南黄海斜断面的水文状况及其微细结构     

蓝淑芳  顾传宬  傅秉照 《海洋科学集刊》1989,(30):33-50

1985年9月，中国科学院海洋研究所对斜贯南黄海的断面(图1)进行了现场观测。该断面呈东南－西北走向，起始测站B6位于济州岛西南，终点测站Hl2位于青岛外海，全长约329.5 km。断面东南端位于南黄海暖流水附近(蓝淑芳等，1986)，中部横截黄海冷水团，西北端位于青岛水团附近，因此对该断面的调查是很有意义的。 本文着重分析研究这一南黄海斜断面的水文状况以及温度和盐度的垂直微细结构。  相似文献   

Preliminary study on taxonomy of dinoflagellate cysts from major estuary and bays of Fujian Province, China     

Dongzhao Lan  Chao Li  Qi Fang  Haifeng Gu 《海洋学报(英文版)》2003,22(3):395-406

According to the morphology, wall structure, color, ornamentation, etc. , 25 speciesbelonging to 9 genera are identified and described from 144 sediment samples of the Xiamen Harbor, the mouth of the Minjiang River and the Sansha Bay. Among them there are 2 toxic species: Alexandrium minutun, A. tamarenes, 4 harmful species: Alexandrium affine, Lingulodinium polyedrum , Scrippsiella trochoide, Gonyaulax spinifera. It shows that 11 species of dinoflagellate cysts (Alexandrium affine, A. minutum , Diplopelta cf. parva , Polykrikos cf. schwartzii, protoceratium reticulatum ,Protoperidinium minutum ,P. cf. minutum,P. cf americanum and Alexandrium sp. , Protoperidinium sp. 1, P . sp. 2) are first recorded along the coast of Fujian Province, China. These newly discovered species might be transported to the coastal sea of Fujian Province by ballast water of international trade vessels.  相似文献   

泥螺室内人工育苗技术的初步研究     

王一农  顾小英  尤仲杰  黄来亚  杨茂朝 《海洋科学集刊》1997,(39):33-44

本文提出了泥螺室内人工育苗各阶段的技术措施,并就如何提高卵群的孵化率、几种药物在育苗中的应用作了扼要讨论。 在人工育苗过程中,0.28-0.9(×10-6)高锰酸钾,或5-9(×10-6)福尔马林处理卵群，可明显提高孵化率,对卵群膜的溶解有促进作用,并可提高卵群孵化的同步性。在面盘幼虫浮游期及匍匐期的培养过程中,采用0.5-1(×10-6)的高锰酸钾或5-10(×10-6)福尔马林可以有效地减少育苗水池中的有害微小生物。  相似文献   

珠江三角洲区域稳定性的地质环境分析   总被引：4，自引：0，他引：4  

钟建强  詹文欢 《海洋地质与第四纪地质》1996,16(2):33-42

本文讨论了珠江三角洲的内动力型、内外动力结合型和外动力型三类不稳定地质因素，认为其区域稳定性主要为中等稳定（次稳定）地区。其中，东江断块、番禺、五桂山、珠海三个断隆和新会断陷是区域稳定性较好的地区，灯笼沙断陷、伶仃洋断块和万顷沙断陷是区域稳定性较差的地区，万山群岛断块是区内稳定程度最低的地区。  相似文献   

泥沙捕集器在长江口航槽区域放投放和观测     

顾伟浩  关许为 《台湾海峡》1994,13(1):79-84

本文报道了５套泥沙捕集器在１９８７年８月１３－１７日和１９９０年２月２２－２６日期间在长江口北槽航区域现场投放和观测，集沙杯由有机玻璃制成，内径为５ｃｍ，杯高２１ｃｍ。对在小风情形，小风转大风情形和寒潮大风情形下集沙杯捕获沙样的干重和沙样的中值粒径垂直分布的特征分别作了描述，阱而为大风浪引起航槽游积及其底沙粗化提供了确凿证据。  相似文献   

Bacterial kinetics and environmental capacity in he Western Xiamen Harbour     

Ye Dezan  Ni Chunzhi  Zhou Zongcheng  Yao Ruimei  Zeng Huoshui  Lin Yanshun  Liang Ziyuan  Gu Jingyu 《海洋学报(英文版)》1995,14(2):247-259

ＢａｃｔｅｒｉａｌｋｉｎｅｔｉｃｓａｎｄｅｎｖｉｒｏｎｍｅｎｔａｌｃａｐａｃｉｔｙｉｎｈｅＷｅｓｔｅｒｎＸｉａｍｅｎＨａｒｂｏｕｒ￥ＹｅＤｅｚａｎ；ＮｉＣｈｕｎｚｈｉ；ＺｈｏｕＺｏｎｇｃｈｅｎｇ；ＹａｏＲｕｉｍｅｉ；ＺｅｎｇＨｕｏｓｈｕｉ；ＬｉｎＹａ...  相似文献   

1961~2010年中国农业洪旱灾害时空特征、成因及影响     

顾西辉  张强  张生 《地理科学》2016,36(3):439-447

搜集并分析了全国29个省份（不包括港、澳、台地区）1961~2010年农业洪旱灾害数据,深入探讨了中国洪旱灾害时空变异规律及其对粮食产量的影响。研究结果表明：中国大部分省份农业洪涝、干旱灾害具有明显的突变和趋势特征。中国中部、中西部及西北部洪涝灾害呈显著上升趋势;西北、东北地区及云南等地区干旱灾害呈显著上升趋势。除华北和东北地区外,洪涝灾害对农业的威胁日益严峻,而干旱灾害则无显著变化。这对中国粮食安全形成了重大挑战,尤其是西部以及北部地区粮食灾损率和灾损量显著上升。降水时空分布发生变化以及人类活动共同影响了中国农业洪涝、干旱时空变化特征。  相似文献   

Transmission electron microscopic study of the fine-grained vein matrix in the Suizhou L6 meteorite     

Xie Xiande  Wang Jianbo  Gu Xiangping  Xiong Yi  Jia Shuangfeng 《中国地球化学学报》2016,35(2):105-110

The mineralogy of shock vein matrix in the Suizhou meteorite has been investigated by optical and transmission electron microscopy. It was revealed that the vein matrix is composed of majorite-pyrope garnet, magnesiowüstite, and ringwoodite, with FeNi–FeS intergrowths. The observation and character of ring-like selected electron diffraction (SAED) patterns indicate that the idiomorphic garnet crystals in the vein matrix have different orientations. The polycrystalline nature of magnesiowüstite is also confirmed by a ring-like SAED pattern. Both garnet and magnesiowüstite crystals showed sharp diffraction spots, signifying the good crystallinity of these two minerals. The SAED pattern of cryptocrystalline ringwoodite shows only diffuse concentric diffraction rings. FeNi metal and troilite (FeS), which were molten during the shock event, occur in the matrix as fine eutectic FeNi–FeS intergrowths filling the interstices between garnet and magnesiowüstite grains. Based on the phase diagram of the Allende chondrite and the results of this TEM study, it is inferred that majorite-pyrope garnet first crystallized from the Suizhou chondritic melt at 22–26 GPa, followed by crystallization of magnesiowüstite at 20–24 GPa, and then ringwoodite at 18–20 GPa. The eutectic intergrowths of FeNi-metal and troilite are proposed to have crystallized during meteorite cooling and solidified at the last stage of vein formation.  相似文献   

Molecular structure parameters and thermal stabilities of benzocarbazoles     

CHEN Chuanping  LIU Jianping  GU Xu  and ZHOU Sumin School of Life Science  Chemical Engineering  Huaiyin Institute of Technology  Huai’an  China School of Chemistry  Huazhong Normal University  Wuhan  China 《中国地球化学学报》2008,27(2):135-139

The distance between 4-H and adjacent H on the substitutional benzene ring in benzo[c]carbazole was calculated in terms of molecular structure parameters. The result showed that the distance is shorter than the sum of van der Vaals＇ radii of two hydrogen atoms. This means that there is a steric hinderance between them. This effect will make the bond angle stretch and the bond length extend, or cause the molecule to distort, thus making benzo[c]carbazoles become unstable in thermodynamics. On the contrary there is no such effect for benzo[a]carbazoles. This conclusion has been confirmed by the result of calculation of the distance between the same two atoms with software GaussView. So the skeleton of benzo[c]carbazoles in sediments may be breached or isomerized with increasing maturity. It is consistent with the decrease of the ratio of benzo[c]carbazole to benzo[a]carbazole in hydrocarbon migration, suggesting that [c]/[a] not only changes with the distance of migration, but also may be influenced by maturity.  相似文献   

INVESTIGATIoN AND ANALYSIS FOR ACCIDENTS OF FOUNDATIoN PIT AT THE SURRoUNDING TAIHU LAKE     

Jiang Chenguang  Song Yanping  Zhu Yexin  Jiang Ke  He Yueping  Gu Chizhen 《化工矿产地质》2008,30(4)

  相似文献