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Impact of the closure of Indonesian seaway on climate: A numerical modeling study

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Chinese Science Bulletin 2003年第S2期48卷 88-93页

作者： YU Yongqiang, ZHOU Zuyi & ZHANG Xuehong 1. LASG, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 10002., china: 2. laboratory of marine geology,{2., shanghai 200092 china Chinese Acad Sci Inst Atmospher Phys LASG Beijing 100029 Peoples R China tongji Univ Lab Marine Geol Shanghai 200092 Peoples R China

Using a global OGCM and its relevant coupledocean-atmosphere GCM with the contemporary, 6 MaBPand 14 MaBP oceanic topography, respectively, a series ofnumerical experiments are implemented in order to investi-gate the effect of the north shift of Australian continent onthe tropical oceanic circulation, especially the formation ofthe western Pacific warm pool. The numerical experimentsof the individual OGCM forced by the modern atmosphericcirculation indicate that the closure of Indonesian passageresults in warming in the tropical Pacific Ocean and coolingin the tropical Indian Ocean; furthermore, it also results inchange in source of the Indonesian Through Flow (ITF) wa-ter, e.g. ITF mainly originates from the south Pacific at 14MaBP, but it mainly originates from the north Pacific *** coupled model shows similar results as the individualOGCM qualitatively.

关键词： Indonesian Through Flow (ITF) Western Pacific Warm Pool Australian Plate Paleo-oceanography.

Microfossils, carbonate lysocline and compensation depth in surface sediments of the northeastern South china Sea

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Acta Oceanologica Sinica 2003年第4期22卷 597-606页

作者： Chen Ronghua1, Xu Jian2. Meng Yi3, Wang Dongjun1 Liu Chuanlian2. Huang Baoqi2. Zhang Fuyuan1 1. Key laboratory of Submarine Geosciences of State Oceanic Administration, Hangzhou 310012.{2. 2. laboratory of marine geology, tongji university, shanghai 200092,{2. 3. Institute of Estuarine and Coastal Research, East{2. Normal university, shanghai 2.0062.{2. Key laboratory of Submarine Geosciences of State Oceanic Administration Hangzhou 310012 China

Based on the quantitative analyses of abundance of planktonic foraminifera, benthic foraminifera, calcareous nannofossils, the ratios of calcareous to siliceous microfossils, and the determination of carbonate contents in the surface sediments of the northeastern South china Sea, it has been found that the carbonate contents, the abundance of planktonic foraminifera and calcareous nannoplankton, and the ratio of calcareous microfossils decrease rapidly while the ratio of the benthic foraminifera to the total foraminiferal fauna, specific value of siliceous microfossils, and the percentage of the agglutinated tests in the benthic foraminiferal fauna increase with the water depth. The results indicate that the microfossils abundance and ratio, and the carbonate content are closely related to the carbonate lysocline and carbonate compensation depth (CCD) in the study area. In addition, the carbonate lysocline and the CCD are different between the southern and northern parts of the South china Sea. Both the lysocline and the CCD are deeper in the south with 2.600 and 3 600 m than in the north with 2.2.0 and 3 400 m, respectively.

关键词： microfossils carbonate lysocline depth carbonate compensation depth (CCD) surface sediments South china Sea (SCS)

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羌塘盆地构造单元划分及含油气远景评价

同济大学学报（自然科学版） 2002年第12期30卷 1462-1467页

作者：杨辉王永涛姚政道吕金海石油大学CNPC物探重大实验室中国石油集团地球物理勘探局河北涿州072751

对 14条近 40 0 0km的大地电磁测深资料进行了一维及二维连续介质反演 .根据反演结果及地面地质资料解释确定了侏罗系、上三叠统底界面海拔高度图以及前泥盆系顶界面海拔高度图。

关键词：羌塘盆地构造单元划分含油气远景评价大地电磁测探

A multi-layer model for early diagenesis

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Chinese Science Bulletin 1997年第16期42卷 1385-1387页

