【摘要】 用黄山气象站 1956~1995 年 40 年地面气象观测资料,分析了黄山云海的时空分布特征,云海与测站温度、湿度、降水和风的关系。结果表明,黄山年平均出现云海次数为223.85次,最多年份有 370 次,最少的年份只有 105 次,年际差异明显;并存在准12 a周期的低频变化现象。逐旬大于等于 8(5)成平均云海日数序列与测站逐旬平均气温序列相关系数为-0.89(-0.83),与测站逐旬平均相对湿度序列相关系数为-0.69(-0.61)。黄山云海形成的前一天或当天一般都有降水发生。统计分析各月大于等于 8 成云海与风关系,黄山云海出现时最多风向为西至西北风(除6月为东风外),平均风速 5.0 m/s,即黄山云海的出现与一定环流形势相联系。更多还原

【Abstract】 In this study,the meteorological data of surface observations at Huangshan station during 40-years (1956-1995) were used to analyze the features of cloud deck .The relation between cloud deck and temperature,humidity, and wind was given.The analyzed results show that the average number of cloud deck day was 223.85/year,which varied a lot among years,the annual amount of cloud deck day has quasi-twelve years cycle.The correlation coefficient between sequence dekad-to-dekad mean cloud deck day of cloudiness ≥80 %(50 %) and sequence dekad-to-dekad mean temperature is-0.89(-0.83),and sequence dekad-to-dekad mean humidity is-0.69(-0.61). Precipitation often appears in the day of cloud deck or the day before. More than 80 % cloud deck is related with west northwest wind (not including June),average wind velocity is <10.4 m/s. Appearance of cloud deck in Huangshan is associated with atmospheric circulation.更多还原