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Ancient Changjiang channel system in the East china Sea continental shelf during the last glaciation

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Science china Earth Sciences 2005年第11期48卷 1972-1978页

作者： LI Guangxue1,2. LIU Yong1, YANG Zigeng3, YUE Shuhong4, YANG Wenda5 & HAN Xibin1 1. College of marine Geo-science, Ocean university of{2., Qingdao 2.6003,{2. 2. Shandong Key laboratory of Sea Floor Resource and Exploration Technique, Qingdao 2.6003,{2. 3. Qingdao Institute of marine geology, Qingdao 2.6071,{2. 4. College of marine Environment, Ocean university of{2., Qingdao 2.6003,{2. 5. First Survey Team of marine geology, shanghai Bureau of Petroleum, shanghai 2.12.8,{2. College of marine Geo-science Ocean University of China Qingdao China Shandong Key laboratory of Sea Floor Resource and Exploration Technique Qingdao China Qingdao Institute of marine geology Qingdao China College of marine Environment Ocean University of China Qingdao China First Survey Team of marine geology Shanghai Bureau of Petroleum Shanghai China

Based on the data of high-resolution seismic profiles, an ancient river channel sys-tem of the last glaciation occurred along the Zhedong and Xihu depression in the southeast of Hupijiao rise. The distribution of the channel fill system shows that the ancient Changjiang River went through the Changjiang depression into the low land plain of the outside continental shelf during the low sea level cycle of the last glaciation. The big channel fill into Okinawa Trough is not found due to the depletion of the river kinetic energy in the low land plain. The river discharge dispersal was of an important role to the dilution of the northern Okinawa Trough sea at that time. Six ancient river channel systems (A―F), which are main distributaries of ancient Changjiang in the East china Sea continental shelf during the last glaciation, may be buried off the modern Changjiang estuary. The distribution of these channels coincides with the zonal elevations in the sea floor.

关键词： last glaciation, continental shelf plain, Changjiang River, ancient channel fill

Warming magnitude of Indonesian Throughflow during the penultimate deglaciation (Termination Ⅱ) and its relationship with climate change in high-latitude regions

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Science Bulletin 2010年第32期55卷 3710-3718页

作者： TIAN CuiCui & TIAN Jun State Key laboratory of marine {2.,tongji university,shanghai 200092,china

The tropical oceans are important source areas for global heat and water vapor transport,and changes in tropical sea surface temperature (SST) will have important impacts on high-latitude and global climate change. It is crucial to establish the precise phase relationship between tropical and high-latitude climate variability to gain insight into the mechanisms of global climate change. Here,we present multi-proxy records across the penultimate deglaciation (Termination Ⅱ) from sediment Core SO18459,which is located in the outflow area of the Indonesian Throughflow (ITF) of the Timor Sea. These proxy records include planktonic and benthic foraminifera δ 18O,planktonic foraminifera G. ruber Mg/Ca-derived SST,and δ18Ow of sea surface water. The Mg/Ca-SST records indicate a warming of 4.1°C in the Timor Sea over Termination Ⅱ,which is in phase with decrease in planktonic and benthic δ18O. Our results suggest that at millennial timescales,climate change of the tropical oceans is synchronous with high-latitude ice volume changes. Furthermore,warming of the Timor Sea is almost simultaneous with warming of the Antarctic,suggesting a rapid heat transfer from the tropics to the Antarctic via the atmosphere and/or ocean circulations. The G. ruber δ18O and SST records of Core SO18459 show a marked YD-like event during Termination Ⅱ,which is probably caused by decrease in Australian rainfall or strengthening of the Western Pacific Warm Pool. However,a similar YD-like event is not observed in East Asian rainfall records. This discrepancy indicates that different tropical climate systems may have different responses to the same forcing,such as El Nio Southern Oscillation. A similar YD-like event is observed in the global benthic foraminiferal δ18O records during Termination Ⅱ,implying teleconnection of millennial scale climate change between the tropical regions and high latitudes.

