An automatic recognition algorithm of global mesoscale dipole based on eddy tracking data

Tian Fenglin; Yuan Zhonghao; Liu Wei; Cheng Lingqi; Chen Ge

doi:10.12284/hyxb2021015

Volume 43 Issue 1

Feb. 2021

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Tian Fenglin，Yuan Zhonghao，Liu Wei, et al. An automatic recognition algorithm of global mesoscale dipole based on eddy tracking data[J]. Haiyang Xuebao，2021, 43(1)：122–136 doi: 10.12284/hyxb2021015

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An automatic recognition algorithm of global mesoscale dipole based on eddy tracking data

doi: 10.12284/hyxb2021015

Tian Fenglin^{1, 2, 3
,},
Yuan Zhonghao¹,
Liu Wei⁴,
Cheng Lingqi¹,
Chen Ge^{1, 2
,
,}

1.
School of Information Science and Engineering, Ocean University of China, Qingdao 266100, China
2.
Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China
3.
Key Laboratory of Urban Land Resources Monitoring and Simulation, Ministry of Natural Resources, Shenzhen 518034, China
4.
Qingdao Institute of Measurement Technology, Qingdao 266100, China

Received Date: 2020-03-16
Rev Recd Date: 2020-05-12

Available Online: 2021-02-24

Publish Date: 2021-01-25

Abstract

Abstract

It is a common ocean phenomenon that eddies attract each other and propagate in the form of dipole mode, and these dipoles play an important role in transporting seawater, nutrients and other substances. In this paper, a global dipole pair automatic recognition method based on the eddy trajectory data is proposed. By using the K–D tree for cutting space, the eddy trajectory data are calculated from January 1993 to September 2016, and a total of 86 662 westward moving dipoles and 30 590 eastward moving dipoles with a life cycle of more than 60 days are found. The global characteristics of the dipole that we detected are analyzed, and the reliability of the automatic recognition algorithm is verified by the comparison and test with sea surface temperature anomaly and sea surface salinity anomaly. Finally in this paper, the transmission modes and characteristics of dipoles are analyzed, including the characteristics of long life, high propagation speed and entanglement trajectory.
- dipole,
- K–D tree,
- eddy tracking,
- eddy recognition

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References(40)

References

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