3000 dbar varied from 15.4 to 43.9×106 m3/s (average of 25.4×106 m3/s). The multiyear mean MUC transport was 5.9×106 m3/s relative to 1500 dbar and 8.7×106 m3/s relative to 3000 dbar. The difference between the multiyear mean MUC transport and that of individual cruises resulted from the MUC spatial variation.

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references

Hu Dunxin, Cui Maochang, 1989. The western boundary current in the far-western Pacific Ocean,In: Proceedings of the Western Pacific International Meeting and Workshop on TOGA-COARE, ORSTOM, Noumea, New Caledonia, 24–30 May, Ed. J. Picaut, R. Lukas and T. Delcroix, p. 123–134.

Hu Dunxin, Cui Maochang, 1991. The western boundary current of the Pacific and its role in the climate.Chin. J. Oceanol. Limnol. 9: 1–14.

Hu Dunxin, Cui Maochang, Qu Tangdong et al., 1991. A subsurface northward current off Mindanao identified by dynamic calculation. Oceanogr. of Asian Marginal Seas., Elsevier Oceanogr. Series 54, 359–365.

Lindstrom, F., Lukas, R., Fine, R. et al., 1987. The Western Equatorial Pacific Ocean circulation study.Nature,330: 533–537.

Lukas, R., Firing, E., Hacker, P. et al., 1991. Observations of the Mindanao Current during the Western Equatorial Pacific Ocean Circulation Study.J. Geophys. Res. 96: 7089–7104.

Toole, J. M., Zou, E., Millard, R. C., 1988: On the circulation of the upper water in the western equatorial Pacific OceanDeep—Sea Res. 35A: 1451–1482.

Toole, J. M., Millard, R. C., Wang Z. et al., 1990: Observations of the Pacific North Equatorial Current bifurcation at the Philippine coast.J. Phys. Oceanogr. 20: 307–318.

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