摘要
分析了在西沙永兴岛观测的Cl-海盐核资料。主要结果有:(1)东北季风期干直径大于2um的Cl-核平均浓度878个/L,平均含盐量105.4ug/m3,其中干直径大于4um的特大核平均为190个/L,最大曾观测到干直径57um的Cl-粒子,均较该地在1987年5月西南季风盛行期的观测值高。谱型呈准单调下降的幂函数递减谱。(2)随距海面高度增加海盐粒子浓度与含盐量均有所减小。(3)Cl-粒子浓度在08时出现极大值,02时出现极小值。日变化规律除与稳定度有关外,与潮位变化亦有一定关系。
In this poper, the chlorine ions nuclei data, observed in Yonxing (xisha islands) during November, 1987, are analyzed. The main results are: 1) The average concentration of chlorine ions nuclei with dry diameters larger than 2um is 878 per litre and the average salt content is 105. 4ug/m3, in which the special giant nuclei with dry diameters larger than 4um have 190 per litre. The largest dry diameter of chlorine ions observed reaches 57um, which are larger than that observed there during the South west summer monsoon. The spetrum type shows quasiudriodal and exponential lapse. 2) The Salt content decreases with the height over sea surface. 3) The concentrations of chlorine ions nuclei reach the maximum value at 08 o'clock, and minimum at 02o'clock.
出处
《热带气象学报》
CSCD
1996年第2期122-129,共8页
Journal of Tropical Meteorology
基金
国家气象局科学基金
关键词
西沙群岛
大气
海盐粒子
分布特征
Giant sea-salt nucleus Salt content Spectrum distribution