Three-dimensional mesoscale eddy identification and tracking algorithm based on pressure anomalies

Liming YUAN; Fenglin TIAN; Suqin XU; Chun ZHOU; Jie CHEN

doi:10.1007/s00343-021-0309-5

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Three-dimensional mesoscale eddy identification and tracking algorithm based on pressure anomalies

Physics | Updated：2023-05-20

- Three-dimensional mesoscale eddy identification and tracking algorithm based on pressure anomalies
- Journal of Oceanology and Limnology Vol. 39, Issue 6, Pages: 2153-2166(2021)
- Affiliations：
  
  1.CSSC Ocean Exploration Technology Institute Co., Ltd., Wuxi 214000, China
  2.College of Information Science and Engineering, Ocean University of China, Qingdao 266100, China
  3.PLA Naval Submarine Academy, Qingdao 266199, China
- Author bio：
  
  Suqin XU, E-mail: xsqymq@sohu.com
- Funds：
- DOI：10.1007/s00343-021-0309-5
  CLC：
- Received：11 August 2020，
  
  Accepted：11 October 2020，
  
  Online First：24 December 2020，
  
  Published：2021-11
- Accepted：
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Liming YUAN, Fenglin TIAN, Suqin XU, et al. Three-dimensional mesoscale eddy identification and tracking algorithm based on pressure anomalies[J]. Journal of Oceanology and Limnology, 2021, 39(6): 2153-2166.
DOI：

Liming YUAN, Fenglin TIAN, Suqin XU, et al. Three-dimensional mesoscale eddy identification and tracking algorithm based on pressure anomalies[J]. Journal of Oceanology and Limnology, 2021, 39(6): 2153-2166. DOI： 10.1007/s00343-021-0309-5.

摘要

Abstract

The Kuroshio Extension (KE) is one of the most eddy-energetic regions in the global ocean. However

most mesoscale eddy studies in the region are focused on surface eddies and the structure and characteristics of three-dimensional (3-D) eddies require additional research. In this study

we proposed a 3-D eddy identification and tracking algorithm based on pressure anomalies

similar to sea level anomalies (SLAs) for surface eddy identification. We applied this scheme to a 5-year (2008–2012) high-resolution numerical product to develop a 3-D eddy dataset in the KE. The reliability of the numerical product was verified by the 5-year temperature/salinity hydrological characteristics and surface eddy distribution. According to the 3-D eddy tracking dataset

the number of eddies decreased dramatically as the eddy existence-time increased and more anticyclonic eddies (AEs) had an existence-time longer than 1 week than cyclonic eddies (CEs). We presented daily variations in the 3-D structure of two 3-D eddy-tracking trajectories that exhibit a certain jump in depth and a shift toward the west and equator. In addition to the bowl

lens

and cone eddies that have been discovered by previous researchers

we found that there is a cylindrical eddy

and its eddy radii are almost consistent across all layers. CEs cause significant negative temperature anomalies

"negative-positive" salinity anomalies

and sinking current fields in the KE region

while AEs cause positive temperature anomalies

"positive-negative" salinity anomalies

and upward current fields. The four types of eddies have different effects on the temperature/salinity anomalies and current field distribution which are related to their structure.

关键词

Keywords

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Related Institution

Zhanjiang Bay Laboratory of Guangdong Province

Southern Marine Science and Engineering Guangdong Laboratory

Department of Marine Technology, Guangdong Ocean University

State Key Laboratory of Submarine Geosciences, Second Institute of Oceanography, Ministry of Natural Resources

Laboratory for Marine Geology, Qingdao Marine Science and Technology Center

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