A preliminary study of variations of the Changjiang Diluted Water between August of 1999 and 2006

A large area hypoxia has been already reported respectively by two interdisciplinary surveys off the Changjiang Estuary since summer of 1999 and 2006. The hypoxic zone shows distinct year-to-year variations. Observed oceanographic data are first analysized and reveal a big difference for the Changjiang Diluted Water (CDW) between these two periods. These great changes are related to the tremendous reduction of the freshwater discharge and variations of wind fields between these two years. It is also found that the monthly mean intrusion of Kuroshio and its branches has increased in the northern East China Sea (ECS), but decreased in the southern ECS in August of 2006 as compared with 1999 on the base of general circulation models. Then, the Regional Ocean Modelling Systems is applied to the East China Sea to evaluate the contributions and relative importance of impacts from the river discharge, wind forcing and open boundary data. Our simulations reproduce the phenomena that more fresh water extends northeastward in 2006 and forms a negative SSS anomaly to the northeast of the river mouth as compared with 1999, which is consistent with observations. The five group numerical tests suggest that the wind forcing dominates the CDW variations followed by the Kuroshio and its branches. The study implies important roles played by hydrodynamic processes on the variability of hypoxic zone in the study areas.     

东地中海对气候作用力的响应：来自最后两个间冰期高峰的认知

有关地中海海洋系统对气候效应的灵敏性这一问题仍处于争辩阶段。在这里,我们研究了在过去最后两个间冰期高峰期间东地中海海洋循环对日照效应的长期反应,在这期间大规模的水文变化导致了富含有机质的沉积物的沉积。     

胶州湾桩基式海上新城建筑

结合胶州湾的地理位置、地质地貌、沉积物、水动力、泥沙运动方面的区域背景及近年来淤积情况,分析海上新城的建筑方式,参考青岛海洋规划方案和经济技术能力,提出桩基式海上新城的构想。运用经验公式对桩基的冲刷深度和范围进行预测,讨论了桩基式海上新城构思对胶州湾淤积现状的改变和对青岛市发展的影响,认为青岛胶州湾建造桩基式海上新城是未来海洋利用和未来新兴城市的发展形式之一。     

油轮系泊墩式码头时撞击能量的概率分布研究

利用某煤油轮系泊墩式码头靠泊力整体模型试验的资料，分析油轮系泊码头时，在不规则波作用下总撞击能量的分布。计算表明，在不规则波作用下，无因次总撞击能量的概率分布符合ＰⅢ型分布曲线。     

中国科学院西太平洋“海山成因、演化及深部物质循环”创新交叉与合作研究团队讨论会在南京大学召开北大核心CSCD

2016年1月28-29日,由中国科学院海洋研究所海洋地质与环境重点实验室与南京大学内生金属矿床成矿机制研究国家重点实验室联合主办的第二届中国科学院＂海山成因、     

Wind impact on pollutant transport in a shallow estuary

A three-dimensional numerical model, EFDC （ environmental fluid dynamics code） is applied to the Pamlico River Estuary （PRE） in eastern North Carolina of the United States to examine the wind impact on pollutant age distributions and residence time. A series of model experiments representing base case, remote-wind-induced water level set-up and local winds cases are conducted. Model results indicate that the pollutant mean age and the system residence time are functions of gravitational circulation in the PRE. The system responses to remote-wind-induced water level set-up are different in different portions of the PRE. Under such condition, dissolved substances in the upstream portion of the PRE have a younger age and shorter residence time （compared with the base case） , by contrast, they have a older age and longer residence time in the downstream portion of the PRE. Upriver and downriver local winds appear to have opposite impacts on pollutant age distributions. The substances are retained much longer within the PRE under upriver wind than those under downriver wind. The model results also suggest that across - river winds may lead to longer residence time through enhanced turbulence mixing, which slows down the gravitational circulation in the PRE.     

巨型乌贼和毯子章鱼

乌贼胆子很小,它们稍纵即逝.为了拍摄到乌贼大规模聚集的壮观场面,你必须让它们感觉舒适和放松.科学家马克·诺曼和朱利安·芬教摄影师勒内·赫泽小心翼翼地从乌贼身旁退避而不是吓走它们.通过这种举动打消了它们的疑虑后,它们就自己游过来了,并配合地将自己展示在摄像机面前.     

基于紫外荧光法检测水中油含量的浸入式传感装置的研究

介绍了一种基于紫外荧光分析法的水中油类污染物的检测传感器的设计。重点介绍了该传感探头的检测部分和控制部分的设计,检测部分由紫外发光二极管和探测器等组成信号采集装置,控制部分通过采用运算放大器、滤波器以及模数转换器实现了对微弱信号的高精度放大和处理。紫外荧光分析法具有快速、非接触性检测、操作简单、绿色环保无污染等优点,结合单片机技术在工程上有广泛应用。     

深水半潜式平台锚链倾角监测的自容式传感器的设计

深水半潜式平台系泊锚链的倾角变化是评价平台系泊状态与锚链受力的重要指标,是半潜式平台重要的监测内容。目前,深水锚链的测量主要是采用自容式的传感器,针对其水下长时间测量的应用特点,要求它的设计必须具有低功耗、高可靠性、大存储量、体积小、防水耐压等指标。根据我国南海流花平台的锚链监测需要,设计与制作了专用的水下自容式倾角传感器,并在实际应用中进行了检验。     

不规则波作用下OWC沉箱气室捕能效果研究

沉箱防波堤兼作岸式波力发电装置是1种新型的港工建筑物,它是集合了防波堤与岸式振荡水柱波力发电装置的共性特点设计而成.本文主要是在物理模型的基础上,研究沉箱气室捕能效果.试验中主要采集了沉箱气室内的波高、气压以及输气管的空气流速等数据.