极地研究 ›› 2014, Vol. 26 ›› Issue (2): 193-200.DOI: 10.13679/j.jdyj.2014.2.193

• 研究论文 • 上一篇    下一篇

中国第26次南极考察南大洋碳通量评估

许苏清1 陈立奇1 陈海颖2   

  1.  
    1国家海洋局海洋-大气化学与全球变化重点实验室,国家海洋局第三海洋研究所,福建 厦门361005;
    2海洋声学与遥感开放实验室,国家海洋局第三海洋研究所,福建 厦门361005
  • 收稿日期:2013-05-30 修回日期:2013-08-08 出版日期:2014-06-30 发布日期:2014-06-30
  • 通讯作者: 许苏清
  • 基金资助:

    海洋三所基础科研业务费;海洋赤潮灾害立体监测技术与应用国家海洋局重点实验室开放研究基金;南北极环境综合考察与评估专项项目专项;国家自然科学基金重点项目;国家海洋局极地考察办公室对外合作支持项目

ESTIMATION ON CARBON FLUX IN THE SOUTHERN OCEAN DURING THE 26TH CHINARE

Xu Suqing1, Chen Liqi1,Chen Haiying2   

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    1 Key Laboratory of Global Change and Marine-Atmospheric Chemistry, TIO, SOA, Xiamen 361005, China;
    2 Opening Laboratory of Marine Acoustics and Remote Sensing Technology, TIO, SOA, Xiamen 361005, China
  • Received:2013-05-30 Revised:2013-08-08 Online:2014-06-30 Published:2014-06-30
  • Supported by:

    The Project Sponsored by the Scientific Research Foundationof Third Institute of Oceanography,SOA

摘要: 南大洋是大气CO2的重要汇区,而近几十年来这个汇出现了明显变化并成为了研究的热点。本文利用中国第26次南极考察期间雪龙船绕南极航行所获得的现场碳及相关参数观测数据,分析推导出海水pCO2及其主控因子(叶绿素和水温)之间的经验关系,并结合相关卫星遥感数据建立遥感外推算法,计算南大洋50°S以南海区碳通量分布,评估该海区对大气CO2的吸收能力。计算结果表明,2009年11月从东经90°到西经90°(顺时针方向),南纬50°到75°海域为CO2输送大气的弱源,平均输入大气通量为9.482mol/m2*mon,碳释放量为0.0017795*1015gC;2009年12月从西经90°到东经90°(顺时针方向),南纬50°到75°海域为吸收大气CO2的弱汇,平均碳通量为-12.451mol/m2*mon,碳吸收量为0.026656*1015gC。将经验关系推导至该月份的50°S到75°S整个南大洋的计算中发现,2009年11月南大洋为大气CO2的源,碳释放量为0.0027896*1015gC;在2009年12月南大洋为大气CO2的汇,碳吸收量是-0.0035035*1015gC。相比之前我们所观测的结果,南大洋的碳汇吸收能力呈现明显下降。

关键词: 中国南极考察, 南大洋, 外推算法, 卫星遥感, 碳通量

Abstract: The Southern Ocean is an important sink of atmospheric CO2 and the magnitude of the CO2 sink is heavily disputed because its ability to absorb CO2 changes significantly in the decades. An empirical relationship was deduced based on the in-situ pCO2 in the surface sea water and its main controls including Chla and SST obtained during the 26th CHINARE. An extrapolation model was found combining the empirical relationship and relative remote sensing data to compute the air-sea carbon fluxes and carbon uptake in the Southern Ocean (south of 50°S). Results of the extrapolation model show that it was a weak source of atmospheric CO2 in the area from 90°E to 90°W (clockwise), 50°S to 75°S in November, 2009 with an average flux 9.482mol/m2*mon, and carbon release was 0.0017795*1015gC. While in December, 2009, the study area from 90°E to 90°W (clockwise), 50°S to 75°S turned to be a weak sink with an average flux -12.451mol/m2*mon and carbon uptake was 0.026656*1015gC. When the empirical relationship was applied to the whole area from 50°S to 75°S, the results show in November 2009 the Southern Ocean was a source of 0.0027896*1015gC and in December 2009 it was a sink of -0.0035035*1015gC. Compared to the research results before, we found that the ability of carbon uptake decline obviously.

Key words: CHINARE, Southern Ocean, extrapolation model, remote sensing, carbon flux