检索结果-南通市图书馆

Interannual Variability of SST,SLA and wind waves in the Hawaii Area and Their Responses to ENSO

Journal of Ocean University of China 2008年第4期7卷 379-384页

作者： CHENG Yongcun XU Qing LIU Yuguang LI Chongyin RONG Zengzui ZONG Haibo XIU Peng YIN Xiaobin Institute of Meteorolog.v PLA University of Science and Technology Nanjing 211101 P. R. China Institute of Space and Earth Information Science The Chinese University of Hong Kong Hong Kong P. R. China Physical Oceanography Laboratonry Ocean University of China Qingdao 266100 P R. China LASG Institute of Atmospheric Physics Chinese Academy of Seiences Beijig 100029 P R. China School of Marine Science UniversiO of Maine Maine 04469 USA National Microwave Remote Sensing Laboratory Center for Space Science and Applied Research Chinese Academy of Sciences Beijing 100080 P R. China

Time series of sea surface temperature （SST）, wind speed and significant wave height （SWH） from meteorological buoys of the National Data Buoy Center （NDBC） are useful for studying the interannual variability and trend of these quantities at the buoy areas. The measurements from 4 buoys （B51001, B51002, B51003 and B51004） in the Hawaii area are used to study the responses of the quantities to El Nino and Southern Oscillation （ENSO）. Long-term averages of these data reflect precise seasonal and climatological characteristics of SST, wind speed and SWH around the Hawaii area. Buoy observations from B51001 suggest a significant warming trend which is, however, not very clear from the other three buoys. Compared with the variability of SST and SWH, the wind speeds from the buoy observations show an increasing trend. The impacts of EI Nifio on SST and wind waves are also shown. Sea level data observed by altimeter during October 1992 to September 2006 are analyzed to investigate the variability of sea level in the Hawaii area. The results also show an increasing trend in sea level anomaly （SLA）. The low-passed SLA in the Hawaii area is consistent with the inverse phase of the low-passed SOI （Southern Oscillation Index）. Compared with the low-passed SOl and PDO （Pacific Decadal Oscillation）, the low-passed PNA （Pacific-North America Index） has a better correlation with the low-passed SEA in the Hawaii area.

关键词： sea surface temperature wind waves ENSO: sea level anomaly

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Directional Spectrum of wind waves: Part Ⅰ- Model and Derivation

引用

Journal of Ocean University of Qingdao 2003年第1期2卷 1-12页

作者： LIUYuguang YANXiao-Hai SUMing-Yang PhysicalOceanographyLaboratory CollegeofMarineEnvironmentOceanUniversityofChinaQingdao266003P.R.China CenterforRemoteSensing GraduateCollegeofMarineStudiesUniversityofDelawareNewarkDE19716USA OceanographyDivision NavalResearchLaboratoryStennisSpaceCenterMS39529USA

A new model on the directional spectrum of wind waves for deep water is proposed based on the statistics of wind waves. This model contains three parameters: the wave age, the inverse spectral bandwidth and the local spectral-peak angular frequency. The inverse spectral bandwidth is a robust parameter for describing the spectral steepness of wind waves. Using the inverse spectral bandwidth parameter, the proposed model can well describe various observations obtained from the open ocean and laboratory tank.

关键词： wind waves directional spectrum spectral bandwidth wave age local spectral-peak angular frequency

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Directional Spectrum of wind waves: Part Ⅱ- Comparison and Confirmation

引用

Journal of Ocean University of Qingdao 2003年第1期2卷 13-23页

作者： LIUYuguang YANXiao-Hai SUMing-Yang PhysicalOceanographyLaboratory CollegeofMarineEnvironmentOceanUniversityofChinaOingdao266003.P.R.China CenterforRemoteSensing GraduateCollegeofMarineStudiesUniversityofDelawareNewarkDE19716.USA OceanographyDivision NavalResearchLaboratoryStennisSpaceCenter，MS39529USA

A model on the directional frequency spectrum of wind waves for deep water is introduced. The comparisons of the proposed model with other existing models show that the proposed model is very close to the JONSWAP model and DHH model for describing the developing waves under the normal spectral bandwidth, and has a better description for the transition of the unidirectional spectrum from ω -4 to ω -5 at a position around 3ω p, i.e., three time the peak frequency. Comparisons also show that the proposed model describes closely both field data measured by a four-frequency radar and a laser-optical sensor, and laboratory data measured by a laser slope gauge and an imaging optical method. The comparisons further demonstrate that the inverse spectral bandwidth as a new wave parameter is robust for describing the spectral steepness. Finally, the formula on the local spectral-peak angular frequency is confirmed using the observed two-dimensional spectra.

