Ventilation changes in the western North Pacific since the last glacial period
Ventilation changes in the western North Pacific since the last glacial period
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DOI：
10.5194/cp-8-17-2012
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发表时间：
2011-08
影响因子：
4.3
通讯作者：
Y. Okazaki;T. Sagawa;H. Asahi;K. Horikawa;Jonaotaro Onodera
中科院分区：
文献类型：
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作者：
Y. Okazaki;T. Sagawa;H. Asahi;K. Horikawa;Jonaotaro Onodera
通过对高沉积速率沉积物中浮游和底栖有孔虫壳的放射性碳测量，重建了过去25年中纬度北太平洋西部2100 m深度的深水通风记录。脆弱和坚固的浮游有孔虫壳的14c数据一致，保证了重建通气记录的高质量。放射性碳活动的变化与大气记录一致，表明在整个冰川期到冰川期，深海储层的旧碳没有发生大规模混合。
We reconstructed the ventilation record of deep water at 2100 m depth in the mid-latitude western North Pacific over the past 25 kyr from radiocarbon measurements of coexisting planktic and benthic foraminiferal shells in sediment with a high sedimentation rate. The 14 C data on fragile and robust planktic foraminiferal shells were concordant with each other, ensuring high quality of the reconstructed ventilation record. The radiocarbon activity changes were consistent with the atmospheric record, suggesting that no massive mixing of old carbon from the abyssal reservoir occurred throughout the glacial to deglacial periods.