2005—2015年廬山云海時(shí)間變化特征及氣象條件分析

doi:10.3969/2019jms.0034

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2005—2015年廬山云海時(shí)間變化特征及氣象條件分析
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                        10.3969/2019jms.0034
                    
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中圖分類號(hào):330029
基金項(xiàng)目:江西省氣象科技項(xiàng)目；江西省氣象科技重點(diǎn)項(xiàng)目

Temporal distribution characteristics and meteorological conditions of cloud deck event in Lushan Mountain from 2005 to 2015

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采用經(jīng)驗(yàn)頻率分布、趨勢(shì)分析等統(tǒng)計(jì)分析方法，分析了廬山氣象站2005-2015年云海時(shí)間變化特征及其與氣溫、相對(duì)濕度和風(fēng)向風(fēng)速等氣象要素的關(guān)系。結(jié)果表明：（1）廬山云海平均年日數(shù)為133.73 d，最多年份為172 d（2005年），最少年份為106 d（2012年），云海日數(shù)呈遞減趨勢(shì)。（2）廬山云海適宜的氣象條件為：平均氣溫8.7~21.0℃，最高氣溫12.7~24.7℃，最低氣溫5.7~18.6℃，相對(duì)濕度 ≥ 82%，風(fēng)速1.9~4.8 m·s^-1，風(fēng)向?yàn)镾SE和S。和無云海時(shí)相比，有云海時(shí)氣溫要素整體偏高，相對(duì)濕度條件更好，風(fēng)速頻率分布接近。（3）在2005-2015年的云海日中，有效探空數(shù)據(jù)共1 840時(shí)次，其中500時(shí)次出現(xiàn)逆溫，占27.2%；平均逆溫層底高度為793.1 m，平均逆溫層厚度為1 054.4 m，平均逆溫強(qiáng)度為0.25℃·（100 m）^-1，均大于無云海時(shí)的逆溫參數(shù)。有云海時(shí)，逆溫層底高度300~2 000 m和逆溫強(qiáng)度大于等于0.4℃·（100 m）^-1所占百分比較無云海時(shí)更大，表明有云海時(shí)逆溫層底更高，逆溫層更厚，逆溫強(qiáng)度更強(qiáng)。

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By using statistical analysis methods such as empirical frequency distribution and trend analysis, the temporal distribution characteristics of cloud deck events from 2005 to 2015 are analyzed, and suitable meteorological conditions like temperature, humidity and wind are studied. The empirical frequency distribution and box plot of meteorological elements were analyzed by statistical method. The five eigenvalues were used to characterize the suitable meteorological conditions of Lushan cloud deck events. The results show that:(1) The average number of cloud deck event is 133.73 d per year, the most year is 2005 for 172 d, and least year is 2012 for 106 d. The number of cloud deck event is decreasing. (2) The suitable meteorological conditions for cloud deck event are daily mean temperature is between 8.7 and 21.0 degree, daily mean humidity is higher than 82%, daily 2 m wind speed is between 1.9 and 4.8 m·s^-1. Compared with nocloud deck days, the temperature factor is higher, the relative humidity condition is better, and the wind speed frequency distribution is familiar. (3) There are 500 times accounting for 27.2% of temperature inversions from 2005 to 2015, the average height of the bottom of temperature inversion is 793.1 m, the thickness of temperature inversion is 1 054.4 m, the intensity of temperature is 0.25℃·(100 m)^-1. In cloud deck event the percentage of inversion bottom height from 300 to 2 000 m and inversion intensity higher than 0.4℃·(100 m)^-1 is larger than the no cloud deck days. Which indicates that the inversion bottom is higher, the inversion layer is thicker and the inversion intensity is stronger in cloud deck event.

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肖雯,劉春,汪如良,凌婷,張小鵬.2005—2015年廬山云海時(shí)間變化特征及氣象條件分析.氣象科學(xué),2020,40(6):859-867 XIAO Wen, LIU Chun, WANG Ruliang, LING Ting, ZHANG Xiaopeng. Temporal distribution characteristics and meteorological conditions of cloud deck event in Lushan Mountain from 2005 to 2015. Journal of the Meteorological Sciences,2020,40(6):859-867

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收稿日期:2019-01-16
最后修改日期:2019-07-06
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在線發(fā)布日期: 2021-01-12
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