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The bacterial diversity in surface sediment from the South china sea

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Acta Oceanologica Sinica 2010年第4期29卷 98-105页

作者： WANG Guanghua DONG Junde LI Xiang SUN Huimin key laboratory of Marine Bio-resources Sustainable Utilization South China Sea Institute of Oceanology Chinese Academy of Science Guangzhou 510301 China Graduate University of chinese academy of Science Beijing 100049 China

16S rDNA sequencing results from this study and literatures demonstrate that sediment bacteria in the South china sea （SCS） were very diverse,which contained 2. of the 2. phyla of bacteria investigated from marine sediment,however,it was very imbalance among *** bacterial diversity from 15 samples which covered a wide range of sediment types from 2. to 3 888 m in depth was studied in DGGE （denature gradient gel electrophoresis） in this *** DGGE results indicate that both sediment bacterial diversity and diversity difference among stations were *** representative and differential fingerprints among samples were recovered and sequenced,phylogenetic analysis indicates that they may belong to Proteobacteria （α-,β-,γ-,δ-,ε-）,Planctomycetes,Firmicutes,Chloroflexi,Acidobacteria,Actinobacteria,Nitrospirae,Gemmatimonadetes,candidate division WS3 and so on,of which,Gemmatimonadetes and candidate division WS3 bacteria were first detected in SCS *** study also shows that bacterial diversity analysis based on DGGE was more potential than traditional 16S rDNA clone library in multiple sample analysis.

关键词： bacterial diversity DGGE marine sediment South china sea

Modeling of Deep-water Paleo-topography of the Baiyun Sag,Northern South china sea

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Modeling of Deep-water Paleo-topography of the Baiyun Sag,No...

sea-salt aerosol transport patterns over the Northern Hemisphere inferred from two subarctic ice core records

第二届大陆边缘构造和资源国际学术研讨会

作者： Di Zhou XH Hehua cas key {2. of marginal sea geology,South china sea institute of Oceanology,guangzhou 510301

While the exploration of deep-water petroleum resources has been a successful experience for decades in other parts of the world,it is only starting in the northern South china sea off South *** first target is the Ba...

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Science china Earth sciences 2005年第4期48卷 576-584页

作者： YAN Yuping1,2. KANG Shichang2.3,5, SUN Junying4,5, Paul A. Mayewski2.& QIN Dahe5 1. National Climate Center, china Meteorological Administration, Beijing 100081, china 2. Climate Change {2., University of Maine, Orono, ME 04469, USA 3. {2. of Tibetan Plateau Research, chinese academy of sciences, Beijing 100085, china 4. chinese academy of Meteorological sciences, Beijing 100081, china 5. key {12. of Ice Core and Cold Regions Environment, Cold and Arid Environmental and Engineering Research {2., chinese academy of sciences, Lanzhou 730000, china 1. National Climate Center China Meteorological Administration 100081 Beijing China 2. Climate Change institute University of Maine 04469 Orono ME USA 3. institute of Tibetan Plateau Research Chinese Academy of Sciences 100085 Beijing China 4. key laboratory of Ice Core and Cold Regions Environment Cold and Arid Environmental and Engineering Research Institute Chinese Academy of Sciences 730000 Lanzhou China 5. chinese academy of Meteorological {2. 100081 Beijing China

Atmospheric circulation reconstruction based on glaciochemical records requires knowledge of chemical concentration controls, such as source, transport pathway and strength. To gain insight into these processes, the relationships between glaciochemical records from two Northern Hemisphere sites (Mt. Logan in Yukon Territory and 2.D in southern Greenland) and instrumental sea level pressure (SLP) series are investigated. Calibrations between Mt. Logan sea-salt sodium (ssNa+) concentration and SLP series show that ssNa+ concentrations are closely correlated with the autumntime (SON) Aleutian Low and the summertime (JJA) North Pacific Subtropical High. Both the deepened Aleutian Low and enhanced North Pacific Sub- tropical High strengthen the transport of sea-salt aerosols from the North Pacific to the Mt. Logan region. Calibrations between 2.D ssNa+ concentrations and SLP series indicate that ssNa+ concentrations are closely related to the wintertime (Jan.) Icelandic Low. A deepening of the Icelandic Low strengthens winter storms and frequent cyclogenesis over the North Atlantic and pushes more sea-salt laden air masses to the Greenland ice sheet. Therefore, ice core ssNa+ records from the Mt. Logan region can be considered as a proxy for reconstructing the au- tumntime Aleutian Low and summertime North Pacific Subtropical High, and the ssNa+ records from Greenland ice core (2.D) may provide a proxy for reconstructing the wintertime Icelandic Low.

