Interannual variability of Arctic multi-year ice transport and its interruption in the Beaufort Gyre zone

Huang Ding; Su Jie

doi:10.12284/hyxb2024099

Volume 46 Issue 10

Oct. 2024

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Huang Ding，Su Jie. Interannual variability of Arctic multi-year ice transport and its interruption in the Beaufort Gyre zone[J]. Haiyang Xuebao，2024, 46(10)：50–64 doi: 10.12284/hyxb2024099

Citation:

Huang Ding，Su Jie. Interannual variability of Arctic multi-year ice transport and its interruption in the Beaufort Gyre zone[J]. Haiyang Xuebao，2024, 46(10)：50–64 doi: 10.12284/hyxb2024099

Citation:

Huang Ding，Su Jie. Interannual variability of Arctic multi-year ice transport and its interruption in the Beaufort Gyre zone[J]. Haiyang Xuebao，2024, 46(10)：50–64 doi: 10.12284/hyxb2024099

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Interannual variability of Arctic multi-year ice transport and its interruption in the Beaufort Gyre zone

doi: 10.12284/hyxb2024099

Huang Ding^1
,,
Su Jie^{1, 2, 3
,
,}

1.
College of Oceanography and Atmosphere, Ocean University of China, Qingdao 266100, China
2.
Key Laboratory of Physical Oceanography, Ministry of Education, Ocean University of China, Qingdao 266100, China
3.
Joint Center for Polar Research of Chinese Universities, Beijing 100875, China

Received Date: 2024-06-08
Rev Recd Date: 2024-08-13
Publish Date: 2024-10-30

Abstract

Abstract

Due to global warming, a significant amount of multi-year ice(MYI) has been replaced by seasonal ice in recent years. In this study, the multi-year ice flux of representative sections(Northern Beaufort (NB) section, W150° Section, Eastern Chukchi (EC) Section and Central Arctic (CA) Section) of the Arctic Ocean is calculated based on ice age, ice concentration and ice velocity data. The main factors affecting ice fluxes at each section from 1984 to 2021 were investigated in the context of atmospheric reanalysis data. The occurrence time and reasons for theMYI transport interruptions were analyzed. The results show that the weakening of the Beaufort High (BH) corresponds to a reduction in MYI transport in the NB section and an increase in the CA Section along Transpolar Drift region. During the negative phase of the Arctic Dipole (DA), the anticyclonic wind field weak, which reduced the south winds in East Siberia, leading to a decrease in the MYI flux in the EC Section. The decrease in meridional wind has reduced the flux in the CA Section. However, after 2004, the correlation between sea ice flux in the Beaufort gyre region and the Transpolar drift region sections with the DA index decreased. This is mainly due to the continuous contraction of the MYI extent, which has resulted in a decreasing trend in section and even interruptions. The contraction also changes the periodicity of the MYI flux. At the same time, interannual variations of ice velocity can also cause interruptions of multi-year ice transport in the Beaufort gyre. The results indicate that interruptions usually occur during the negative phase periods of the BH index and DA index. However, it is noteworthy that not all months with BH and DA index below the negative standard deviation correspond to the time oftransport interruption. When an interruption occurs, the wind field anomaly center is closer to the North Pole than in the normal of the negative phase of the BH. Furthermore, the spatial distribution of positive and negative sea level pressure anomalies is more symmetrical, compared to the normal negative phase of the DA.
- multi-year ice transport,
- interruption,
- Beaufort High,
- Arctic dipole

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References(42)

References

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