Marine 14 C Reservoir Age and Suess Effect in the Indian Ocean
Marine 14 C Reservoir Age and Suess Effect in the Indian Ocean
复制标题
印度洋海洋 14 C 储层年龄及其影响
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
Sachivalaya Marg
中科院分区：
文献类型：
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作者：
K. Dutta;Sachivalaya Marg
从表层海水溶解的无机碳中获取碳的海洋生物样品的表观放射性碳 ( 14 C) 年龄平均比当代陆地木材或全球大气二氧化碳早 400 年。这种年龄偏移是由于深海旧碳的混合造成的，被称为海洋 14 C 储库效应。海洋环流模式的区域和时间变化导致海洋 14 C 储层年龄以及生物表面海洋样本的显着空间和时间变化。了解储层年龄对于准确校准古海洋学研究中经常使用的海洋沉积物中的生物碳酸盐和沉积物有机质的 14 C 年龄非常重要。这里讨论了海洋 14 C 储层年龄的概念及其量化，并回顾了印度洋地区的数据。分析了印度洋和南海海洋 14 C 储库年龄的区域变化和化石燃料 Suess 效应。
Apparent radiocarbon ( 14 C) ages of marine biogenic samples that derive their carbon from surface seawater dissolved inorganic carbon are on the average about 400 years older than contemporary terrestrial woods or global atmospheric CO2. This age offset is due to mixing of old carbon from the deep ocean and is referred to marine 14 C reservoir effect. Both regional and temporal variations of ocean circulation pattern causes significant spatial and temporal variations in marine 14 C reservoir ages and hence of biogenic surface marine samples. Knowledge of reservoir age is very important to accurately calibrate 14 C-ages of biogenic carbonates and sediment organic matter from marine sediments that are frequently used in paleoceanographic studies. Here the concept of marine 14 C reservoir ages and their quantification are discussed and data for the Indian Ocean region are reviewed. Regional variations of marine 14 C reservoir ages and fossil fuel Suess effect for the Indian Ocean and the South China Sea are analyzed.