Experiments in numerical modelling of the Pacific sea surface temperature anomalies

By using the atmosphere-ocean coupled model (CGCM) which is composed of a 2-level global atmospheric general circulation model and a 4-layer Pacific oceanic general circulation model developed in the Institute of Atmospheric Physics of Chinese Academy of Sciences, and two model climatological fields got from the two independent models' numerical integrations respectively, the Pacific sea surface temperature anomalies (SSTA) from 1988 to 1989 are simulated in this paper with observed atmospheric general circulation data and sea surface temperature fields as initial conditions and monthly coupling scheme. In order to remove systematic biases of the model climatological fields, interaction variables between atmosphere and ocean are also corrected simultaneously. The experiments show that the simulation results can be improved effectively if these interaction variables are corrected in spite of the fact that there always exist systematic biases in independent numerical simulations of atmospheric part and oc     

Mechanisms controlling the temporal variation of the sea ice edge in the Southern Ocean

This paper examines the mechanism controlling the short time-scale variation of sea ice cover over the Southern Ocean. Sea ice concentration and ice velocity datasets derived from images of the Defense Meteorological Satellite Program (DMSP) Special Sensor Microwave Imager (SSM/I) are employed to reveal this mechanism. The contribution of both dynamic and thermodynamic processes to the change in ice edge location is examined by comparing the meridional velocity of ice edge displacement and sea ice drift. In the winter expansion phase, the thermodynamic process of new ice production off the ice edge plays an important role in daily advances of ice cover, whereas daily retreats are mostly due to southward ice drift. On the other hand, both advance and retreat of ice edges in the spring contraction phase are mostly caused by the dynamic process of the ice drift. Based on the above mechanism and the linear relation between the degree of ice production at the ice edge and northward wind speed, the seasonal advance of ice cover can be roughly reproduced using the meridional velocity of ice drift at the ice edge.     

The Levant Slumps and the Phoenician Structures: collapse features along the continental margin of the southeastern Mediterranean Sea

Two distinct series of slumps deform the upper part of the sedimentary sequence along the continental margin of the Levant. One series is found along the base of the continental slope, where it overlies the disrupted eastern edge of the Messinian evaporites. The second series of slumps transects the continental margin from the shelf break to the Levant Basin. It seemed that the two series were triggered by two unrelated, though contemporaneous, processes. The shore-parallel slumps were initiated by basinwards flow of the Messinian salt, that carried along the overlying Plio-Quaternary sediments. Seawater that percolated along the detachment faults dissolved the underlying salt to form distinctly disrupted structures. The slope-normal slumps are located on top of large canyons that cut into the pre-Messinian sedimentary rocks. A layer of salt is found in the canyons, and the Plio-Quaternary sediments were deposited on that layer. The slumps are bounded by large, NW-trending faults where post-Messinian faulted offset was measured. We presume that the flow of the salt in the canyons also drives the slope-normal slumps. Thus thin-skinned halokynetic processes generated the composite post-Tortonian structural patterns of the Levant margin. The Phoenician Structures are a prime example of the collapse of a distal continental margin due to the dissolution of a massive salt layer.     

绒螯蟹种质资源研究进展

本文综述了近年来有关绒螯蟹属在形态学、遗传学和育种学方面的研究进展 ,着重介绍了同工酶、RAPD和 mt DNA技术在绒螯蟹群体遗传学中的应用 ,提出遗传学分类标准的建立是绒螯蟹属分子分类的关键所在。     

渤海大型底栖动物丰度和生物量的研究

于 1997年 6月、1998年 9月和 1999年 4月 3个航次对渤海的大型底栖动物进行了定量研究。在研究海区共采到大型底栖动物 30 6种 ,其中甲壳动物 97种 ,环节动物 95种 ,软体动物 88种 ,棘皮动物 11种 ,其它动物共 15种。其总平均丰度和生物量分别为 2 5 76 ind./m2和4 4 .4 7g/m2。渤海大部海区的总平均生物量在过去十年中可能未发生大的变化。渤海含砂量相对高的生境有较高的动物丰度 ,而在水位较深的水域 ,由于有较高的初级生产量到达底部 ,从而支持着较高的大型底栖动物的生物量。渤海海峡口可能是渤海大型底栖动物生物量的高值区     

Species composition and distribution of marine nematode community in the North Taiwan Strait

I~IOW~ne nelnatode is a ban gIOup of benthic OrgAnsrns. Abbot 5 000 spotes Of free-livingnelnatedes have ben dedbo so far, and it has ho estimated that abbot 20 (XX) are as yetunknoWn. Chinese bothologist has Paid attention to marine nelnatodes in China seas in yare. The spatial distribution and shoes commotion of marine nelnatedes in the HUanghe EstUary, Qinhuangdao waters, QingdaO Bay and Xiamen ~ have ho reported (Zhang etal., 1990, 1991, 1993; ac and Li, 1998). ~ new shoes in the…     

虾塘赤潮灾害的防治对策

本文报道了一次虾塘赤潮的防治过程，结合国内外有关赤潮防治的动态和作者的经验，提出了一些为避免虾塘内发生赤潮的防治对策。     

山东省虎（Panthera tigris）化石的首次发现及其意义

本文祥详细记述了山东省首次发现的虎化石的特征及出土地点和剖面的基本情况，论证了化石出土地层剖面的时代，应当属于晚更新世，并阐明了该化石发现的意义。     

菊花岛海区沉积物类型及矿物特征初探

本文对菊花岛海区沉积物类型，重矿物和粘土矿物组合分区及其分布特征进行了分析，同时对测区沉积物来源进行探讨。     

A model of the formation and development of ocean shear wave

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