The Characteristics of Tidal Current and Residual Current in the Southern Taiwan Strait in August,1997

根据1997年8月中旬台湾浅滩东南部和南部两个多周日定点连续观测站的海流和CTd实测资料，分析了该海区调查期间的半日潮流、余流的特征.结果表明：该海区潮流为不正规半日潮流，并且半日潮流与潮位的关系和驻波的某些性质相符；同时上、下层海流具有不同性质，其中台湾浅滩东南部测站位于锋面所在处，表层海流流速达65.5CM/S，流向EnE.Based on the three day′s time series measured current data obtained in the southeastern and southern of the Taiwan Shoal in August, 1997, we analyze the characteristics of the residual current and semi diurnal tidal current during the surveying period.The results are as follows: the characteristics of currents are not the same at the surface layer, intermediate layer and lower layer; and the tidal wave shows the characteristics of the standing wave; and the tidal current is an irregular semi diurnal tidal current. The measure stations for the southeastern of the Taiwan Shoal are located at the shelf front, where the residual current is up to 65.5 cm/s with the direction of ENE.国家自然科学基金重点资

ANALYSIS ON THE MULTI-DAYS CHANGE OF OPTICAL PARAMETERS IN THE SOUTHERN MARGINAL AREA OF THE TAIWAN SHOALS IN AUGUST 1997

通过对1997年8月中旬在台湾浅滩南部边缘海域所获得的光学参数数据进行分析 ,对水下辐照度、光束衰减率和光束透射率等主要光学参数的多周日变化规律及其形成机制进行了探讨。认为调查期间 ,台湾浅滩南部的水下辐照度自上而下表现出了很好的规律性和一致性 ,各层的辐照度随时间呈峰谷型分布 ,与太阳辐射强度规律符合得较好 ;不同时刻的光束衰减率的垂直分布基本相似 ,往往在30m层上下出现一个峰值。光束透射率与光束衰减率存在反相关系Through analysis on the optical parameter data obtained in the southern marginal area of the Taiwan Shoals in the middle August 1997, we get the multi days change rules of some main optical parameters such as underwater irradiance, optical attenuation and transmission, and deduce the forming mechanism. During the investigation period, the variation of underwater irradiance in this area is regular and consistent from upper layer to lower layer, with peak valley alternatively distributional feature, which accords with the irradiation of the sun. The vertical distribution of attenuation is similar, usually having a peak value at about 30 m layer.国家自然科学基金重点资助项目!49636220

Multi-days variation of temperature and salinity in southern marginal area of Taiwan Shoal in August 1997

通过对 1 997年 8月台湾浅滩南部边缘两站位多周日 (分别为 72和6 0h)实测数据的分析 ,对温、盐的多周日变化及其形成机制进行了探讨。认为 :表层温度主要由当地的太阳辐照度和表层流况所决定 ,表层的盐度主要由表层流况决定 ,表层的温、盐变化的周日重复性较差 ;由于台湾浅滩南部海区存在着陆架 /陆坡锋面 ,而测站恰好处于锋面中 ,在潮汐的调制下该锋面做横向摆动 ,从而导致不同物理性质的水体交替占领测站 ,导致各层次产生温、盐跃变。除某些层次在部分时段具有较好的周日重复性以外 ,其它层次和时段的周日重复性都较差。Through analysis on multi days(72 and 60 h respectively) measured data from two investigation stations in the southern marginal area of the Taiwan Shoal in the middle August 1997, we get the multi days variation rules of temperature and salinity, and deduce the forming mechanism. It's concluded that: surface temperature is controlled by local irradiation of the sun and surface currents, while surface salinity mainly by surface currents. Both temperature and salinity of the surface layer don't have good recurrent tendency. A shelf/slope front exists in the area south to the Taiwan Shoal and moves horizontally under the action of tide, which causes sea waters with different characters to occupy those stations alternately and furthermore makes temperature and salinity vary abruptly in different layers. The recurrent phenomenon usually does not appear in most layers except it sometimes appears in some layers.国家自然科学基金重点资助项目!(496 36 2 2 0号

Analysis on Distribution Features of Temperature and Salinity in the Southern Taiwan Strait in August,1997

