Decadal Dynamics of the CO2 System and Associated Ocean Acidification in Coastal Ecosystems of the North East Atlantic Ocean
Decadal Dynamics of the CO2 System and Associated Ocean Acidification in Coastal Ecosystems of the North East Atlantic Ocean
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东北大西洋沿海生态系统二氧化碳系统和相关海洋酸化的十年动态
DOI：
10.3389/fmars.2021.688008
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发表时间：
2021
期刊：
影响因子：
4.9
通讯作者：
Y. Bozec
中科院分区：
文献类型：
--
作者：
Jean;P. Marrec;T. Cariou;Emilie Grosstefan;E. Mace;Peggy Rimmelin;M. Vernet;Y. Bozec
从2008年到2020年，在位于东北大西洋的西英吉利海峡南部（sWEC）（SOMLIT码头和SOMLIT近海）和布雷斯特湾（SOMLIT布雷斯特）的三个沿海生态系统中，收集了每周和每两个月一次的碳酸盐系统参数和辅助数据。季节性和年际CO2分压（pCO 2）和溶解无机碳（DIC）变化的主要驱动因素是生态系统净生产力（NEP）和热力学。观测站之间存在差异，近岸生态系统中的pCO 2和DIC受到底栖和浮游生物群落的驱动，具有较高的生物影响。河流输入对DIC动态的影响在SOMLIT布雷斯特（7%）比SOMLIT码头（3%）和SOMLIT近海（<1%）更明显。这三个生态系统作为弱源的CO2到大气中的0.18 ± 0.10，0.11 ± 0.12和0.39 ± 0.08 mol m-2年-1，分别。年际间，海气CO2通量（FCO 2）的变化是低SOMLIT离岸和SOMLIT码头，而SOMLIT布雷斯特偶尔切换到弱的大气CO2年汇，增强春季NEP驱动相比，每年的平均值。在2008-2018年期间，每月总碱度（TA）和DIC异常的特征是显著的正趋势（p值< 0.001），TA从0.49 ± 0.20到2.21 ± 0.39 μmol kg-1年-1，DIC从1.93 ± 0.28到2.98 ± 0.39 μmol kg-1年-1。这些趋势与计算的海水pCO 2显著增加（范围为+2.95 ± 1.04至3.52 ± 0.47 μatm年-1）和计算的原位pH值大幅降低（原位pH值平均降低0.0028年-1）相关。这种海洋酸化（OA）是由大气CO2强迫（57-66%），海表温度（SST）增加（31-37%）和盐度变化（2-5%）驱动的。额外的pH原位数据将这些观察到的趋势延长到2008-2020年期间，并表明OA加速，反映在该期间sWEC的平均pH原位下降0.0046年-1。1998-2020年期间的进一步观测表明，气候指标北大西洋涛动（NAO）和大西洋年代际变率（AMV）与SST趋势有关，1998-2010年期间变冷，2010-2020年期间变暖，这可能影响了我们沿海站的OA趋势。这些结果表明，大的时间变化的OA在沿海生态系统的sWEC，并强调有必要保持高分辨率和长期观测的碳酸盐参数在沿海生态系统。
Weekly and bi-monthly carbonate system parameters and ancillary data were collected from 2008 to 2020 in three coastal ecosystems of the southern Western English Channel (sWEC) (SOMLIT-pier and SOMLIT-offshore) and Bay of Brest (SOMLIT-Brest) located in the North East Atlantic Ocean. The main drivers of seasonal and interannual partial pressure of CO2 (pCO2) and dissolved inorganic carbon (DIC) variabilities were the net ecosystem production (NEP) and thermodynamics. Differences were observed between stations, with a higher biological influence on pCO2 and DIC in the near-shore ecosystems, driven by both benthic and pelagic communities. The impact of riverine inputs on DIC dynamics was more pronounced at SOMLIT-Brest (7%) than at SOMLIT-pier (3%) and SOMLIT-offshore (<1%). These three ecosystems acted as a weak source of CO2 to the atmosphere of 0.18 ± 0.10, 0.11 ± 0.12, and 0.39 ± 0.08 mol m–2 year–1, respectively. Interannually, air-sea CO2 fluxes (FCO2) variability was low at SOMLIT-offshore and SOMLIT-pier, whereas SOMLIT-Brest occasionally switched to weak annual sinks of atmospheric CO2, driven by enhanced spring NEP compared to annual means. Over the 2008–2018 period, monthly total alkalinity (TA) and DIC anomalies were characterized by significant