The interannual variation and preliminary analysis of upwelling in eastern Hainan Island in summer of 2014 and 2015

Li Kai; Gao Lu; Dong Xu; Pan Aijun; Wang Weibo; Wan Xiaofang

doi:10.3969/j.issn.0253-4193.2019.01.001

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Li Kai, Gao Lu, Dong Xu, Pan Aijun, Wang Weibo, Wan Xiaofang. The interannual variation and preliminary analysis of upwelling in eastern Hainan Island in summer of 2014 and 2015[J]. Haiyang Xuebao, 2019, 41(1): 1-10. doi: 10.3969/j.issn.0253-4193.2019.01.001

Citation:

Li Kai, Gao Lu, Dong Xu, Pan Aijun, Wang Weibo, Wan Xiaofang. The interannual variation and preliminary analysis of upwelling in eastern Hainan Island in summer of 2014 and 2015[J]. Haiyang Xuebao, 2019, 41(1): 1-10. doi: 10.3969/j.issn.0253-4193.2019.01.001

Citation:

Li Kai, Gao Lu, Dong Xu, Pan Aijun, Wang Weibo, Wan Xiaofang. The interannual variation and preliminary analysis of upwelling in eastern Hainan Island in summer of 2014 and 2015[J]. Haiyang Xuebao, 2019, 41(1): 1-10. doi: 10.3969/j.issn.0253-4193.2019.01.001

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The interannual variation and preliminary analysis of upwelling in eastern Hainan Island in summer of 2014 and 2015

doi: 10.3969/j.issn.0253-4193.2019.01.001

Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China

Received Date: 2017-12-05
Rev Recd Date: 2018-03-14

Abstract

Abstract

On the basis of spot investigation data and satellite remote sensing data in eastern Hainan Island of July 2014 and 2015, we investigated the variation of upwelling in eastern Hainan Island under the influence of ENSO. Results show that 2015 is a strong El Niño year, and the low temperature, high salinity water is deeper from the surface than 2014, but more shallow in the offshore, and the climbing phenomenon of the upwelling is more obvious. The 27.5℃ isothermal of temperature and the 34 isograms of salinity can climb up to 15-25 m in the whole section. Influenced by southwesterly wind, the low temperature-high salinity water climb up along the terrain, which is the typically wind-driven upwelling. 2014 is a normal year, the low temperature-high salinity water is more shallow from the surface than 2015 (except the offshore), the low temperature-high salinity phenomenon is more obvious than 2015 in the same depth, but the climb phenomenon of the upwelling is not obvious. The 27.5℃ isothermal of temperature and the 34 isograms of salinity climb in less than 10 m. Prevailing wind is southeasterly wind, which suppresses the form of upwelling. The low temperature-high salinity water lifting is formed on the whole terrain, which is not suit to the characteristic of the typically wind-driven upwelling. This shows that the form of upwelling in eastern Hainan Island in 2014 may be associated with the thermocline lift caused by circulation changes off the coast.
- ENSO,
- the upwelling in eastern Hainan Island,
- low temperature-high salinity

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References(16)

References

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