根据1997年8月中旬台湾海峡南部海区的CTd资料，分析该调查海区温度、盐度的分布特征.其结果表明：1）温、盐垂直分布主要存在单跃层、双跃层及均匀分布3种类型；2）南澳近岸及台湾浅滩南部和澎湖以北海域存在上升流Distribution features of temperature and salinity have been analyzed by using the CTD data in the southern Taiwan Strait during the cruise in August,1997.The results show that there are 3 types of vertical TS distribution in the studied areas and there exist upwelling in the sea areas nearshore of Nanao,south of Taiwan Shoal and north of Penghu Islands.国家自然科学基

Vertical Structures of Temperature and Salinity in the Southern Taiwan Strait in August, 1997

对台湾海峡南部海区 1 997年 8月的 CTD资料进行了温、盐垂直结构分析。结果表明 :大部分调查海域存在温、盐跃层 ;台湾浅滩南部和东南部海域的温、盐垂直结构较为复杂 ,这与多种水系在此交汇有关 ,但下层海水的低温高盐特性仍表明这一海域是上升流区 ;泉州外海的下层存在低温高盐海水的爬升 ,但没有影响到表层。The vertical structures of temperature and salinity in the southern Taiwan Strait were analyzed based on the CTD data collected during August, 1997. The results are: (1) there exist thermocline and halocline in most of the studied area; (2) the vertical structures of temperature and salinity are complicated in the sea areas south and southeast of the Taiwan Shoal, which is caused by the confluence of different water systems there, but the low temperature and high salinity features of the lower layer water indicate the upwelling in the sea area; (3) the low temperature and high salinity water ascending was found in the lower layer off Quanzhou but didn′t influence the surface layer.国家自然科学基金重点项目资助!( 4963 62 2 0 );; 福建省科技资助项目!( 98-Z-1 79

Time Series Variation of Vertical Distributions of Temperature and Salinity in Two Anchored Stations in Southern Taiwan Strait in August, 1997

根据台湾海峡南部 2 个定点多周日观测站 1997 年 8 月的 C T d 资料，进行温、盐垂直分布时间变化的分析，结果表明：二测站调查期间基本上都存在温、盐跃层，跃层的强度和深度随时间变化较大，显示出较为复杂的温、盐垂直分布，与多种水系在此交汇有关.但二测站的下层稳定地存在低温高盐的海水，有向上涌升的趋势，并受潮流的影响，可见其所在的海域应为上升流区Time series variations of the vertical temperature and salinity distributions in two anchored stations in the southern Taiwan Strait have been analysed based on the CTD data during August, 1997.The results are: (1) there existed thermocline and halocline in the sea areas around two anchored staions, the strength and depth of which varied pronouncedly from time to time because of the interaction among the currents there; (2) low temperature and high salinity water can appear in the lower layer of the two studied stations, which was affected by the tidal currents,indicating the existence of the upwelling there.国家自然科学基

金丝桃素体外抗高致病性猪生殖与呼吸综合征病毒活性的研究

为研究金丝桃素体外对高致病性猪生殖与呼吸综合征病毒(PRRSV)活性的影响,以Marc-145细胞培养增殖的PRRSV为研究对象,通过噻唑蓝(MTT)比色法和观察细胞病变效应(CPE),测定吸光度值(D490nm)和半数细胞感染量(TCID50),以细胞存活率、病毒抑制率和TCID50为指标,评价不同剂量的金丝桃素体外抑制PRRSV活性的效应,并通过改变加药方式(同时、感染前、感染后给药),探讨其抗PRRSV的作用机制。结果表明,在PRRSV感染的同时加入金丝桃素,其细胞存活率和对PRRSV的抑制率略有升高,与PRRSV对照组和拉米夫定对照组相比,均有显著性差异(P<0.01)。在PRRSV感染前和感染后加入金丝桃素,其细胞存活率和对PRRSV的抑制率明显升高,且随药物浓度的增加而上升,与PRRSV对照组相比,有显著性差异(P<0.01),与拉米夫定对照组相比无统计学意义(P>0.05)。金丝桃素可使PRRSV的TCID50从6.1下降至4.15。证实,金丝桃素具有多环节体外抗PRRSV效应;不同浓度的金丝桃素表现出不同的抗PRRSV活性,并呈现剂量依赖关系