Evaluation of the net CO<sub>2</sub> uptake in the Canada Basin in the summer of 2008

SUN Heng; GAO Zhongyong; LU Peng; XIU Peng; CHEN Liqi

doi:10.1007/s13131-017-1028-9

2008年夏季加拿大海盆净二氧化碳吸收量评估

doi: 10.1007/s13131-017-1028-9

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, 厦门, 361005
2.
海岸和近海工程国家重点实验室, 大连理工大学水利工程学院, 大连, 116024
3.
热带海洋环境国家重点实验室, 中国科学院南海海洋研究所, 广州, 510301

基金项目: The National Natural Science Foundation of China (NSFC) under contract Nos 41476173 and 41406221; the Chinese Projects for Investigations and Assessments of the Arctic and AntArctic under contract Nos CHINARE2012-04-04 and 2012-04-03; the Fujian Science and Technology Innovation Leader Project 2016; the Scientific Research Foundation of Third Institute of Oceanography, SOA under contract No. 2014006.

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- 收稿日期: 2016-07-31

Evaluation of the net CO₂ uptake in the Canada Basin in the summer of 2008

1.
Key Laboratory of Global Change and Marine Atmospheric Chemistry of State Oceanic Administration, Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China
2.
State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China
3.
State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China

摘要

摘要: 第三次中国北极考察队（CHINARE）于2008年夏季进行。在调查中，测量了加拿大海盆表层海水的二氧化碳分压（pCO₂），并采集二氧化碳海水样品进行测量。研究确定了加拿大海盆pCO₂的分布情况，对影响因素进行了分析，并对加拿大海盆的海洋二氧化碳通量进行了评估。加拿大海盆分为3个区域：无冰区（77°N以南），海冰部分覆盖区（77°N-80°N）和海冰严重覆盖区（80°N以北）。在无冰区，pCO₂较高（320至368μatm），主要是由于在短时间内与大气CO₂快速平衡。在海冰部分覆盖区，由于海冰边缘水华和冰融水稀释，表层pCO₂相对较低（250至270μatm）。在海冰严重覆盖区，由于生物对二氧化碳的清除，低pCO₂水向北运输和海冰覆盖的阻碍，海水pCO₂在270和300μatm之间变化。调查期间，加拿大海盆表层海水pCO₂是不饱和的，是大气CO₂的净汇。无冰区，海冰部分覆盖区和海冰严重覆盖区的夏季净CO₂吸收量分别为4.14±1.08 Tg C/a，1.79±0.19 Tg C/a和0.57±0.03 Tg C/a （1 Tg=10¹²g）。总体而言，2008年夏季加拿大海盆净CO₂吸收量为6.5±1.3 Tg C/a，占北冰洋二氧化碳吸收量的4-10%。
- 加拿大海盆 /
- 净CO₂吸收量 /
- CO₂分压
Abstract: The third Chinese National Arctic Research Expedition (CHINARE) was conducted in the summer of 2008. During the survey, the surface seawater partial pressure of CO₂ (pCO₂) was measured, and sea water samples were collected for CO₂ measurement in the Canada Basin. The distribution of pCO₂ in the Canada Basin was determined, the influencing factors were addressed, and the air-sea CO₂ flux in the Canada Basin was evaluated. The Canada Basin was divided into three regions:the ice-free zone (south of 77°N), the partially ice-covered zone (77°-80°N), and the heavily ice-covered zone (north of 80°N). In the ice-free zone, pCO₂ was high (320 to 368 μatm, 1 μatm=0.101 325 Pa), primarily due to rapid equilibration with atmospheric CO₂ over a short time. In the partially ice-covered zone, the surface pCO₂ was relatively low (250 to 270 μatm) due to ice-edge blooms and ice-melt water dilution. In the heavily ice-covered zone, the seawater pCO₂ varied between 270 and 300 μatm due to biological CO₂ removal, the transportation of low pCO₂ water northward, and heavy ice cover. The surface seawater pCO₂ during the survey was undersaturated with respect to the atmosphere in the Canada Basin, and it was a net sink for atmospheric CO₂. The summertime net CO₂ uptake of the ice-free zone, the partially ice-covered zone and the heavily ice-covered zone was (4.14±1.08), (1.79±0.19), and (0.57±0.03) Tg/a (calculated by carbon, 1 Tg=10¹² g), respectively. Overall, the net CO₂ sink of the Canada Basin in the summer of 2008 was (6.5±1.3) Tg/a, which accounted for 4%-10% of the Arctic Ocean CO₂ sink.
- Canada Basin /
- net CO₂ uptake /
- partial pressure of CO₂

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参考文献(45)

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2008年夏季加拿大海盆净二氧化碳吸收量评估

doi: 10.1007/s13131-017-1028-9

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Evaluation of the net CO2 uptake in the Canada Basin in the summer of 2008

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Evaluation of the net CO₂ uptake in the Canada Basin in the summer of 2008