Tectonic and geodynamic pattern of marginal seas on the West Pacific inferred from multi-satellite altewetry geoid

With the rapid development of satellite observations, we can use the altimetry geoid to study submarine tectonics and geodynamics. On the basis of the 4' x 4' geoid undulation calculated from altimeter data of Geosat, ERS-1/2 and Topex/Poseidon on the West Pacific, located between 0degreesN similar to 45degreesN, 100degreesC similar to 150degreesE, Bouguer, Glenni and isostatic geoid undulation are obtained from correction of gravitational potential of the global topography and isostacy. Moho discontinuity depth is inversed by the Glenni geoid undulation, and the stress field from small-scale mantle convection is reasonably calculated from the isostatic geoid undulation. The results show that within the Philippine Sea and the South China Sea, short-wavelength lineations of the geoid undulation are parallel or cross to magnetic lineations and rifting ridges. The Moho depth of marginal sea basins becomes shallow southward, and its values are similar to that of the Philippine Sea. These facts show that strength of tectonic activities are almost the same on the both sides of the Ryukyu-Taiwan-Philippine are. Various kinds of tectonic features with different driving mechanisms of small-middle and large-scale of mantle convection, however, display a special pattern of tectonics and geodynamics of the continental marginal seas distinguished from oceans and continents.

A moored underwater energy conservation system for profiling measurement

There is a need to obtain the hydrologic data including ocean current, wave, temperature and so on in the South China Sea. A new profiling instrument which does not suffer from the damage due to nature forces or incidents caused by passing ships, is under development to acquire data from this area. This device is based on a taut single point mid-water mooring system. It incorporates a small, instrumented vertically profiling float attached via an electromechanical cable to a winch integral with the main subsurface flotation. On a pre-set schedule, the instrument float with sensors is winched up to the surface if there is no strip passing by, which is defined by an on-board miniature sonar. And it can be immediately winched down to a certain depth if the sonar sensor finds something is coming. Since, because Of logistics, the area can only be visited once for a long time and a minimum of 10 times per day profiles are desired, energy demands are severe. To respond to these concerns, the system has been designed to conserve a substantial portion of the potential energy lost during the ascent phase of each profile and subsequently use this energy to pull the instrument down. Compared with the previous single-point layered measuring mode, it is advanced and economical. At last the paper introduces the test in the South China Sea.

Neural network retrieval of ocean surface parameters from SSM/I data

A new algorithm based on the multiparameter neural network is proposed to retrieve wind speed (WS), sea surface temperature (SST), sea surface air temperature, and relative humidity ( RH) simultaneously over the global oceans from Special Sensor Microwave Imager (SSM/I) observations. The retrieved geophysical parameters are used to estimate the surface latent heat flux and sensible heat flux using a bulk method over the global oceans. The neural network is trained and validated with the matchups of SSM/I overpasses and National Data Buoy Center buoys under both clear and cloudy weather conditions. In addition, the data acquired by the 85.5-GHz channels of SSM/I are used as the input variables of the neural network to improve its performance. The root-mean-square (rms) errors between the estimated WS, SST, sea surface air temperature, and RH from SSM/I observations and the buoy measurements are 1.48 m s(-1), 1.54 degrees C, 1.47 degrees C, and 7.85, respectively. The rms errors between the estimated latent and sensible heat fluxes from SSM/I observations and the Xisha Island ( in the South China Sea) measurements are 3.21 and 30.54 W m(-2), whereas those between the SSM/ I estimates and the buoy data are 4.9 and 37.85 W m(-2), respectively. Both of these errors ( those for WS, SST, and sea surface air temperature, in particular) are smaller than those by previous retrieval algorithms of SSM/ I observations over the global oceans. Unlike previous methods, the present algorithm is capable of producing near-real-time estimates of surface latent and sensible heat fluxes for the global oceans from SSM/I data.

