文章摘要
周冠博,吕爱民,黄彬,黄奕武,曹越男.2018年秋季海洋天气评述[J].海洋气象学报,2019,39(1):95-105
2018年秋季海洋天气评述
Autumn 2018 marine weather review
  
DOI:10.19513/j.cnki.issn2096-3599.2019.01.010
中文关键词: 大气环流  大风  热带气旋  浪高  海温
英文关键词: general atmospheric circulation  gale  tropical cyclone  wave height  sea surface temperature
基金项目:公益性行业(气象)科研专项(GYHY201206001);国家自然科学基金项目(41775048,41405049);国家重点研发计划项目(2017YFC1501604);中国气象局气象预报业务关键技术发展专项(YBGJXM(2018)1B)
作者单位
周冠博,吕爱民,黄彬,黄奕武,曹越男 (国家气象中心北京 100081) 
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中文摘要:
   2018年秋季(9—11月)大气环流特征为:北半球极涡呈偶极型分布,中高纬度西风带呈5波型分布,且强度较夏季增强。9—10月,副热带高压位置偏西,强度偏强,热带气旋活动频繁;中高纬度西风带较为平直,槽脊活动不明显;11月,经向环流增大,冷空气势力增强。我国近海海域出现了13次8级以上的大风过程,其中6次主要是由冷空气和热带气旋共同影响造成的,冷空气大风过程有5次,热带气旋影响的大风过程有2次。我国近海浪高在2 m以上的海浪过程有10次。西北太平洋和南海共生成8个台风和1个热带低压,全球其他各大洋共有28个热带气旋,较常年偏多。海面温度整体呈下降趋势。未出现雷暴大风和大范围的海雾过程。
英文摘要:
   The general atmospheric circulation in the northern hemisphere in autumn (from September to November) 2018 was characterized by the dipole polar vortex and five-wave mode westerlies in middle and high latitudes, which was stronger than that in summer. From September to October, the subtropical high was located abnormally westward with higher intensity, tropical cyclones were still active, and the westerly belt was straighter without significant ridge and trough. In November, cold air activities were intensified due to the enhanced meridional circulation. In autumn 2018, there were 13 gale processes above 8 grade over offshore areas of China, including 6 produced by cold air and tropical cyclones, 5 by cold air, two by tropical cyclones. There were 10 rough sea wave processes above two meters. In western North Pacific and the South China Sea, there were 8 typhoons and one tropical depression. In addition, there were 28 tropical cyclones over other oceans in the world, which was more than that in normal years. The sea surface temperature showed a downtrend tendency on the whole. In this season, there was no thunderstorm gale or large-scale sea fog process.
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