关键词： wind waves directional spectrum spectral bandwidth wave age local spectral-peak angular frequency

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Responses of alkaline phosphatase activity to wind-driven waves in a large,shallow lake:Implications for phosphorus availability and algal blooms

引用

Journal of Environmental Sciences 2021年第1期33卷 143-150页

作者： Jian Zhou Xiaoxia Han Boqiang Qin Guangwei Zhu Taihu Laboratory for Lake Ecosystem Research State Key Laboratory of Lake Science and EnuvironmentNanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjing 210008China Laboratory and Analytical Testing Center Jiangsu Academy of Enuironmental Sciences Environmental Technology Co.LtdNanjing 210036China School of Geography and Ocean Science Nanjing UniversityNanjing 210023China

Phosphorus is a vital nutrient for algal growth,thus,a better understanding of phosphorus availability is essential to mitigate harmful algal blooms in *** waves are a ubiquitous characteristic of lake ***,its effects on the cycling of organic phosphorus and its usage by phytoplankton remain poorly elucidated in shallow eutrophic lakes.A mesocosm experiment was carried out to investigate the responses of alkaline phosphatase activity fractions to wind waves in large,shallow,eutrophic Lake *** showed that wind-driven waves induced the release of alkaline phosphatase and phosphorus from the sediment,and dramatically enhanced phytoplanktonic alkaline phosphatase ***,compared to the calm conditions,bacterial and dissolved alkaline phosphatase activity decreased in wind-wave ***,the gene copies of Microcystis phoX increased but bacterial phoX decreased under wind-wave *** ecological effects of these waves on phosphorus and phytoplankton likely accelerated the biogeochemical cycling of phosphorus and promoted phytoplankton production in Lake *** study provides an improved current understanding of phosphorus availability and the phosphorus strategies of plankton in shallow,eutrophic lakes.

关键词： wind waves Alkaline phosphatase activity Phosphorus Plankton phoX

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Fine Sediment Resuspension Dynamics in Moreton Bay

引用

China Ocean Engineering 2007年第2期21卷 267-280页

作者：尤再进尹宝树 Coastal Unit NSW Department of Natural ResourcesPO Box 2185Dangar NSW 2309Australia Institute of Oceanology Chinese Academy of Sciences

A comprehensive field study has been undertaken to investigate sediment resuspension dynamics in the Moreton Bay, a large semi-enclosed bay situated in South East Queensland, Australia. An instrumented tripod, which housed three current meters, three OBS sensors and one underwater video camera, was used to collect the field data on tides, currents, waves and suspended sediment concentrations at four sites （Sites 1, 2, 4, and 5） in the bay. Site 1 was located at the main entrance, Site 2 at the central bay in deep water, and Sites 4 and 5 at two small bays in shallow water. The bed sediment was fine sand （ d5o = 0.2 ram） at Site 1, and cohesive sediment at the other three sites. Based on the col- lected field data, it is found that the dominant driving forces for sediment resuspension are a combination of ocean swell and tidal currents at Site 1, tidal currents at Site 2, and wind-waves at Sites 4 and 5. The critical bed shear stress for cohesive sediment resuspension is determined as 0.079 Pa in unidirectional flow at Site 2, and 0. 076 Pa in wave-induced oscillatory flow at Site 5.

关键词： Sediment resuspension Critical bed shear stress wind waves ocean swell

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Variation of drag coefficient with wind wave development

引用

Science China Mathematics 1998年第8期41卷 859-868页

作者：张子范李家春 Institute of Mechanics Chinese Academy of Sciences Beijing China

Turbulent air flows over developing wind waves in the air-sea boundary layer are numerically simulated without considering wave breaking. Influences of wind waves on air flows are considered using a model of significant wave and surface roughness, with a formula proposed for calculating the surface roughness. κ-ε model is adopted to simulate turbulent flows. The results of the drag coefficient and turbulence characteristics agree well with the observations.