关键词： sea-salt aerosol, ice core records, sea level pressure, subarctic regions.

Chemometric study of spatial variations of environmental and ecological characteristics in the Zhujiang River (Pearl River) Estuary and adjacent waters

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Acta Oceanologica Sinica 2011年第4期30卷 60-74页

作者： SONG Xingyu HUANG Liangmin ZHANG Jianlin YIN Kedong LIU Sheng TAN Yehui YIN Jianqiang key laboratory of Marine Bio-resources Sustainable Utilization South China Sea Institute of Oceanography Chinese Academy of Sciences Guangzhou 510301 China State key laboratory of Oceanography in the Tropics Guangzhou 510301 China Australian Rivers institute Griffith University Brisbane 4111 Australia

Chemometric approach based on principal component analysis（PCA） was utilized to examine the spatial variances of environmental and ecological characteristics in the Zhujiang River（Pearl River） Estuary and adjacent waters（ZREAW） in the South china sea. The PCA result shows that the ZREAW can be divided into different zones according to the principal components and geographical locations of the study stations,and indicates that there are distinct regional variances on environmental features and the corresponding phytoplankton biomass and community structures among different areas. The spatial distribution of ecological features was implied to be influenced by various degrees of the different water resources,such as the Pearl River discharges,the coastal current and the oceanic water from the South china sea. The variation of the biomass maximum zone and the complex impacts on the spatial distributions of phytoplankton biomass and production were also evaluated.

关键词： principal component analysis spatial variations environmental conditions ecological distribution phytoplankton Zhujiang River (Pearl River) Estuary

Mesozoic subduction-accretion zone in northeastern South china sea inferred from geophysical interpretations

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Science china Earth sciences 2006年第5期49卷 471-482页

作者： ZHOU Di1, WANG Wanyin2. WANG Jialin3, PANG Xiong4, CAI Dongsheng5 & SUN Zhen1 1. key laboratory of {2. sea geology, South china sea institute of Oceanology, chinese academy of sciences, Guang- zhou 510301, china 2. College of Geological and Topographical Engineering, Chang’an University, Xi’an 710054, china 3. key laboratory of Marine geology, Tongji University, Shanghai 2.0092. china 4. china National Offshore Oil Co. Limited – Shenzhen Branch, Shenzhen 518067, china 5. china National Offshore Oil Co. Limited – Research Center, Beijing 10002., china 1. key laboratory of {2. sea geology South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou 510301 China 2. College of Geological and Topographical Engineering Chang’an University Xi’an 710054 China 3. key laboratory of Marine {2. Tongji University Shanghai 200092 China 4. china National Offshore Oil Co. Limited — Shenzhen Branch Shenzhen 518067 China 5. china National Offshore Oil Co. Limited — Research Center Beijing 100027 China

