Automatic Identification Method of Ocean Mesoscale Vortex Dipoles
An automatic identification and dipole technology, applied in the field of ocean eddy identification, can solve the problems of limiting the speed of mesoscale eddy research and low visual identification efficiency, and achieve the effect of improving identification efficiency
Active Publication Date: 2022-05-17
OCEAN UNIV OF CHINA +1
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Problems solved by technology
However, the current identification of dipoles is mainly based on vision, and the number of eddies existing in the ocean every day is huge, and the efficiency of visual identification is very low
There is still no very effective method to quickly and accurately find such mesoscale vortex dipoles in the ocean, which greatly limits the speed of research on mesoscale eddies
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[0012] In the identification data of the present invention, potential dipoles are screened out according to the distance between the cold and warm vortices, and then the candidate cold and warm vortices kept within a certain distance for a long time are screened out as dipoles by using the tracking data. Include the following steps:
[0013] 1. Screening vortex identification and tracking data
[0014] Separate the cold vortex from the warm vortex in the identification data, find out the vortex whose lifetime L is less than N weeks in the eddy tracking data, and remove it from the tracking data and identification data. N can be set manually. The value of N affects the number of dipoles finally identified. To identify as many dipoles as possible, relax the filter conditions, that is, reduce the value of N. The initial value of N is set to 16. Only vortices with lifetime L>N are retained in the identified and tracked data after screening;
[0015] 2. Establish a K-D tree fo...
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The invention belongs to the field of ocean eddy identification, and in particular relates to an automatic identification method for ocean mesoscale vortex dipoles. According to the vortex identification and tracking data, the method builds a K-D tree for the warm vortex, finds the warm vortex near each cold vortex in the data at a certain moment, establishes the connection between the cold vortex and these warm vortexes, and tracks the data. to further determine their relationship. Delete vortex tracking and identification data that could not be dipoles. All the data are processed to finally obtain the tracking and identification data of dipoles. Compared with naked eye identification, this method greatly improves the identification efficiency of ocean mesoscale vortex dipoles, fully utilizes the computing power of computers, digs out the secrets hidden in the ocean, and provides convenience for the study of mesoscale eddies.
Description
technical field [0001] The invention belongs to the field of ocean eddy identification, and in particular relates to an automatic identification method for ocean mesoscale vortex dipoles. Background technique [0002] Mesoscale eddies, as a common phenomenon in the ocean, can carry water bodies to migrate for a long distance before dissipating, with a spatial scale of tens of kilometers to hundreds of kilometers and a time scale of days to years. Since the implementation of large-scale international survey programs in the 1970s and 1980s, scientists have used anchored buoys and drift profilers to investigate marine mesoscale eddies, and established early observation data and theoretical systems for eddy research. In the late 1980s, the appearance of satellite altimeter products provided strong evidence for the study of mesoscale vortices, and constantly updated people's understanding of mesoscale vortices. With the accumulation of altimeter data over the years, long-term an...
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IPC IPC(8): G06F30/20
CPCG06F30/20
Inventor 田丰林程领骑何遒陈戈
Owner OCEAN UNIV OF CHINA