Characteristics of water exchange in the Luzon Strait during September 2006

The Luzon Strait is the only deep channel that connects the South China Sea (SCS) with the Pacific. The transport through the Luzon Strait is an important process influencing the circulation, heat and water budgets of the SCS. Early observations have suggested that water enters the SCS in winter but water inflow or outflow in summer is quite controversial. On the basis of hydrographic measurements from CTD along 120 degrees E in the Luzon Strait during the period from September 18 to 20 in 2006, the characteristics of temperature, salinity and density distributions are analyzed. The velocity and volume transport through the Luzon Strait are calculated using the method of dynamic calculation. The major observed results show that water exchanges are mainly from the Pacific to the South China Sea in the upper layer, and the flow is relatively weak and eastward in the deeper layer. The net volume transport of the Luzon Strait during the observation period is westward, amounts to about 3.25 Sv. This result is consistent with historical observations.

Simulation of the ocean surface mixed layer under the wave breaking

A one-dimensional mixed-layer model, including a Mellor-Yamada level 2.5 turbulence closure scheme, was implemented to investigate the dynamical and thermal structures of the ocean surface mixed layer in the northern South China Sea. The turbulent kinetic energy released through wave breaking was incorporated into the model as a source of energy at the ocean surface, and the influence of the breaking waves on the mixed layer was studied. The numerical simulations show that the simulated SST is overestimated in summer without the breaking waves. However, the cooler SST is simulated when the effect of the breaking waves is considered, the corresponding discrepancy with the observed data decreases up to 20% and the MLD calculated averagely deepens 3.8 m. Owing to the wave-enhanced turbulence mixing in the summertime, the stratification at the bottom of the mixed layer was modified and the temperature gradient spread throughout the whole thermocline compared with the concentrated distribution without wave breaking.

A new method for the estimation of oceanic mixed-layer depth using shipboard X-band radar images

Shipboard X-band radar images acquired on 24 June 2009 are used to study nonlinear internal wave characteristics in the northeastern South China Sea. The studied images show three nonlinear internal waves in a packet. A method based on the Radon Transform technique is introduced to calculate internal wave parameters such as the direction of propagation and internal wave velocity from backscatter images. Assuming that the ocean is a two-layer finite depth system, we can derive the mixed-layer depth by applying the internal wave velocity to the mixed-layer depth formula. Results show reasonably good agreement with in-situ thermistor chain and conductivity-temperature-depth data sets.

Measurements of ocean wave and current field using dual polarized X-band radar

A new ocean wave and sea surface current monitoring system with horizontally-(HH) and vertically-(VV) polarized X-band radar was developed. Two experiments into the use of the radar system were carried out at two sites, respectively, for calibration process in Zhangzi Island of the Yellow Sea, and for validation in the Yellow Sea and South China Sea. Ocean wave parameters and sea surface current velocities were retrieved from the dual polarized radar image sequences based on an inverse method. The results obtained from dual-polarized radar data sets acquired in Zhangzi Island are compared with those from an ocean directional buoy. The results show that ocean wave parameters and sea surface current velocities retrieved from radar image sets are in a good agreement with those observed by the buoy. In particular, it has been found that the vertically-polarized radar is better than the horizontally-polarized radar in retrieving ocean wave parameters, especially in detecting the significant wave height below 1.0 m.

