Variations and Influence of Cloud Cover in Heze Region in Recent 52 Years

• 作者: Dou Kun
• 来源期刊: 气象与环境研究：英文版
• 学科: 地球科学
• 关键词: 菏泽地区 覆盖变化 平均降水量 平均气温 西南部地区 日照时数 回火温度 夏秋季
• 年，卷（期）: 2015,（11）
• 页码范围: 6-8
• 页数: 3页
• 分类号: P467

摘要

Based on the data of cloud cover,precipitation,temperature,sunshine hours and relative humidity from nine ground meteorological stations in Heze region in the southwest of Shandong Province from 1961 to 2012,changes of total and low cloud cover and its relationship with climatic factors associated in the southwest of Shandong Province in recent 52 years were analyzed.The results showed that average total cloud cover increased by 0.89%/10 a,but average low cloud cover decreased by 1.1%/10 a in Heze region in recent 52 years.The positive correlation between the average total cloud cover and temperature in autumn and winter was obvious,that is,when cloud cover increased by 10%,the average temperature increased by 0.48 ℃ in autumn and increased by 0.83℃ in winter.The average low cloud cover negatively correlated with the average temperature in each season,and the negative correlation was very significant in spring.When cloud cover increased by 10%,the average temperature decreased by 1.49 ℃.The positive correlation between the average cloud cover and average precipitation was significant.The annual precipitation increased by 146.1 mm when annual mean total cloud cover increased by 10%.When seasonal mean cloud cover increased by 10%,the precipitation increased by 48.4,107.1,55.4 and 12.2 mm in spring,summer,autumn and winter respectively.The annual average total cloud cover and low cloud cover had significantly positive correlation with ≥0.1,≥1.0,≥10 and ≥25 mm precipitation days respectively.The sunshine hours were seriously influenced by cloud cover,and when cloud cover increased by 10%,the sunshine hours decreased by 54.5 h in spring,134.2 h in summer,154.3 h in autumn and 60.6 h in winter.The total cloud cover significantly positively correlated with relative humidity in summer and autumn,and when cloud cover increased by 10%,the relative humidity increased by 3.3% in summer and 4.1% in autumn.