Seasonal to decadal changes of surface fCO_2 are assessed along the track between Kerguelen and Amsterdam islands. Data from 17 oceanographic cruises are used, from 1991 to 2011 and two distinct regions are examined, separated by the Subantarctic Front (SAF). The region south of the SAF displays a strong summer phytoplankton bloom of up to -28 mmol C m~(-2)d~(-1) within a calm area, constrained by physics and topography. This region is a 6-fold more important annual sink than that deduced from Takahashi climatology, highlighting the importance of key-areas separate examination before proceeding to spatial integration. Our data reveal a decadal decline of the summer CO_2 sink in the Southern part of the SAF, due to both warming and less Fe input to surface waters from reduced water mixing.
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机译：沿着Kerguelen和阿姆斯特丹群岛之间的轨道评估了表面FCO_2的季节性变化。使用来自1991年至2011年的17个海洋巡航的数据，检查了两个不同的区域，由小提治局前进（SAF）分开。 SAF以南的地区在平静的区域内显示出高达-28mmol C m〜（-2）d〜（-1）的强大夏季浮游植物，受到物理和地形的限制。该地区的年度下沉比从Takahashi气候学推导出6倍，突出了关键区域的重要性在进行空间集成之前。我们的数据揭示了Saf南部夏季Co_2水槽的夏季Co_2沉降的二等衰落，这是由于降温和减少水混合的表面水。
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