斯里兰卡南部西向沿岸流在西南季风期间的动力学研究

北半球夏季,北印度洋环流主要受到西南季风流控制,将热带印度洋水体从西向东进行跨海盆输运,然而在斯里兰卡南部沿岸存在一支与西南季风流方向相反的西向沿岸流,即南斯里兰卡沿岸流（SSLCC）.本文主要利用ECCO2资料进行南斯里兰卡沿岸流的动力学特征研究.结果表明,SSLCC的形成和孟加拉湾局地环流密切相关.当斯里兰卡穹顶区（SLD）环流偏强时,斯里兰卡南部形成局地气旋式涡旋,斯里兰卡东部沿岸流在SLD西部向南流动,随着气旋式涡旋北部转向西流形成强的SSLCC.相比之下,SLD较弱时,沿岸流仅存在斯里兰卡东部沿岸,斯里兰卡东部沿岸流无法向西转向,SSLCC和西南季风流一起向东流动,其可能的主要原因是局地风应力对SLD产生的强度影响.研究还表明,SLD强度对SSLCC流向和强度有着重要影响.     

South China Sea Warm Pool in Boreal Spring

During the boreal spring of 1966, a warm-core eddy is identified in the upper South China Sea (SCS) west of the Philippines through an analysis of the U.S. Navy’s Master Oceanographic Observation Data Set. This eddy occurred before the development of the northern summer monsoon and disappeared afterward. We propose that this eddy is a result of the radiative warming during spring and the downwelling due to the anticyclonic forcing at the surface. Our hypothesis suggests an air-sea feedback scenario that may explain the development and withdrawal of the summer monsoon over the SCS. The development phase of the warm-core eddy in this hypothesis is tested by using the Princeton Ocean model     

正压大气中根据天气和同化资料制作统计-动力预报

1.前言从一些离散的观测站采样而得某一气象变量的主观分析多半会和它的真实情况不同。如果这种不确定的分析用作数值预报的初始状态,那么所作预报也将会有误差。格利森1961年发展的一种统计-动力理论对这种初始状态的误差及其随时间增长作了定量处理。在这种理论模式中用调整物理模式的动力项将初始误差的正态分布转为预报误差的正态分布。从最终的分布求得预报量处于其真实数值的某一允许偏差范围内的理论概率。实际上这样也就作出了对预报     

Ecosystem history of Mississippi River-influenced continental shelf revealed through preserved phytoplankton pigments

Pigments determined by high performance liquid chromatography (HPLC) provide useful information concerning water column and epibenthic plant and microbial communities in both extant communities and accumulated sediments in lakes, estuaries and the ocean. Chlorophyll and its degradation products provide an estimate of overall biomass, and carotenoid pigments provide taxonomic biomarkers of phytoplankton. We examined the pigments preserved in sediment cores from the Louisiana continental shelf adjacent to the outflow of the Mississippi River system to document changes in phytoplankton community composition, phytoplankton abundance, and conditions of hypoxia over time. Carbon accumulated in sediments from water depths of 20-60 m is primarily derived from marine phytoplankton and represents the history of phytoplankton communities in the overlying water. There is a general increase in chlorophyll a, pheopigments, zeaxanthin, fucoxanthin and most carotenoids over time, with the change gradual from 1955 to 1970, followed by a fairly steady increase to 1997. The highest chloropigment concentrations are in cores from areas more likely to be exposed to seasonal hypoxia. These indicate an increase in eutrophication in the form of greater diatom and cyanobacterial production, or a worsening of hypoxia, or both. This trend expanded westward along the Louisiana shelf in the 1990s.     

On the Possible Oil Fields in Szechuan as Indicated by Isocarb Lines

Ⅰ. INTRODUCTION From the considerations of the scattered oil occurrences and suitablegeological structures, the Red Basin of Szechuan has long been regarded as apromising country for oil prospecting. In the last decade much attention hasbeen paid by geologists and engineers to the search for oil resources in certain     

ON LOPINITE,A NEW TYPE OF COAL IN CHINA

To the east of Nanchang,the capital of Kiangsi Province,there cropsout a continuous belt of Permian coal series~1 trending approximately in thedirection from N.E.to S.W.Broadly speaking,this coal belt forms a synclinal     

On some Psilophyton-like Remains from the Tiaomachien Series in Central Hunan Senes Centra Hunan

It had long been my wish for an opportunity to collect more MiddleDevonian plants in the Tiaomachien series in central Hunan.InDecember 1936,I was able to realize my plans.I was fortunate enough     

Fossil Vertebrates from Kuangyuan, N. Szechuan, China

正 During the late spring of 1941, Messrs. M. N. Bien, T. H. Mi and the present writer were fortunate enough to discover several localities of vertebrate fossils. The geological condition will be reported in another paper' and need not be repeated there. Most of the fossils were derived from the hill     

OBITUARY NOTE ON MR.S.W.WANG

The untimely death of Mr.S.W.Wang on Feb.10th 1936 iscertainly a serious loss to the Chinese geology.Although his name is notso well known as others in the geological circle,Mr.Wang has indeedmade remarkable contribution to the study of Chinese crystals and     

Evolution of Ore-Forming Fluids and Ag-Cu Polymetal Mineralization in the Lanping Basin, Yunnan

EVOLUTION OF ORE-FORMING FLUIDS AND Ag-Cu POLYMETAL MINERALIZATION IN THE LANPING BASIN, YUNNAN“KeyProjectforResourcesandEconomics” (95 0 2 0 0 1 0 1)oftheMinistryofLandResources