Assimilating satellite SST/SSH and in-situ T/S profiles with the Localized Weighted Ensemble Kalman Filter

The Localized Weighted Ensemble Kalman Filter(LWEnKF) is a new nonlinear/non-Gaussian data assimilation(DA) method that can effectively alleviate the filter degradation problem faced by particle filtering, and it has great prospects for applications in geophysical models. In terms of operational applications, along-track sea surface height(AT-SSH), swath sea surface temperature(S-SST) and in-situ temperature and salinity(T/S) profiles are assimilated using the LWEnKF in the northern South China ...     

Bias correction of sea surface temperature retrospective fore-casts in the South China Sea

Offline bias correction of numerical marine forecast products is an effective post-processing means to improve forecast accuracy. Two offline bias correction methods for sea surface temperature(SST) forecasts have been developed in this study: a backpropagation neural network(BPNN) algorithm, and a hybrid algorithm of empirical orthogonal function(EOF) analysis and BPNN(named EOF-BPNN). The performances of these two methods are validated using bias correction experiments implemented in the South...     

20世纪夏威夷最大海啸的地质证据

夏威夷历史海啸记录包含远距离和当地产生的海啸,由这些事件引起的人员伤亡和对建筑、环境造成的破坏与损失是惊人的,但是在近来才有一些对历史海啸沉积事件的综合性的研究.夏威夷多岩石的海岸线的演变主要是海啸和风暴的贡献,然而区分风暴和海啸是很难的,特别是相关的小的历史海啸事件.因此夏威夷海啸的研究往往关注于大的古海啸沉积事件.研究表明远距离产生的事件,如1946年阿留申海啸对瓦胡岛岩石岸线的演变具有重要影响.活火山也有助于岩石岸线的形成,且容易引发当地海啸.现代活动的Kilauea火山南侧海域的逐步沉降并没有引起太平洋范围内的破坏性的大海啸,但引发了局部一系列重要的海啸事件,这些事件的周期被估计认为是200年.     

Validation and application of soil moisture active passive sea surface salinity observation over the Changjiang River Estuary

Using sea surface salinity(SSS)observation from the soil moisture active passive(SMAP)mission,we analyzed the spatial distribution and seasonal variation of SSS around Changjiang River(Yangtze River)Estuary for the period of September 2015 to August 2018.First,we found that the SSS from SMAP is more accurate than soil moisture and ocean salinity(SMOS)mission observation when comparing with the in situ observations.Then,the SSS signature of the Changjiang River freshwater was analyzed using SMAP data and the river discharge data from the Datong hydrological station.The results show that the SSS around the Changjiang River Estuary is significantly lower than that of the open ocean,and shows significant seasonal variation.The minimum value of SSS appears in July and maximum SSS in December.The root mean square difference of daily SSS between SMAP observation and in situ observation is around 3 in both summer and winter,which is much lower than the annual range of SSS variation.In summer,the diffusion direction of the Changjiang River freshwater depicted by SSS from SMAP is consistent with the path of freshwater from in situ observation,suggesting that SMAP observation may be used in coastal seas in monitoring the diffusion and advection of freshwater discharge.     

团结奋进再创辉煌——中国海洋卫星事业发展20年回顾

我国是管理海域辽阔,海岸线漫长,资源丰富的海洋大国。大力发展海洋事业,事关国家的长治久安和经济社会的可持续发展。加强对海洋的观测和了解,准确预报海洋灾害,合理开发利用海洋资源,努力保护海洋生态环境,有效维护国家海洋主权与权益,是广大海洋工作者和海洋管理部门的神圣使命和战略任务。国家海洋局从建局以来,就一直积极发展海洋科学技术,着力强化海洋观测系统建设,不断提高对海洋的持久观测能力,为海洋事业实现跨越式发展提供了强有力的支撑。     

海洋湖沼通报征稿启事

一、本刊为海洋与湖沼科学的综合性学术刊物。内容包括:1.海洋与湖沼科学研究的论文、调查及实验报告;2.海洋与湖沼科学的综合评述、重要书刊和论文的评介;3.国内外海洋与湖沼科学的先进经验及学术动态。二、投稿须知1.来稿的图、表及说明要清楚、准确,置于文中相应位置。论文要求文字、语法符合汉语规范,标点使用要恰当。电子稿书写请按宋体5号字、1.5倍行距。文中使用照片的,请寄冲     

国际海岸清洁日 斑海豹协会在行动

2011年9月17日是国际海岸清洁日。由辽宁省盘锦市保护斑海豹志愿者协会发起,盘锦市180多名环保志愿者来到辽河入海口的斑海豹栖息地三道沟和六道沟海岸,捡拾海边不可降解的白色垃圾。这是盘锦市第一次组织和参与国际海岸清洁日活动。这次活动早在8月就在盘锦市保护斑海豹志愿者协会论坛上发帖通知,并在《辽河晚报》发布了征召志愿者的公告。协会会员和广大志愿者积极报名参加,上至70多岁的老人,下至7、8岁的孩童,有的是一家三口自驾车参加活动。17日是个周末,     

科技短消息

腰围增大,大脑萎缩?与相对较瘦的老年人相比,肥胖老年人的大脑认知区域较小,这使得他们的大脑年龄至少比实际年龄老了16岁。从前有研究表明,中年肥胖会增大日后患老年痴呆的风险,而老年痴呆通常伴随着大脑萎缩。美国加州大学的科学家们选择了94     

