海洋环流模式模拟自然 和核辐射14C的分布

放射性14C在海洋环流研究和人为CO2问题的研究中都有重要地位。本文用海洋环流模式模拟了海洋中自然14C的分布及海洋对核辐射产生的放射性14C的吸收， 以期对海洋吸收人为CO2的能力做一初步的研究。模拟的海洋环流结果与观测相比符合得较好，成功地模拟出了北大西洋深水（NADW）、南极底水 (AABW）等基本特征。对自然14C的模拟揭示出了海洋通风的基本特征。模拟出的沿GEOSECS 路径的南、北垂直截面与观测结果符合得较好。对核辐射14C的模拟表明:模式模拟的沿GEOSECS 路径的南、北垂直截面与观测结果符合得较好；模拟出的海洋表面核辐射浓度与观测值一致，但核辐射14C在海洋中的柱存量和平均穿透深度都比观测结果要小。文中分析了造成这种差异的可能原因。

A Simulation of Nature and Bomb Radiocarbon in Global Ocean General Circulation Models

This paper presents the results of numerical simulations of the radiocarbon distribution in the ocean using a modified version of the Geophysical Fluid Dynamics Laboratory modular ocean model (MOM2). The model reproduces the North Atlantic Deep Water (NADW) and the Antarctic Bottom Water (AABW). The simulations of nature radiocarbon reveal the property of deep ocean ventilation. The model successfully reproduces the observed GEOSECS (Geochemical Ocean Sections Study) sections in the Pacific and the Atlantic. The model successfully reproduces the mid-depth 14 C minimum observed in the North Pacific. In the Atlantic, the model's deep 14 C distribution is much too strongly layered with relatively old water in deep ocean. The simulations of bomb radiocarbon show that the model successfully reproduces the observed GEOSECS bomb 14 C surface concentrations, but the model's inventory and penetration depths are lower than the observational values.