冬季东亚主要行星尺度环流分量的时空特征及其相互行用     

周发琇  H.-L.Pan 《中国海洋大学学报(自然科学版)》1987,(2)

本文采用一种复经验正交函数分析方法和滤波技术,对1978—79年冬季全球冬季风实验资料系列FGGE-Ⅲb进行分析,尤其对东亚地区时间尺度10—20天的主要行星尺度环流分量进行分解,结果表明影响气压和厚度场的决定性因子是冷季风潮,受季风潮影响200百帕上无辐散风u_φ第一模态以1—2天滞后沿经向和纬向有类似于季风潮的传播;季风潮振动导致局地经向环流相应变化,以无旋风V_X第一模态表示的Hadley环流几乎无经向传播但有明显的纬向传播,并在传播过程中加强;热带对于副热带存在反馈并通过u_φ第二模态实现。在急流入口处u_X第二模态表示次级环流的存在,其水平尺度约20个纬距。  相似文献   

用¹³C-NMR光谱法研究几种红藻含硫半乳聚糖的结构特征   总被引：1，自引：1，他引：1  

纪明侯  高洪峰  曹文达  范晓 《海洋与湖沼》1996,27(3):330-335

于１９８９年８月对采自青岛地区的５种红藻用冷水和热水分步提取或直接加热提取方法制备含硫半乳聚糖，对其多糖进行的＾１３Ｃ－光谱分析结果表明，扁江蓠多糖主要由琼胶糖和６－硫酸基－琼胶糖组分构成，海萝和多管藻多糖主要由６－硫酸基－琼胶糖组成，并含微量琼胶糖前体，６－ＯＣＨ３－琼胶糖组分，此两种藻的热水提取物中还含有微量２－ＯＣＨ３－琼胶糖，三叉仙菜的热水提取多糖主要由琼胶糖的前体组成；从海膜多糖谱图的信  相似文献   

Habitat association of plaice, sole, and lemon sole in the English Channel   总被引：1，自引：0，他引：1  

Hinz  Hilmar; Bergmann  Melanie; Shucksmith  Richard; Kaiser  Michel J.; Rogers  Stuart I. 《ICES Journal of Marine Science》2006,63(5):912-927

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白沙河平原区地下水资源现状供需平衡分析     

邱汉学  刘贯群  郑继民  焦超颖  董怡喜 《中国海洋大学学报(自然科学版)》1994,(Z3)

利用白沙河含水系统数值模拟模型和白沙河平原区需水预测模型的预测结果，对白沙河平原区水资源现状供需状况进行分析，指出：单纯依靠地下水供水时，缺水率达２０％以上，含水层系统有１／５的面积经常处于疏干状态．这一结果为更好地设计管理方案提供了依据。  相似文献   

Sedimentary records of multidecadal-scale variability of diatom productivity in the Bungo Channel, Japan, associated with the Pacific Decadal Oscillation     

Michinobu Kuwae  Azumi Yamashita  Yuichi Hayami  Atsushi Kaneda  Takashige Sugimoto  Yoshio Inouchi  Atsuko Amano  Hidetaka Takeoka 《Journal of Oceanography》2006,62(5):657-666

In order to examine the responses of primary productivity in the southern coastal sea of Japan to the Pacific Decadal Oscillation (PDO) in the 20th century, sedimentary records of diatom productivity (diatom valve fluxes) were reconstructed using core samples from the Bungo Channel (BC) in southwest Japan. The record of the Thalassionema spp. flux—the best index of fall primary productivity in the BC—indicated a multidecadal-scale duration with a low flux (1943–1982) and those with a high flux (1913–1943 and 1982–2001); apparent shifts were recognized in 1943 and 1982. The shift in 1982 was also recognized in the flux records of other early summer to fall predominant genera in the BC and, previously, in the biogenic silica records from a broad region of the southeast BC. This indicates that in our records, this shift reflects a general trend in the primary production in the southeast BC. A comparison among the Thalassionema spp. flux records, meteorological data from an observatory adjacent to the core site, and the PDO index showed that the flux records were more similar to the PDO index than the other meteorological records, which suggests that the multidecadal-scale variability of the BC primary productivity may be associated with some marine-derived forcing. The bottom intrusions of nutrient-rich water that upwelled from the shelf slope into the BC, the axis movement or the transport of the Kuroshio Current off the BC, and a basin-scale wind stress in the North Pacific might play an important role in this forcing and mediate between the BC primary productivity and the PDO.  相似文献   

Macrobenthic resources of the shallow soft-bottom sediments in the eastern English Channel and southern North Sea   总被引：1，自引：0，他引：1  

Desroy  N.; Warembourg  C.; Dewarumez  J. M.; Dauvin  J. C. 《ICES Journal of Marine Science》2003,60(1):120-131

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黄骅坳陷中区磁异常研究     

姜效典 《中国海洋大学学报(自然科学版)》1993,(Z1)

用模糊数学方法研究黄骅坳陷中区,识别油气田磁异常以及由其它因素引起的磁异常。  相似文献   

Nutrient contributions to the Santa Barbara Channel, California, from the ephemeral Santa Clara River   总被引：2，自引：0，他引：2  

