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Observed trends of p CO 2 and air-sea CO2 fluxes in the North Atlantic Ocean

机译:观测到北大西洋的p CO 2和海气CO2通量趋势

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Observed partial pressure of carbon dioxide ( p CO2) and temperature data in surface and mixed layer seawater of the Northeast (49oN, 16.5oW) and Northwest (56.5oN, 52.6oW) Atlantic Ocean time series sites have been analyzed for seasonal variability and air-sea CO2 fluxes. The NE PAP data showed an annual mean p CO2 of 335.9 ± 89.6 m atm (2003), 286.7 ± 103.5 m atm (2004), and 335.9 ± 89.6 m atm (2005). The annual data for NW KI deployments indicated annual p CO2 average of 336.6 ± 14.3 and 359.1 ± 25.3 m atm for 2004 and 2005 respectively. The oceanic p CO2distribution across the spatial gradients over a seasonal timescale is relatively homogeneous with marked seasonal variability. These data indicated consistently the undersaturation of oceanic surface water at the sites and thus a perennial carbon sink. Sea surface p CO2 trend is marked by summertime minimum and wintertime maximum, while depicting anti-phase patterns with the observed temperature signals. Seasonal to annual CO2 fluxes indicated a year-round CO2 invasion of the NE and NW basins. Estimated net basin-scale CO2 uptake fluxes of 2.96 ± 1.73 and 1.84 ± 1.3 mol m-2 CO2 a-1 were obtained for NE PAP (2nd - 4th) and NW K1 deployments, respectively.
机译:观测到的东北表层和混合层海水中二氧化碳分压(p CO 2 )和温度数据(49 o N,16.5 o W)和西北地区(56.5 o N,52.6 o W)大西洋时间序列站点,分析了季节变化和气海CO 2 助焊剂。 NE PAP数据显示,年平均p CO 2 为335.9±89.6 m atm(2003年),286.7±103.5 m atm(2004年)和335.9±89.6 m atm(2005年)。 NW KI部署的年度数据表明2004年和2005年的年p CO 2 平均值分别为336.6±14.3和359.1±25.3 m atm。整个季节尺度上海洋p CO 2 在空间梯度上的分布相对均匀,具有明显的季节变化性。这些数据一致地表明,这些地点的海洋地表水饱和度不足,因此常年存在碳汇。海面p CO 2 趋势以夏季的最小和冬季的最大为特征,同时用观测到的温度信号描绘了反相模式。从季节性到年度CO 2 通量表明东北地区和西北部盆地全年都有CO 2 入侵。估计的净盆地尺度CO 2 净吸收通量为2.96±1.73和1.84±1.3 mol m -2 CO 2 a -1 分别是针对NE PAP(第二至第四)和NW K1部署而获得的。

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