Magma mixing in upper mantle: Evidence from high Mg~# olivine hosted melt inclusions in MORBs near East Pacific Rise 13°N

Early formed high-Mg# olivine phenocrysts during evolution of MORB magmas usually host melt inclusions, which record im-portant information about the early-stage evolution of magma.Five MORB samples from near East Pacific Rise (EPR) 13°N vary little in K/Ti (0.07?0.12), Tb/Lu (1.72?1.84) and Sm/Nd (0.310?0.332) and have similar REEs patterns, indicating that depleted upper mantle has similar mineral composition.Sixty-five initial melt inclusions derived by correcting olivine fractionation and FeO-Loss show ...     

江苏沿海滩涂地貌及资源开发利用途径

阐述了江苏沿海滩涂地貌特点以及滩涂资源开发利用现状,提出了江苏沿海滩涂资源开发利用模式和途径.根据连云港、盐城、南通各分区资源优势及存在问题,提出连云港应以港口开发和盐业—海洋化工为主,滨海旅游为特色,滩涂养殖为辅;盐城应以滩涂农业为主,自然保护区为特色,逐步开发港口和临港工业;南通应以港口资源开发和滩涂养殖以及水产品加工为主,大力开发海洋可再生能源.     

莺歌咀附近岸段的岸线演变模拟

对某码头不同布置方案的适宜性进行论证、比选,提出推荐方案。从泥沙冲淤角度以及工程对岸线的影响出发,运用岬间海湾平面平衡形态经验模型,模拟出码头施建三个方案后的海岸的平衡岸线;并用一线模型对岸线的演变进行预测。利用经验模型和数值模拟相结合的方法,得到工程后岸线的演变情况。结果表明三个方案导堤两侧的海岸均为淤积,并且方案一占优,从而为工程设计方案的比选提供了一定的科学依据。     

沿岸流的模型实验和数值模拟研究(英文)

研究了两个缓坡海岸（坡度为1：100和1：40）上沿岸流、波高及波浪增减水的模型实验方法和数值模拟方法,给出了沿岸流速度、波高和波浪增减水沿海岸剖面的分布,并且对沿岸流的实验模型方法进行了讨论。给出了沿岸流的数值模拟方法和结果,与实验结果进行了比较。     

Lag influences of winter circulation conditions in the tropical western Pacific on South Asian summer monsoon

<正>By means of monthly mean NCEP/NCAR data analyses, this note investigates the lag influences of winter circulation conditions in the tropical western Pacific on South Asian summer monsoon through the methods of composite, correlation and statistical confident test. The results indicate clearly that winter climate variations in the equatorial western Pacific would produce significant influences on the following South Asian summer monsoon, and with the lapse of time the lag influences show clearly moving northward and extending westward features. When winter positive (negative) sea level pressure anomalies occupy the equatorial western Pacific, there is an anticyclonic (cyclonic) circulation anomaly appearing in the northwestern Pacific. With the lapse of time, the anticyclonic (cyclonic) circulation anomaly gradually moves to northeast, and its axis in the west-east directions also stretches, therefore, easterly (westerly) anomalies in the south part of the anticyclonic (cyclonic) circulation anomaly continuously expand westward to the peninsula of India. Undoubtedly, the South Asian summer monsoon is weak (strong).     

Revision of the sesarmid crab genera Labuanium Serène and Soh, 1970, Scandarma Schubart,Liu and Cuesta, 2003 and Namlacium Serène and Soh, 1970 (Crustacea: Decapoda: Brachyura: Sesarmidae), with descriptions of four new genera and two new species

ABSTRACT

The systematics of the arboreal sesarmid crab genera Labuanium Serène and Soh, 1970 and Scandarma Schubart, Liu and Cuesta, 2003 is revised. Also included is the poorly known genus Namlacium Serène and Soh, 1970, which is morphologically similar to Labuanium and may also be arboreal in habit. The present study restricts Labuanium to its type species, L. politum (De Man, 1887), and congeners are transferred to Scandarma, Geosesarma De Man, 1892, and three new genera established herein: Circulium gen. nov., Shinobium gen. nov. and Mindanium gen. nov. Two new species of Scandarma are described from Papua New Guinea and Madagascar. Sesarma jacquinoti Ortmann, 1894, previously regarded as a synonym of Scandarma gracilipes (H. Milne Edwards, 1853) (comb. nov.), is here shown to be a junior synonym of Sesarmops angustifrons (A. Milne-Edwards, 1869). Labuanium schuetteii (Hess, 1865) is regarded as conspecific with Scandarma gracilipes (H. Milne Edwards, 1853) (comb. nov.) and the lectotype of the latter species (here designated) is also selected as the neotype of the former, making the two names objective synonyms. Material which had been identified as ‘Labuanium finni Alcock, 1900’ by Pretzmann (1984) from the South Andaman Islands is actually the poorly known Geosesarma thelxinoe (De Man, 1908), which is here referred to a new genus, Andamanium gen. nov. Sesarma finni Alcock, 1900 s.s. is herein assigned to Scandarma. Namlacium crepidatum (Calman, 1925), the only species in the genus, is redescribed and figured and compared with Labuanium and Scandarma. Keys to species of Circulium and Scandarma are provided.

http://www.zoobank.org/urn:lsid:zoobank.org:pub:414B8DAA-584F-4070-A355-83B583D0D017     

浙江沿岸养殖贝类有毒有害物质污染状况监测研究

2009-2010年对浙江沿岸三门湾、乐清湾和嵊泗海水贝类养殖区采样151批次,连续2年监测了贝类微生物、贝类毒素和重金属有毒有害物质的污染状况.结果表明浙江沿岸贝类产品尚存在一定风险,部分样品有贝类毒素检出或重金属含量超标现象,应引起贝类消费者和相关渔业管理部门的重视.     

大气对海温构型及转换过程的响应——副高进退及异常机理讨论

用动力学分析和数值计算的方法讨论了大气对热带太平洋几咎典型海温分布构型及其转换过程的热力强迫响应。结果表明：持续的海温热力强迫可以很快地激发出稳定的大气平稳态响应,Ｌａ Ｎｉｎａ（Ｅｌ Ｎｉｎｏ）期间的大气位势应分别利于夏季西太平洋副高增强（减弱）和位置偏北（偏南）。不同构型的海温转换及转换过程的快慢直接影响大气位势的响应形式,转换过程的异常可能将导致导致夏季西太平洋副高活动异常。     

江苏岸外潮流沙脊群形成的过程与机制

在总结前人研究成果的基础上,结合３９个钻孔的岩相分析及１５０００年以来东中国海潮流系统演变的数值模拟结果,对江苏岸外潮流沙脊群发育的动力条件、物质基础、形成时代及演变过程进行了探计讨。结果表明,江苏岸外潮流沙脊群发育的主要动力,是以Ｊｉａｎｇ港为波腹点（顶点）的辐合辐散的潮流系统。该潮流系统的形成,主要是由江苏海岸,尤其是山东半岛南岸岸线位置及轮廓决定的。潮流沙脊群开始发育的时间,比通常认为的要早     

北太平洋中纬度地区海气热输送的季节变化特征

资料分析表明,北太平洋中工地区海气热输送具有明显的季节变化特征,１２月最强,６月最弱,热输送的分布与海流密切有关。暖流区偏强,冷流区偏北。西边界下的两支海流热输送的季节变化比东边界上的两支海流更明显。