MEASUREMENT OF PRIMARY PRODUCTION IN AN ENCLOSED WATER COLUMN     

吴晋平  F. A. WHITNEY  C. S. WONG 《海洋学报(英文版)》1986,5(4):584-592

A CEE (2.5 m by 16 m) has been used to study the budget of organic production by measuring the changes in POC/N, oxygen and 14CO, uptake through three-week period. 14C primary production measurements were conducted with 4-hours and 24-hours incubation periods, and with size fractionation. Different types and sizes of bottle effects were examined. Results showed that the oxygen method production was highest, followed by the 14CO2 uptake method, and POC gain showed the lowest. The value of PQ should be more than 1.7. The ratio of 4-hour incubation to 24-hour incubation was 2.42±0.22, indicating that net daily production is equal to 9.7±0.9 h of illuminated growth. Different types and sizes of bottles had little effect on primary production.  相似文献   

THE EFFECT OF MINE TAILINGS ON LEVELS OF HEAVY METALS IN SEAWATER     

C. S. WONG  F. A. WHITNEY  W. K. JOHNSON  LU XIANKUN  WU JINPING  WU SHENGSAN  LI JINXIA 《海洋学报(英文版)》1986,5(3):401-415

Changes in levels of heavy metals in seawater resulting from the addition of mine tailings were studied using plastic enclosures. Nominal concentrations of 10 mg l-1 and 100 mg l-1 of mine tailings from a B. C. molybdenum mine were added, and the metal levels were followed together with sedimentation rates, particle size distribution and other oceanographic and biological time-series parameters over sixteen days. No substantial elevation in levels of zinc, cadmium and copper was observed in the tailing bags compared to that in a background control bag with no addition of tailings. Lead showed a substantial increase in seawater following tailing addition and its removal apparently was with detritus settling following a plankton bloom, and inorganic settling of fine tailing particles.  相似文献   

POM模式在河口湾污染物质输运过程模拟中的应用   总被引：6，自引：2，他引：6  

管卫兵  王丽娅  潘建明  董礼先 《海洋学报》2002,24(3):9-17

具有复杂地形的河口湾,由于冲淡水的影响,湾内的流动具有很强的三维结构.因此要再现河口湾各种过程,必须进行三维数值模拟.在实际应用中,选用水平上采用正交曲线性网格和垂向上采用σ坐标的POM模式作为水动力模式比较合适.本研究在POM模式的基础上添加了示踪粒子三维Lagrange运动轨迹计算及水质模块,用以研究榆林湾水交换能力和污染物质输运过程.  相似文献   

Methodology for estimation of river discharge and application of the Zhujiang River Estuary(ZRE)     

CHEN Jay-Chung  WONG Lai-Ah 《海洋学报(英文版)》2004,23(3):377-386

The ZRE is a very complicated estuary with multi-river inlets. The total sum of river discharge in the upstream(away from the tidal influence region) of the Zhujiang River can be easily measured. However, when the total river discharges into the estuary from eight inlets, it is a very difficult task to obtain a continuous river discharge flux data from each branch of the Zhujiang River. However, the different ratios of river discharges between the river branches can significantly affect the estuarine circulation feature and baroclinic process. Moreover, the accuracy of numerical forecast for the estuarine circulation is very much dependent on the accuracy of the time history of the river discharge flux for each branch. Therefore, it is important to estimate river discharge from each branch in order to improve the accuracy of the model forecast for the circulation of the ZRE. The development of a new estimation method of the river discharges is focused on based on the system identification theory, numerical modeling and the time history data from the CODAR observed sea surface current. The new approach has been appfied to estimating the time history (hourly) of river discharge from each branch in the upstream of the ZRE.  相似文献   

Modelling nitrogen and phosphorus cycles and dissolved oxygen in the Zhujiang Estuary Ⅱ. Model results   总被引：2，自引：1，他引：2  

Guan Weibing  Wong Lai-Ah  Xu Dongfeng 《海洋学报(英文版)》2001,20(4):505-514

In the present study, the ecosystem-based water quality model was applied to the Pearl River (Zhujiang) Estuary. The model results successfully represent the distribution trend of nutrients and dissolved oxygen both in the horizontal and vertical planes during the flood season, and it shows that the model has taken into consideration the key part of the dynamical, chemical and biological processes existing in the Zhujiang Estuary. The further studies illustrate that nitrogen is in plenty while phosphorus and light limit the phytoplankton biomass in the Zhujiang Estuary during the flood season.  相似文献   

中国东部中生代以来之地壳运动及火山活动   总被引：9，自引：1，他引：8  

翁文灏 《地质学报》1927,6(1):1-7

此篇分中国东部地壳运动为四大期,(一)秦领期在古生代之末在东部不甚显著·(二)燕山期在东部范围较广南北皆有,其时代在侏罗纪终,白垩纪前,其连带现象为花岗闪长岩之侵入及接触铁矿及铜矿之生成,造山运动终後则有斑状火山岩流之喷出.(三)南领期南方花岗岩及金属矿带之生成约在第三纪初或至早白垩纪终.(四)陇山期第三纪後半期之摺曲惟甘东及川东较著。  相似文献   

以三角图表示石炭成分     

翁文灏 《地质学报》1927,6(1):65-67

除去灰份将炭(定炭)烟(挥发份)及水(水份)三者之百分率重行计算各在三角图中定其位置,则每种石炭可以三角图中之一点代表之.上图即以此法表示中国二十馀种著名石炭之位置,及其相互关系.以此可为石炭分类之根据。  相似文献   

PROCEEDINGS OF THE EIGHTH GENERAL MEETING HELD IN PEKING,JULY 25th. & 26th.,1924.     

W.H.WONG 《地质学报》1924,(Z1)

The eighth general meeting of the Geological Society of China was the first meeting in the year 1924, following the Annual Meeting. It was arranged in two evenings as follows.  相似文献   

Long-Term Trends in Pre-Summer Daytime and Nocturnal Extreme Hourly Rainfall in a Coastal City of South China     

苏琳  李俊鲁  黄伟健  冯志雄 《热带气象学报(英文版)》2023,29(1):39-54

The long-term trends in the occurrence frequency of pre-summer daytime and nocturnal extreme hourly rainfall(EXHR) during 1988-2018 in Hong Kong and their spatial distributions are examined and analyzed. Despite a significant increasing trend observed in the occurrence frequency of pre-summer EXHRs during the investigated period,the increase in daytime and nocturnal EXHRs show distinct spatial patterns. Nocturnal EXHRs show uniform increasing trends over the entire Hong Kong. However, the increa...  相似文献   

地球的化学成因          下载免费PDF全文

翁文波 《地球物理学报》1960,9(1):25-37

大量的地球化学资料充分地说明地球和隕星的化学成分属于同一类型.隕星中的隕石相和地壳上的超基性岩石的化学成分很相近似.二者之間的同位素比值,如He~3、C~(13)、S~(34)、Fe~(54)、Fe~(57)、F~(58)、K~(40)等都属于同一数量級.地球起源于隕星的假說有其一定的化学根据. 为了探索地球的成因,我們首先探索隕星的化学成因,第二步再探索地壳的化学成因. 本文采用热力学或物理化学的方法,这些方法在近代文献中多次被指出和試用.  相似文献