In-situ data from the summer cruise of 2010 in the west Taiwan Strait are used to study the spatial distribution of the Jiulongjiang River plume （JRP）. The results show that in the 2 m layer, the JRP debouches into ...In-situ data from the summer cruise of 2010 in the west Taiwan Strait are used to study the spatial distribution of the Jiulongjiang River plume （JRP）. The results show that in the 2 m layer, the JRP debouches into the west Taiwan Strait in the form of jets, with one branch through the Xiamen Bay （Xiamen JR_P） and another through the channel between Jinmen and Weitou （JinWei JRP）. Driven by the summer southwesterly monsoon, the upwelling-related Dongshan low temperature and high salinity water flows northeastward in the form of a jet as well. To a certain degree, the Dongshan low temperature and high salinity jet restricts the Xiamen JRP from spreading further offshore and drags the JinWei JRP northeastward at the same time. Meanwhile, a terrestrial dissolved organic matter （DOM） distribution model on the basis of molecular collision theory in thermodynamics and statistical physics is applied to analyze the Moderate Resolution Imaging Spectroradiometer （MODIS） turbidity data. The correlation coefficient of the theoretical model to the MODIS turbidity data reaches 0.96 （significant at a 95% level of confidence）. The result clarifies the dynamic mechanism for the turbidity distribution characteristics. It is the salinity in macro-scale that plays a decisive role in the turbidity variability in the coastal water. This suggests that the satellite-derived turbidity data can be used as an indicator to show the spreading patterns of the JRP. Based on the turbidity data from 2003 to 2011, we conclude that there are four main spreading patterns of the JRP.展开更多
根据福建九龙江河口ZKl孔及ZK7孔沉积物AMS （Accelerator Mass Spectrometry，加速器质谱测年技术）14C测年、古地磁和剖面特征分析，进行该地区的第四纪地层划分，依据粒度特征，结合磁化率、微体古生物和Sr／Ba等环境代用指标进行沉...根据福建九龙江河口ZKl孔及ZK7孔沉积物AMS （Accelerator Mass Spectrometry，加速器质谱测年技术）14C测年、古地磁和剖面特征分析，进行该地区的第四纪地层划分，依据粒度特征，结合磁化率、微体古生物和Sr／Ba等环境代用指标进行沉积相分析，重建了该区晚第四纪的古环境演变历史。结果表明：（1）九龙江河口第四纪沉积时代为晚更新世中期至全新世晚期。（2）上更新统沉积可划分为下部龙海组洪冲积相和上部东山组河漫滩相沉积，中间有10ka的沉积间断，末次冰期又再遭受风化剥蚀作用，推测有5—6ka的风化剥蚀期。（3）全新统最早沉积年代约为14kaBP，依次出现河口湾相、河口砂坝一分汊河道相、潮滩相沉积。（4）根据年代学数据和沉积相变化，重塑了该区晚第四纪沉积环境变化过程，为该区的第四纪研究和工程地质工作提供了参考依据。展开更多
基金This work was jointly supported by the National Basic Research Program of China （No. 2009CB21208） and the National Natural Science Foundation of China （Grant Nos. 41276006, 41121091 and 40810069004）. The authors would like to express their appreciation to the crew ofR/V Yanping 2 and all of the cruise participants for help with the field work. We thank Ms. Yonghong Li for providing the MODIS satellite data, Mr. Zhenyu Sun and Ms. Jia Zhu for their insightful suggestions. Zheng also appreciates the financial support by a Key Program from the State Administration of Foreign Experts Affairs of China. We are grateful to two anonymous reviewers for their valuable suggestions and comments for improving the manuscript.
文摘In-situ data from the summer cruise of 2010 in the west Taiwan Strait are used to study the spatial distribution of the Jiulongjiang River plume （JRP）. The results show that in the 2 m layer, the JRP debouches into the west Taiwan Strait in the form of jets, with one branch through the Xiamen Bay （Xiamen JR_P） and another through the channel between Jinmen and Weitou （JinWei JRP）. Driven by the summer southwesterly monsoon, the upwelling-related Dongshan low temperature and high salinity water flows northeastward in the form of a jet as well. To a certain degree, the Dongshan low temperature and high salinity jet restricts the Xiamen JRP from spreading further offshore and drags the JinWei JRP northeastward at the same time. Meanwhile, a terrestrial dissolved organic matter （DOM） distribution model on the basis of molecular collision theory in thermodynamics and statistical physics is applied to analyze the Moderate Resolution Imaging Spectroradiometer （MODIS） turbidity data. The correlation coefficient of the theoretical model to the MODIS turbidity data reaches 0.96 （significant at a 95% level of confidence）. The result clarifies the dynamic mechanism for the turbidity distribution characteristics. It is the salinity in macro-scale that plays a decisive role in the turbidity variability in the coastal water. This suggests that the satellite-derived turbidity data can be used as an indicator to show the spreading patterns of the JRP. Based on the turbidity data from 2003 to 2011, we conclude that there are four main spreading patterns of the JRP.
文摘根据福建九龙江河口ZKl孔及ZK7孔沉积物AMS （Accelerator Mass Spectrometry，加速器质谱测年技术）14C测年、古地磁和剖面特征分析，进行该地区的第四纪地层划分，依据粒度特征，结合磁化率、微体古生物和Sr／Ba等环境代用指标进行沉积相分析，重建了该区晚第四纪的古环境演变历史。结果表明：（1）九龙江河口第四纪沉积时代为晚更新世中期至全新世晚期。（2）上更新统沉积可划分为下部龙海组洪冲积相和上部东山组河漫滩相沉积，中间有10ka的沉积间断，末次冰期又再遭受风化剥蚀作用，推测有5—6ka的风化剥蚀期。（3）全新统最早沉积年代约为14kaBP，依次出现河口湾相、河口砂坝一分汊河道相、潮滩相沉积。（4）根据年代学数据和沉积相变化，重塑了该区晚第四纪沉积环境变化过程，为该区的第四纪研究和工程地质工作提供了参考依据。
