活珊瑚骨骼中的水镁石微银星石:浅海背景中极端微环境的指示物

海洋骨骼生物（如石珊瑚目）被越来越多地用作古今气候的指示物。石珊瑚的微量元素分析已被用于海水的古测温学研究（如Mitsuguchi等,1996;Marshall和McCulloch,2002）以及海岸径流（如Alibert等,2003）、污染（如Fallon等,2002）和海洋上升流（Lea等,1989）的调查,然而,骨骼碳酸盐作为海水替代物的程度要取决于它们反映周围海洋化学的情况如何。     

Heinrich事件期间的混合层增深：多种浮游有孔虫的δ^18O研究

北大西洋晚更新世Heinrich事件（HEs）以Laurentide冰盖的冰筏碎屑（IRD）层为标志。有8个这样的事件与约65000a以来格陵兰冰心记录的部分Dansgaard-Oeschger（D／O）事件的最冷亚冰期相对应。判断一个D／O事件的开始,根据这样一个典型特征：在仅仅几十年的时间内温度突然上升了9～15℃,其后便是数千年时间的气温逐渐变冷。     

中新生代期间较快的海底扩张和岩石圈增生

地球构造板块的运动代表着地幔的表面对流现象,在50~100 Ma以来控制着各种地质作用过程(包括地幔热损耗、海平面变化、碳循环和海水化学等)。虽然研究结果推断出了新生代和部分中生代的板块运动历史,但是对这一时期洋中脊扩张及岩石圈增生的全球速率变化仍存有争议。构造重建结果表明新生代时期板块速度呈增加状态(尤其在太平洋地区)(Cogné和Humler,2004),然而对洋中脊扩张(Kominz,1984)或俯冲(Engebretson等,1992)速率的全球性研究却表明新生代时期洋中脊处的岩石圈增生速率呈放慢状态。Rowley(2002)使用现代洋底的面积—年代分布数值…     

南极冰河下面的快速侵蚀、鼓丘形成和水文变化

极地冰盖的变化在未来几百年期间可能会极大地影响着全球海平面和地势低洼的海岸带地区,因此,人们投入了大量的人力、物力来进行冰川学研究,但是,我们尚缺乏将冰盖变化与未来海平面评价有机结合在一起的能力。对地球的冰盖演化进行预测需要正确的冰动力模式和对过去的冰川环境做出适当的解释,而这种模式和解释最需要的是要了解冰川地层的作用过程,但是,目前我们非常缺乏现代冰川之下和冰川底界的信息数据。     

南海北部表层水温变化的幅度和时期:与东亚季风的动态联系

热带和亚热带季风区经历着地球上最大的年内风向逆转,随之而来的是迁移区内的强烈降雨。季风体系从温暖的赤道海洋向高纬度的内陆输送热量和水汽（如Emile-Geay等,2003）。在过去的150ka年间,季风和降雨变化显著,日照量和北半球冰盖面积也随之逐渐变化。这些变化影响了热带太平洋西部边缘盆地的淡水平衡（如Wang等,1999;Oppo等,2003;Rosenthal等,2003）,但是该时期季风对热带太平洋西部边缘盆地海水表层温度（SST）的影响仍然不为人所熟知。我们在此提供南海（西部热带太平洋的一个边缘海）北部过去145ka以来SST变化的第一手资料。     

波令-阿勒罗德间冰期时期西南印度夏季季风降雨的变化性

北方春季时期印度次大陆和西藏高原的差异性增热吸引了印度洋的潮湿空气穿越印度大陆,产生了世界上最显著的西南印度夏季季风(ISM)体系(Webster,1987)。世界上大约25%的人口受到这种季节降雨的影响。20世纪60年代末期,印度约150万人死于连续3年的季风失常(重大灾害数据库,2005)     

Monitoring of organic contaminants in sediments from the Korean coast: Spatial distribution and temporal trends (2001-2007)

Spatial and temporal trends of organic contaminants in sediments along the Korean coast were estimated through a nationwide environmental monitoring program from 2001 to 2007. The concentrations of organic contaminants in sediments along the Korean coast were relatively low or moderate compared with foreign studies. The mean detection frequencies of organic contaminants during the seven years were highest for PAHs and PCDD/Fs, followed by PCBs, DDTs, TBT and HCHs in decreasing order. Based on published sediment quality guidelines, the ecological risks of persistent organic pollutants in sediments along the Korean coast were low, despite exceedances of the ERL at 2-6 sites for DDTs, and the TEL at 9-18 sites for PCDD/Fs. Nonparametric tests to assess temporal trends revealed significant decreasing trends for PCBs and PCDD/Fs at four and three sites, respectively (p < 0.05). These results reflect the effects of regulations on the use of those contaminants.     

Polybrominated diphenyl ethers (PBDEs) in marine sediments from industrialized bays of Korea

Concentrations of polybrominated diphenyl ethers (PBDEs) were determined in coastal sediments from heavily industrialized areas and major harbors in Korea. SummationPBDE(20) concentrations in sediments ranged from 2.03 to 2253ng/g dry weight. PBDE concentrations were higher at estuarine and inner bay locations close to industrial complexes and large harbors, indicating that the PBDE contamination in the sediments is due to local discharges from industrial complexes. Deca-BDE was the predominant congener and the concentrations were comparable to or higher than those reported from other countries. Non-parametric multidimensional scaling (MDS) ordination showed that deca-BDE technical mixture is the main source of PBDE contamination in Korean coastal waters, with minor contamination by octa-BDE product. This result is consistent with the consumption pattern of brominated flame-retardants (BFRs) in Korea. Significant correlations existed among BDEs 28, 47, 99, 100, 153, and 154; however, BDEs 183 and 209 showed little correlation with less highly brominated congeners.     

晚麦斯特里希特期—早丹麦期高分辨率海洋~(87)Sr/~(86)Sr记录:白垩纪—第三纪之交事件的意义

晚麦斯特里希特期—早丹麦期高分辨率海洋８７Ｓｒ／８６Ｓｒ记录：白垩纪—第三纪之交事件的意义Ｈ．Ｂ．Ｖｏｎｈｏｆ等Ｋ—Ｔ交界短期８７Ｓｒ／８６Ｓｒ正异常是Ｈｅｓｓ等（１９８６）首次从Ｋ—Ｔ过渡期基准曲线中辨别出的，此后几次调查对此进行进一步探索，得出的...