检索结果-南通市图书馆

Catalogue of Polychaete species(Annelida) described from China seas during 2008–2017

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Oceanology and Limnology 2019年第2期37卷 724-735页

作者： WANG Yueyun WANG Chunsheng Key Laboratory of Marine Ecosystem and Biogeochemistry Second Institute of Oceanography State Oceanic Administration

China seas are one of the most diverse regions in the Pacific. Though much eff ort has been made to explore its biodiversity, the polychaetes diversity is still poorly known. A large number of species records are based on ecological investigation rather than taxonomical studies. We update the Polychaete species taxonomicaly described from China coastal waters during 2008–2017 and list them as a catalogue. The catalogue contains 47 species of 32 genera and 17 families, the type depository, type locality and geographic distribution. Some taxonomic problems are present in remarks.

关键词： checklist Annelida Polychaeta taxonomy China seas

Evaluation of Wind Retrieval from Co-Polarization Gaofen-3 SAR Imagery Around China seas

在线全文

学校读者我要写书评

暂无评论

Journal of Ocean University of China 2019年第1期18卷 80-92页

作者： SHAO Weizeng ZHU Shuai SUN Jian YUAN Xinzhe SHENG Yexin ZHANG Qingjun JI Qiyan Marine Science and Technology College Zhejiang Ocean University Physical Oceanography Laboratory/CIMST Ocean University of China and Qingdao National Laboratory for Marine Science and Technology National Satellite Ocean Application Service State Oceanic Administration Beijing Institute of Spacecraft System Engineering

Gaofen-3(GF-3) is the first Chinese space-borne satellite to carry the C-band multi-polarization synthetic aperture radar(SAR). Marine applications, i.e., winds and waves retrieved from GF-3 SAR images, have been operational since January 2017. In this study, we have collected more than 1000 quad-polarization(vertical-vertical(VV); horizontal-horizontal(HH); vertical-horizontal(VH); horizontal-vertical(HV)) GF-3 SAR images, which were acquired around the China seas from September 2016 to September 2017. Wind streaks were visible in these images in co-polarization(VV and HH) channel. Geophysical model functions(GMFs), including the CMOD5N together with polarization ratio(PR) model and C-SARMOD, were used to retrieve winds from the collected co-polarization GF-3 SAR images. Wind directions were directly obtained from GF-3 SAR images. Then, the SAR-derived wind speeds were compared with the measurements at a 0.25? grid from the Advanced Scatterometer on board the Metop-A/B and microwave radiometer WindSAT. Based on the analysis, empirical corrections are proposed to improve the performance of the two GMFs. Results of this study show that the standard deviation of wind speed is 1.63 m s^(-1) with a 0.19 m s^(-1) bias and 1.71 m s^(-1) with a 0.26 m s^(-1) bias for VV-and HH-polarization GF-3 SAR, respectively. Our work not only systematically evaluates wind retrieval by using the two advanced GMFs and PR models but also proposes empirical corrections to improve the accuracy of wind retrievals from GF-3 SAR images around the China seas and thus enhance the accuracy of near real-time operational SAR-derived wind products.

关键词： Gaofen-3 synthetic aperture radar wind China seas

Wave Pressure Acting on V-Shaped Floating Breakwater in Random seas

在线全文

学校读者我要写书评

暂无评论

Journal of Ocean University of China 2015年第6期14卷 975-981页

作者： YU Yang DING Ning LIN Jie HOU Jiajia Institute of Mechanics Chinese Academy of Sciences State Key Laboratory of Hydraulic Engineering Simulation and Safety Tianjin University Institute of Military Transportation Sino-European Institute of Aviation Engineering Civil Aviation University of China Business Department Tianjin Xingang Shipbuilding Heavy Industry Co. Ltd

