Interannual and interdecadal variations of the sea ice in Bohai Sea and its mechanisms

Zheng Dongmei; Wang Zhibin; Zhang Shuying; Xu Peng; Zhou Zhiqiang

doi:10.3969/j.issn.0253-4193.2015.06.002

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Zheng Dongmei, Wang Zhibin, Zhang Shuying, Xu Peng, Zhou Zhiqiang. Interannual and interdecadal variations of the sea ice in Bohai Sea and its mechanisms[J]. Haiyang Xuebao, 2015, 37(6): 12-20. doi: 10.3969/j.issn.0253-4193.2015.06.002

Citation:

Zheng Dongmei, Wang Zhibin, Zhang Shuying, Xu Peng, Zhou Zhiqiang. Interannual and interdecadal variations of the sea ice in Bohai Sea and its mechanisms[J]. Haiyang Xuebao, 2015, 37(6): 12-20. doi: 10.3969/j.issn.0253-4193.2015.06.002

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Interannual and interdecadal variations of the sea ice in Bohai Sea and its mechanisms

doi: 10.3969/j.issn.0253-4193.2015.06.002

Marine Environmental Forecasting and Disaster Preventing and Reducing Center of Liaoning Province, Shenyang 110001, China

Received Date: 2014-07-15

Abstract

Abstract

Based on the sea ice grade data in the Bohai Sea during 1951 to 2013, the interannual and interdecadal variations of sea ice in the Bohai Sea are studied using maximum-entropy spectrum analysis, correlation analysis and composite analysis methods. The effects of the local climate, atmospheric circulation, ENSO (El Niño-Southern Oscillation) and the Pacific Decadal Oscillation (PDO) on the sea ice are also discussed respectively. The results showed that sea ice had distinct interannual and interdecadal variations. Especially it jumped from heavy to light in 1972, and the sea ice grade dropped by 0.7 because of the climate jump. The correlation analysis and composite analysis showed that the interannual variations of sea ice had close relationships with local climate, Western Pacific Subtropical High (WPSH), polar vortex and Eurasian circulation. WPSH in autumn, Eurasian and Asian zonal circulation in winter all had important effects on the interannual variations of sea ice, especially after 1972; these are key factors for Bohai Sea seaice forecasting. But the interdecadal variations of sea ice had close relationships with the PDO, ENSO in spring and Western Pacific Subtropical High in winter.
- Bohai Sea,
- sea ice,
- interannual variations,
- interdecadal variations

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References(16)

References

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