主办单位:中国气象局沈阳大气环境研究所
国际刊号:ISSN 1673-503X
国内刊号:CN 21-1531/P

气象与环境学报 ›› 2021, Vol. 37 ›› Issue (3): 125-131.doi: 10.3969/j.issn.1673-503X.2021.03.017

• 论文 • 上一篇    下一篇

辽宁电线覆冰日数气候特征与大气环流异常的关系

孙秀博1,2(),张婉莹3,张建强4,罗聪5   

  1. 1. 中国气象局沈阳大气环境研究所, 辽宁 沈阳 110166
    2. 东北冷涡研究重点开放实验室, 辽宁 沈阳 110166
    3. 辽宁省气象服务中心, 辽宁 沈阳 110166
    4. 本溪市人工影响天气办公室, 辽宁 本溪 117000
    5. 辽宁省气象学会, 辽宁 沈阳 110166
  • 收稿日期:2021-01-04 出版日期:2021-06-30 发布日期:1900-01-01
  • 作者简介:孙秀博, 男, 1986年生, 助理研究员, 主要从事数值预报和气候变化诊断研究, E-mail: gavin1813@163.com
  • 基金资助:
    辽宁省气象局重点科研项目(201602);辽宁省气象局科研项目(201911);中国气象局沈阳大气环境研究所和东北冷涡研究重点实验室联合开放基金重点项目(2020SYIAEZD5)

The relationship between climate characteristics of wire icing days in Liaoning province and atmospheric general circulation anomalies

Xiu-bo SUN1,2(),Wan-ying ZHANG3,Jian-qiang ZHANG4,Cong LUO5   

  1. 1. Institute of Atmospheric Environment, Shenyang, 110166, China
    2. Key Opening Laboratory for Northeast China Cold Vortex Research, Shenyang 110166, China
    3. Meteorological Service Center in Liaoning Province, Shenyang, 110166, China
    4. Benxi Weather Modification Office, Benxi 117000, China
    5. Meteorological Society in Liaoning Province, Shenyang 110166, China
  • Received:2021-01-04 Online:2021-06-30 Published:1900-01-01

摘要:

利用1980—2019年辽宁地区11个有电线覆冰观测项目的气象站资料、NCEP再分析资料和Hadley海温资料,分析辽宁电线覆冰日的气候特征以及利于覆冰发生的环流特征和影响因素。结果表明:辽宁电线覆冰现象出现次数存在三个高值地区,分别为辽宁北部地区、辽东山区和辽宁中西部沿海地区。辽宁电线覆冰主要发生在10月至翌年4月,1980—2019年辽宁电线覆冰日数呈显著减少趋势。电线覆冰日数具有显著的年际变化周期,主要的年际变化周期为5—7 a,近40 a年际振荡能量经历了3次增强—减弱的变化。辽宁覆冰高指数年与低指数年秋季9—11月SST距平之差表现为El Nino型分布。覆冰日数异常偏多年,太平洋海温呈现El Nino型,西北太平洋海表温度整体偏冷,日本海区海表温度存在明显负异常;同时大陆上贝加尔湖上空存在高压中心,北半球亚洲地区纬向为“北高南低”的形式,冬季风偏强,冷空气南下频繁。辽宁受到贝加尔湖异常反气旋环流东南侧东北气流控制,鄂霍茨克海上空存在弱反气旋环流,导致日本海上空有异常东风,当南下冷空气与东侧日本海输送的偏冷水汽交汇,容易导致温度较冷的大雾,引发雾凇现象,过冷水汽在电线上凝结,导致电线覆冰现象的发生。

关键词: 电线覆冰, 气候特征, 环流特征

Abstract:

Using data from 11 meteorological stations with wire icing observation projects in Liaoning province from 1980 to 2019, NCEP reanalysis data, and Hadley sea surface temperature data, the climatic characteristics of the icing days of Liaoning electrical generators and the circulation characteristics that were conducive to the occurrence of icing were analyzed.The results show that there are three high value regions for the occurrence of wire icing phenomenon in Liaoning province, which are in the northern area of Liaoning province, the mountainous area in eastern Liaoning, and the coastal area of central and western Liaoning province.The wire icing phenomenon in Liaoning province mainly occurs from October of the current year to April of the following year, and the number of wire icing days from 1980 to 2019 shows a significant decrease.The number of wire icing days has a significant interannual variation cycle, the main interannual variation period is 5-7 years, and the interannual oscillation energy has undergone 3 changes of strength-weakening in the recent 40 years.The difference of SST anomaly between high index years and low index years in Autumn from September to November in Liaoning province shows the distribution of El Nino type.The SST in the Pacific presents El Nino type in the more wire icing year, the overall SST in the Northwest Pacific is relatively cold, and the SST in the sea of Japan has an obvious negative anomaly.At the same time, there is a high pressure center over Lake Baikal on the mainland, and the latitudinal direction of the northern hemisphere in Asia is "high in the north and low in the south".The winter monsoon is stronger, and the cold air moves southward frequently.Liaoning province is controlled by the northeast airflow, on the southeast side of the abnormal anticyclonic circulation of Lake Baikal, and there is a weak anticyclonic circulation over the Sea of Okhotsk which leads to an abnormal east wind over the Sea of Japan.When the southbound cold air and the east side of the Sea of Japan transport cold water vapor intersection, it is easy to lead to the cold fog, causing the rime phenomenon.The supercooled water vapor condenses on the wires and causes the wires to become iced.

Key words: Wire icing, Climatic characteristics, Circulation characteristics

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