Study on marine environment of the tuna purse seine fishery in Western and Central Pacific based on EOF analysis

doi:10.3969/j.issn.1001-909X.2019.02.009

Abstract

Abstract: According to the numerical forecast data of ECMWF in the past 10 years, we analyzed the spatial distribution of sea surface temperature, sea surface wind field and effective wave height of the four seasons and the whole year of the tuna purse seine fishery in the Western and Central Pacific Ocean, and studied the spatial and temporal variation characteristics using Empirical Orthogonal Function (EOF) and Empirical Mode Decomposition (EMD). Research shows that the spatial and temporal distributions of sea surface temperature, sea surface wind field, effective wave height have significant changes; the first, second, third modal variance contribution rates of sea surface temperature are 62.59%, 10.98%, 6.7%, and have 0.5 year, 1 year, 3 year cycle changes; the first, second, third modal variance contribution rates of sea surface wind field are 40.29%, 18.39%, 9.36%, and have 0.2-0.25 year, 0.5 year, 1 year cycle changes; the first, second, third modal variance contribution rates of effective wave height are 44.17%,17.35%, 10.96%, and have 0.2-0.3 year, 0.5-1 year, 1 year cycle changes.

Key words: sea surface temperature, sea surface wind field, effective wave height, EOF analysis, EMD analysis

CLC Number:

ZHANG Xiao-long, FU Dong-yang, LIU Da-zhao, LIU Bei, YU Guo, ZHONG Ya-feng, WANG Huan. Study on marine environment of the tuna purse seine fishery in Western and Central Pacific based on EOF analysis[J]. Journal of Marine Sciences, 2019, 37(2): 81-94.

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