Quantifying the Atmospheric CO2 Forcing Effect on Surface Ocean pCO2 in the North Pacific Subtropical Gyre in the Past Two Decades
Quantifying the Atmospheric CO2 Forcing Effect on Surface Ocean pCO2 in the North Pacific Subtropical Gyre in the Past Two Decades
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量化过去二十年大气 CO2 强迫对北太平洋副热带环流表层海洋 pCO2 的影响
DOI：
10.3389/fmars.2021.636881
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发表时间：
2021-03
影响因子：
3.7
通讯作者：
Fei Chai
中科院分区：
文献类型：
--
作者：
Shuangling Chen;Adrienne J. Sutton;Chuanmin Hu;Fei Chai
尽管在理解人为释放大气二氧化碳(其分压称为pCO2sw)对表层海水pCO2(PCO2sw)的长期影响方面具有公认的重要性，但由于pCO2sw与pCO2sw(PCO2swnat_Forced)的自然变异性以及对长时间序列数据记录的要求相结合，一直很难量化大气CO2强迫(PCO2sawm_FORCED)所驱动的pCO2sw的趋势或变化率。在这里，使用一个新的基于卫星的pCO2sw模式，输入2002至2019年的海洋颜色和其他辅助数据，我们解决了北太平洋副热带环流夏威夷海洋时间序列站的系泊站面临的这一挑战。具体地说，利用发展的pCO2sw模式，我们区分并分别量化了pCO2swnat_FORCED和pCO2swatm_FORCED的年际-年代际变化趋势。在2002年至2019年期间，pCO2sw和pCO2air的增长率分别为1.7%±0.1atm/年和2.2%±0.1atm年-1，增幅显著。μ年增长率分别为1.70±0.1atm/年和2.2%±0.1atm/年。相应地，pCO2swnat_FORCED的变化率主要受太平洋年代际涛动等大尺度强迫的驱动，2013年前后的变化率分别为负值(-0.5±0.2μatm yr-1)和正值(0.6±0.3μatm-1)。PCO_2swatm_FORCED比模拟的pCO_2sw年增长率小，为1.4±0.1atmyr-1，随大气pCO_2的变化呈现不同的时间间隔变化。PCO_2swatm_FORCED和pCO_2swnat_FORCED脱钩趋势的发现突出了区分两者的必要性，以便更好地理解海洋对人为二氧化碳的长期吸收以及人类活动对不断变化的表层海洋碳化学的影响。
Despite the well-recognized importance in understanding the long term impact of anthropogenic release of atmospheric CO2 (its partial pressure named as pCO2air) on surface seawater pCO2 (pCO2sw), it has been difficult to quantify the trends or changing rates of pCO2sw driven by increasing atmospheric CO2 forcing (pCO2swatm_forced) due to its combination with the natural variability of pCO2sw (pCO2swnat_forced) and the requirement of long time series data records. Here, using a novel satellite-based pCO2sw model with inputs of ocean color and other ancillary data between 2002 and 2019, we address this challenge for a mooring station at the Hawaii Ocean Time-series Station in the North Pacific subtropical gyre. Specifically, using the developed pCO2sw model, we differentiated and separately quantified the interannual-decadal trends of pCO2swnat_forced and pCO2swatm_forced. Between 2002 and 2019, both pCO2sw and pCO2air show significant increases at rates of 1.7 ± 0.1 μatm yr–1 and 2.2 ± 0.1 μatm yr–1, respectively. Correspondingly, the changing rate in pCO2swnat_forced is mainly driven by large scale forcing such as Pacific Decadal Oscillation, with a negative rate (-0.5 ± 0.2 μatm yr–1) and a positive rate (0.6 ± 0.3 μatm yr–1) before and after 2013. The pCO2swatm_forced shows a smaller increasing rate of 1.4 ± 0.1 μatm yr–1 than that of the modeled pCO2sw, varying in different time intervals in response to the variations in atmospheric pCO2. The findings of decoupled trends in pCO2swatm_forced and pCO2swnat_forced highlight the necessity to differentiate the two toward a better understanding of the long term oceanic absorption of anthropogenic CO2 and the anthropogenic impact on the changing surface ocean carbonic chemistry.
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影响因子：
5.2
作者：
S. Lohrenz;W. Cai
通讯作者：
S. Lohrenz;W. Cai
DOI：
--
发表时间：
2019
期刊：
Proceedings of the National Academy of Sciences
影响因子：
--
作者：
P. Landschützer
通讯作者：
P. Landschützer
影响因子：
5.2
作者：
V. V. S. S. Sarma-V.-V.-S.-S.-Sarma-2263831254;T. Saino;K. Sasaoka;Y. Nojiri;T. Ono;Masao Ishii;H. Inoue;Kazuhiko Matsumoto
通讯作者：
V. V. S. S. Sarma-V.-V.-S.-S.-Sarma-2263831254;T. Saino;K. Sasaoka;Y. Nojiri;T. Ono;Masao Ishii;H. Inoue;Kazuhiko Matsumoto
影响因子：
3.7
作者：
G. Terlouw;Lucie A. C. M. Knor;E. H. De Carlo;P. Drupp;F. Mackenzie;Y. Li;A. Sutton;A. Plueddemann;C. Sabine
通讯作者：
G. Terlouw;Lucie A. C. M. Knor;E. H. De Carlo;P. Drupp;F. Mackenzie;Y. Li;A. Sutton;A. Plueddemann;C. Sabine
影响因子：
5.2
作者：
S. Yasunaka;Y. Nojiri;S. Nakaoka;T. Ono;H. Mukai;N. Usui
通讯作者：
S. Yasunaka;Y. Nojiri;S. Nakaoka;T. Ono;H. Mukai;N. Usui