上海地区未来海平面上升及产生的可能影响

未来海平面变化,特别是由于地面沉降等引起的相对海平面上升,将对沿海地区的地质环境及人类的生存发展产生极大的影响,通过对影响上海地区海平面变化主要因素的概括,对未来的相对海平面变化作出了预测,对由海平面上升引起的环境效应作了阐述,提出了相应的防治对策。强调了控制上海地区的地面沉降,以减轻海平面上升所造成的危害,具有特殊而重要的意义。     

类星体发射线和吸收线的统计分析：Ⅱ.6761颗类星体的统计分析

本文对Hewitt＆Burbidge1993年的表中列出的6761颗类星体作进一步的统计分析．全部类星体发射线范围是从0到4．9．统计分析结果表明,平均而言,吸收物质和类星体本身有联系的占46％,各间隔中差异很大,最多的在间隔zem＝0．2－0．3和3．6－3．7中占100％,最少的在0．7－0．8间隔中为零．纵看各图的分布,zem＝2．0的间隔,有明显的突出性,如类星体发射线红移值和吸收线类星体数都在zem＝2为峰值,各间隔中有吸收线≥3条和≥6条的峰值也在zem＝2等．     

国土资源信息交换系统的多级异构体系与关键技术

国土资源信息系统建设是实施国土资源政务管理和信息服务现代化的重要途径,国土资源信息交换系统是实现国土资源信息化的重要基础。本文设计了一个多级异构的国土资源信息交换体系,实现了网络环境下国土资源数据的快速传递机制,保证数据在各级国土部门的实时更新,保持各级国土资源部门数据的一致性。     

西湖凹陷东部断阶带的地质结构与演化

通过对横断阶带的地震剖面的认真研究发现，作为西湖凹陷东部边界的东部阶带在渐新世末之前并不是一个统一体，只是在经过龙井运动一幕（Ｔ２）之后才形成今日面貌。断阶带是的钓鱼岛隆褶带中部存在经岩浆侵入而复杂化的早和三纪地层。断阶带上的局部构造大多数形成于渐新世末（Ｔ２），以断背斜、逆牵引背斜为主，大部分局部构造因岩岩浆侵入和断裂作用而复杂化，对油气的保存十分不利。     

Determination of dissolved oxygen in seawater by direct spectrophotometry of total iodine

A modified procedure has been proposed for the colorimetric determination of dissolved oxygen in seawater to improve its precision and accuracy. When a pickled sample is acidified, iodine liberated in the iodometric reaction is measured by direct spectrophotometry at 456 nm. Loss of molecular iodine by volatilization is eliminated by transferring the sample to a flow cuvette without contact with air. The method was calibrated for oxygen by spiking known amounts of potassium iodate. Precision was found at better than 0.2% r.s.d. (full scale). Evaluation of accuracy was made by comparison with calculated oxygen solubilities, which shows a relative bias of no more than 0.5% for oxic waters. The analytical throughput was much faster than that of the standard titration procedure.     

Effects of the 1997–1999 El Niño and La Niña events on zooplankton abundance and euphausiid community composition within the Monterey Bay coastal upwelling system