positive trends (p-values < 0.001), from 0.49 ± 0.20 to 2.21 ± 0.39 μmol kg−1 year−1 for TA, and from 1.93 ± 0.28 to 2.98 ± 0.39 μmol kg–1 year–1 for DIC. These trends were associated with significant increases of calculated seawater pCO2, ranging from +2.95 ± 1.04 to 3.52 ± 0.47 μatm year–1, and strong reductions of calculated pHin situ, with a mean pHin situ decrease of 0.0028 year–1. This ocean acidification (OA) was driven by atmospheric CO2 forcing (57–66%), Sea surface temperature (SST) increase (31–37%), and changes in salinity (2–5%). Additional pHin situ data extended these observed trends to the 2008–2020 period and indicated an acceleration of OA, reflected by a mean pHin situ decrease of 0.0046 year–1 in the sWEC for that period. Further observations over the 1998–2020 period revealed that the climatic indices North Atlantic Oscillation (NAO) and Atlantic Multidecadal Variability (AMV) were linked to trends of SST, with cooling during 1998–2010 and warming during 2010–2020, which might have impacted OA trends at our coastal stations. These results suggested large temporal variability of OA in coastal ecosystems of the sWEC and underlined the necessity to maintain high-resolution and long-term observations of carbonate parameters in coastal ecosystems.
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影响因子：
2.3
作者：
Kitidis, Vassilis;Hardman-Mountford, Nicholas J.;Smyth, Timothy J.
通讯作者：
Smyth, Timothy J.
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影响因子：
18.3
作者：
Osborne, Emily B.;Thunell, Robert C.;Gruber, Nicolas;Feely, Richard A.;Benitez-Nelson, Claudia R.
通讯作者：
Benitez-Nelson, Claudia R.
影响因子：
4.6
作者：
Chan F;Barth JA;Blanchette CA;Byrne RH;Chavez F;Cheriton O;Feely RA;Friederich G;Gaylord B;Gouhier T;Hacker S;Hill T;Hofmann G;McManus MA;Menge BA;Nielsen KJ;Russell A;Sanford E;Sevadjian J;Washburn L
通讯作者：
Washburn L
影响因子：
3.7
作者：
D. Turk;Hongjie Wang;Xinping Hu;D. Gledhill;Zhaohui Aleck Wang;Li‐Qing Jiang;W. Cai
通讯作者：
D. Turk;Hongjie Wang;Xinping Hu;D. Gledhill;Zhaohui Aleck Wang;Li‐Qing Jiang;W. Cai
影响因子：
5.2
作者：
R. Najjar;M. Herrmann;R. Alexander;E. Boyer;D. Burdige;D. Butman;W. Cai;E. Canuel;Robert F. Chen;M. Friedrichs;R. Feagin;P. Griffith;A. Hinson;J. Holmquist;Xinping Hu;W. Kemp;K. Kroeger;A. Mannino;S. L. McCallister;W. McGillis;M. Mulholland;C. Pilskaln;J. Salisbury;S. Signorini;P. St‐Laurent;H. Tian;M. Tzortziou;P. Vlahos;Zhaohui Aleck Wang;R. Zimmerman
通讯作者：
R. Najjar;M. Herrmann;R. Alexander;E. Boyer;D. Burdige;D. Butman;W. Cai;E. Canuel;Robert F. Chen;M. Friedrichs;R. Feagin;P. Griffith;A. Hinson;J. Holmquist;Xinping Hu;W. Kemp;K. Kroeger;A. Mannino;S. L. McCallister;W. McGillis;M. Mulholland;C. Pilskaln;J. Salisbury;S. Signorini;P. St‐Laurent;H. Tian;M. Tzortziou;P. Vlahos;Zhaohui Aleck Wang;R. Zimmerman