珠江口盆地白云凹陷陆坡区10.5 Ma以来的沉积体系   总被引：1，自引：0，他引：1  

武强  解习农  邱燕  刘明玲 《海洋地质与第四纪地质》2008,28(2):1-6

通过对珠江口盆地白云凹陷陆坡区10.5Ma以来的地震相分析,共识别出席状平行亚平行地震相、透镜状前积地震相、深切河谷地震相、帚状地震相和杂乱地震相,不同的地震相分别代表不同的沉积体系类型。综合所识别的地震相类型,分析了陆架边缘下切谷、浊积扇和陆架边缘三角洲3种主要的沉积体系及其配置关系。物源供给是影响陆坡区沉积体系发育的最重要因素,是沉积体系发育的物质基础,海平面变化和构造运动为沉积体系发育提供了可容纳空间,3种影响因素共同影响了陆坡区沉积体系的发育。  相似文献   

Evaluation of ENVISAT ASAR data for sea surface wind retrieval in Hong Kong coastal waters of China   总被引：2，自引：1，他引：1  

XU Qing  LIN Hui  ZHENG Quanan  XIU Peng  CHENG Yongcun  LIU Yuguang 《海洋学报(英文版)》2008,27(4):57-62

The C-band wind speed retrieval models, CMOD4, CMOD - IFR2, and CMOD5 were applied to retrieval of sea surface wind speeds from ENVISAT （European environmental satellite） ASAR （advanced synthetic aperture radar） data in the coastal waters near Hong Kong during a period from October 2005 to July 2007. The retrieved wind speeds are evaluated by comparing with buoy measurements and the QuikSCAT （quick scatterometer） wind products. The results show that the CMOD4 model gives the best performance at wind speeds lower than 15 m/s. The correlation coefficients with buoy and QuikSCAT winds are 0.781 and 0.896, respectively. The root mean square errors are the same 1.74 m/s. Namely, the CMOD4 model is the best one for sea surface wind speed retrieval from ASAR data in the coastal waters near Hong Kong.  相似文献   

White spot syndrome virus envelope protein VP124 involved in the virus infection     

ZHU Yanbing  WU Chenglin  YANG Feng 《海洋学报(英文版)》2008,27(4):130-136

White spot syndrome virus （WSSV） is one of the major shrimp pathogens causing large economic losses to shrimp farming. In an attempt to identify the envelope proteins involved in the virus infection, purified WSSV virions were mixed with three antisera against WSSV envelope proteins （VP39, VP124 and VP187 ）, individually. And then they were injected intramuscularly into crayfish （Procambarus clarkii） to conduct in vivo neutralization assays. The results showed that for groups injected with virions only and groups injected with the mixture of virions and antiserum against VP124, the crayfish mortalities were 100% and 60% on the 8th day postinfection, individually. The virus infection could be delayed or neutralized by antibody against the envelope protein VP124. Quantitative PCR was used to further investigate the influence of three antisera described above on the virus infection. The results showed that the antiserum against VP124 could restrain the propagation of WSSV in crayfish. All of the results suggested that the viral envelope protein VP124 played a role in WSSV infection.  相似文献   

A study of SAR remote sensing of internal solitary waves in the north of the South China Sea:I.Simulation of internal tide transformation   总被引：2，自引：1，他引：1  

FAN Zhisong  ZHANG Yuanling  SONG Mei 《海洋学报(英文版)》2008,27(4)

For settlement of the well-known problem of contemporary radar imaging models,i.e.,the pmblem of a general underestimation of radar signatures of hydrodynamic features over oceanic internal waves and underwater bottom topography in tidal watels at at high radar frequency bands(X-band and C-band),the impact of the ocean surface mixed layer turbulence and the significance of strat-ified oceanic model on SAR remote sensing of internal solitary waves are proposed.In the north of the South China Sea by utilizing seme observed data of background field the nonlinearity coefficient,the dispersion coefficient,the horizontal variability coefficient and the phase speed in the generalized K-dV equation are determined approximately.Through simulations of internal tide transfor-mation the temporal evolution and spatial distribution of the vertical displacement and horizontal velocity of intereal wave field are obtained.The simulation results indicate that the maximum amplitudes of internal solitary waves occur at depth 35 m,but the maximum current speeds take place at depth 20 m in this area of the sea(about 20°30'N,114°E)in August.It was noticed that considering the effects of flood current and ebb current respectively is appropriate to investigate influence of the background shear flow on coefficients of the K-dV equation.The obtained results provide the possibility for the simulation of SAR signatures of inter-nal solitary waves under considering the impact of ocean surface mixed layer turbulence in the companion paper.  相似文献   

