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基于卫星遥感的南海海-气CO2通量研究

蔡大鑫 刘少军 佟金鹤 赵婷

蔡大鑫, 刘少军, 佟金鹤, 赵婷. 基于卫星遥感的南海海-气CO2通量研究[J]. 热带气象学报, 2023, 39(4): 462-473. doi: 10.16032/j.issn.1004-4965.2023.042
引用本文: 蔡大鑫, 刘少军, 佟金鹤, 赵婷. 基于卫星遥感的南海海-气CO2通量研究[J]. 热带气象学报, 2023, 39(4): 462-473. doi: 10.16032/j.issn.1004-4965.2023.042
CAI Daxin, LIU Shaojun, TONG Jinhe, ZHAO Ting. STUDY ON AIR-SEA CO2 FLUX IN THE SOUTH CHINA SEA BASED ON SATELLITE REMOTE SENSING[J]. Journal of Tropical Meteorology, 2023, 39(4): 462-473. doi: 10.16032/j.issn.1004-4965.2023.042
Citation: CAI Daxin, LIU Shaojun, TONG Jinhe, ZHAO Ting. STUDY ON AIR-SEA CO2 FLUX IN THE SOUTH CHINA SEA BASED ON SATELLITE REMOTE SENSING[J]. Journal of Tropical Meteorology, 2023, 39(4): 462-473. doi: 10.16032/j.issn.1004-4965.2023.042

基于卫星遥感的南海海-气CO2通量研究

doi: 10.16032/j.issn.1004-4965.2023.042
基金项目: 

海南省重点研发计划项目 ZDYF2021SHFZ062

中国气象局创新发展专项 CXFZ2022P016

海南省气象局科研项目 HNQXJS 202214

详细信息
    通讯作者:

    蔡大鑫,黑龙江省人,高级工程师,主要从事生态遥感、应用气象研究。E-mail: cdxxhyn@126.com

  • 中图分类号: P407

STUDY ON AIR-SEA CO2 FLUX IN THE SOUTH CHINA SEA BASED ON SATELLITE REMOTE SENSING

  • 摘要: 海洋是地表环境中最重要的碳库,准确估算CO2在海洋与大气之间的交换对于进一步阐明其变化过程机理具有重要意义。利用南海2011—2020年的海温、风速、海平面气压等多种遥感反演数据,基于海-气分压差算法,构建了海-气CO2通量遥感估算模型,并分析其时空变化特征。结果表明:(1) 遥感估算模型在整个南海海域具有较好的通用性,对比实测区域数据,估算结果的平均绝对误差和均方根误差分别为1.04和1.37 mmol/(m2·d);对于源汇区的识别准确率达到90.63%。(2) 南海总体表现为弱碳源,CO2通量的季节变化呈现出夏秋季高、冬春季低的特征,夏季和冬季分别为全年最高和最低。空间分布特征为南北部差异大。碳汇高值区始终位于北部,且冬季为强碳汇,而碳源高值区夏季出现在中南半岛东南部,秋季则转移到南海东北部。(3) 南海三种典型区(北部陆架陆坡、中部海盆、南部陆坡)的CO2通量随时间推移均呈现降低的趋势,且北部下降速度最快。2011—2020年,南海年均向大气净释放碳1.51×107 t,但其碳释放量呈降低趋势,降低速度为2.03×106 t/a,南海总体的“碳源”强度有所减弱。研究结果可为制定碳排放及碳交易政策提供科学参考。

     

  • 图  1  研究区位置

    图  2  南海SST与pCO2对数的线性拟合

    图  3  pCO2观测值与模拟值的线性拟合

    图  4  南海海-气CO2通量验证

    图  5  2011—2020年南海各季海-气CO2通量

    图  6  南海2011—2020年平均海-气CO2通量

    图  7  南海典型区2011—2020年海-气CO2通量变化趋势

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出版历程
  • 收稿日期:  2022-05-07
  • 修回日期:  2023-06-28
  • 网络出版日期:  2023-10-24
  • 刊出日期:  2023-08-20

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