...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Polar biology >The relative contributions of biological and abiotic processes to carbon dynamics in subarctic sea ice
【24h】

The relative contributions of biological and abiotic processes to carbon dynamics in subarctic sea ice

机译：生物和非生物过程对北极海冰碳动态的相对贡献

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Knowledge on the relative effects of biological activity and precipitation/dissolution of calcium carbonate (CaCO_3) in influencing the air-ice CO_2 exchange in sea-ice-covered season is currently lacking. Furthermore, the spatial and temporal occurrence of CaCO_3 and other biogeochem-ical parameters in sea ice are still not well described. Here we investigated autotrophic and heterotrophic activity as well as the precipitation/dissolution of CaCO_3 in subarctic sea ice in South West Greenland. Integrated over the entire ice season (71 days), the sea ice was net autotrophic with a net carbon fixation of 56 mg C m~(-2), derived from a sea-ice-related gross primary production of 153 mg C m~(-2) and a bacterial carbon demand of 97 mg C m~(-2). Primary production contributed only marginally to the TCO_2 depletion of the sea ice (7-25 %), which was mainly controlled by physical export by brine drainage and CaCO_3 precipitation. The net biological production could only explain 4 % of this sea-ice-driven CO_2 uptake. Abiotic processes contributed to an air-sea CO_2 uptake of 1.5 mmol m~(-2) sea ice day"', and dissolution of CaCO_3 increased the air-sea CO_2 uptake by 36 % compared to a theoretical estimate of melting CaCO_3-free sea ice. There was a considerable spatial and temporal variability of CaCO_3 and the other biogeochemical parameters measured (dissolved organic and inorganic nutrients).
机译：目前尚缺乏关于生物活性和碳酸钙（CaCO_3）的沉淀/溶解对影响海冰覆盖季节中的空气冰CO_2交换的相对影响的知识。此外，海冰中CaCO_3和其他生物地球化学参数的时空分布还没有得到很好的描述。在这里，我们调查了西南格陵兰岛北极亚冰海中的自养和异养活动以及CaCO_3的沉淀/溶解。在整个冰期（71天）内整合后，海冰是自养型的，净碳固着力为56 mg C m〜（-2），源于与海冰有关的一次总生产量153 mg C m〜 （-2）和97 mg C m〜（-2）的细菌碳需求。初级生产对海冰的TCO_2损耗（7-25％）仅贡献很小，这主要受盐水排泄和CaCO_3沉淀的物理出口控制。净生物产量只能解释这种海冰驱动的CO_2吸收量的4％。非生物过程促进了1.5 mmol m〜（-2）海冰日的空气-海洋CO_2吸收，并且与理论上的无CaCO_3融化的理论估计相比，CaCO_3的溶解使空气-海洋CO_2吸收增加了36％。 CaCO_3和其他测得的其他生物地球化学参数（溶解的有机和无机养分）有很大的时空变化。

著录项

  • 来源
    《Polar biology》 |2013年第12期|1761-1777|共17页
  • 作者

    Dorte Haubjerg Sogaard; David N. Thomas; SOren Rysgaard; Ronnie NOhr Glud; Louiza Norman; Hermanni Kaartokallio; Thomas Juul-Pedersen; Nicolas-Xavier Geilfus;

  • 作者单位

    Greenland Climate Research Centre (C/O Greenland Institute of Natural Resources), Kivioq 2, Box 570, 3900 Nuuk, Greenland,University of Southern Denmark, Campusvej 55,5230 Odense M, Denmark;

    School of Ocean Sciences, Bangor University,Menai Bridge, Anglesey LL59 5AB, UK,Finnish Environment Institute, Marine Research Centre,Erik Palmenin Aukio 1, 00560 Helsinki, Finland,Arctic Research Centre, Aarhus University, C.F. M0llers Alle 8,bldg. 1110, 8000 Aarhus C. Denmark;

    Greenland Climate Research Centre (C/O Greenland Institute of Natural Resources), Kivioq 2, Box 570, 3900 Nuuk, Greenland,Arctic Research Centre, Aarhus University, C.F. M0llers Alle 8,bldg. 1110, 8000 Aarhus C. Denmark,Centre for Earth Observation Science, CHR Faculty of Environment Earth and Resources, University of Manitoba,499 Wallace Building, Winnipeg, MB R3T 2N2, Canada;

    Greenland Climate Research Centre (C/O Greenland Institute of Natural Resources), Kivioq 2, Box 570, 3900 Nuuk, Greenland,University of Southern Denmark, Campusvej 55,5230 Odense M, Denmark,Scottish Association for Marine Science, Scottish Marine Institute, Oban, UK;

    School of Ocean Sciences, Bangor University,Menai Bridge, Anglesey LL59 5AB, UK;

    Finnish Environment Institute, Marine Research Centre,Erik Palmenin Aukio 1, 00560 Helsinki, Finland;

    Greenland Climate Research Centre (C/O Greenland Institute of Natural Resources), Kivioq 2, Box 570, 3900 Nuuk, Greenland;

    Centre for Earth Observation Science, CHR Faculty of Environment Earth and Resources, University of Manitoba,499 Wallace Building, Winnipeg, MB R3T 2N2, Canada;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Subarctic; Sea ice; Spatial variability •CaCO_3; Net biological production; DOC and DON;

    机译：亚北极海冰;空间变异性•CaCO_3;净生物生产;DOC和DON;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号