Improvement of the one-dimensional Vertical Advection-diffusion Model in Seawater

The classical 1-D vertical advection-diffusion model was improved in this work.The main advantages of the improved model over the previous one are:1) The applicable condition of the 1-D model is made clear in the improved model,in that it is substantively applicable only to a vertical domain on which two end-member water masses are mixing.2) The substitution of parameter f(z) in the equation of the classical 1-D model with end-member fraction f1^z makes the model more precisely and easily solved.3) All the terms in the improved model equation have specific physical meanings,which makes the model easily understood.Practical application of the improved model to predict the vertical profiles of dissovled oxygen and micronutrients in abyssal ocean water of the North Pacific proved that the improvement of the 1-D advection-diffusion model is successful and practicable.     

STUDY ON PREDICTION FOR TRANSPORT AND DIFFUSION OF DREDGED MATYER IN JIAOZHOU BAY, CHINA

The finite-element method was used to simulate the currents of Jiaozhou Bay and the nearcoast areas, and then established the model of the transport and diffusion of suspended particulate matter there. The transport and diffusion of dredged matter near the discharging field were estimated ; and the results were used to analyze the effects of the suspended particulate matter on the marine environment.     

我国近岸海域富营养化评价新方法及应用

参考目前国际上被广泛应用的第2代富营养化评价方法体系,结合我国近岸海域生态环境特点和监测资料现状,建立了一种以压力-状态-响应模式为基本框架、以富营养化症状为主的第2代近岸海域富营养化评价体系。实际应用结果表明,应用本方法得出的长江口海域富营养化状况评价结论,与目前国外主流评价方法的评价结论一致,而且本方法具有评价指标代表性强、数据资料易得、评价标准有据、方法简便易行等优点。     

南黄海营养盐的平面分布及横向输运

黄海对我国是颇为重要的陆架海区,也是世界上最典型的半封闭性陆架浅海之一。它和所有陆架海区一样,是人类活动、经济开发最为集中的地带,也是陆地、海洋、大气各种过程相互作用较为激烈的地带。     

STUDY ON PREDICTION FOR TRANSPORT AND DIFFUSION OF DREDGED MATTER IN JIAOZHOU BAY, CHINA

ＩＮＴＲＯＤＵＣＴＩＯＮＤｒｅｄｇｅｄｍａｔｔｅｒｉｓａｍｉｘｔｕｒｅｏｆｍｕｄｄｙｓａｎｄａｎｄｍａｒｉｎｅｗａｔｅｒ,ａｎｄｉｎｉｔｉａｌｌｙｖａｒｉｅｓｎｏｒｍａｌｌｙｉｎｄｅｎｓｉｔｙｆｒｏｍ 1 .2ｔｏ 1 .5ｇ ｃｍ3ａｃｃｏｒｄｉｎｇｔｏｔｈｅｄｒｅｄｇｅｅｑｕｉｐｍｅｎｔｅｍｐｌｏｙｅｄａｎｄｔｈｅｓｅａｂｅｄｐｒｏｐｅｒ ｔｙ.Ａｆｔｅｒｄｒｅｄｇｅｄｍａｔｔｅｒｏｎａｂｏａｔｈａｓｂｅｅｎｄｉｓｃｈａｒｇｅｄａｔａｆｉｘｅｄｐｏｉｎｔ,ｉｔｓｓｅｔｔｌｉｎｇｐｒｏｐｅｒｔｉｅｓｃａｎｂｅ…     

天然水体中悬浮粒子表面电荷的研究

本文对近二十年来天然水体中悬浮粒子表面电荷的研究工作进行了综合评述。对盐度、离子强度、pH、金属离子及海洋有机物等因素对悬浮粒子表面电荷的影响进行了总结和探讨,并得出了最一般结论。     

黄海生源要素的生物地球化学研究评述

根据黄海化学海洋学的调查和研究结果 ,概括并评述了生源要素 (包括溶解氧、pH、营养盐、CO2 与碳化学、叶绿素和初级生产力等 )生物地球化学研究的主要成果及其最新进展。提出了今后的探索方向和研究的侧重点。     

低氧环境对沉积物中生源要素生物地球化学循环的影响

目前,低氧现象已经成为一个全球性的海洋环境问题,而且有逐步恶化的趋势,据报道,世界范围内的低氧区已经由20世纪50年代以前的20多个增长到现在的400多个[1]。尤其是在近海海域,由于人为活动的影响,造成了非常严重的富营养化问题,而由此所引起的低氧现象也日益严重,并已成为海