极地研究

极地研究 ›› 2018, Vol. 30 ›› Issue (2): 154-160.DOI: 10.13679/j.jdyj.20170021

• 研究论文 • 上一篇    下一篇

1979—2015 年罗斯海海冰运动速度变化

刘伊格1,2,3 柯长青1 张杰2   

  1. 1. 南京大学地理与海洋科学学院, 江苏 南京 210023
    2. 国家海洋局第一海洋研究所, 山东 青岛 266061
    3. 中国南海研究协同创新中心, 江苏 南京 210023
  • 收稿日期:2017-06-29 修回日期:2017-09-19 出版日期:2018-06-30 发布日期:2018-06-30
  • 通讯作者: 柯长青
  • 基金资助:

    国家自然科学基金(41371391)、国家重点研发计划项目(2016YFA0600102)资助

Variation of sea ice motion velocity in the Ross Sea (1979–2015)

Liu Yige1,2,3, Ke Changqing1, Zhang Jie2   

  • Received:2017-06-29 Revised:2017-09-19 Online:2018-06-30 Published:2018-06-30
  • Supported by:

    National Natural Science Foundation of China

PDF (PC)

937

摘要：

基于美国冰雪数据中心的月平均海冰运动和海冰密集度数据, 建立了1979—2015 年罗斯海海冰运动
速度时间变化序列, 揭示了海冰运动速度的年际和季节变化特征, 探讨了海冰运动速度和海冰范围之间可
能存在的联系, 最后对影响海冰运动速度变化的因素进行了分析。结果表明, 1979—2015 年罗斯海海冰运动
速度总体呈现加快趋势, 海冰运动速度增加趋势最快的季节为秋季, 其次是冬季、春季和夏季。冬季海冰平
均运动速度最大, 依次是秋季、春季和夏季。海冰运动速度与海冰范围在37 年间均呈现上升趋势, 海冰范
围变化滞后海冰运动速度1—2 个月, 两者呈显著正相关关系, 海冰运动速度的增加导致罗斯海海冰范围不
断扩张, 进而影响南极整体海冰分布。罗斯海海冰运动速度与风速之间存在显著正相关关系, 风场是影响海
冰运动速度的一个直接因素。除此之外, 海冰运动还受到包括气压场、洋流场以及海洋阻力系数等的影响。

关键词: 罗斯海, 海冰运动速度, 海冰密集度, 海表面风速

Abstract:

Using data of monthly mean sea ice motion velocity and sea ice concentration, provided by the National Snow
and Ice Data Center, we established the temporal variation of sea ice motion velocity in the Ross Sea (1979–2015).
The interannual and seasonal variational characteristics of sea ice motion velocity were revealed, as was the relationship
between sea ice motion velocity and sea ice extent. Finally, the factors influencing the variation of sea ice
motion velocity were analyzed. The results showed that sea ice motion velocity in the Ross Sea increased during
1979–2015; the rate of increase was fastest in autumn, followed by winter, spring, and summer. The average motion
velocity of sea ice in winter was highest, followed by autumn, spring, and summer. The sea ice motion velocity and
sea ice extent both showed increasing trends over the 37-year period. Although the variation of sea ice motion velocity
lagged sea ice extent by 1–2 months, significant positive correlation was found between them, and the increase
of sea ice motion velocity caused the extent of sea ice to expand, affecting the distribution of Antarctic sea ice.
Significant positive correlation was found between sea ice motion velocity and wind speed in the Ross Sea, indicating
that the wind field was a factor contributing directly to the variation of sea ice motion velocity. In addition, sea
ice motion was also affected by the pressure field, ocean currents, and ocean drag coefficient.

Key words: Ross Sea, sea ice motion velocity, sea ice concentration, sea surface wind