秋冬季鄂霍次克海气旋活动对冰情的影响
DOI:
https://doi.org/10.29006/1564-2291.JOR-2025.53(4).6关键词:
鄂霍次克海, 冰盖, 大气环流, 气旋, 气旋活动, 统计分析, 遥感摘要
本研究分析了2001–2020年间大气环流特征与鄂霍次克海冰情(包括气旋影响)之间的相互关系。研究 基于欧洲中期天气预报中心( ECMWF)的ERA5再分析数据、日本气象厅( JMA)的五日海冰密集度 图及地面天气分析图。分析表明,在>87 %的气旋影响鄂霍次克海水域的事件中,至少在其一个区域(西 北部、东北部或南部)观测到海冰面积增长速率下降不低于10 %,其中>52 %的事件属于中心型气旋影 响, >35 %为南部型气旋影响。研究评估了气旋在秋冬季节海冰发展期间对冰盖的影响强度,并依据冰情 严酷程度对季节进行了类型划分。计算了气旋过境期间导致冰情增长减缓的季内最大值。揭示了风场的u 分量和地面气压均方差与鄂霍次克海整体及其各分区海冰面积变化速率之间的相互关系。明确了在受中 心型或南部型气旋影响与不受影响条件下,大气环流指标平均值之间的最大差异,具体涉及风场的u和v 分量、风速、地面气压及其均方差。通过对大气环流指标和冰情参数的分析,定量评估了不同大气过程对 冰盖形成的贡献,这有助于开发冰情预报的新方法。
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2025-12-21
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海洋物理学与气候
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