为解决离岸海洋工程设计所需的海底泥温参数获取困难及精度不高等问题,运用一维热传导方程和耿贝尔极值I型分布方法,分析了中国科学院大气物理研究所(The Institute of Atmospheric Physics,IAP)发布的IAP全球水温场资料,探讨了任意指...为解决离岸海洋工程设计所需的海底泥温参数获取困难及精度不高等问题,运用一维热传导方程和耿贝尔极值I型分布方法,分析了中国科学院大气物理研究所(The Institute of Atmospheric Physics,IAP)发布的IAP全球水温场资料,探讨了任意指定海区海底面以下不同深度不同重现期的泥温极值推算方法。将逐月推算结果与渤海某站历史实测资料进行相应对比,在秋冬季差值为0.16～1.04℃,春夏季差值为0.96～2.47℃;将1～100a不同重现期的泥温极值推算结果与辽东湾某油田区块的实测值回归统计分析结果进行对比,当正态分布函数<0.2时,其分组差值数为-0.45～1.55℃。应用此方法推算海底泥温设计参数,不受资料实测限制,可应用于全球绝大部分海区。展开更多
The carbon isotopic composition of organic matter from lake sediments has been extensively used to infer variations in productivity. In this paper, based on the study of the contents and δ13C values of organic matter...The carbon isotopic composition of organic matter from lake sediments has been extensively used to infer variations in productivity. In this paper, based on the study of the contents and δ13C values of organic matter in different types of lakes, it has been found that δ13C values of organic matter have different responses to lake productivity in different lakes. As to the lakes dominated by aqutic macrophytes such as Lake Caohai, organic matter becomes enriched in 13C with increasing productivity. As to the lakes dominated by aquatic algae such as Lake Chenghai, δ13C values of organic matter decrease with increasing productivity, and the degradation of aquatic algae is the main factor leading to the decrease of δ13C values of organic matter with increasing productivity. Therefore, we should be cautious to use the carbon isotopic composition of organic matter to deduce lake productivity.展开更多
文摘为解决离岸海洋工程设计所需的海底泥温参数获取困难及精度不高等问题,运用一维热传导方程和耿贝尔极值I型分布方法,分析了中国科学院大气物理研究所(The Institute of Atmospheric Physics,IAP)发布的IAP全球水温场资料,探讨了任意指定海区海底面以下不同深度不同重现期的泥温极值推算方法。将逐月推算结果与渤海某站历史实测资料进行相应对比,在秋冬季差值为0.16～1.04℃,春夏季差值为0.96～2.47℃;将1～100a不同重现期的泥温极值推算结果与辽东湾某油田区块的实测值回归统计分析结果进行对比,当正态分布函数<0.2时,其分组差值数为-0.45～1.55℃。应用此方法推算海底泥温设计参数,不受资料实测限制,可应用于全球绝大部分海区。
基金supported by the National Basic Research Program of China (Grant No. 2006CB403201)the National Natural Science Foundation of China (Grant No. 40673068)
文摘The carbon isotopic composition of organic matter from lake sediments has been extensively used to infer variations in productivity. In this paper, based on the study of the contents and δ13C values of organic matter in different types of lakes, it has been found that δ13C values of organic matter have different responses to lake productivity in different lakes. As to the lakes dominated by aqutic macrophytes such as Lake Caohai, organic matter becomes enriched in 13C with increasing productivity. As to the lakes dominated by aquatic algae such as Lake Chenghai, δ13C values of organic matter decrease with increasing productivity, and the degradation of aquatic algae is the main factor leading to the decrease of δ13C values of organic matter with increasing productivity. Therefore, we should be cautious to use the carbon isotopic composition of organic matter to deduce lake productivity.
