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基于海冰密集度的消退起始时间判别方法改进研究与应用

杨毅 聂红涛 董春明 魏皓

杨毅,聂红涛,董春明,等. 基于海冰密集度的消退起始时间判别方法改进研究与应用[J]. 海洋学报,2021,43(7):152–161 doi: 10.12284/hyxb2021145
引用本文: 杨毅,聂红涛,董春明,等. 基于海冰密集度的消退起始时间判别方法改进研究与应用[J]. 海洋学报,2021,43(7):152–161 doi: 10.12284/hyxb2021145
Yang Yi,Nie Hongtao,Dong Chunming, et al. Improved estimation method of retreat onset dates based on sea ice concentration[J]. Haiyang Xuebao,2021, 43(7):152–161 doi: 10.12284/hyxb2021145
Citation: Yang Yi,Nie Hongtao,Dong Chunming, et al. Improved estimation method of retreat onset dates based on sea ice concentration[J]. Haiyang Xuebao,2021, 43(7):152–161 doi: 10.12284/hyxb2021145

基于海冰密集度的消退起始时间判别方法改进研究与应用

doi: 10.12284/hyxb2021145
基金项目: 国家自然科学基金重点项目(41630969);国家重点研发计划(2016YFC1401401)
详细信息
    作者简介:

    杨毅(1997-),男,黑龙江省双城市人,主要从事海洋海冰动力学方面研究。E-mail:yangy27@tju.edu.cn

    通讯作者:

    聂红涛,副教授,主要从事海洋环境动力学方面研究。 E-mail:htnie@tju.edu.cn

  • 中图分类号: P731.15

Improved estimation method of retreat onset dates based on sea ice concentration

  • 摘要: 海冰融化过程以正反馈的形式影响着海洋的热量吸收,对北极生态环境的变化和经济活动的开展起着重要作用。基于1979–2018年北冰洋逐日海冰密集度数据,本文综合考虑不同海域海冰冰况等因素,对北冰洋边缘海海冰消退起始时间的判别方法进行了改进。通过不同的方案对比分析表明,改进后的方法能够反映不同海域、不同年份冰情的变化;并且可消除一些天气扰动现象的干扰,避免过早地判别消退起始时间。应用本方法分析发现北冰洋各边缘海消退起始时间存在提前的趋势,与融化起始时间的提前趋势较为一致。但是不同海域提前程度存在明显差异,喀拉海和楚科奇海提前消退的趋势最强,达到了9 d/(10 a),而东西伯利亚海消退提前趋势最弱,只有4 d/(10 a),区域间的差异逐渐增大。海冰消退起始时间存在显著的年际差异,各边缘海的标准差均在15 d左右,近10年中消退最早与最晚之间的差值最大可达50 d,出现在波弗特海。
  • 图  1  研究区域

    不同的颜色区分了北冰洋内各子区域的界限

    Fig.  1  Study areas

    Different colors distinguish the boundaries of subregions in the Arctic Ocean

    图  2  1979–2018年喀拉海消退起始时间判别结果

    Fig.  2  Estimated results of retreat onset dates in the Kara Sea during 1979–2018

    图  3  2008年、2012年喀拉海空间平均海冰密集度时间序列

    Fig.  3  Time series of spatial averaged sea ice concentration in the Kara Sea in 2008 and 2012

    图  4  2017年3–4月喀拉海海冰密集度空间分布

    Fig.  4  Spatial distributions of sea ice concentration in the Kara Sea during March and April 2017

    图  5  2017年喀拉海空间平均海冰密集度时间序列

    Fig.  5  Time series of spatial averaged sea ice concentration in the Kara Sea in 2017

    图  6  1979–2017年AHRA与SICA判别的消退起始时间结果对比

    时间从1月1日起算

    Fig.  6  Annual retreat onset dates estimated by AHRA and SICA during 1979–2017

    It starts on January 1st

    图  7  1996年东西伯利亚海空间平均海冰密集度时间序列

    Fig.  7  Time series of spatial averaged sea ice concentration in the East Siberian Sea in 1996

    图  8  1979–1988年及2009–2018年各海域消退起始时间平均值与标准差

    Fig.  8  Mean and standard deviation of retreat onset dates in different seas during 1979–1988 and 2009–2018

    表  1  1979−2017年SICA判别的消退起始时间与AHRA方法的平均值与趋势对比

    Tab.  1  Mean and trend differences of retreat onset dates estimated by SICA and AHRA during 1979−2017

    海域平均值/d趋势/(d·(10 a)−1
    AHRASICAAHRASICA
    楚科奇海137±13147±15–8*–9*
    东西伯利亚海148±14165±16–9*–4*
    拉普捷夫海143±12153±18–7*–8*
    喀拉海126±14140±16–9*–9*
    波弗特海148±10157±17–7*–7*
    注:*表示变化趋势通过95%置信度检查。时间从1月1日起算。
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-04-06
  • 修回日期:  2021-06-01
  • 网络出版日期:  2021-06-24
  • 刊出日期:  2021-07-25

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