Ion concentrations in ice wedges: an innovative approach to reconstruct past climate variability
Ion concentrations in ice wedges: an innovative approach to reconstruct past climate variability
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冰楔中的离子浓度：重建过去气候变化的创新方法
DOI：
10.1016/j.epsl.2019.03.013
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发表时间：
2019
影响因子：
5.3
通讯作者：
Hiroshi Ohno
中科院分区：
文献类型：
--
作者：
Yoshinori Iizuka;Chihiro Miyamoto;Sumito Matoba;Go Iwahana;Kazuho Horiuchi;Yoshio Takahashi;Naoya Kanna;Koji Suzuki;Hiroshi Ohno
对于大气气体和气溶胶，雪和冰提供了一个有用的古环境历史档案。在北半球，这个档案主要局限于格陵兰岛的冰，但最近利用阿拉斯加北部巴罗的一个冰楔的年代学，已经完成了有希望的开创性工作。在这里，我们调查了同一冰楔采样点过去的气溶胶，重建了博林/阿勒德(BA)和年轻仙女木(YD)期间邻近波弗特海的海冰波动。我们确认了BIWS中甲烷磺酸盐离子(MS−)浓度作为海洋替代物的完整性，然后发现冰楔在YD开始(最冷)期间有较高的MS−浓度。较高的MS−浓度表明，即使在最冷的YD时期(12,900-12,700 YrBP)，巴罗附近阿拉斯加波弗特海的近岸地区可能也没有完全被永久海冰填满。
For atmospheric gases and aerosols, snow and ice provide a useful archive of paleoenvironmental history. In the northern hemisphere, this archive has been largely limited to Greenland ice, but promising pioneering work has been done recently using chronology of an ice wedge in Barrow, northern Alaska. Here, we investigate past aerosols at the same ice-wedge sampling site, reconstructing the sea-ice fluctuations in the adjacent Beaufort Sea during the Bølling/Allerød (BA) and Younger Dryas (YD) periods. We confirm the integrity of methanesulfonate ion (MS−) concentrations in the BIWS as marine proxies, and then find that the ice wedge has a high MS−concentration through the beginning (coldest) YD periods. The high MS−concentration indicates that even during the coldest YD periods (12,900–12,700 yrBP), the near-shore region in the Alaskan Beaufort Sea near Barrow may not have been completely filled by permanent sea ice.