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基于^(210)Po/^(210)Pb不平衡的南大洋与南海颗粒有机物的输出与再矿化 被引量：3

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摘要 对南大洋及南海上层水体210Po/210Pb不平衡进行了研究,发现表层水体210Po亏损,次表层或中层水体210Po过剩,且颗粒态210Po比活度与颗粒有机碳(POC)之间存在良好的正相关关系,证实210Po相对于其母体210Pb的亏损与过剩可示踪颗粒有机物的输出与再矿化.次表层水体中δ13C的减小及δ15N的增大等证据均支持210Po的过剩缘自颗粒有机物的再矿化.根据箱式模型计算得南大洋和南海表层水体POC输出通量分别为1.2和2.3mmolC·m-2·d-1,次表层或中层水体210Po再矿化通量分别为0.062和0.566Bq·m-2·d-1,相应的再循环效率分别为52%±26%和119%±52%,由此得到次表层或中层水体POC的再矿化通量分别为0.6和2.7mmolC·m-2·d-1.本研究的结果表明210Po/210Pb不平衡不仅可示踪颗粒有机物的输出,亦可示踪其再矿化.
作者 杨伟锋 黄奕普 陈敏 邱雨生 彭安国 张磊
机构地区 厦门大学海洋学系
出处 《科学通报》 EI CAS CSCD 北大核心 2009年第11期1579-1584,共6页 Chinese Science Bulletin
基金 国家自然科学基金(批准号:40576037 90411016) 国家科技支撑计划(编号:2006BAB19B03) 国际海底区域研究开发"十一五"项目(编号:DYXM-115-01-3-04)资助
关键词 210Po/210Pb不平衡 POC通量 再矿化 南大洋 南海
分类号 P734.5 [天文地球—海洋化学]
  • 相关文献

参考文献29

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二级参考文献33

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2009年 第11期

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