作　　者： ; ; ;

机构地区： 广东海洋大学海洋与气象学院

出　　处： 《电波科学学报》 2012年第2期268-274,共7页

摘　　要： 根据1998年南海季风试验期间南海部分探空站、‘科学1号’和‘实验3号’观测的每天4次的高分辨率探空资料,引入截止波长判断式,统计分析了南海季风期间较强大气波导发生规律及时空分布特征。结果表明:季风期间南海较强大气波导的发生概率为30%左右,从北到南逐渐增加,波导层结高度逐渐降低,70%以上发生在1km高度之内;大气波导发生概率和层结高度呈现‘低-高-低’的日变化趋势,夜晚发生波导概率较高,深夜波导层结高度最低,比较稳定。 Based on the sounding data four times a day observed on related sounding station, R/V ＂Kexue 1＂ and R/V ＂Shiyan 3＂ during the South China Sea Monsoon Experiment （SCSME）, the characteristic parameters of strong atmospheric ducts such as occurrences, duct height etc are analyzed using the cutoff wavelength formula. The results show that the probability of the lower strong atmospheric ducts occurring over the South China Sea （SCS） is about 30% during the Monsoon period and rises gradually from the north to the south of the SCS. However, the atmospheric duct heights are gradually low from north to south and 70 % of occurred duct heights are within lkm height from the mean sea level. The total tendency of the daily variability of the probability of the occurrence and duct height is similar and shows ＂low-high low＂ shape. The probability of the occurrence in the nighttime is a little bit higher than other time and duct height is lower and more stable in the late at night.

关 键 词： 南海季风试验 大气波导 统计特征

领　　域： [电子电信]