To determine the effects of mesoscale eddies on sea-air CO₂ flux, we investigated the surface fugacity of CO₂ (surface fCO₂) distribution in the northern Philippine Sea, where mesoscale eddies are common. Surface fCO₂ showed large spatial variations, such that values were high in the non-eddy and cyclonic eddy regions, while they were low within the anticyclonic eddy. The maximum fCO₂ was observed in the non-eddy region; higher fCO₂ values were observed in the area surrounding the cyclonic eddy than at the center of the cyclonic eddy. Within the cyclonic eddy, the contribution of dissolved inorganic carbon (DIC) enrichment because of upwelling was considerably offset by cooling. In the non-eddy region, the contribution of DIC enrichment from upwelling was rarely offset by cooling; thus, the maximum fCO₂ was observed in the non-eddy region. Surface fCO₂ showed a robust correlation with sea surface temperature (SST) within the cyclonic and anticyclonic eddies, but it did not display any correlation in the non-eddy region. Temperature was a major factor that controlled surface fCO₂ in the anticyclonic eddy, but this effect was absent in the cyclonic eddy. Temperature-normalized fCO₂ exhibited a clear negative relationship with SST in the cyclonic eddy and the non-eddy region, indicating that surface fCO₂ was considerably affected by the upwelling of high-fCO₂ deep water in both regions. Sea-air CO₂ fluxes ranged from 0.011 to 9.92 mmol m^-2 day^-1 and all values were positive, indicating that the entire study area acted as a CO₂ source during the research period. The estimated mean sea-air CO₂ fluxes in the cyclonic eddy, anticyclonic eddy, and non-eddy region were 1.10 ± 0.75, 0.64 ± 0.66, and 1.42 ± 1.12 mmol m^-2 day^-1, respectively. The sea-air CO₂ fluxes considerably varied according to eddy type; they were almost twofold higher in the cyclonic eddy than in the anticyclonic eddy. In the cyclonic eddy and non-eddy regions, upwelling caused surface fCO₂ to increase, thereby increasing sea-air CO₂ flux.

为了确定中尺度涡流对海气 CO _{2通量的影响，我们研究了 CO 2}的表面逸度（表面FCO ₂ ) 分布在菲律宾海北部，中尺度涡流很常见。表面FCO ₂表现出较大的空间变化，非涡区和气旋区的CO 2 值较高，而反气旋区的CO 2 值较低。最大值F在非涡流区观察到CO _{2 ；}更高FCO ₂值在气旋涡流周围区域比在气旋涡流中心区域观察到。在气旋涡流中，由于上升流引起的溶解无机碳（DIC）富集的贡献被冷却大大抵消了。在非涡流区，上升流对DIC富集的贡献很少被冷却抵消；因此，最大F在非涡流区域观察到CO _{2 。}表面FCO ₂在气旋和反气旋涡内与海面温度（SST）表现出强烈的相关性，但在非涡旋区域没有表现出任何相关性。温度是控制表面的主要因素FCO ₂在反气旋涡中，但在气旋涡中没有这种效应。温度归一化FCO ₂在气旋涡区和非涡区与海温呈明显的负相关关系，说明地表FCO ₂受到高F两个地区的CO ₂深水。海气CO ₂通量范围为0.011～9.92 mmol m ^-2 day ^-1 ，均为正值，表明整个研究区在研究期间均作为CO _2源。气旋涡流、反气旋涡流和非涡流区的估计平均海气 CO ₂通量分别为 1.10 ± 0.75、0.64 ± 0.66 和 1.42 ± 1.12 mmol m ^-2 day ^-1。海气CO ₂通量随涡流类型变化很大；它们在气旋涡流中几乎是反气旋涡流中的两倍。在气旋涡区和非涡区，上升流引起地表FCO ₂增加，从而增加海气CO ₂通量。