Vertical structure and evolution of the Luzon Warm Eddy

Eddies are frequently observed in the northeastern South China Sea (SCS). However, there have been few studies on vertical structure and temporal-spatial evolution of these eddies. We analyzed the seasonal Luzon Warm Eddy (LWE) based on Argo float data and the merged data products of satellite altimeters of Topex/Poseidon, Jason-1 and European Research Satellites. The analysis shows that the LWE extends vertically to more than 500 m water depth, with a higher temperature anomaly of 5A degrees C and lower salinity anomaly of 0.5 near the thermocline. The current speeds of the LWE are stronger in its uppermost 200 m, with a maximum speed of 0.6 m/s. Sometimes the LWE incorporates mixed waters from the Kuroshio Current and the SCS, and thus has higher thermohaline characteristics than local marine waters. Time series of eddy kinematic parameters show that the radii and shape of the LWE vary during propagation, and its eddy kinetic energy follows a normal distribution. In addition, we used the empirical orthogonal function (EOF) here to analyze seasonal characteristics of the LWE. The results suggest that the LWE generally forms in July, intensifies in August and September, separates from the coast of Luzon in October and propagates westward, and weakens in December and disappears in February. The LWE's westward migration is approximately along 19A degrees N latitude from northwest of Luzon to southeast of Hainan, with a mean speed of 6.6 cm/s.

Anti-cyclonic eddies northwest of Luzon in summer-fall observed by satellite altimeters

Anti-cyclonic eddies northwest of Luzon of the Philippines in summer-fall are identified in the merged data products of satellite altimeters of Topex/Poseidon, Jason-1 and European Research Satellites. The generation and propagation of the anti-cyclonic eddies, which are confirmed by satellite ocean color data, are found to be a seasonal phenomenon that is phase-locked to the onset of the southwesterly monsoon and the relaxation of the cyclonic wind curl in the northeastern South China Sea. The eddies originate from northwest of Luzon in summer, move across the northeastern South China Sea to reach the China continental slope in fall, and propagate southwestward along the continental slope in fall-winter, inducing shelfbreak current variations in the western South China Sea in fall-winter. The anti-cyclonic eddy discovered by Li et al. (1998) in the northern South China Sea is found to originate from northwest of Luzon and carry primarily the South China Sea waters. It does not appear to be an eddy shed from the Kuroshio in the Luzon Strait area as alluded by Li et al. (1998) and others.

中国北方海域扇贝产品质量的比较研究

由于局部养殖环境质量恶化和病害频发的困扰，严重影响了我国扇贝养殖产量、质量和出口创汇。针对扇贝养殖面临产品质量不高等问题，系统评估我国扇贝产品质量十分必要。本文以我国北方海域海湾扇贝Argopecten irradians和栉孔扇贝Chlamys farreri为研究对象，较为系统地研究了大连湾、秦皇岛、莱州湾、烟台、威海、胶州湾、胶南等七海域扇贝质量，包括营养品质、重金属富集、麻痹性贝毒污染三个方面。 研究结果表明，栉孔扇贝的蛋白质营养优于海湾扇贝，而脂类营养则低于海湾扇贝，海湾扇贝在不同海域的主成分分析可以看出，地理位置接近的海域营养状况比较相似，各海域的综合营养品质依次为：莱州湾＞烟台＞大连湾＞秦皇岛＞威海＞胶州湾＞胶南； 重金属含量存在组织差异性，贝边的含量总是高于贝柱，取自同一海域的栉孔扇贝的重金属含量高于海湾扇贝，六种重金属的平均含量排序为：Zn＞Cu＞Cd＞As＞Pb＞Hg，部分海域扇贝Cd和Zn有超标现象，两种重金属分别超标1.41～17.28倍和1.24～1.59倍，Hg、Pb、As和Cu均未超标； 用小白鼠生物测试法对扇贝内脏团、贝柱和其他组织的贝毒含量进行测定，结果仅在秦皇岛和大连湾海湾扇贝的内脏团中检测出麻痹性贝毒，其毒力分别为2.17 Mu•g -1和2.48 Mu•g -1，未超过食用安全标准（4 Mu•g -1），其他海域的样品均未检测到麻痹性贝毒的存在。