关键词： Indonesian Throughflow Termination Ⅱ tropic sea surface temperature high-latitude phase relationship

DISTRIBUTION OF ARENACEOUS FORAMINIFERA ALONG china COAST AND ITS CONTROLLING FACTORS

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Chinese Science Bulletin 1989年第22期34卷 1896-1901页

作者：吴乃琴汪品先 Department of marine geology Tongji University Shanghai 200092 PRC

In recent years, foraminiferal faunas began to play an important role in the study of sea level change and coastal evolution in china. Foraminifera are well known to have two groups in terms of the test composition: c... 详细信息

关键词： arenaceous foraminifera pH value coastal zone

Late Quaternary glacial cycle and precessional period of clay mineral assemblages in the Western Pacific Warm Pool

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Science Bulletin 2012年第Z2期 3748-3760页

作者： WU JiaWang,LIU ZhiFei * & ZHOU Chao State Key laboratory of marine {2.,tongji university,shanghai 200092,china

Variability of clay mineral assemblages in the Western Pacific Warm Pool(WPWP) over the past 370 ka shows the prominent glacial-interglacial ***(62.-91%) is the dominant clay mineral,with decreased contents during interglacials while increased in *** contrast,variations in chlorite(4%-2.%),illite(4%-12.),and kaolinite(2.-10%) share a similar pattern with higher contents during interglacials than glacials,mirroring to that of *** results indicate that the smectite-dominated clay minerals derive mainly from the river detrital inputs of New *** glacial-interglacial cycle of clay mineral assemblages well correspond to the fluctuation of sea *** the sea level was low,the river materials can travel more easily across the narrow shelf off the island of New Guinea,inject directly into the subsurface currents flowing westwards,then merge into the Equatorial Undercurrent(EUC),and eventually deposit on the central part of *** periods of the smectite content indicate the intensity of mechanical erosion in its provenance of New Guinea,responding to the river runoff and precipitation,and this could also be linked to the meridional migration of the Intertropical Convergence Zone(ITCZ).

关键词： clay minerals glacial cycle precessional period Intertropical Convergence Zone(ITCZ) late Quaternary Western Pacific Warm Pool(WPWP)

Pleistocene precession forcing of the upper ocean structure variations of the southern South china Sea

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Progress in Natural Science:Materials International 2004年第11期 68-73页

作者： TIAN Jun*, WANG Pinxian and CHENG Xinrong(laboratory of marine {2., tongji university, shanghai 200092, china) laboratoryofmarine{2. TongjiUniversityShanghai200092China

The precession plays a dominant role in driving the tropical monsoon variations. Our high resolution, millennial scale marine isotope records from ODP Site 1143 in the southern South china Sea (SCS) present the detailed history of the upper ocean structure variations over the past 1.56 Ma on glacial/interglacial timescale. The cross spectral analyses between the Earth’s orbital variations and the isotopic differences reveal a high coherency between the East-Asian-monsoon-related thermocline and nutricline variations of the SCS and the precession. The variations of monsoon-related isotopic difference between species also demonstrate periodicities of 11-, 12. and 14- thousand years near semi-precession which originates in the tropics, highlighting the importance of the precession in driving the east Asian monsoon changes.

关键词： South china Sea upper ocean structure precession forcing.

HOH XIL PIGGYBACK BASINS:IMPLICATIONS FOR PALEOGENE SHORTENING OF THE TIBETAN PLATEAU

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地学前缘 2000年第S1期7卷 152-153页

作者： Liu Zhifei 1,2., Wang Chengshan 2. Yi Haishen 2. Liu Shun 2.1 laboratory of marine {2., tongji university, shanghai 200092, china, E\|mail: lzhifei@*** 2.Institute of Sedimentary {2., Chengdu university of Technology, Chengdu

Strong deformed sediments investigated in the Hoh Xil basin may contain detailed records for early Tertiary crustal shortening in northern Tibet (Fig.1A). Sedimentary sequences in the basin consist of the Fenghuoshan Group, the Yaxicuo Group, and the early Miocene Wudaoliang Group from lower to upper. Magnetostratigraphic research has indicated the Eocene to early Oligocene ages for the Fenghuoshan and Yaxicuo Groups (Liu, et al., 2.00). Total 2. lithological sections with 2.487 7m thick were measured spread all over the 101000km\+2.Hoh Xil basin, the largest Tertiary sedimentary basin in the hinterland of the Tibetan plateau, to reveal the prototype basin and its evolution processes. They include 17 sections with 1492. 3m thick of the Fenghuoshan Group, 8 sections with 42.3 5m thick of the Yaxicuo Group, and 4 sections with 12.4 9m thick of the Wudaoliang Group.