Zooplankton abundance and euphausiid community composition were sampled seasonally (spring, summer, fall) within Monterey Bay, California, between 1997 and 1999. Measurements of sea surface temperature (SST), mixed layer depth, and upwelling indices provided concurrent data on physical oceanographic parameters. Both total zooplankton and krill abundance dramatically declined in the summer of 1997 coincident with a rapid increase in SST and mixed layer depth. Changes in euphausiid community composition occurred in concert with the decline in overall abundance. The relative abundance of the southern neritic Nyctiphanes simplex increased from August to November in 1997, the abundance of cold temperate Euphausia pacifica decreased significantly, and that of the northern neritic Thysanoessa spinifera declined dramatically. The sudden appearance of an adult cohort of N. simplex in July 1997 suggests that rapid poleward flow characteristic of coastally trapped Kelvin waves occurred between June and July of 1997. The persistent presence of warm temperate and subtropical taxa in samples collected between August 1997 and October 1998 indicates that this poleward flow continued in 1998. Zooplankton abundance, euphausiid community composition, and physical oceanographic parameters gradually returned to a more typical upwelling-dominated state in the spring and summer of 1998. E. pacifica and T. spinifera abundances gradually increased during the summer and fall of 1998, while N. simplex abundance abruptly declined in the spring of 1998. However, this recovery was confined to a narrow coastal band as a result of the onshore movement of the oceanic waters of the California Current. This was reflected by higher than normal numbers of the oceanic Nematoscelis difficilis within samples collected during the spring and summer of 1998. By the spring and summer of 1999, both zooplankton and euphausiid abundance had increased to the highest levels recorded during the 3-year study. Both E. pacifica and T. spinifera abundance increased relative to 1998 while N. simplex was completely absent in all samples. These changes reflected the cooler, highly productive environmental conditions associated with the 1998/1999 La Niña.     

不规则波折射的数学模型

本文对光易型方向函数中的集中度参数Ｓｍａｘ进行了推算，得到了在不同底坡和入射角情况下，Ｓｍａｘ～ｄ／（Ｌｓ）。的关系曲线，从而较合理地给出了浅水区域的方向谱Ｓ（ｆ，θ）。本文用谱分量的线性迭加法建立了不规则波折射的数值模式，计算了具有各种理论方向谱的不规则波在平行直线状等深线海滩上的折射。其结果得到了不规则波折射系数ｋｓｒ的计算图。将所得的结果与用正弦波求得的值作了比较。另外，本文还探讨了方向谱的分割数与不规则波折射计算精度的关系，并对如何节省计算机时作了研究，从而确定了频率和方向的最佳分割数。     

几种食用贝类淀粉酶活性的初步研究

本研究对10种常见食用贝类成体的淀粉酶在不同pH值、不同温度条件下进行了活性测定。结果表明,其总体消化器官淀粉酶的最适温度为:青蛤(Cyclina sinensis),33℃;缢蛏（Sinonovacula constricta),32℃;文蛤(Meretrix meretrix),43℃;等边浅蛤(Gomphina veneriformis),35℃;菲律宾蛤仔(Ruditapes philippinarum),34℃;泥螺(Bullacta exarata),40℃;彩虹明樱蛤(Moerella iridescens),37℃;微黄镰玉螺(Lunatica gilva),43℃;锈凹螺(Chlorostoma rusticum),43℃;疣荔枝螺(Thais clavigera),43℃;淀粉酶的最适pH值范围为4.6-4,9,不同贝类稍有不同;同一种类中肝脏淀粉酶的活性大于肠淀粉酶的活性。     

海洋生物地理信息系统

1999年6月,29个国家科学部长作出建立全球生物多样性信息中心(GBIF)的决定,Sloan基金会和美国全国海洋合作伙伴计划(ZOPP)希望参加此中心海洋部分的工作,建设海洋生物地理信息系统(OBIS)。据系统设计者设想,在若干年内,任何人从世界地图上都能获得任何海区     

中国对虾中一种与肝胰腺细小病毒混合感染的呼肠孤病毒的初步鉴定

于１９９１年９月在青岛市沙子口镇对虾养殖场采集中国对虾病虾，采用酒石酸钾－甘油密度梯度离心法从病虾肝胰腺中分离出一种呼肠孤科病毒，并通过电子显微镜观察和提取分析病毒基因组核酸等方法初步鉴定，结果显示，该病毒在酒石酸钾－甘油密度梯度离心纯化时与肝胰腺细小病毒混合存在，病毒颗粒为有包膜的正二十面体立体对称结构；带包膜的完整颗粒直径在６４－６６ｎｍ；裸露核衣壳平均直径为５３．２ｎｍ，病毒基因组由分成１０