摘要
本文通过对南沙群岛永暑礁海洋气象观测站1989年夏季(5—8月)的海气要素功率谱和交叉谱分析,得出气象要素变化普遍存在30—40天和15.38天两种低频波;对于这两种低频波,海平面气压与海面风速两要素有显著的相关,风速的变化落后于气压0.34天(30—40天振荡)和0.68天(准双周振荡);低云量与风速也有显著的相关,30—40天振荡风速落后于低云量0.86天,准双周振荡风速超前于云量0.37天。表层水温也具有准双周振荡规律,与低云量有显著相关,且落后低云量0.47天。
In this paper,the power spectrum and cross spectrum are calculated for the Yongshu reef,amarine meteorological observatory,of the Nansha archipelago,with the ocean-atmosphere ele-ments during the summer(from May to August)of 1989.The results show that:(1)in the varia-tion of meteorological elements,there are two low—frequency waves with 30—40 day and 15.38 day periods,respectively;(2)as to the two low—frequency waves,there is an obvious lag cor-relation between pressure and wind,also there is clear correlation between low—cloud and windvelocity;(3)the water skin—surface temperature is characterized by quasi—two week oscillationand is correlated to low—cloud evidently.Finally,a discussion is made on the mechanism of syn-optic dynamics and the ocean—atmosphere interaction of these correlations.
出处
《应用气象学报》
CSCD
北大核心
1992年第1期125-128,共4页
Journal of Applied Meteorological Science