A segment of Mesozoic subduction-accretion zone was inferred across thenortheastern South china sea at approximately NE450 orientation. Basic evidence includes thefollowing: A belt of peek gross horizontal Bouguer gravity gradient (PGHGBA) is comparable in sizeand intensity to that of the Manila subduction-accretion zone. A belt of high positive magneticanomalies appears to the north and sub-parallel to the PGHGBA, representing the volcanic ar{2.sociated to the subduction zone. The PGHGBA crosses obliquely both Cenozoic structures and presentseafloor topography, indicating a pre-Cenozoic age. The segment is offset left-laterally byNW-running strike-slip faults, in concord with the Mesozoic stress field of South china. Inaddition, the existence of the subduction zone is supported by wide-angle seismic data obtained indifferent years by different institutions. At approximate localities, a north-dipping ramp of Mohosurface is indicated by records of ocean-bottom seismometers, and a strong reflector about 8 kmbeneath the Moho reflector is indicated by both OBS and long-cable seismic records. Theidentification of a segment of Mesozoic subduction zone in NE South china sea fills nicely the gapof the Great Late Mesozoic Circum SE Asia Subduction-acrretion Zone, which extended from Sumatra,Java, SE Kalimantan to N Palawan, and from Taiwan, Ryukyu to SW Japan.

关键词： Mesozoic, subduction zone, SE Asia, NE South china sea, geophysics.

The Rifting Structures from Shelf to Slope and Their Hydrocarbon Potential

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The Rifting Structures from Shelf to Slope and Their Hydroca...

Quantitative Evaluation of the sea-level Drop at the End-Permian: Based on Reefs

第二届大陆边缘构造和资源国际学术研讨会

作者： Sun Zhen Zhou Di Sun Longtao ZhangYunfan cas key {2. of the marginal sea geology South china sea institute of Oceanology guangzhou 510301 china

＜正＞According to the deformation style on the northern continental margin of the South china sea and the analogue modeling experiments,the rifting structures of the upper crust varied greatly along with its distance...

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Acta Geologica Sinica(English Edition) 2003年第1期77卷 95-102页

作者： WU Yasheng and FAN Jiasong institute of geology and Geophysics,{2., Beijing 10002. chinese Acad Sci Inst Geol & Geophys Beijing 100029 Peoples R China

The amplitude of pre-Quaternary sea level drop, H, can be calculated by usingthe formula H = D + To, where To is the original thickness from the top of the tidal deposits onthe reef core to the bottom of the tidal deposits on the reef front, or to the bottom of the ancientmeteoric vadose zone, or to the edge of the mixed-water dolostone zone. The identity and similaritybetween the sea-level drop amplitudes calculated from different reefs far away from each otherindicates that such sea-level changes are eustatic rather than relative changes. Evidence of anend-Permian sea-level drop has been found on the Changxingian (i.e. the end of the Palaeofusulinazone) reefs at Ziyun in South china, including algal laminated deposits, sabkha-related dolostone,desiccation cracks, dissolution collapse breccia. According to calculation based on the meteoricdissolution zone of the reef-core sequence at Ziyun, Guizhou province, the amplitude of thesea-level drop at the end-Permian is about 89.3 m. Calculation via the dolomitized upper part of theChangxingian reef in Lichuan, Hubei Province, yields an 88.9 m amplitude of the sea-level drop atthe end-Permian. Comparison shows that the sea-level drop recorded in the two distantly locatedreefs may be of eustatic type. So the amplitude of the sea level drop of the Tethys sea at theend-Permian might be at least 89.3 m.

关键词： sea-level drop eustatic reef Permian Changxingian

Vortex genesis over the Bay of Bengal in spring and its role in the onset of the Asian Summer Monsoon

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Science china Earth sciences 2011年第1期54卷 1-9页

作者： WU GuoXiong1, GUAN Yue1,2. WANG TongMei3, LIU YiMin1, YAN JingHui4 & MAO JiangYu1 1 State key laboratory of Numerical Modeling for Atmospheric {2. and Geophysical Fluid Dynamics (LASG), institute of Atmospheric Physics, chinese academy of sciences, Beijing 10002., china 2.raduate University of chinese academy of sciences, Beijing 100049, china 3Department of Atmospheric Science, Sun Yat-Sen University, guangzhou 5102.5, china 4National Climate Center, china Meteorological Administration, Beijing 100080, china 1. State key laboratory of Numerical Modeling for Atmospheric {2. and Geophysical Fluid Dynamics (LASG) Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China2. Graduate University of Chinese Academy of Sciences Beijing 100049 China3. Department of Atmospheric Science Sun Yat-Sen University Guangzhou 510275 China4. National Climate Center China Meteorological Administration Beijing 100080 China