卫星高度计资料在海洋潮汐研究中的应用

本文依据收集到的392个地面验潮站8个主要分潮（M2、S2、K1、O1、N2、K2、P1及Q1）的调和常数，对现有7个全球大洋潮汐模式的准确度进行了检验，结果显示各模式在深海区域均达到了比较高的准确度，相互之间差别也不大。经验模式GOT00和CSR4.0、同化模式NAO99、反演同化模式TPXO7.0、数值同化模式FES2002和FES2004的M2分潮均方根偏差在3 cm左右，其它分潮（S2、K1、O1、N2、K2、P1及Q1）大约在1～2 cm。本文还依据中国近海18个岛屿的调和常数对其中的5个大洋潮汐模式的准确度进行了检验，结果表明，M2分潮均方根偏差在6～14 cm，明显高于大洋部分的偏差，其中日本国家天文台的潮汐模式NAO99在中国近海的结果相对较准确。 我们利用1992年8月至2008年8月的TOPEX/POSEIDON和JASON-1(T/P-J)卫星高度计资料，对沿卫星轨道的302816个站点进行了14个分潮的潮汐调和分析，得到了全球大洋潮汐的8个主要分潮以及2个气象分潮Sa、Ssa的经验同潮图。主要结果有：（1）各分潮在卫星上升轨道与下降轨道的交叉点(约7000个)相关性分析表明：M2分潮的振幅和迟角的相关系数很高（分别为0.9965和0.9961）；S2，K1，O1和Sa分潮也有较好的相关性（相关系数为0.94～0.99）；（2）该结果与392地面个验潮站吻合较好，其中M2分潮的振幅、迟角和向量的均方根偏差分别为：1.73 cm，2.340和2.93 cm；S2，K1和O1分潮的振幅、迟角和向量的均方根偏差为1 cm左右，5.250～7.270和1.5～2.1 cm，该精度与最近几年国际上的主要大洋潮汐模式的准确度相近；（3）首次通过卫星资料获得了Sa、Ssa分潮的同潮图。周期为1年的Sa分潮与大洋105个地面站相比，振幅、迟角和向量的均方根偏差分别为1.50 cm、18.360和2.16 cm。在此基础上，进一步分析了构成Sa、Ssa气象分潮的两个主要因素（海水密度以及海面气压）在全球的分布。 在T/P-J等卫星资料无法覆盖到南大洋和北冰洋，本文利用Princeton Ocean Model（POM）进行了数值模拟，模拟结果与162个地面实测站（其中南大洋30个，北冰洋132个）的观测比较一致。基于卫星资料分析的结果和数值模拟结果合并得到了全球大洋的8个主要分潮同潮图。在此基础上通过全球潮汐能量耗散的计算得到潮能通量的分布，并得到全球M2、S2、K1和O1分潮的潮汐能量耗散率为2.431TW、0.401TW、0.336TW和0.176TW。 本文还利用卫星资料对南海潮汐进行了研究，在中国南海，获得了主要的半日潮、全日潮、四分日分潮和长周期分潮（M2，S2，N2，K2，K1，O1，P1，Q1，M4, MS4，Sa, Ssa）的经验同潮图。与南海沿岸94个地面验潮站的数据符合得比较好，M2，S2，K1及O1等4个主要分潮的平均振幅差为2～4 cm，均方根偏差分别是9～11 cm.其它4个主要分潮N2，K2，P1，Q1的平均振幅差为1～2 cm，均方根偏差为2～4 cm。此外，本文还利用卫星高度计资料潮汐分析结果沿卫星轨道进行高通滤波，分离得出中国近海的M2，S2，K1及O1分潮的内潮信息。

