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冰川冻土 ›› 2021, Vol. 43 ›› Issue (5): 1383-1399.doi: 10.7522/j.issn.1000-0240.2021.0091

• 冰冻圈与全球变化 • 上一篇    下一篇

1961—2017年南极冰盖近地面风时空变化研究

殷宝玲(),刘琪,王叶堂()   

  1. 山东师范大学 地理与环境学院,山东 济南 250014
  • 收稿日期:2021-07-16 修回日期:2021-10-03 出版日期:2021-10-31 发布日期:2021-12-09
  • 通讯作者: 王叶堂 E-mail:1508269774@qq.com;yetangwang@sdnu.edu.cn
  • 作者简介:殷宝玲,硕士研究生,主要从事气候变化与区域响应研究. E-mail: 1508269774@qq.com
  • 基金资助:
    国家自然科学基金项目(41971081);国家重点研发计划项目(2020YFA0608202);中国科学院(A类)战略性先导科技专项(XDA19070103);山东省高等学校优秀青年创新团队项目(2019KJH011)

Spatial and temporal variations of the near-surface winds over the Antarctic Ice Sheet during 1961—2017

Baoling YIN(),Qi LIU,Yetang WANG()   

  1. College of Geography and Environment,Shandong Normal University,Jinan 250014,China
  • Received:2021-07-16 Revised:2021-10-03 Online:2021-10-31 Published:2021-12-09
  • Contact: Yetang WANG E-mail:1508269774@qq.com;yetangwang@sdnu.edu.cn

摘要:

基于19个人工气象站1961—2017年风速风向实测数据对南极冰盖近地面风速时空变化和风向进行了分析。结果表明:近50年来,南极冰盖近地面各季节平均风速和年平均风速变化的空间模式基本一致。东南极0°~120° E沿海地区风速呈显著上升趋势;南极半岛气象站风速变化趋势各异,且变化速率相差甚大,但从区域平均结果来看,南极半岛年和季节平均风速均呈上升趋势。这与近几十来局地气温、气压变化及南半球环状模趋向于正位相发展有关。东南极受下降风和绕极东风影响,大部分地区盛行偏南风或偏东风,且频率较高风向稳定;而受天气活动影响,南极半岛风向复杂,主风向频率低,风向多变。

关键词: 南极冰盖, 近地面风速, 近地面风向, 变化趋势

Abstract:

Based on the measured wind speed and wind direction data from 19 manned weather stations during 1961—2017, the temporal and spatial variations of near-surface wind speed and wind direction over the Antarctic ice sheet were analyzed. The results show similar spatial variability patterns between seasonal and annual mean near-surface wind speeds over the Antarctic Ice Sheet from 1961 to 2017. The wind speeds in the coastal area of 0°~120° E sector of East Antarctica showed a significant upward trend. The sign and magnitude of trends in the wind speeds from 6 meteorological stations on the Antarctic Peninsula are different. Both annual and seasonal wind speeds averaged over the 6 stations exhibited upward trends during 1961—2017. The upward trends were related to local warming, decline in the sea level pressure, and the positive polarity of the southern annular mode in recent decades. Southerly or easterly winds prevailed in most areas of East Antarctica, and the wind directions were stable. On the Antarctic Peninsula, influenced by frequently synoptic activities, the wind directions are variable, and it is not easy to determine the dominant wind direction.

Key words: Antarctic Ice Sheet, near-surface wind speed, wind direction, variation trends

中图分类号: 

  • P425.4