作者： MEI HongmingDepartment of marine geology,{2., shanghai 200092, china Department of marine geology Tongji University Shanghai China

EARLY diagenesis is defined here as a series of physical, chemical and biological reactions operating between depositional particles, porewaters and environmental water medium in the processes of deposition and shallow burial. Early diagenesis can produce geochemical succession within deposits, which can be divided from top to bottom into oxidation zone (OX), sulphate reduction zone (SR) and methanogenesis zone (ME). Part of the reaction

关键词： early diagenesis biogeochemical zone multi-layer model.

Quaternary high-resolution opal record and its paleoproductivity implication at ODP Site 1143,southern South china Sea

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Chinese Science Bulletin 2003年第4期48卷 363-367页

作者： WANG Rujian & LI Jian laboratory of marine {2., MEO, tongji university, shanghai 200092, china laboratory of marine {2. MEO Tongji University Shanghai 200092 China

The correlation of opal content and MAR with oxygen isotopic records of benthonic foraminifera at Site 1143, southern South china Sea indicates that, since about 900 ka, the increasing opal content and MAR during the interglacial periods is inferred to reflect the higher surface productivity, for the intensified summer monsoon during the interglacial periods would result in the enhanced upwelling and nutrient supply. Time-sequence spectral analyses of oxygen isotopic record, opal content and MAR at intervals of 0900 ka reveal that the changes of surface productivity were dominantly forced by the variations of the earth orbital cycles.

关键词：中国南海第四纪蛋白石含量 MAR 古生产力四膜虫沉积物氧同位素

Cycladophora davisiana(Radiolarian)in the Bering Sea during the late Quaternary:A stratigraphic tool and proxy of the glacial Subarctic Pacific Intermediate Water

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Science china Earth Sciences 2005年第10期48卷 1698-1707页

作者： WANG Rujian1 & CHEN Ronghua2.1. State Key laboratory of marine {2., tongji university, shanghai 200092, china 2. The Key laboratory of Submarine Geoscience, State Oceanic Administration, Hangzhou 310012. china tongji university State Oceanic Administration

Cycladophora davisiana (Radiolarian) contents are counted in two cores of the Ber-ing Sea and correlated well with the oxygen isotopic records of ice in the deep core obtained by the Greenland Ice Sheet Project II (GISP 2. and deep-sea sediments (SPECMAP) of the world oceans. Millennial scale climatic events, for example, Younge Dryas and B?lling/Aller?d events, Heinrich1 and Dansgaard-Oeschger1events, recorded by C. davisiana percents are distin-guished from Core B4-2. C. davisiana events b, c1, c2. d, e1 and e2. respectively, corresponding to oxygen isotopic 2.0, 3.1, 3.3, 4.0, 5.1 and 5.3, are identified from Core B2.9. High resolution re-cords of C. davisian are tuned to the oxygen isotopic records in GISP 2.and SPECMAP and the depth-age frameworks are established in the two cores, supplying a stratigraphic base for future paleoceanographic and paleoclimatic studies. High C. davisiana during the glacial periods in the two cores indicate that they can serve as a proxy of the glacial Subarctic Pacific Intermediate Water, which verifies the glacial Subarctic Pacific Intermediate Water brought from the Bering Sea.

关键词： Cycladophora davisiana, stratigraphic tool, YD and B/A events, Heinrich 1 and D/O1 events, proxy of glacial Subarctic Pacific Intermediate Water, late Quaternary, Bering Sea.