南海对于台风伊布都响应的数值研究

台风是发生在海洋上的强烈天气系统，是海气相互作用最为直观的表现形式。台风产生的海面气旋式风应力以及强烈的混合过程，对上层海洋与深层海水之间的热量、能量和物质交换产生重大影响，因此研究海洋对于台风过程的响应特征具有重要的科学意义。 首先，采用海浪模式WWATCH-Ⅲ模拟计算了台风伊布都期间南海的波浪场。结果表明：随着台风中心向西移动，最大浪高区域也逐渐向西移动。接近台风中心的波高和波龄都较大，而远离台风中心的波高则相对较小、波浪比较年轻，并且波高的分布具有明显的右偏性。同时，对考虑了波浪作用的海面风应力进行了计算，为后续的海洋模式的计算奠定了基础。 其次，采用上述计算的海面风应力作为POM模式的驱动，研究了南海流场和温度对于台风的响应。结果表明：台风过后，海洋表面温度下降2~6oC，且在台风路径两侧不对称，具有明显的右偏性。受台风强混合作用的影响，混合层加深10~60m，上混合层热量损失约824.78W/m2，其中垂向混合是造成热量损失的主导动力因素。由于受上混合层热通量输送的影响，混合层以下附近水层处于增温状态，海水温度做近惯性波动。同时，台风还能引起强烈的近惯性流，最大流速出现在上混合层，可达1.4m/s。 最后，对论文的研究工作进行了总结，并对未来的研究方向进行了展望。

南海新生代碱性玄武岩的特征及其地球动力学意义

南海是西太平洋最大的边缘海之一，位于欧亚板块、印-澳板块以及太平洋板块之间。南海海底扩张停止(15.5Ma, Briais et al., 1993) 后的板内火山作用，影响着中国南部、中南半岛、大洋基底和分裂的微大陆片段的广大地区。对南海新生代玄武岩进行地球化学研究，不仅对于理解南海板内火山作用的深部地幔过程有着重要意义，而且对南海形成演化及含油气盆地形成的深部动力学机制有着深远意义。 南海新生代玄武岩K-Ar/Ar-Ar年龄为3.8-7.9Ma, 表明为晚中新世以来的岩浆活动产物，与周边地区的碱性火山岩在年龄上的一致性。岩石学特征表明，南海新生代玄武岩的矿物组合为橄榄石、单斜辉石、斜长石，与特征的碱性玄武岩的矿物组合一致。由橄榄石所计算的南海底潜在地幔温度(Tp)平均值为1661℃, 暗示南海地区下的地幔可能存在热量异常，为海南地区存在地幔柱的观点提供了证据。单斜辉石富钙、钛，由单斜辉石-熔体平衡温压计计算的岩浆房深度分别为：碱玄岩岩浆房深度约49km（对应压力为1.46～1.48 GPa）；粗面玄武岩岩浆房约25km（对应压力为0.76 GPa）；玄武岩岩浆房约15km（对应压力为0.44GPa）。由碱玄岩→粗面玄武岩→玄武岩，平衡温度(K)依次降低:从1535～1498→1429→1369。由斜长石微晶所计算的岩浆喷出地表的温度为989℃。 主量元素特征表明，岩石类型主要为碱玄岩，有少量的粗面玄武岩和玄武岩，属于碱性系列。微量元素方面，大离子亲石元素(LILE)以及高场强元素（HFSE）特别是Nb、Ta、Ti、Y等元素均呈现富集现象，Yb、Sc、Sr以及K、U、Th等生热元素相对亏损，微量元素及稀土元素分布岩石类似板内OIB微量元素的全球平均值。同位素地球化学研究表明，源区存在两个混合端员并具Dupal Pb异常：一个为DMM，位于软流圈或岩石圈地幔中；另一个为EM2源区，可能来自位于核-幔边界处的海南地幔柱而非大陆底岩石圈地幔。研究表明，南半球Dupal异常不存在全球范围内的地区专属性，本区存在的Dupal异常与南半球Dupal异常可能不存在联系。在南海新生代玄武岩的成因过程中，海南地幔柱在为岩石圈地幔的部分熔融作用提供所需的热量同时，也在物质上作出了贡献。南海盆新生代碱性玄武岩由不同程度的部分熔融作用，以及岩浆在上升期间或者在高位岩浆房中的橄榄石等矿物分离结晶作用所形成，同时还可能发生了堆晶作用。构造环境判别表明，玄武岩浆在上升到地表过程中几乎未受到地壳混染。 南海新生代玄武岩的地球化学研究表明，在玄武质岩浆的深部地幔演化过程中，海南地幔柱可能起着重要的作用。通过引入海南岛地幔柱这个概念，本文建立了一个新的有关南海形成演化的初步的概念性模型：（1）50-32Ma，印度洋板块-欧亚板块碰撞及其所导致的太平洋板块后退的综合效应为南海地区提供了一个伸展环境，此伸展环境为地幔柱物质的上升提供了通道；（2）32-21Ma，当地幔柱柱头到达软流圈时, 通过侧向物质流开始同扩张中心发生相互作用，促进了南海的扩张，并在26-24Ma期间发生了洋脊重新就位事件，使扩张中心从原来的18°N附近(即现今西北海盆的中心)调整到15.5°N附近（即现今的东部亚盆）；（3）21-15.5Ma, 随着地幔柱效应的逐渐增强，热点-洋脊相互作用越来越强烈，在大约21Ma发生了洋脊的再次重新就位事件，诱发了西南海盆的扩张；（4）15.5-现在，由于印澳板块前缘与巽他大陆碰撞，使得南海大约在15.5Ma停止扩张,并沿着南沙海槽及吕宋海沟向菲律宾岛弧及巴拉望地块之下俯冲，而南海热点继续活动，在地表处直到第四纪还有碱性玄武岩喷出。