关键词： drag coefficient wind waves κ-ε turbulence model air-sea interaction

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

New Interpretation of Dependence of wind Stress on Wave State

引用

China Ocean Engineering 2003年第4期18卷 577-588页

作者： ZHAO Dong-liang(赵栋梁) LOU An-gang(娄安刚) Institute of Physical Oceanography Ocean University of China Qingdao 266003 China College of Environmental Science and Engineering Ocean University of China Qingdao266003 China

Based on observations from buoys, it is found that the wave age is well correlated with the nondimensional wave height, and this correlation is best described by a 3/5-power law. This similarity law is valid in the cases of wind waves as well as swells under natural sea states. On the basis of the 3/5-power law combined with the well-known 3/2-power law I it is shown that the wave-induced wind stress increases rapidly with wave age, indicating that the traditional observations or analytic techniques have only given the turbulent Reynolds stress induced by short wind waves, but excluded the long-wave-induced wind stress. The latter constitutes a small fraction to the total wind stress when the wave age is smaller than 1.0. The increase of sea-surface roughness with wave age can be attributed to wave breaking.

关键词： wind stress drag coefficient wave age wind waves

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A new model to estimate significant wave heights with ERS-1/2 scatterometer data

引用

Chinese Journal of Oceanology and Limnology 2009年第1期27卷 112-116页

作者：过杰何宜军 William Perrie 申辉储小青 Institute of Oceanology Chinese Academy of Sciences Key Laboratory of Ocean Circulation and Wave CAS Graduate School of the Chinese Academy of Sciences Bedford Institute of Oceanography

A new model is proposed to estimate the significant wave heights with ERS-1/2 scatterometer data. The results show that the relationship between wave parameters and radar backscattering cross section is similar to that between wind and the radar backscattering cross section. Therefore, the relationship between significant wave height and the radar backscattering cross section is established with a neural network algorithm, which is, if the average wave period is ≤7s, the root mean square of significant wave height retrieved from ERS-1/2 data is 0.51 m, or 0.72 m if it is >7s otherwise.

关键词： scatterometer significant wave height neural networks wind waves swell

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Analysis of Energy Overshoot of High Frequency waves with Wavelet Transform

引用

China Ocean Engineering 2000年第3期15卷 371-374页

作者：文凡 Physical Oceanography Laboratory Ocean University of Qingdao Qingdao 266003 China

A study is made on the overshoot phenomena in wind-generated waves. The surface displacements of time-growing. waves are measured at four fetches in a wind wave channel. The evolution of high frequency waves is displayed with wavelet transform. The results are compared with Sutherland's. It is found that high frequency wave components experience much stronger energy overshoot in the evolution. The energy of high frequency waves decreases greatly after overshoot.

关键词： wind waves overshoot wavelet transform

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

COMPUTATIONS OF wind-WAVE COUPLING

引用

Annals of Differential Equations 2010年第3期26卷 322-331页

作者： Tobias Kukulka Tetsu Hara College of Earth Ocean and Envirnment University of Delaware Newark DE 19716 USA Graduate School of Oceanography University of Rhode Island Narragansett RI 02882 USA

We present numerical computations of a new wind-wave coupling theory that is governed by a system of nonlinear advance-delay differential equations (NLADDE). NLADDE are functional differential equations for which the derivative of an unknown function depends nonlinearly on the past (delayed), present, and future (advanced) values of the unknown function (if time is the independent variable). A practical numerical method for solving NLADDE is implemented, based on a collocation method. The method is tested for two problems with known analytic solutions and is shown to be numerically convergent. Numerical solutions to the coupled wind and wave problem reveal estimates of the wave height spectrum, the distribution of breaking waves (both depend on wave scale), as well as the vertical air-side profiles of turbulent stress and wind speed.

关键词： nonlinear advance-delay differential equations collocation method functional differential equations wind waves

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：