摘要
本文对1987年5月在西沙永兴岛观测的Cl^-核与SO_4^-核资料进行了分析。主要结果是:(1)干直径大于2μ的Cl^-核平均浓度618个/L,平均含盐量57.2μg/m^3,介于普陀与海洋岛的观测值之间,谱型呈准单调下降的幂函数递减谱;最大干直径59μ的SO_4^-核平均浓度15个/L,平均含盐量23.8μg/m^3,谱较Cl^-核谱宽得多。(2)Cl^-核与SO_4^-核浓度均随离海面高度增加而减少。(3)盐核分布与风速,波高有较好的对应关系;Cl^-核在14时出现极大值,其日变化规律与潮位有一定关系。
In this paper, the chlorine and sulfate nucleus data, Observed in Yongxing (Xisha islands) during May, 1987, are analyzed, The main results are:1) The average concentration of chlorine ion nuclei is 618 per litre and the average salt content is 57. 2μg/m3. Both values are between the data observed in Putou and Haiyang island; the spectrum type shows quasiunimodal and exponential lapse rate, The average concentration of sulfate ions is 15 per litre ,the mean salt content is 23. 8 μg/m3,and the spectral show multimodal types, more wider than that of chlorine ions, the largest dried diameter reaches 59μ.2) Both concentrations of sulfate ions and chlorine ions decrease as the distances to seaside increase.3) The distribution of sea-salt nuclei has very good correlations with wind speed and wave height. Chlorine ion nuclei appear largest value at 14 o' clock, Their diurnal variations are relative to tide.
出处
《热带气象》
CSCD
1990年第4期357-364,共8页
基金
国家气象科学基金资助