中国近海浮游植物光合作用研究——初级生产力模型计算与活体叶绿素荧光测量

本文的研究内容是初级生产力模型计算方法以及活体叶绿素荧光测量方法在我国近海浮游植物光合作用研究中的应用。 论文对在我国近海实测的1321 组叶绿素垂直分布数据以及84 组初级生产力数据进行了非线性拟合分析，得出了描述叶绿素和初级生产力垂直变化规律的相应参数。结合光合参数——初始斜率α 的平面分布将我国近海分为9 个光合作用特征相对独立的分区。以光强和遥感叶绿素为输入变量，以各分区实测参数的平均值为模型参数，首次建立了分海区的时间－深度积分初级生产力计算模型。 对拟合参数的分析表明：我国近海深水叶绿素峰（DCM）在夏季最明显而在冬季则不明显，这与夏季温跃层的形成和冬季温跃层消失的规律相符合。最大光合速率参数主要受温度和营养盐状况的影响，但整体而言各个季节的变化不大。光合作用初始斜率参数主要受浮游植物光照条件和光照历史的影响，从春季到冬季持续增加，基本与光照强度的变化刚好相反。光抑制参数反映着浮游植物对高光强伤害的敏感性，它在夏、秋季较低而在冬季较高。 模型计算结果表明我国近海初级生产力规模约为6.4±1.0×108tC/a。总体来说我国近海海域初级生产力北方高于南方，西部高于东部。北方初级生产力高峰期大都出现在夏季而南方出现在冬季，中部则高峰期出现在春秋两季，与温跃层出现和消失的规律有一定的相关性。与由实测生产力推算的初级生产力相比，本模型的计算结果较高，误差产生的原因包括二类水体遥感叶绿素浓度偏高、地形因素等。与VGPM相比较，本模型的计算结果更接近于实测结果。模型中云覆盖度参数的变化可能引起计算结果约25％的变化，当取云覆盖度参数为0.5 时的计算结果与用实际天气状况数据的计算结果较为接近。制作了基于分区模型的水柱初级生产力计算软件，可在仅测量叶绿素浓度的情况下进行水柱初级生产力的计算。 模型准确度的进一步提高的途径主要包括实测参数数量的增加以及遥感叶绿素浓度准确性的提高。 与初级生产力相比，活体叶绿素荧光测量可以更快速、简便地跟踪浮游植光合作用动态。本研究首次将活体叶绿素荧光测量方法应用于野外浮游植物光合作用状态研究。通过暗驰豫实验，建立了使用OS5－AFM藻类荧光仪现场测定活体叶绿素荧光参数——Fv/Fm（光化学效率）的操作方法，并对胶州湾海域浮游植物光化学效率进行了高时空分辨率的调查，对相关因素进行了分析，并尝试通过Fv/Fm进行初级生产力计算。 结果表明，胶州湾海域表层Fv/Fm值的全年平均值约0.37，处于中等偏低水平。Fv/Fm值在秋季最高而春季最低，其平面分布在夏季较均匀而在春季则有较大的区域差异。湾东部Fv/Fm值变化幅度较大，一年中有4 个高峰期；而湾西部Fv/Fm值变化幅度较小，一年中有3 个高峰期。光合作用最活跃的海区随季节更替而变化，其年变化模式可能具有一定的重复性。不同深度上Fv/Fm值的海区平均值没有显著差异，但底层Fv/Fm值的空间差异较小。 通过对营养盐和Fv/Fm值时间变化的分析，首次发现了自然水体中Fv/Fm值变化对氮盐浓度变化响应的滞后效应，在不同的站点，影响Fv/Fm值的氮盐种类有所不同，湾西部海域与NH4+相关性较高而湾东部海域与NO3-的相关性较高，P、Si等则与Fv/Fm值基本无相关性。滞后期的长度并不稳定，1 旬和2 旬的滞后现象都可观察到。Fv/Fm值变化率与氮盐浓度变化率之间的相关性高于Fv/Fm值与氮盐浓度之间的相关性。这表明即使在胶州湾这样无机氮浓度很高、浮游植物生长基本不受氮源限制的水体，氮源浓度的变化仍然影响着浮游植物的光合作用状态。 初步建立了由Fv/Fm测量结果计算初级生产力的方法。模型的计算结果与文献资料中胶州湾水域初级生产力的时空分布趋势基本一致，但在数量上明显低于传统估算的结果。获得更多同步测量的初级生产力和Fv/Fm值数据可逐渐改善这一方法计算结果的准确性，并可籍次方法更快更方便地进行初级生产力的测算。