Analysis of cultivable aerobic bacterial community composition and screening for facultative sulfate-reducing bacteria in marine corrosive steel

Anaerobic, aerobic, and facultative bacteria are all present in corrosive environments. However, as previous studies to address corrosion in the marine environment have largely focused on anaerobic bacteria, limited attention has been paid to the composition and function of aerobic and facultative bacteria in this process. For analysis in this study, ten samples were collected from rust layers on steel plates that had been immersed in seawater for diff erent periods (i.e., six months and eight years) at Sanya and Xiamen, China. The cultivable aerobic bacterial community structure as well as the number of sulfate-reducing bacteria (SRB) were analyzed in both cases, while the proportion of facultative SRB among the isolated aerobic bacteria in each sample was also evaluated using a novel approach. Bacterial abundance results show that the proportions are related to sea location and immersion time;abundances of culturable aerobic bacteria (CAB) and SRB from Sanya were greater in most corrosion samples than those from Xiamen, and abundances of both bacterial groups were greater in samples immersed for six months than for eight years. A total of 213 isolates were obtained from all samples in terms of CAB community composition, and a phylogenetic analysis revealed that the taxa comprised four phyla and 31 genera. Bacterial species composition is related to marine location;the results show that Firmicutes and Proteobacteria were the dominant phyla, accounting for 98.13% of the total, while Bacillus and Vibrio were the dominant genera, accounting for 53.06% of the total. An additional sixfacultative SRB strains were also screened from the isolates obtained and were found to encompass the genus Vibrio (four strains), Staphylococcus (one strain), and Photobacterium (one strain). It is noteworthy that mentions of Photobacterium species have so far been absent from the literature, both in terms of its membership of the SRB group and its relationship to corrosion.     

国土资源部海洋油气资源与环境地质重点实验室

国土资源部海洋油气资源与环境地质重点实验室成立于2007年，依托单位为青岛海洋地质研究所，该研究所是中国地质调查局直属的海洋地质事业单位，承担国家基础性、公益性的海洋地质调查研究和战略性的矿产资源调查研究工作，主要任务是开展近海及海岸带地质与矿产资源调查以及海洋地质实验和科学研究。现任学术委员会主任秦蕴珊院士，实验室主任周永青研究员。     

海洋微生物资源的开发与应用研究

海洋微生物作为海洋中一种重要的生物资源,越来越受到人们的重视,在活性物质开发,环境污染治理方面都具有巨大的应用前景。文章重点综述了海洋微生物中细菌、放线菌、真菌和微藻在抗病、抗肿瘤、保健和环境治理等方面的现状及发展趋势。对进一步加强海洋资源利用,推进"科技兴海"战略实施,充分挖掘海洋微生物资源蕴藏的巨大潜力具有十分重要的意义。     

我国现行海域资源与土地资源配置方式的比较研究

为提高海域资源市场化配置的效率,文章对比分析我国海域与土地使用权权属及其取得方式的异同。研究结果表明：海域使用权与国有土地使用权的取得方式不同,海域申请审批与国有建设用地审查报批流程的不同之处主要在于审查层级和须提交的研究专题不同;海域与国有建设用地“招拍挂”出让流程的不同之处主要表现在与年度使用计划的衔接、出让方案的审批权限、对前期专题的要求以及资源收储状况方面。     

广西的红树林资源及其可持续利用

简述了广西红树林的生境条件和群落类型。从植物、浮游生物、底栖硅藻、大型底栖动物、游泳鱼类、昆虫、鸟类等方面,对红树林区的生物类群进行了统计和论述。同时对红树林资源的特点,合理开发和可持续利用进行了初步探讨。     

广东放流增殖鱼虾资源

广东各地海洋与渔业部门针对沿海海域以及珠江等各江河渔业资源退化情况,积极组织人工增殖放流活动,仅今年6月8日这一次,全省就将2亿多尾鱼虾苗投进了深圳、惠州、东莞、江门等地沿海水域。 据介绍,为使广东海域及江河渔业资源得到增殖和发展,从1980年开始,广东各地海洋与渔     

大连市海洋资源与功能区划

为了科学合理的开发利用海洋资源，控制和引导海域使用方向，保护海洋环境，促进海洋资源和区域经济持续发展，为海洋综合管理提供服务，在全面调查大连市海域自然环境、自然资源、开发现状及存在问题和综合分析区域经济发展需求的基础上，确定了大连市海域及其毗邻陆域海洋功能区，并对贯彻实施海洋功能区提出了相关措施和建议。     

加拿大天然气水合物的分布和资源量估算

在麦肯齐三角洲—波弗特海、北极群岛、加拿大所属的大西洋边缘 ,地球物理测井已解释出多处水合物分布区。在麦肯齐三角洲从钻井中采集到了天然气水合物样品 ( Mallik2 L-3 8井 ) ( Collett et al.,1 999,等 )。大多数甲烷水合物岩心的存在范围从 2 0 0 m到最大稳定深度 ,其中最大稳定深度可从区域压力和温度条件推断出。天然气水合物的最大稳定深度在麦肯齐三角洲—波弗特海为 1 4 0 0 m,在北极群岛为1 80 0 m( Majorowicz and Judge,1 991 ,等 )。在加拿大所属的大西洋边缘 ,特别是拉布拉多陆架和纽芬兰岛东北 Grand Banks,测井数据显…