北部湾悬浮颗粒现场剖面测量与粒度分析   总被引：2，自引：0，他引：2       下载免费PDF全文

柏秀芳  龚德俊 《海洋科学》2008,32(7):11-10

应用LISST-100现场激光粒度仪于2006年8月在北部湾首次进行了悬浮颗粒剖面测量，获得了整个垂直剖面的悬浮颗粒现场粒径分布、体积比和光衰减系数，并计算得到了垂直剖面的总浓度和各层的粒度参数及粒级组成。结果表明，悬浮颗粒自上而下均为双峰分布，只是表层的双峰位于5．57μm和34．4μm，中间层和底层的双峰位于34．4μm和129．4μm。悬浮颗粒体积比自上而下逐渐增大，到达底层时达到最大。光衰减系数的变化趋势与颗粒体积比非常相似，且二者存在很好的相关性，相关系数高达0．98。整个垂直剖面上，表层粒度较细，随着深度增加粒度逐渐变粗，到达底层时粒度最粗。悬浮体总体上正偏，峰态值较小，分选较差。粒度以砂为主，粉砂含量次之，不舍黏土。  相似文献   

应用MODIS影像监测海州湾无机氮浓度的研究   总被引：1，自引：0，他引：1  

许勇  张鹰  刘吉堂  张东 《海洋科学》2008,32(9):76-81

利用连云港海州湾2004年至2006年的水质监测资料，选取时间上完全同步的空间分辨率为500m的MODIS Terra 1B数据，对反射率的单波段因子和波段组合因子与可溶无机氮（DIN）质量浓度之间进行相关分析。从总体上看，单波段因子与DIN质量浓度的相关性较低，但在含氮基团倍频和合频吸收带附近的波段（波段2、7）反射率与DIN质量浓度呈负相关，显示了含氮基团对水体光谱特征的影响；在波段组合因子中，因子F11（3.4）和F13（3.4）与DIN质量浓度呈显著正相关，用这两个因子建立DIN质量浓度的回归模型，R^2都达到0．7以上，相对精度达70％左右，最终选择因子F11（3.4）的线性模型反演该海域的DIN质量浓度，其结果与实际情况非常吻合。  相似文献   

A comparative analysis of metiers and catch profiles for some French demersal and pelagic fleets     

Marchal  Paul 《ICES Journal of Marine Science》2008,65(4):674-686

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柴达木盆地烃蚀变矿物高光谱遥感识别研究   总被引：2，自引：0，他引：2  

胡畔  田庆久  闫柏琨 《国土资源遥感》2009,(2):54-61

高光谱遥感识别烃蚀变矿物可用于探测油气烃类微渗漏和定位地下油气藏.以有天然气分布的柴达木盆地东部三湖地区为研究区,对Hyperion高光谱数据进行重采样处理,克服了目标识别矿物不明显和传感器低信噪比的影响.通过确定烃蚀变矿物高光谱遥感探测的指示标志,采用线性光谱(SAM)拟合与光谱匹配(SAM)相结合的方法确定了影像端元对应的矿物组分.识别结果表明,合理缩减影像波段数和确定影像端元的方法,能有效提高烃蚀变矿物的高光谱遥感识别精度.  相似文献   

渤海湾水生态环境现状和海岸带开发对其的影响研究   总被引：2，自引：0，他引：2  

聂红涛  陶建华 《海洋通报(英文版)》2009,11(2):81-96

由于沿海地区经济迅速发展，越来越多的陆源污水排入渤海湾，渤海湾生态环境系统承受着巨大的压力。本文建立了渤海湾生态环境的多级指标体系，并根据2003年至2005年多次渤海湾监测资料对其现状进行了分析；然后进一步研究了由于围海造地、海水淡化等开发工程引起的近岸海域水动力条件和污染物输移的变化。结果表明，陆源污染物大量排放、沿海开发活动加剧是影响渤海湾水生态环境的主要原因。沿海围垦不仅导致潮通量减少，潮流作用减弱，而且影响近岸海域污染物的输移和分布。海水淡化高浓度盐水的排放也对近岸海域的水生态环境造成很大的影响。  相似文献   

The biogeography of the North Pacific right whale (Eubalaena japonica)     

Edward J. Gregr  Kenneth O. Coyle 《Progress in Oceanography》2009,80(3-4):188-198

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