东海悬沙浓度垂向分布规律研究

细颗粒泥沙运动及冲淤变化在深水航道整治工程中至关重要，研究细颗粒悬沙运动，悬沙浓度是一个关键。研究悬沙浓度，首先要研究悬沙浓度的水平和垂向分布，其中，垂向浓度又是海水中悬沙三维分布研究的核心。 本文以2006年8月的长江口外海域的悬沙数据资料为基础，把经典的泥沙扩散理论模型和两相流颗粒浓度分布的运动理论模型的关于垂向含沙分布的理论，作为本研究的回归模型的理论依据，通过观测获得的悬沙浊度资料对应求出观测垂向剖面浓度，采用相关分析和多元线性回归的方法，分析了长江口外海域的悬沙浓度垂向分布特点，回归出悬沙垂向浓度分布模型，为了更好的揭示水动力条件对浅海陆架区悬浮物的影响，本文还用短期资料的潮流准调和分析方法，对东海三定点分表中底三层的25小时连续海流资料进行分析，计算了三测站六个主要分潮的北、东分量潮流调和常数，由于原始记录带有扰动信息，经过预处理计算出来常规每小时一次的海流观测结果，把海流加入了悬沙垂向分布模型。并在整个研究区域验证了悬沙垂向浓度分布模型。结果表明：垂向浓度的大小与相对水深相关性良好，而水深对其的影响则表现在梯度变化方面。通过悬沙垂向浓度模型，由海水底层浓度和海流可以计算得到不同水层的悬沙浓度；有效性检验和拟合结果检验表明，该模型置信度较高，且能够较为有效的预测海水中、上层水体的悬沙浓度值。