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气象:2017,43(12):1578-1583
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1971—2015年大连地区低风速气象特征分析
祝青林1,王丽娜2,徐梅3,牛桂萍4
(1 大连市旅顺口区气象局,大连 116041 2 大连市气象服务中心,大连 116001 3 天津市气象局,天津 300060 4 大连瓦房店市气象局,瓦房店 116300)
Characteristics of Low Wind Speed in Dalian from 1971 to 2015
ZHU Qinglin1,WANG Lina2,XU Mei3,NIU Guiping4
(1 Lüshunkou Meteorological Office of Dalian, Dalian 116041 2 Dalian Weather Service Centre, Dalian 110016 3 Tianjin Meteorological Service, Tianjin 300062 4 Wafangdian Weather Office of Dalian, Wafangdian 116300)
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投稿时间:2016-08-18    修订日期:2017-08-15
中文摘要: 利用1971—2015年大连地区7个国家气象站的气象资料, 统计低风速条件下的累积频率、日变化、月变化和持续性等特征,分析低风速频率空间分布和年际变化特征。结果表明: (1)大连地区低风速频率较低,平均约20%,地区间差异显著,近海区域长海站最低,为8%,内陆的普兰店地区较高,达32%。(2)近45年,低风速频率呈增加趋势,大连、长海和普兰店站增加趋势显著,特别是近10年增幅更大。(3)大连站低风速频率具有显著的日变化,主要表现为白天偏低、中午时段最低,夜间高,半夜达到最高。(4)3—7月,大连地区低风速频率低;9月至次年2月较高,最大值出现在9月。(5)低风速持续时间长海站最长,持续10 h以上低风速频率达到27%,持续20 h以上接近9%,大连站低风速持续时长最短,持续4 h以下的占85%。
Abstract:Based on the daily observation data of seven stations in Dalian from 1971 to 2015, the cumulative frequency the diurnal and monthly distributions of low wind speed are analyzed. The trend of annual percentage of low wind speed are also studied. The results show that: (1) The frequency of low wind speed conditions in Dalian is about 20% in the recent 45 years, with the lowest (8%) at Changhai, and the highest (35%) at Pulandian. (2) The frequency of low wind speed has an increasing trend, and there are significant increasing trends at Dalian, Pulandian and Changhai, especially in the past ten years. (3) The frequency of low wind speed conditions has significant diurnal changes, which is high over the night and low during the daytime. (4) From March to July, the frequency of low wind speed is low and from September to February it is higher with the maximum value seen in Dalian in September. (5) Changhai is the station with the longest duration of low wind speed. The 27% low wind-speed condition can last at least 10 h and the 9% low wind speed conditions can last at least 20 h at Changhai Station. Dalian Station is the station with the shortest duration, more than 85% low wind speed condition in Dalian Station can last 4 h or less.
文章编号:     中图分类号:P466    文献标志码:
基金项目:公益性行业(气象)科研专项(GYHY201206024)和环渤海区域科技协同创新基金项目(QYXM201502)共同资助
引用文本:
祝青林,王丽娜,徐梅,牛桂萍,2017.1971—2015年大连地区低风速气象特征分析[J].气象,43(12):1578-1583.
ZHU Qinglin,WANG Lina,XU Mei,NIU Guiping,2017.Characteristics of Low Wind Speed in Dalian from 1971 to 2015[J].Meteor Mon,43(12):1578-1583.