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1.
从物理过程和营养输送方面讨论了2006～2007年台湾海峡及其邻近海域表层水叶绿素口含量的时空变化特征及其调控因素．结果表明，台湾海峡表层水体从南至北叶绿素。含量的季节变化存在着明显差异．在北部海区叶绿素口含量平均值以春季居高，冬季最低；中部海区以秋季最高，夏季最低；南部较反常，以冬季最高，夏季最低．浙闽沿岸流、海峡暖流及上升流所造成的营养盐输入方式的差异可能是决定海峡叶绿素口含量季节分布南北差异的关键因素．分析结果还表明，春、夏季叶绿素口含量的分布在南部和北部海域均主要受营养盐限制，秋季叶绿素口含量在南部和北部海域分别主要受到磷酸盐含量和水温的影响，冬季叶绿素α含量在南部和北部海域分别主要受到硝酸盐含量和水温的影响． 相似文献
2.
用水文化学要素聚类分析台湾海峡西部水团 总被引：1，自引：3，他引：1
本文根据Helland-Hansen创立的浓度混合理论[1,2],在稀释混合过程中,把盐度作为保守性要素,通过相关分析,选出与盐度之间存在显着相关的水文水化要素,采用Q型多维聚类分析。聚合归类结果表明,台湾海峡西部水团主要有闽浙沿岸水,粤东沿岸水,闽江、九龙江、韩江冲淡水,台湾海峡混合水,内斜上升冷暖水,粤东上升流。春、夏季台湾海峡混合水是由黑潮分支、南海表层水、闽浙沿岸水、粤东沿岸水交错混合所成。秋、冬季台湾海峡混合水是由黑潮分支、东海陆架水、闽浙沿岸水、粤东沿岸水交错混合所组成。各水团明显表现出季节性的消长变化。 相似文献
3.
《应用海洋学学报》2010,(1)
从物理过程和营养输送方面讨论了2006～2007年台湾海峡及其邻近海域表层水叶绿素a含量的时空变化特征及其调控因素.结果表明,台湾海峡表层水体从南至北叶绿素a含量的季节变化存在着明显差异.在北部海区叶绿素a含量平均值以春季居高,冬季最低;中部海区以秋季最高,夏季最低;南部较反常,以冬季最高,夏季最低.浙闽沿岸流、海峡暖流及上升流所造成的营养盐输入方式的差异可能是决定海峡叶绿素a含量季节分布南北差异的关键因素.分析结果还表明,春、夏季叶绿素a含量的分布在南部和北部海域均主要受营养盐限制,秋季叶绿素a含量在南部和北部海域分别主要受到磷酸盐含量和水温的影响,冬季叶绿素a含量在南部和北部海域分别主要受到硝酸盐含量和水温的影响. 相似文献
4.
依据自适应数值模型，模拟了东中国海冬、夏季三维斜压Lagrange环流。模拟发现：台湾暖流的上层水来自台湾海峡入流和台湾东北黑潮的表层水；50m以下的深底层水主要由台湾东北黑潮的次表层水入侵陆架生成。冬季对马暖流外海一侧主要由黑潮水构成，而其近陆一侧由台湾暖流和陆架混合水构成，西朝鲜沿岸流在济州海峡汇入对马暖流；夏季它还包含转向后的长江冲淡水。冬季黄海暖流并非对马暖流的直接分支，黄海暖流水是对马暖流水和陆架水混合而成，这与传统观点相悖，而与中韩黄海水循环动力学合作调查结果一致。黄海暖流东西两侧分别为2支向南流动的滑岸流。夏季黄海环流构成基本封闭的逆时针环流。冬季渤海环流主要有一逆时针大环流，但辽东湾的环流是顺时针向的。渤海环流冬强夏弱，水流在渤海海峡北进南出。 相似文献
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6.
1998年夏、冬季南海水团分析 总被引：15，自引：2，他引：15
为了解南海水团的特征和分布 ,基于 1 998年夏季和冬季两个航次的实测资料 ,采用聚类分析、判别分析和模糊分析方法 ,对南海的水团进行了分析。结果表明 ,南海外海水可划分为 6个水团 ,即南海表层水团、南海次表层水团、南海次 中层混合水团、南海中层水团、南海深层水团和南海底盆水。越南附近夏季存在一个暖涡 ;1 998年夏季还可鉴别出黑潮表层水团和黑潮次表层水团 ,但在冬季观测期间无黑潮水越过 1 1 9.5°E经线进入南海 ;这些现象可能与厄尔尼诺现象有关联。夏季有苏禄海海水在 5 0— 75m层经由民都洛海峡侵入南海 相似文献
7.