Jonathan A. Warrick  Libe Washburn  Mark A. Brzezinski  Dave A. Siegel 《Estuarine, Coastal and Shelf Science》2005,62(4):559-574

The Santa Clara River delivers nutrient rich runoff to the eastern Santa Barbara Channel during brief (1–3 day) episodic events. Using both river and oceanographic measurements, we evaluate river loading and dispersal of dissolved macronutrients (silicate, inorganic N and P) and comment on the biological implications of these nutrient contributions. Both river and ocean observations suggest that river nutrient concentrations are inversely related to river flow rates. Land use is suggested to influence these concentrations, since runoff from a subwatershed with substantial agriculture and urban areas had much higher nitrate than runoff from a wooded subwatershed. During runoff events, river nutrients were observed to conservatively mix into the buoyant, surface plume immediately seaward of the Santa Clara River mouth. Dispersal of these river nutrients extended 10s of km into the channel. Growth of phytoplankton and nutrient uptake was low during our observations (1–3 days following runoff), presumably due to the very low light levels resulting from high turbidity. However, nutrient quality of runoff (Si:N:P = 16:5:1) was found to be significantly different than upwelling inputs (13:10:1), which may influence different algal responses once sediments settle. Evaluation of total river nitrate loads suggests that most of the annual river nutrient fluxes to the ocean occur during the brief winter flooding events. Wet winters (such as El Niño) contribute nutrients at rates approximately an order-of-magnitude greater than “average” winters. Although total river nitrate delivery is considerably less than that supplied by upwelling, the timing and location of these types of events are very different, with river discharge (upwelling) occurring predominantly in the winter (summer) and in the eastern (western) channel.  相似文献   

南沙群岛海域泻湖及礁外沉积物间隙水中的-2价硫   总被引：1，自引：1，他引：1  

宋金明  李鹏程 《海洋与湖沼》1996,27(6):590-597

于1993年5月和1994年3－4月通过调查，用硫离子选择电极法研究南沙群岛海域泻湖及礁外沉积物间隙水中的∑S（－Ⅱ）及SO~(2-)_4，探讨泻湖内及礁外间隙水中-2价硫的分布特征，沉积物-海水界面间硫的扩散转移通量和-2价硫的热力学平衡控制体系。结果表明，该海区∑S（－Ⅱ）含量，泻湖间隙水中远比礁外高，人为活动剧烈的礁内泻湖高于人为活动少的泻湖，离礁近的礁外间隙水中的高于远离礁的间隙水中的。在礁外沉积物间隙水中-2价硫含量呈垂向增加的趋势，沉积物-海水界面间HS-，S2-均是从沉积物向上覆海水扩散，SO反之。礁内泻湖的扩散量远高于礁外的，HS-扩散总平均为61．34μmol／（m2·d），SO为-0．41mmol／（m2·d）；礁外泻湖的HS-总平均为14．96μmol／（m2·d），SO为-0．35mmol／（m2·d）。该海区的-2价硫主要由S＋2e→S2-氧化还原电对控制，平衡时Eh计算值与实测值接近，单质疏作为亚稳态可存在于沉积物中，并可与溶解铁继续形成自生黄铁矿（FeS2）沉淀。  相似文献   

皱纹盘鲍脓疱病病原菌──河流弧菌-Ⅱ的抗药机制的初步研究     

李太武  丁明进  宋协民  相建海  刘瑞玉 《海洋与湖沼》1996,27(6):637-645

1993年9月至1995年末，大连地区的一龄鲍至成鲍都出现了脓疱病，用常规方法从3个养殖厂的病鲍中分离到了3个菌株，分别为D株、N株和T株。经鉴定这3个菌株为同一种──河流弧菌-Ⅱ。这3个菌株来自3个不同的海区、不同的单位，并且这3个单位使用的抗生素种类和浓度也木同，所以这3个菌株对18种抗生素的敏感度也木同。D株对环丙沙星（抑菌坏直径30mm）、复方新诺明（抑菌坏直径27mm）等敏感，而对青霉素、青霉素Ⅱ、氨苄青霉素（抑菌环直径0mm）等耐药。N株除对青霉素Ⅱ、白霉素、吡哌酸等耐药外，对其它12种抗生素都敏感或中度敏感（抑菌环直径13．5－30mm）。T株对氟派酸（抑菌环直径22mm）、环丙沙星（抑菌环直径20．3mm）等敏感，而对氯霉素、复方新诺明等耐药。研究发现，经常使用同一种抗生素很容易使病原菌产生耐药性．连续3d使用单一的抗生素（青霉素）就会产生耐药的菌株。为证明上述3个菌株的抗药性是属于哪一类，以T株为例，提取总DNA，并对总DNA进行EcoRⅠ酶切图谱分析，图谱有明显的异同，说明3个菌株的抗药性不同可能与基因突变有关。不管是非遗传型还是遗传型，都是由于抗生素为细菌提供了耐药突变株的选择环境，从而使耐药菌株得以大量繁殖。  相似文献