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本文采用本所“实验3”号1985—1987年冬季在西太平洋热带海域考察的CTD资料,分析了1986—1987年E1 Ni(?)o事件前后西太平洋热带海域上层热力结构的时、空分布及演变特征。结果表明,该事件发生前的冬季,沿13°N,在124.5°—137°E存在海洋Rcssby波扰动,海洋上层热含量很丰富。该事件初期,沿5°N,在127°—135°E一带,有海洋赤道Kelvin波动。此时南、北赤道流均较弱。事件后期,海洋赤道Kelvin波扰动不明显,但南赤道流较强,且范围向北伸展。1986年10—12月,表征E1 Ni(?)o事件的上层热力结构首先在西太平洋海域出现,然后东传。1987年10—11月,表征非E1 Ni■o事件的上层热力结构率先在西太平洋热带海域西边界恢复。
Based on the CTD data of the “Experiment 3” from 1985 to 1987 in the western tropical Pacific Ocean in winter, this paper analyzes the temporal and spatial distribution of the upper thermodynamic structure in the western tropical Pacific before and after E1 Ni (?) O in 1986-1987 And evolutionary characteristics. The results show that there is a Rcssby wave perturbation along the 13 ° N and 124.5 ° -137 ° E in the winter before the event, and the heat content in the upper ocean is very rich. At the beginning of this event, there was an equatorial Kelvin wave along 5 ° N and 127 ° -135 ° E. At this moment, the south and north equatorial flows are weaker. Late in the event, the equatorial Kelvin waves perturbed slightly, but the southern equatorial current was stronger and the range extended northward. From October to December 1986, the upper thermodynamic structure characterizing the E1 Ni (?) O event first appeared in the western Pacific Ocean and then eastward. From October to November 1987, the upper thermodynamic structure characterizing the non-El Niño event was first restored in the western boundary of tropical western Pacific Ocean.