根据2006~2007年春、夏、秋、冬季4个航次的监测数据分析闽浙沿岸流扩展范围和温度、盐度、营养盐含量平面分布季节变化特征,结果显示:调查期间,闽浙沿岸流主要分布于浙闽沿岸海域,具有明显的季节变化特征,冬季闽浙沿岸流扩展范围最大,可影响至广东南澳岛海域,秋季次之,可影响至厦门湾、东山湾海域,春季可扩展至泉州湾附近海域,夏季影响范围最小,仅局限于浙江北部沿岸海域.选取福建罗源湾、厦门湾和东山湾,分析闽浙沿岸流对典型海湾的影响,结果显示:冬季闽浙沿岸流给福建典型海湾带来了大量的营养盐物质,罗源湾、厦门湾和东山湾均受其影响,海水营养盐含量明显提高,秋季次之,春季影响略小,夏季基本不受闽浙沿岸流影响. 相似文献
8.
台湾海峡环流研究中的若干问题 总被引：28，自引：7，他引：28
台湾海峡位于北太平洋西部的中国东海和南海之间,是我国最大的一个海峡通道。由于各种原因,长期以来,台湾海峡的调查工作开展较少,只有第二次世界大战前的若干资料,但多数已较陈旧,也残缺不全;虽然二次大战后已进行过若干调查,但也仅是较零散的几个断面,特别是关于海流的调查资料更为稀少。因此,对海峡中的海水运动情况的了解,均甚零碎。早期,人们根据零星测定的资料,以及航海者和渔船的实况记录,並根据风海流的一般原理,认为台湾海峡位于亚热带季风区域,因而台湾海峡的海流,至少,表层流是受季风控制的。冬季,盛行东北季风,因而表层海水流向西南,特别是沿闽浙海岸,有一支从北向西南流动的低温低盐的中国沿岸流更为明显;而到了夏季,由于南海及海峡区域均盛行西南及南 相似文献
9.
1998年夏、冬季南海的水团及其与太平洋的水交换 总被引：3，自引：4，他引：3
根据 1998年夏季和冬季 2个航次的实测资料 ,对南海的水团进行划分和分析 ,并利用1997年 7月和 12月的实测资料 ,对巴士海峡 (吕宋海峡 )和民都洛水道附近的温盐分布进行分析。1998年冬季的资料分析结果表明 ,可将南海外海水划分为 6个水团 ,即南海表层水团 (S)、南海次表层水团 (U)、南海次 -中层混合水团 (UI)、南海中层水团 (I)、南海深层水团 (D)和南海底盆水(B)。 1998年夏季还可在南海中鉴别出黑潮表层水团 (KS)和黑潮次表层水团 (KU) ,但在冬季观测期间无黑潮水越过 119.5°E经线进入南海 ;夏季有苏禄海水在 5 0～ 75 m层经民都洛水道侵入南海。然而 ,1997年夏季和冬季的资料分析表明 :夏、冬两季都有大洋水通过吕宋海峡北段进入南海 ,南段有南海水流入太平洋。这些现象可能与 1998年前后的厄尔尼诺有关。 相似文献
10.
《应用海洋学学报》2015,(3)
通过分析2012年12月南海西北部海水中营养盐和叶绿素a浓度的数据,讨论了南海西北部海域冬季营养盐分布与结构状况.结果表明:南海西北部冬季A区(粤西沿岸)表层营养盐浓度受到冲淡水和沿岸流的影响较大,表层水的N/P、Si/N和Si/P比值均略高于Redfield比值.而B区(琼东海域)和C区(外海海域)营养盐浓度较少受到河流输入的影响.B区表层水的N/P、Si/N和Si/P比值均低于Redfield比值;B区较低的N/P比值可能与海水中的脱氮作用有关.而C区N/P比值则是Redfield比值的2倍,这可能与该区真光层(75 m以浅)固氮生物的固氮作用有关;C区也存在缺硅现象,尤其是在C区的真光层(75 m以浅)缺硅更显著. 相似文献
11.
Chen-Tung Arthur Chen 《Journal of Oceanography》2008,64(5):737-751
Surface maps of nitrate, phosphate and silicate of the East China Sea (ECS) have been constructed and are described. Reports
on exchanges of material between the ECS and the South China Sea (SCS) through the Taiwan Strait are reviewed. Recent advances
seem to have reversed the earlier view that the SCS exports nutrients to the ECS through the Taiwan Strait. This is because
the northward flow of seawater in the summer carries little nutrient. On the other hand, the waters flowing southward along
the coast of China in winter carry orders of magnitude higher nutrient concentrations. The outflow of subsurface waters from
the SCS, however, is the major source of new nutrients to the ECS continental shelves because these subsurface waters flow
out of the Luzon Strait, join the northwardly flowing Kuroshio and enter the Okinawa trough. Around 10% of the nutrients exported
from the SCS through the Luzon Strait upwell onto the ECS shelf. These inputs are larger than the aggregate of all the rivers
that empty into the ECS, contributing 49% of the externally sourced nitrogen, 71% of the phosphorous, and 54% of the silica
for the ECS. 相似文献
12.
