Primary productivity in the western tropical Pacific and equatorial warm waters

ＩＮＴＲＯＤＵＣＴＩＯＮＢｙｓｔｕｄｙｉｎｇｃｈｌｏｒｏｐｈｙｌｌａｎｄｐｒｉｍａｒｙｐｒｏｄｕｃｔｉｖｉｔｙｉｎｏｃｅａｎ ,ｅｉｔｈｅｒｉｎｔｈｅｂｉｇ ｓｃａｌｅｏｒｉｎｔｈｅｓｍａｌｌｓｃａｌｅ ,ｔｈｅｐｒｏｄｕｃｔｉｖｉｔｙｄｉｓｔｒｉｂｕｔｉｏｎａｎｄｖａｒｉａｔｉｏｎｏｆｍａｒｉｎｅｏｒｇａｎｉｃｍａｔｅｒｉａｌｉｎｔｈｅｔｅｍｐｏ ｒａｌａｎｄｓｐａｔｉａｌｃａｎｂｅｕｎｄｅｒｓｔｏｏｄ .Ｔｈｅｓｅａａｒｅａｓ ,ｓｉｔｕａｔｉｎｇｉｎｔｈｅｗｅｓｔｅｒｎｔｒｏｐｉｃａｌＰａｃｉｆｉｃ…     

Co60γ射线对海带幼孢子体的影响

近几年来,有关X射线对海带配子体和幼孢子体的影响以及Co60γ射线对海带配子体的影响都有过报导。本实验在于观察Co60γ射线对海带幼孢子体的影响和目前条件下可能看到的作用机制。正如Gray(1959)所指出：尽管X射线对活细胞的作用问题已有60多年的研究,但对有关的机制还是所知极少。本实验所能探讨的只是一些可见的、也就是属于细胞水平的机制。     

A study on benthic community structure in west of the Taiwan Strait and near the Taiwan Shoals

ＡｓｔｕｄｙｏｎｂｅｎｔｈｉｃｃｏｍｍｕｎｉｔｙｓｔｒｕｃｔｕｒｅｉｎｗｅｓｔｏｆｔｈｅＴａｉｗａｎＳｔｒａｉｔａｎｄｎｅａｒｔｈｅＴａｉｗａｎＳｈｏａｌｓ￥ＷｕＱｉｑｕａｎ；ＪｉａｎｇＪｉｎｘｉａｎｇ；ＸｕＨｕｉｚｈｏｕ；ＣａｉＥｒｘｉａｎｄＬｉｎ...     

Chemistry of marine resources-ⅩⅨ. The molecule design and synthesis of crow-link type alkyd resin and its enrichment behaviour for potassium ion in sea water

This paper first presents the molecule design and synthesis of crown-link type alkyd resin,and its enrichment behaviour for potassium ion in low concentration solution and sea water.On the basis of some theory concepts of Host-Guest chemistry developed in recent years,we have designed and synthesized a new polymer enrichment agent of crow-link resin for potassiumion,i.e.,polymacrocyclic ether bislactone of diethylene glycolpyromyllitic acid(briefly called crown-link type alkyd resin or PBL resin).The yield was about 97.4%,almost quantitatively.     

Relationship between the characteristics of landforms and sediments as well as the plume front in the Hangzhou Bay

Sedimentary environments in the Hangzhou Bay are introduced by a three-subregional landform pattern and a sedimentation map with six major sedimentation types. The geographic setting, sediment transportation and sedimentation in different subregions are discussed with sediment grain parameters. Sedimentary basin suffering from effect of plume front can be identified by the fine sediments with median ( Mdφ ) 7φ-8φ, clay content 30% - 40% and silt 60% - 70%. Sediment transportation along the plume front seems not to be a direct effect on sedimentary formation of the shoals fringing the south coast of the Hangzhou Bay.     

耗散源函数及LAGFD-WAM海浪数值模式的改进

本文是在LAGFD-WAM海浪模式方法基础上,根据破碎波统计理论给出了LAGFD耗散源函数形式。同时对LAGFD-WAM模式进行了改进并与WAM模式作了三种典型风场下的对比实验和实测结果检验,取得了较好的结果。     

东山湾海水中化合态无机氮的分布特征

1988年5月东山湾海水中硝酸盐、铵氮、亚硝酸盐和总化合态无机氮的平均浓度分别为3.44、1.60、0.49和5.53μmol/dm~3;8月航次这些要素的平均含量分别为1.83、0.88、0.39和3.10μmol/dm~3;11月航次这些要素的平均浓度分别为6.48、0.61、0.31和7.40μmol/dm~3;1989年2月航次这些要素的平均浓度分别为12.5、0.39、0.48和13.2μmol/dm~3。不同季节无机氮的主要外部来源不尽相同。除冬季外,其他季节无机氮的分布均在不同程度上受到浮游植物摄取的影响,其中秋季的影响最大。此外,夏季无机氮的分布还受到上升流的影响。     

2021年10月山西一次罕见持续性强降水过程物理机制分析

利用气象观测资料、NCEP/NCAR 1°×1°再分析资料以及GDAS资料,对2021年10月2-7日山西持续性强降水天气过程进行分析。结果表明：稳定的乌拉尔山低槽后部冷空气扩散,中纬度短波槽东移,与副热带高压外围西南暖湿气流持续交汇,同时高低空急流耦合形成强烈上升运动,低层切变线和地面辐合线稳定维持,及低层水汽不断输送并形成辐合,为持续性强降水的发生发展提供有利动力和水汽条件。此次强降水过程分为对流性降水和稳定性降水2个阶段,2阶段水汽输送通道的源地、路径、高度均有明显差异,但水汽输送贡献率均以对流层中低层山西南侧的水汽输送占主导地位。降水开始前,对流层中上层存在对称不稳定,大气可降水量明显跃增;对流性降水阶段,干空气不断入侵,对流不稳定快速建立与释放,对流层中低层水汽辐合区与强上升气流配合,导致山西出现强对流天气。地形的阻挡、抬升及地形收缩作用,对局地极端强降水具有增幅作用。     

Freshening of the Intermediate Waters in the Northern South China Sea over the PastSix Decades

The properties of salinity in the South China Sea (SCS), a significant marginal sea connecting the Pacific andIndian Oceans, are greatly influenced by the transport of fresh water flux between the two oceans. However, the long-termchanges in the intermediate water in the SCS have not been thoroughly studied due to limited data, particularly in relationto its thermodynamic variations. This study utilized reanalysis data products to identify a 60-year trend of freshening in theintermediate waters of the northern South China Sea (NSCS), accompanied by an expansion of low-salinity water. Thestudy also constructed salinity budget terms, including advection and entrainment processes, and conducted an analysis ofthe salinity budget to understand the impacts of external and internal dynamic processes on the freshening trend of theintermediate water in the NSCS. The analysis revealed that the freshening in the northwest Pacific Ocean and theintensification of intrusion through the Luzon Strait at intermediate levels are the primary drivers of the salinity changes inthe NSCS. Additionally, a weakened trend in the intensity of vertical entrainment also contributes to the freshening in theNSCS. This study offers new insights into the understanding of regional deep sea changes in response to variations in boththermodynamics and oceanic dynamic processes.     

鲜水河断裂带炉霍段的水平运动及地震的重复性研究

本文讨论了鲜水河活动断裂带炉霍段的水平断错、古地震遗迹与地震重复间隔等问题。晚更新世以来断裂的平均滑动速率为13毫米/年。全新世中期以来大震的重复间隔时间小于600年