Fast extraction algorithm of intersection data of ocean eddies and argo buoys based on cuda

Abstract

The invention provides an ocean eddy and Argo buoy intersection data rapid extraction algorithm based on a CUDA. CPU / GPU heterogeneity is utilized, the data format is optimized, the data transmission amount is reduced, and the copy time between the CPU and the GPU is shortened; combined with the data characteristic of ocean eddies that different eddies generally do not influence each other, each eddy is used as a unit and is expressed by a thread block, the data of one eddy in one day is further expressed by a thread, and thread distribution is optimized; point set data of Argo buoys are traversed in a core function, Julian days of eddy data and Argo buoy data are matched, and then a plane bounding box algorithm and a PNPoly algorithms are utilized to calculate Argo buoy data in an eddy boundary range; and in a data storage process, the organization type of eddy data is optimized, and all information is integrated in one data set. The thread distribution mode is high in logic, the algorithm is optimized in the calculation process of the core function, and the generation efficiency of the data set is greatly improved.

Description

technical field [0001] The invention relates to ocean eddy data structure analysis and vortex buoy intersection data extraction technology. Specifically, it implements the GPU parallel computing architecture CUDA to accelerate the algorithm for extracting ocean eddy and Argo buoy intersection data sets. Background technique [0002] At present, the data for analyzing mesoscale eddies mainly come from remote sensing inversion data. According to remote sensing data, people define mesoscale vortices as mesoscale vortices (also known as synoptic ocean vortices), which refer to vortices with a diameter of about 100-300 kilometers in the ocean. It is usually divided into two types: cyclonic vortex (rotating counterclockwise in the northern hemisphere), anticyclonic vortex (rotating clockwise in the northern hemisphere). Mesoscale eddies play a very important role in ocean dynamics, salt, energy transport, and other biological and chemical processes, which in turn affect the ocean...

AI Technical Summary

Problems solved by technology

Every data adjustment takes a lot of time

In order to comprehensively analyze the distribution, motion trajectory and internal structural characteristics of mesoscale vortices, the global scope is undoubtedly the most ideal scope, but the total data magnitude of vortices and Argo buoys reaches hundreds of billions, and the CPU can no longer meet our needs

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