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北冰洋表层积雪中7Be、210Po和210Pb的分布特征

刘楚越 钟强强 黄德坤 陈随缘 王浩 于涛

刘楚越,钟强强,黄德坤,等. 北冰洋表层积雪中7Be、210Po和210Pb的分布特征[J]. 海洋学报,2021,43(10):1–7 doi: 10.12284/hyxb2021138
引用本文: 刘楚越,钟强强,黄德坤,等. 北冰洋表层积雪中7Be、210Po和210Pb的分布特征[J]. 海洋学报,2021,43(10):1–7 doi: 10.12284/hyxb2021138
Liu Chuyue,Zhong Qiangqiang,Huang Dekun, et al. Distribution characteristics of 7Be, 210Po and 210Pb in the surface snow of the Arctic Ocean[J]. Haiyang Xuebao,2021, 43(10):1–7 doi: 10.12284/hyxb2021138
Citation: Liu Chuyue,Zhong Qiangqiang,Huang Dekun, et al. Distribution characteristics of 7Be, 210Po and 210Pb in the surface snow of the Arctic Ocean[J]. Haiyang Xuebao,2021, 43(10):1–7 doi: 10.12284/hyxb2021138

北冰洋表层积雪中7Be、210Po和210Pb的分布特征

doi: 10.12284/hyxb2021138
基金项目: 福建省社会发展引导性(重点)项目(2018Y0059);广西壮族自治区科技计划资助项目(2017AB30024);自然资源部第三海洋研究所基本科研业务费专项(海三科2018029)
详细信息
    作者简介:

    刘楚越(1996-),男,浙江省衢州市人,主要研究方向为海洋科学。E-mail:liucy9527@163.com

    通讯作者:

    黄德坤,男,副研究员,主要研究方向为同位素海洋学。E-mail:dkhuang@tio.org.cn

    于涛,女,研究员,主要研究方向为海洋化学。E-mail:yutao@tio.org.c

  • 中图分类号: P734

Distribution characteristics of 7Be, 210Po and 210Pb in the surface snow of the Arctic Ocean

  • 摘要: 大气输送的放射性核素7Be、210Po和210Pb,可以作为研究北冰洋大气沉降通量、海洋现代沉积以及海冰中物质传输的重要示踪剂,已被广泛应用于包括气团运动、土壤侵蚀以及水系统中颗粒物循环过程的研究。本文报道了2018年北极高纬度浮冰区表层积雪中7Be、210Po和210Pb的活度特征。7Be、210Po和210Pb的比活度变化范围分别为33.6~632.68 mBq/L、36.2~87.5 mBq/L、30.9~194.49 mBq/L。本文的研究发现,北冰洋表层积雪中7Be和210Pb比活度小于中纬度大陆地区。研究区域表层积雪中7Be的比活度随着纬度的增加而增加。此外,表层积雪中210Po/210Pb活度比值范围为0.70~1.48 (平均为0.93),210Po与210Pb活度已基本达到平衡,表明积雪样品年龄可能较“老”。
  • 图  1  北冰洋表层积雪采样站位

    Fig.  1  Sampling locations of snow in the Arctic Ocean

    图  2  北极表层雪中3种核素的比活度

    Fig.  2  The activity concentration of three nuclides in the surface snow of the Arctic Ocean

    图  3  210Po、210Pb和7Be的比活度随着纬度变化的变化

    Fig.  3  Activity concentrations of 210Po, 210Pb and 7Be vs latitude

    图  4  210Po/210Pb、7Be/210Pb和7Be/210Po的活度比值

    Fig.  4  Activity ratio of 210Po/210Pb, 7Be/210Pb and 7Be/210Po

    表  1  不同纬度的7Be和210Pb的沉降通量

    Tab.  1  Atmospheric deposition flux of 7Be and 210Pb at different latitude

    研究区域采样时间纬度经度来源7Be 比活度/(Bq·L−1)210Pb 比活度/(mBq·L−1)数据来源
    北冰洋2018年8月79.22°~84.72°N−169.4°~−156.1°E降雪0.034~0.6330.9~194本文
    北冰洋2011年9月84.07°~84.39°N−164.2°~166.4°E降雪0.43~2.5[13]
    新墨西哥州索科罗1992年12月降雪0.3741.2[28]
    格陵兰岛1988年11月至1989年2月65.17°N−40.73°E降雪0.23~2.164.07~109[29]
    格陵兰岛1989年6−7月65.17°N−40.73°E降雪0.4~1.044.1~110[30]
    格陵兰岛1989年6−7月72.33°N−38.75°E降雪0.04~1.271.85~111.4[30]
    上海2006−2011年31.22°N121.38°E降雨1.260.31×103[2]
    日本,筑波 2000−2001年36.05°N−140.13°E降雨0.860.14×103[31]
    德克萨斯州加尔维斯顿1988年12月至1992年2月29.3°N−94.8°E降雨0.09~20.7(0.031~3.6)×103[32]
    College Station, Texas1988年12月至1992年2月30.58°N−96.37°E降雨0.26~4.96(0.036~0.428)×103[32]
    西班牙韦尔瓦2009年4月至2010年8月37.27°N6.92°E降雨0.03~7.42(0.005~1.07)×103[33]
    摩纳哥1998年1月至2010年12月43.83°N7.5°E降雨0.4~8.6(0.02~1.9)×103[34]
    加州圣克鲁斯2009年10月至2010年9月37°N−122°E降雨1.3~4.4[35]
    纽约石溪2008年4月至2009年12月40.9°N−73.12°E降雨1.3~4.555~255[36]
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  • 收稿日期:  2021-04-27
  • 修回日期:  2021-05-31
  • 网络出版日期:  2021-06-21

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