白浪法在南海飞沫气溶胶通量计算中的应用和修正  

Application and Modification of Whitecap Method in Sea Spray Aerosol Flux Calculation over the South China Sea

作　　者：褚颖佳 盛立芳[1,2] 刘骞[1] 赵栋梁[1,2] 贾楠[1] 孔亚文 

机构地区：[1]中国海洋大学海洋与大气学院,山东青岛266100 [2]中国海洋大学物理海洋实验室,山东青岛266100

出　　处：《中国海洋大学学报（自然科学版）》2016年第3期15-21,共7页Periodical of Ocean University of China

基　　金：国家自然科学基金项目(41276009)资助~~

摘　　要：白浪覆盖率法（白浪法）是被广泛应用的计算气溶胶粒子通量的方法,但是公式本身还存在一些问题,且其在低纬度海域的应用情况还未见报道。本文利用2012年8月25日—10月12日在中国南海走航实验观测的气溶胶粒子浓度数据,对Monahan等的白浪覆盖率-风速的公式进行了修正,并利用最小二乘法推导出单位白浪面积上次微米气溶胶产生通量与风速的关系。对半径小于0.3μm的粒子,通量的分布符合对数正态分布,通量的对数与风速呈幂函数关系。与高纬度海域的研究相比,中国南海飞沫气溶胶粒子的排放通量特征表现为较小粒子（r80〈0.2μm）较其他海域偏高,而较大粒子略偏低。当风速在7~13m·s-1时,用新的源函数计算的通量与观测值保持较高的一致性。Whitecap method is widely used to calculate the flux of aerosol particles,but there are still some problems with the formula,and the application of the whitecap method in low latitude area has never been reported.The number concentrations in the radius range of 0.06~5μm of sea spray aerosol particles and meteorological parameters were measured on board during a cruise in the South China Sea from August25 to October 12,2012.The whitecap friction formula proposed by Monahan et al.（1980）was modified and the relationship between production flux in per unit area of whitecap and wind speed was calculated by least square method.In the radius range of r80〈0.3μm,the flux spectrum follows lognormal distribution,and logarithm of flux is a power law function of wind speed.In r80〈0.2μm size range,production flux was higher than the flux in the high latitude area,while in r80〉0.2μm size range,was lower than the flux in high latitude area.When the wind speed was in 7~13m·s-1,the flux calculated by the new source function maintains high agreement with the observed value.

关 键 词：飞沫气溶胶 白浪覆盖率法 中国南海 通量 源函数 

分 类 号：X131.1[环境科学与工程—环境科学]