Physical processes associated with onset of the 1998 Asian summer monsoon were examined in detail using multi-source datasets. We demonstrated that strong ocean-atmosphere-land interaction in the northern Indian Ocean and tropical Asian area during spring is a fundamental factor that induces the genesis and development of a monsoon onset vortex over the Bay of Bengal (BOB), with the vortex in turn triggering onset of the Asian summer monsoon. In spring, strong surface sensible heating over India and the Indochina Peninsula is transferred to the atmosphere, forming prominent in situ cyclonic circulation, with anticyclonic circulations over the Arabian sea and northern BOB where the ocean receives abundant solar radiation. The corresponding surface winds along the North Indian Ocean coastal areas cause the ocean to produce the in situ offshore currents and upwelling, resulting in sea surface temperature (SST) cooling. With precipitation on the Indochina Peninsula increasing from late April to early May, the offshore current disappears in the eastern BOB or develops into an onshore current, leading to SST increasing. A southwest-northeast oriented spring BOB warm pool with SST >31°C forms in a band from the southeastern Arabian sea to the eastern BOB. In early May, the Somali cross-equatorial flow forms due to the meridional SST gradient between the two hemispheres, and surface sensible heat over the African land surface. The Somali flow overlaps in phase with the anticyclone over the northern Arabian sea in the course of its inertial fluctuation along the equator. The convergent cold northerlies on the eastern side of the anticyclone cause the westerly in the inertial trough to increase rapidly, so that enhanced sensible heat is released from the sea surface into the atmosphere. The cyclonic vorticity forced by such sensible heating is superimposed on the inertial trough, leading to its further increase in vorticity strength. Since atmospheric inertial motion is destr

关键词： air-sea interaction spring BOB warm pool monsoon onset vortex inertial oscillation Asian summer monsoon onset

The characteristics of sea fog with different airflow over the Huanghai sea in boreal spring

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Acta Oceanologica Sinica 2010年第4期29卷 3-12页

作者： HUANG Jian WANG Xin ZHOU Wen HUANG Huijun WANG Dongxiao ZHOU Faxiu institute of Tropical and Marine Meteorology China Meteorological Administration Guangzhou 510080 China Guy Carpenter Asia-Pacific Climate Impact Centre School of Energy and Environment City University of Hong Kong Hong Kong China cas key {2. of tropical marine environmental dynamics South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou 510301 China Department of meteorology Ocean University of China Qingdao 262003 China

Using the observations from ICOADS datasets and contemporaneous NCEP/NCAR reanalysis datasets during 1960-2.02.the study classifies the airflows in favor of sea fog over the Huanghai （Yellow） sea in boreal spring （April-May） with the method of trajectory analysis,and analyzes the changes of proportions of warm and cold sea fogs along different paths of *** to the heat balance equation,we investigate the relationships between the marine meteorological conditions and the proportion of warm and cold sea fog along different airflow *** major results are summarized as follows.（1） sea fogs over the Huanghai sea in spring are not only warm fog but also cold *** proportion of warm fog only accounts for 44% in April,while increases as high as 57% in May.（2. Four primary airflow paths leading to spring sea fog are *** are originated from the northwest,east,southeast and southwest of the Huanghai sea,*** occurrence ratios of the warm sea fog along the east and southeast airflow paths are high of 55% and 70%,while these along the southwest and northwest airflow paths are merely 17.9% and 50%.（3） The key physical processes governing the warm/cold sea fog are heat advection transport,longwave radiation cooling at fog top,solar shortwave warming and latent heat flux between airsea interfaces.（4） The characteristics of sea fog along the four airflow paths relate closely to the conditions of water vapor advection,and the vertical distribution of relative humidity.

关键词： spring sea fog over the Huanghai sea airflow paths water vapor flux heat advection vertical distribution of water vapor