极地研究 ›› 2011, Vol. 23 ›› Issue (3): 205-216.DOI: 10.3724/SP.J.1084.2011.00205

• 研究论文 • 上一篇    下一篇

2010年夏季北极冰情变化及大气环流场演变

隋翠娟1,张占海2,凌铁军1,吴辉碇1,2,于乐江3
  

  1. 1. 国家海洋环境预报中心
    2. 中国极地研究中心
    3. 南京信息工程大学应用水文气象研究院
  • 收稿日期:2010-12-29 修回日期:2011-04-12 出版日期:2011-09-30 发布日期:2011-09-30
  • 通讯作者: 隋翠娟
  • 基金资助:

    北极海冰快速变化及其天气气候效应研究;太平洋入流水在Chukchi/Beaufort海输运过程及其对海冰变化影响的研究;极区海(冰)-气系统动力学过程的遥感监测和诊断技术

Status of Arctic Sea Ice and Atmospheric Circulation during the period of Chinese Fourth Arctic Research Expedition

Sui Cuijuan1Zhang Zhanhai2Ling Tiejun1Wu Huiding1,2Yu Lejiang3
  

  1. 1. National Marine Environmental Forecasting Center
    2. Polar Research Institute of China
    3. Applied Hydrometeorological Research Institute, Nanjing University of information Science & Technology
  • Received:2010-12-29 Revised:2011-04-12 Online:2011-09-30 Published:2011-09-30
  • Contact: Cui-Juan SUI

摘要:

利用美国冰雪中心(NSIDC)资料分析了中国第4次北极科考期间北极海冰的冰情变化,并通过NCEP再分析资料对同时期的大气环流演变进行分析,发现6月与8月环流形势为偶极子正异常,加速了海冰的融化,其中2010年6月的海冰覆盖范围达到有历史记录以来的6月最低值;7月为低压控制,减缓了海冰覆盖范围的进一步减少;2010年8月北极区域出现冰间水道和冰间湖,跨越极点由太平洋一侧到大西洋一侧大范围区域内海冰密集度小于80%。由此可见2010年夏季海冰覆盖范围及密集度变化主要受同期大气环流场的影响。此外,简单指出西北通道北线冰提前融化是受春季北极加拿大区域气温异常偏高引起。

关键词: 海冰漂移

Abstract:

Based on the data from National Sea Ice Data Center (NSIDC), we presented the Arctic sea ice extent and concentration during the Fourth Chinese Arctic Research Expedition 2010, and analyzed the corresponding atmospheric circulation using NCEP/NCAR reanalysis data. It was found that the positive dipole anomaly caused the increase of ice melt rates in June and August. The ice extent in June of this year reached the minimum of historical records in June. The melt rate was reduced in July due to the control of low pressure. In August, leads and polynyas presented in large area spanning the North Pole from Pacific Ocean to Atlantic Ocean where the ice concentration is lower than 80%. We therefore made the conclusion that the ice extent and concentration were significantly affected by the atmospheric circulation. Additionally, we also pointed out that the earlier clearing of sea ice along the Northwest Passage was caused by the abnormally higher temperature during springtime in the Canadian Arctic area.

Key words: Ice drift