Calcium carbonate pump during Quaternary glacial cycles in the South china Sea

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Chinese Science Bulletin 2003年第17期48卷 1862-1869页

作者： LIU Zhifei, XU Jian, TIAN Jun & WANG Pinxian laboratory of marine {2., tongji university, shanghai 200092, china laboratory of marine {2. Tongji University

The preservation and dissolution of calcium carbonate (namely calcium carbonate pump) controls the pH of seawater in global oceans by its buffer effect, and in turn plays a significant role in global changes in atmospheric CO2.concentration. The results from measured carbonate con-tents over the past 2.Ma at ODP Site 1143 in the South china Sea provide high-resolution records to explore the process of the calcium carbonate pump during Quaternary glacial cy-cles. The results indicate statistically that the highest car-bonate accumulation rate leads the lightest d 18O by about 3.6 ka at transitions from glacials to interglacials, and that the strongest carbonate dissolution lags the lightest d 18O by about 5.6 ka at transitions from interglacials to glacials. The calcium carbonate pump releases CO2.to the atmosphere at the glacial-interglacial transitions, but transports atmos-pheric CO2.to deep sea at the interglacial-glacial transitions. The adjustable function of the calcium carbonate pump for the deep-sea 2.CO- concentration directly controls parts of global changes in atmospheric CO2. and contributes the global carbon cycle system during the Quaternary.

关键词：中国南海碳酸钙第四纪冰川旋回海洋钻探图古气候

Postglacial sea-level changes and development stages of fluvial-estuarine system

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Acta Oceanologica Sinica 1993年第4期12卷 573-584页

作者： Li Congxian Department of marine geology and Geophysics,{2., shanghai 200092, china Dept. of marine geology & Geophysics Tongji Univ. Shanghai 200092 China

-On the basis of the data obtained from the investigations on some rivers in china and Australia, the author discusses the spatial and temporal changes of various portions of fluvial-estuarine system during postglacial sea-level rising in present coastal and deltaic areas. The evolution of a fluvial-estuarine system can be divided into four development stages: early transgression, late transgression, stationary and regression. Early transgression brought about filling-in of the paleo-valley formed in low stand of sea level. In response to late transgression the estuaries were created, during the stationary stage the big swamp was developed. The regression led to estuaries to be filled with sediments and then became deltas. At the same locality the fluvial-estuarine system changed with time. In the transgressive period the lower reach of a river changed into an estuary, and then became nearshore area. In the regressive period the nearshore area changed into an estuary , and then became delta.

关键词： Sea-level fluvial-estuarine system postglacial period paleo-valley paleo-interfluve retrogressive aggrada-tion

Paleobiogeography of Ostracoda and Foraminifera in the china sea area

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Acta Oceanologica Sinica 1991年第1期10卷 93-105页

作者： Wang Pinxian and Zhao Quanhong Department of marine geology,{2., shanghai, 200092, china Dept marine geology Tongji Univ Shanghai 200092 China China

The distribution of ostracods and benthonic foraminifers in the china sea area is briefly reviewed from the paleobio-geographic viewpoint in this paper. Three regions can be distinguished in the area on the basis of modern distribution data: Region I (the Huanghai Sea and the Bohai Sea) with cool and temperate forms, Region I (the East china Sea and the northern part of the South china Sea) with subtropical warm-water forms and Region Ⅲ (central and southern parts of the South china Sea) with larger foraminifers and other tropical warm-water forms. The occurrence of Nummulites-Discocyclira fauna in the Eocene deposits of the East china Sea indicates a northward extension of tropical zoogeographical region at the time, whereas the distribution pattern of the Miocene Nephrolepidina-Miogypsiua-Austrotrillina fauna in the South china Sea resembles that of the present larger-foraminiferal fauna. In the South china Sea and Taiwan, a warm-water fauna with Asterorotalia and Pseudorotalia first appeared in late Miocene and then flourished in the Pliocene. Its northward invasion into the Bohai Sea area during late Pleistocene may be related to changes in current system. Many of the endemic foraminiferal and ostracod genera and species ( Sinocytheridea etc. ) in recent coastal faunas probably have originated from the South china Sea, and their occurrence in Japan or Australia may be indicative of ties between these areas during glacial times.

关键词： Paleobiogeography of Ostracoda and Foraminifera in the china sea area