关键词： piggyback basin crustal shortening the Hoh Xil basin northern Tibet

Field measurement and analysis of turbulence coherence for Typhoon Nuri at Macao Friendship Bridge

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Science china(Technological Sciences) 2010年第10期53卷 2647-2657页

作者： SONG LiLi1, PANG JiaBin2. JIANG ChengLin3, HUANG HaoHui3 & QIN Peng3 1 Guangzhou Institute of Tropical and marine Meteorology, CMA, Guangzhou 510080, china 2.2., shanghai 200092, china 3 Guangdong Climate Centre, Guangzhou 510080, china Guangzhou Institute of Tropical and marine Meteorology CMA Guangzhou China tongji university Shanghai China Guangdong Climate Centre Guangzhou China

For the purpose of investigating the turbulent and spatial coherent characteristics of strong wind during typhoon landing period,two 3-dimensional ultrasonic anemometer stations were set up 30 m horizontally apart on the Macao Friendship Bridge to caputure the turbulent wind velocities of Typhoon Nuri. Based on the reliable and representative field measured data,the mean wind speed and direction,turbulence intensity,turbulence integral scale,turbulence power spectra,spatial correlation coefficient and coherence function were statistically evaluated. The field measurement analysis have presented the following results: 1) Two anemometer stations provided consistent results. The mean wind speed variation in time domain presented typical M-shape curves. The strong wind (10-minute mean wind speed higher than 8th grade in Beaufort wind scale) direction changed in a big range up to 12.-degrees-angle,indicating the field measurements scoped over the typhoon landing period. 2. The ratio of the longitudinal,lateral and vertical turbulence intensities of the strong wind in the typhoon eye wall region was 1:0.96:0.36. Compared with the code defined ratio 1:0.88:0.5,the lateral component was larger and the vertical component was smaller. 3) The value of integral scale increased when the eye wall of Typhoon Nuri passed over the field measurement site. Before the center of Typhoon Nuri arrived,the integral scale of the strong typhoon wind was about twice compared with that for the non-typhoon wind. 4) The spatial correlation of the turbulent wind,coherence function curve and the decay factor had significant differences at different times during the typhoon process. In the eye wall of the typhoon,the horizontal spatial correlation was relatively strong and horizontally spatial correlation spectrum decayed slower with frequency increase. The minimum regressed coefficient C in coherence function model was 4.67,which is lower than the code defined low limit. The maximum decay factor w

关键词： typhoon field measurement and analysis turbulence characteristics coherence spectral function

从孢粉推测上海地区晚第四纪以来的植被、环境演变

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同济大学学报（自然科学版） 2002年第3期30卷 286-291页

作者：张敏斌张玉兰姜立征华棣同济大学海洋地质与地球物理系上海200092 同济大学海洋地质教育部重点实验室上海200092 华东师范大学河口海岸国家重点实验室上海200062

通过对上海地区斜土路 2.孔晚第四纪地层的孢粉研究 ,划分出了晚第四纪 8个孢粉组合带 ,并结合邻近钻孔孢粉研究资料 ,恢复了该区植被演替、气候波动的六个阶段 ,这种气候波动不仅与世界性气候变化一致 ,而且其波动曲线也与海平面变化... 详细信息

通过对上海地区斜土路 2.孔晚第四纪地层的孢粉研究 ,划分出了晚第四纪 8个孢粉组合带 ,并结合邻近钻孔孢粉研究资料 ,恢复了该区植被演替、气候波动的六个阶段 ,这种气候波动不仅与世界性气候变化一致 ,而且其波动曲线也与海平面变化相吻合 ,从而为本地区进行地层年代划分和对比提供可靠的证据 ,为本地区晚第四纪古植被、古气候。

关键词：上海地区晚第四纪孢粉组合古植被古气候古环境植被演替环境演变

Finite dispersal of a divergent nepheloid plume by internal hydraulic jump in a tropical mountainous river estuary

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Finite dispersal of a divergent nepheloid plume by internal ...