Wave pressure on the wet surface of a V-shaped floating breakwater in random seas is investigated. Considering the diffraction effect, the unit velocity potential caused by the single regular waves around the breakwater is solved using the finite-depth Green function and boundary element method, in which the Green function is solved by integral method. The Response-Amplitude Operator(RAO) of wave pressure is acquired according to the Longuet-Higgins' wave model and the linear Bernoulli equation. Furthermore, the wave pressure's response spectrum is calculated according to the wave spectrum by discretizing the frequency domain. The wave pressure's characteristic value corresponding to certain cumulative probability is determined according to the Rayleigh distribution of wave heights. The numerical results and field test results are compared, which indicates that the wave pressure calculated in random seas agrees with that of field measurements. It is found that the bigger angle between legs will cause the bigger pressure response, while the increase in leg length does not influence the pressure significantly. The pressure at the side of head sea is larger than that of back waves. When the incident wave angle changes from 0? to 90?, the pressure at the side of back waves decreases clearly, while at the side of head sea, the situation is more complicated and there seems no obvious tendency. The concentration of wave energy around low frequency(long wavelength) will induce bigger wave pressure, and more attention should be paid to this situation for the structure safety.

关键词： random seas V-shaped floating breakwater wave pressure boundary element method spectrum analysis

An overview of 10-year observation of the South China Sea branch of the Pacific to Indian Ocean throughflow at the Karimata Strait

在线全文

学校读者我要写书评

暂无评论

Acta Oceanologica Sinica 2019年第4期38卷 1-11页

作者： Zexun Wei Shujiang Li R.Dwi Susanto Yonggang Wang Bin Fan Tengfei Xu Budi Sulistiyo T.Rameyo Adi Agus Setiawan A.Kuswardani Guohong Fang First Institute of Oceanography Ministry of Natural Resources Laboratory for Regional Oceanography and Numerical Modeling Pilot National Laboratory for Marine Science and Technology (Qingdao) Department of Atmospheric and Oceanic Science University of Maryland Faculty of Earth Sciences and Technology Bandung Institute of Technology Agency for Marine & Fisheries Research Ministry of Marine Affairs and Fisheries

Besides the Indonesian throughflow(ITF), the South China Sea throughflow(SCSTF) also contributes to the water transport from the Pacific to the Indian Ocean. However, this South China Sea(SCS) branch at the Karimata Strait is poorly observed until 2007, even though its importance has been suggested by numerical studies for decades. In this paper, we review the nearly 10-year field measurement in the Karimata Strait by the execution of the projects of "SCS-Indonesian seas Transport/Exchange(SITE) and Impacts on seasonal Fish Migration" and "The Transport, Internal Waves and Mixing in the Indonesian Throughflow regions(TIMIT) and Impacts on Marine Ecosystem", which extend the observations from the western Indonesian seas to the east to include the main channels of the ITF, is introduced. Some major achievements from these projects are summarized.

关键词： South China Sea Indonesian seas Indonesian throughflow(ITF) Karimata Strait South China Sea throughflow

Assessment of Arctic sea ice simulations in CMIP5 models using a synthetical skill scoring method

在线全文

学校读者我要写书评

暂无评论

Acta Oceanologica Sinica 2019年第9期38卷 48-58页

作者： Liping Wu Xiao-Yi Yang Jianyu Hu State Key Laboratory of Marine Environmental Science College of Ocean and Earth Sciences Xiamen University Xiamen 361102 China Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai) Zhuhai 519000 China

The Arctic sea ice cover has declined at an unprecedented pace since the late 20th century. As a result, the feedback of sea ice anomalies for atmospheric circulation has been increasingly evidenced. While climatic models almost consistently reproduced a decreasing trend of sea ice cover, the reported results show a large distribution. To evaluate the performance of models for simulating Arctic sea ice cover and its potential role in climate change, this study constructed a reasonable metric by synthesizing both linear trends and anomalies of sea ice. This study particularly focused on the Barents Sea and the Kara Sea, where sea ice anomalies have the highest potential to affect the atmosphere. The investigated models can be grouped into three categories according to their normalized skill scores. The strong contrast among the multi-model ensemble means of different groups demonstrates the robustness and rationality of this method. Potential factors that account for the different performances of climate models are further explored. The results show that model performance depends more on the ozone datasets that are prescribed by the model rather than on the chemical representation of ozone.

