海洋学研究 ›› 2023, Vol. 41 ›› Issue (3): 14-21.DOI: 10.3969/j.issn.1001-909X.2023.03.002

• 研究论文 • 上一篇    下一篇

基于浮标观测的春季青岛近岸海水pCO2变化及海-气CO2通量研究

周学杭1(), 张洪海2, 马昕1,3, 陈朝晖1,3,*()   

  1. 1.中国海洋大学 物理海洋教育部重点实验室,山东 青岛 266100
    2.中国海洋大学 海洋化学理论与工程技术教育部重点实验室,山东 青岛 266100
    3.崂山实验室,山东 青岛 266237
  • 收稿日期:2023-01-19 修回日期:2023-03-22 出版日期:2023-09-15 发布日期:2023-10-24
  • 通讯作者: *陈朝晖(1984—),男,教授,主要从事海洋多尺度过程观测与机理的研究,E-mail:chenzhaohui@ouc.edu.cn
  • 作者简介:周学杭(1998—),男,山东省青岛市人,主要从事物理海洋学方面的研究,E-mail:zhouxuehang@stu.ouc.edu.cn
  • 基金资助:
    国家自然科学基金杰出青年基金项目(42225601);中央高校基本科研业务费专项项目(202172001);山东省“泰山学者”青年专家项目(tsqn201812022)

Variations of pCO2 and sea-air CO2 flux in Qingdao coastal seawater in spring based on buoy observations

ZHOU Xuehang1(), ZHANG Honghai2, MA Xin1,3, CHEN Zhaohui1,3,*()   

  1. 1. Key Laboratory of Physical Oceanography, MOE, Ocean University of China, Qingdao 266100, China
    2. Key Laboratory of Marine Chemistry Theory and Technology, MOE, Ocean University of China, Qingdao 266100, China
    3. Laoshan Laboratory, Qingdao 266237, China
  • Received:2023-01-19 Revised:2023-03-22 Online:2023-09-15 Published:2023-10-24

摘要:

利用海-气界面浮标观测得到的高频数据,分析了春季青岛近岸海域海表二氧化碳分压(pCO2)的变化规律及驱动因素,并对海-气CO2通量进行了估算。观测期间该海域由大气的碳汇转变为碳源,主要是由海表pCO2的不断增长所致。对海表pCO2控制因素进行分析,发现温度升高是pCO2增长的主要驱动因素,生物过程起到一定的抑制作用。海表pCO2呈现出日变化特征,温度和生物因素对海表pCO2日变化的作用均与太阳辐射相关,但两者的作用相反。此外,分析发现浮标的不同采样频率会对海-气CO2通量估算产生影响,缩短采样间隔能有效降低海-气CO2通量估算的偏差,提高估算的准确性。

关键词: 二氧化碳分压, 海-气CO2通量, 浮标观测, 青岛近岸海域

Abstract:

Based on the high frequency data of sea-air interface buoys, the variation pattern and driving factors of sea-air partial pressure of carbon dioxide (pCO2) were analyzed and the sea-air CO2 flux in the coastal waters of Qingdao in spring was estimated. During the observation period, the sea area changed from a carbon sink of atmospheric CO2 to a carbon source, which was mainly caused by the continuous increase of sea surface pCO2. By analyzing the controlling factors of pCO2, it was found that temperature was the main driving factor of pCO2 growth, and biological processes played a certain inhibiting role. The sea surface pCO2 showed a diurnal variation. The effects of temperature and biological factors on the diurnal variation of pCO2 were related to solar radiation, but they had opposite effects. In addition, the analysis showed that different sampling frequencies of buoys affected the estimation of sea-air CO2 flux and shortening the sampling interval could effectively reduce the deviation of CO2 flux estimation and improve the accuracy of estimation.

Key words: pCO2, sea-air flux of CO2, buoy observation, Qingdao coastal waters

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