Akhoudas Camille Hayatte, Ulfsbo Adam, Thornton Brett F, Pohlman John W, Boze Lee-Gray, Jakobsson Martin, Stranne Christian
Department of Geological Sciences, Stockholm University, Stockholm, Sweden.
Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden.
Sci Rep. 2025 Aug 11;15(1):29341. doi: 10.1038/s41598-025-12720-1.
We investigated the relative contributions of various factors that influence seasonal changes in sea surface partial pressure of ( , calculated from the measured pH and total alkalinity) in four regions of northwestern Greenland: Nares Strait, Lincoln Sea, Sherard Osborn and Petermann fjords. Using the temperature minimum layer as a proxy for winter conditions, we examined dynamics from the onset of sea-ice melt to summer. Our findings revealed significant spatial variability in , driven by differences in temperature, freshwater inputs, and biological activity. In particular, in Sherard Osborn Fjord substantial freshwater inputs and strong stratification were found to enhance accumulation, while in Petermann Fjord biological uptake was the main driver. This study, conducted in summer 2019, underscores the critical role of northwest Greenland's coastal waters as a summer sink. It highlights the complex interplay of physical and biogeochemical processes in modulating , suggesting significant regional differences in dynamics between two neighboring fjords.
我们研究了影响格陵兰岛西北部四个区域（内尔斯海峡、林肯海、谢拉德·奥斯本峡湾和彼得曼峡湾）海表 分压（由测量的pH值和总碱度计算得出）季节性变化的各种因素的相对贡献。以温度最低层作为冬季条件的代表，我们研究了从海冰融化开始到夏季的 动态变化。我们的研究结果表明，受温度、淡水输入和生物活动差异的驱动， 存在显著的空间变异性。特别是，在谢拉德·奥斯本峡湾，大量的淡水输入和强烈的分层作用增强了 的积累，而在彼得曼峡湾，生物对 的吸收是主要驱动因素。这项于2019年夏季进行的研究强调了格陵兰岛西北部沿海水域作为夏季 汇的关键作用。它突出了物理和生物地球化学过程在调节 方面的复杂相互作用，表明两个相邻峡湾之间在 动态变化上存在显著的区域差异。