关键词： Arctic sea ice climate model Barents and Kara seas multi-model ensemble mean

High resolution bathymetry of China seas and their surroundings

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2001年第19期46卷 1661-1664页

作者： Yong Wang Houze Xu Jigang Zhan Chinese Acad Sci Inst Geodesy & Geophys Wuhan Peoples R China

Based on the oceanic lithospheric flexure and the worldwide bathymetric data ETOPO5, the high resolution bathymetry of the China seas and their surroundings is computed from altimeter derived gravity anomalies. The new bathymetry obtained by this study is higher resolution and accuracy than the widely used ETOPO5 data, meanwhile it shows clearly the seafloor, the tectonic characteristics and the geodynamical processes in the China seas.

关键词： China seas altimetry gravity anomalies bathymetry.

Atmospheric responses over Asia to sea ice loss in the Barents and Kara seas in mid late winter and early spring:a perspective revealed from CMIP5 data

在线全文

学校读者我要写书评

暂无评论

Advances in Polar Science 2020年第1期31卷 55-63页

作者： HAN Zhe LI Shuanglin CAS Key Laboratory of Regional Climate-Environment for Temperate East Asia Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Nansen-Zhu International Research Center(NZC) Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China China Univercity of Geosciences Wuhan 430074China

This study investigated atmospheric responses in mid late winter and early spring to sea ice loss in the Barents and Kara seas using regressions of the January March mean atmosphere on Barents and Kara sea ice area in November and December.Similar atmospheric circulation responses were obtained from reanalysis data and multimodel ensemble results from the Coupled Model Intercomparison Project Phase 5,i.e.,sea ice anomalies are the dominant factor driving the overlying atmosphere.The results showed that an Arctic Asia dipole structure,with opposite anomalies over the mid-latitudes of Asia and over the adjoining Arctic,appears to be the key atmospheric circulation anomaly influencing the East Asian climate in mid late winter and early spring.

关键词： winter atmospheric circulation Arctic Asia dipole sea ice loss Barents and Kara seas

A NUMERICAL STUDY OF THE WINTERTIME CIRCULATION IN THE BOHAI AND HUANGHAI seas

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Oceanology and Limnology 1993年第2期11卷 149-160页

作者：乐肯堂冯明王岳 Institute of Oceanology Academia Snica Qingdao 266071

The paper presents a numerical two-dimensional model (with a realistic sea basin and wind fields as exter nal forcing) to simulate the basic features of the wintertime circulation in the Bohai and Huanghai (Yellow) seas (BHS) and to show how the circulation can be driven by wind. The main results can be summarized as follows (1) The basic features of the BHS wintertime circulation can be depicted by the wind-driven barotropi’c motion. (2) The traditionally named Huanghai Sea Warm Current (HSWC) is actually generated by the north wind field, at least in winter. (3) The southward coastal current off the Korean west coast plays a more significant role in the southern Huanghai Sea wintertime circulation than traditionally believed. (4) Though the coastal landform and bottom topography play important roles in the wintertime BHS circulation pattern, the wind is a primary forcing.

关键词： drculation Bohai and Huanghai seas wintertime numerical study

On the Circulation Structure and Formation Mechanism of the Cold Water Mass of the Yellow Sea (Ⅰ)——Zero-order Solution and Circulation Structure

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 1993年第12期36卷 1518-1528页

作者：袁业立李惠卿 First Institute of Oceanography State Oceanic Administration Qingdao 266003 PRC

A series of studies have been made on the circulation structure and the responsible mechanisms related to the Cold Water Mass of the Yellow Sea. From the present model governing the nonlinear thermally driven circulation in shallow seas, some complete analytical solutions of temperature and velocity components have been obtained in this paper by solving the coupled equations of motion and heat conduction. The results demonstrate that the wind-induced stirring and the tidal mixing are all responsible for the termal structure formation of Cold Water Mass. The computed vertical convection (u-w) develops only within a thin layer (called "a current shell" here) in the vicinity of thermocline while the deeper layer remains almost motionless. This current structure represents well the maintenance mechanisms of thermocline or the Cold Watermass during the summer.

关键词： thermally driven nonlinear circulation in shallow seas wind stirring tidal mixing "platform" isotherm current shell.