夏季台湾海峡水及黑潮次表层涌升水向东海近陆架区营养盐输送通量的估算 总被引：2，自引：1，他引：1
According to historical mean ocean current data through the field observations of the Taiwan Ocean Research Institute during 1991–2005 and survey data of nutrients on the continental shelf of the East China Sea(ECS) in the summer of 2006, nutrient fluxes from the Taiwan Strait and Kuroshio subsurface waters are estimated using a grid interpolation method, which both are the sources of the Taiwan Warm Current. The nutrient fluxes of the two water masses are also compared. The results show that phosphate(PO4-P), silicate(SiO3-Si) and nitrate(NO3-N) fluxes to the ECS continental shelf from the Kuroshio upwelling water are slightly higher than those from the Taiwan Strait water in the summer of 2006. In contrast, owing to its lower velocity, the nutrient flux density(i.e., nutrient fluxes divided by the area of the specific section) of the Kuroshio subsurface water is lower than that of the Taiwan Strait water. In addition, the Taiwan Warm Current deep water, which is mainly constituted by the Kuroshio subsurface water, might directly reach the areas of high-frequency harmful alga blooms in the ECS. 相似文献
13.
东海西部陆架海域水团的季节特征分析 总被引：3，自引：1，他引：2
On the basis of the CTD data and the modeling results in the winter and summer of 2009, the seasonal characteristics of the water masses in the western East China Sea shelf area were analyzed using a cluster analysis method. The results show that the distributions and temperature-salinity characteristics of the water masses in the study area are of distinct seasonal difference. In the western East China Sea shelf area, there are three water masses during winter, i.e., continental coastal water（CCW）, Taiwan Warm Current surface water（TWCSW） and Yellow Sea mixing water（YSMW）, but four ones during summer, i.e., the CCW, the TWCSW, Taiwan Warm Current deep water（TWCDW） and the YSMW. Of all, the CCW, the TWCSW and the TWCDW are all dominant water masses. The CCW, primarily characterized by a low salinity, has lower temperature, higher salinity and smaller spatial extent in winter than in summer. The TWCSW is warmer, fresher and smaller in summer than in winter, and it originates mostly from the Kuroshio surface water（KSW） northeast of Taiwan, China and less from the Taiwan Strait water during winter, but it consists of the strait water and the KSW during summer. The TWCDW is characterized by a low temperature and a high salinity, and originates completely in the Kuroshio subsurface water northeast of Taiwan. 相似文献
14.
A large amount of nutrient and chlorophyll data from the North Sea were compiled and organised in a research data base to produce annual cycles on a relatively fine spatial resolution of 1° in each horizontal direction. The data originate from many different sources and were partly provided by the ECOMOD data base of the Institut fur Meereskunde in Hamburg and partly by ICES in Copenhagen to cover the time range from 1950 to 1994. While the annual cycles of nutrients and chlorophyll derived for the continental coastal zone are representative for the decade 1984–1993 only, those for the remaining parts of the North Sea may be considered climatological annual cycles based on data from more than four decades. The composite data set of climatological annual cycles of medians and their climatological ranges is well suited to serve for validational and forcing purposes for ecosystem models of the North Sea, which have a resolution larger than or equal to 1° in both longitude and latitude. The annual cycles of the macronutrients and chlorophyll presented here for 1° × 1° squares in the North Sea show especially that sufficient observational data exist to provide initial, forcing and validational data for the simulations with the 130-box setup (ND130) of the ecosystem model ERSEM. The annual cycles presented give a clear picture for the whole of the North Sea. The highest concentrations occur at the continental coasts as a result of continued river input, which is added to the ongoing atmospheric input over the North Sea. Also, from the Atlantic Ocean water with relatively high nutrient concentrations enters the North Sea via the northern boundary. In the productive areas on and around the Dogger Bank nutrient concentrations are lower than in the other parts of the North Sea, even in winter. The areas with seasonal stratification have very different annual cycles in the upper (0–30 m) and lower layers (30 m-bottom). The shallow boxes are fully mixed and exhibit a relatively fast increase of nutrient concentrations caused by summer regeneration of nutrients. 相似文献
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16.
我国近海区域对气候变化高度敏感,浮游植物生态的变化关系到我国近海生态安全.采用重构的遥感数据等资料,分析并综述我国近海区域浮游植物叶绿素a浓度、初级生产力和浮游植物群落结构对气候变化背景下海水升温、风场等环境因子的响应.结果表明,东(南)中国海叶绿素a浓度略有上升(下降)的趋势,但浮游植物群落结构和生物量有明显的变化;其中,微微型浮游植物和甲藻占比增加,小型浮游植物物种成为海区优势种,暖水性种分布区北扩,而这与气候变化背景下海洋热动力环境的长期变化及其对营养盐供给的影响关系密切.分析还指出了气候变化对我国近海区域海洋生态影响研究迫切需要开展的若干工作. 相似文献
17.
Monsoon-driven succession of the larval fish assemblage in the East China Sea shelf waters off northern Taiwan 总被引：2，自引：0，他引：2
Hung-Yen Hsieh Wen-Tseng Lo Long-Jing Wu Dong-Chung Liu Wei-Cheng Su 《Journal of Oceanography》2011,67(2):159-172
The seasonal variation in the larval fish community related to the hydrography in the East China Sea (ECS) off northern Taiwan
was studied from February to November 2004. Hydrographic conditions in the southern ECS are strongly influenced by the different
water masses due to the seasonal monsoon system. A total of 173 taxa of larval fish belonging to 68 families and 105 genera
were identified during the study period. The highest abundance of larval fish was recorded in winter, a moderate abundance
was seen in late spring and summer, and the lowest abundance in autumn. Significantly higher abundances were usually found
in the mixing zone than in ECS and the Kuroshio Current, and the number of species of larval fish was greater during the warm
period than during the cold period. The larval fish fauna in the southern ECS is a mixture of endemic and exotic species;
the latter come from the coastal waters of mainland China when the northeasterly monsoon prevails, from the South China Sea
during the southwesterly monsoon, and from the Kuroshio waters year-round. The succession of water masses induced by the monsoon
systems and the high nutrient levels caused by frontal turbulence and topographic upwelling may determine the distributions
of larval fish in terms of abundance and composition. 相似文献
18.
Transports of water and nutrients (N and P) through the Taiwan Strait were calculated using chemical hydrography and currents observed in May and August 1999. The surveys were conducted along a transect across the strait in the middle section. The velocity fields were determined by phase-averaging currents measured using shipboard Acoustic Doppler Current Profiler (ADCP) on two repeats, which were separated by 1.5 cycles of the dominant M2 tide. Nutrient distributions were also derived from phase-averaged data. The volume transports determined from the two surveys were similar (2.0 Sv and 2.2 Sv, respectively). By contrast, the nutrient fluxes obtained in August (1.82 kmol N/s and 0.34 kmol P/s) were significantly higher than those in May (0.96 kmol N/s and 0.16 kmol P/s), apparently due to coastal upwelling under southwest monsoon in summer. The rather low N/P ratios (6.0 and 5.4 by atoms) of the nutrient fluxes were attributed to the widespread N-deficiency in the upper water column of the North Pacific. The nutrient fluxes were fed mainly through a meridional deep channel off southwest Taiwan. The nutrient contributions from the Taiwan Strait to the East China Sea in spring and summer are comparable to the total riverine contributions from the Changjiang (also know as the Yangtze River) and other smaller rivers for nitrogen, but 8–17 times larger than the latter for phosphate. Therefore, the Taiwan Strait inflow may serve as an important supplement for the P-limiting condition in the huge coastal plume in the East China Sea. 相似文献
19.
南海地区潜热输送与我国东南部夏季降水的遥相关分析 总被引：16，自引：1，他引：16
使用奇异值分解(SVD)和经验正交函数展开(EOF)方法,分析了我国东南部夏季降水与前期(冬季、春季)及同期(夏季)南海潜热输送之间相关场的分布型,从中找出遥相关的“关键区”,并对找到的高相关区的可靠性进行了讨论。结果表明,我国东南部夏季降水与前期(冬季、春季)及同期(夏季)南海潜热输送相关密切,尤其春、夏季潜热输送与降水相关程度更高。前期中的冬季,南海北部潜热输送与华南及其近海地区的夏季降水有较显着的负相关关系;春季,南海中部海盆地带的游热输送与长江以南至华南沿海地区的夏季降水有较强的正相关关系;夏季,南海中部海盆地带仍是影响同期华南降水的“关键区”. 相似文献
20.
Several characteristics of water exchange in the Luzon Strait 总被引：1，自引：0，他引：1
1IntroductionTheLuzonChannelissituatedonthewest-ernsideofthenorthernPacificandbetweenTaiwanandLuzonIslands.ItisthemainpassageofthePacificwaterenteringtheSCS.Therearenumerousdifferent-sizedislandsformingmanynarrowwaterpassagesinthischannel,sotheLuzonChannelisthegeneralnameofthesepas-sages(includingBabuyan,BalintangandBashiChannels,etc.).Customarily,theLuzonStraitiscalledtheBashiChannel.Itswidthis386kmandhasameandepthof1400m. Toagreatextent,thehydro-meteorologi-calconditionso… 相似文献