The International Journal of Ocean and Climate Systems最新文献_第8页

Laboratory Measurements of Breaking Wave Impact Pressures on a Slender Cylindrical Member 细长圆柱形构件破碎波冲击压力的实验室测量

The International Journal of Ocean and Climate Systems Pub Date : 2013-09-01 DOI: 10.1260/1759-3131.4.3.151

R. Manjula, S. Sannasiraj, K. Palanichamy

引用次数: 9

Wave Overtopping over Crown Walls and Run-up on Rubble Mound Breakwaters with Kolos Armour under Random Waves 在随机波浪下，科洛斯装甲在王冠墙和碎石丘防波堤上的波浪漫越

The International Journal of Ocean and Climate Systems Pub Date : 2013-06-01 DOI: 10.1260/1759-3131.4.2.125

A. Arunjith, S. Sannasiraj, V. Sundar

引用次数: 1

Artificial Reefs: A Review 人工鱼礁:综述

The International Journal of Ocean and Climate Systems Pub Date : 2013-06-01 DOI: 10.1260/1759-3131.4.2.117

Lokesha, V. Sundar, S. Sannasiraj

引用次数: 25

Using Artificial Neural Networks to Forecast Monthly and Seasonal Sea Surface Temperature Anomalies in the Western Indian Ocean 利用人工神经网络预测西印度洋月和季节海面温度异常

The International Journal of Ocean and Climate Systems Pub Date : 2013-06-01 DOI: 10.1260/1759-3131.4.2.133

S. Mahongo, M. Deo

{"title":"Using Artificial Neural Networks to Forecast Monthly and Seasonal Sea Surface Temperature Anomalies in the Western Indian Ocean","authors":"S. Mahongo, M. Deo","doi":"10.1260/1759-3131.4.2.133","DOIUrl":"https://doi.org/10.1260/1759-3131.4.2.133","url":null,"abstract":"A study implementing Nonlinear Autoregressive with Exogenous Input (NARX) neural network has been undertaken to predict monthly and seasonal SST anomalies in the western Indian Ocean. The study involves a coastal site located along the eastern African seashore, and an oceanic site that lies precisely within the western pole of the Indian Ocean Dipole. Performance of the network is measured by a series of statistical indicators during testing phase (1981–2010), and results are compared with outputs from three other neural networks and a linear system, the Autoregressive Integrated Moving Average with Exogenous Input (ARIMAX) model. The NARX network has provided the best overall performance, but the other four models have also given sufficiently good predictions. The monthly predictions are on average within an error of ±0.09°C for the first 50% and 90% within ±0.22°C. The corresponding errors for the seasonal predictions are ±0.04°C and ±0.09°C, respectively. The RMSE between observations and predictions is about 0.13°C and 0.06°C for the monthly and seasonal SST anomalies, while the average correlation coefficient is about 0.88 and 0.98, respectively.","PeriodicalId":105024,"journal":{"name":"The International Journal of Ocean and Climate Systems","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115770439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 23

Development of an Automated Regional Coupled Atmosphere-Ocean Modeling System for Coastal Kalpakkam Kalpakkam沿海区域大气-海洋耦合自动模拟系统的开发

The International Journal of Ocean and Climate Systems Pub Date : 2013-06-01 DOI: 10.1260/1759-3131.4.2.87

S. Bonthu, K. Sasmal, H. Warrior, Subhendu Maity

引用次数: 5

Shore Protection for a Placer Deposit Rich Beach of the Southwest Coast of India 印度西南海岸富砂矿滩的海岸保护

The International Journal of Ocean and Climate Systems Pub Date : 2013-03-01 DOI: 10.1260/1759-3131.4.1.41

L. S. Nair, V. Sundar, N. Kurian

{"title":"Shore Protection for a Placer Deposit Rich Beach of the Southwest Coast of India","authors":"L. S. Nair, V. Sundar, N. Kurian","doi":"10.1260/1759-3131.4.1.41","DOIUrl":"https://doi.org/10.1260/1759-3131.4.1.41","url":null,"abstract":"The placer deposits dominated Neendakara-Kayamkulam sector along the Kerala coast on the southwest coast of India may be characterized as a dynamic, unstable beach based on shoreline oscillations observed over the past years. Both long-term and short-term shoreline variations can be easily linked directly to a number of factors – both natural and anthropogenic. Of these, activities such as large scale mining for heavy minerals; dredging and construction of hard structures such as breakwaters and groins; have contributed significantly to the changes in shoreline. The coastal hydrodynamics of the area is highly complex because of the variation in shoreline orientation and near shore slope. The present work is an attempt to understand the coastal processes and to identify the factors responsible for the shoreline oscillations by conducting numerical model studies. The studies on the shoreline changes are also carried out as a part of this study in order to identify the critical areas of the shore that need immediate protection. The study shows that the northern part of the study area (barring the 2km stretch lying to the immediate south of the Kayamkulam inlet) has been eroding significantly which requires immediate protection. The proposed shoreline protection measure is to provide detached offshore submerged breakwaters.","PeriodicalId":105024,"journal":{"name":"The International Journal of Ocean and Climate Systems","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124653904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Wave Interaction with a Double Chamber Oscillating Water Column Device 双腔振荡水柱装置的波相互作用

The International Journal of Ocean and Climate Systems Pub Date : 2013-03-01 DOI: 10.1260/1759-3131.4.1.21

R. Wilbert, V. Sundar, S. Sannasiraj

{"title":"Wave Interaction with a Double Chamber Oscillating Water Column Device","authors":"R. Wilbert, V. Sundar, S. Sannasiraj","doi":"10.1260/1759-3131.4.1.21","DOIUrl":"https://doi.org/10.1260/1759-3131.4.1.21","url":null,"abstract":"The principle of oscillating water column within a chamber due to the propagating oscillatory ocean waves being converted into clean energy through wave energy convertor referred to as Oscillating water column (OWC) device is a well proven concept that still remains as one of the most promising alternate sources of energy from the Ocean. The OWC has single column of water oscillation, whereas, Double Chamber Oscillating Water Column (DCOWC) has two chambers of water oscillation. DCOWC is relatively a new concept. In this paper, the performance characteristics of a DCOWC is evaluated through a well-controlled experimental investigation in a wave flume. The conceptual design aspect of DCOWC and its uniqueness compared with the present state of art in wave energy converters (WECs) are explained. The efficiency of the system is assessed by considering the variations in the geometrical dimensions of the system along with the different characteristics of incident waves. The methodology adopted for evaluating the hydrodynamic performance in terms of energy conversion efficiency, the development of additional structural stability and the wave amplification at the mouth are discussed and its significances are highlighted by presenting the results in a dimensionless form. The analysis of the results indicates the feasibility of the DCOWC concept in harnessing energy from the waves.","PeriodicalId":105024,"journal":{"name":"The International Journal of Ocean and Climate Systems","volume":"2016 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122420842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 16

Recent Studies on Wind Seas and Swells in the Indian Ocean: A Review 印度洋风海与涌浪研究进展综述

The International Journal of Ocean and Climate Systems Pub Date : 2013-03-01 DOI: 10.1260/1759-3131.4.1.63

P. V. Ethamony, R. Rashmi, S. Samiksha, V. M. Aboobacker

{"title":"Recent Studies on Wind Seas and Swells in the Indian Ocean: A Review","authors":"P. V. Ethamony, R. Rashmi, S. Samiksha, V. M. Aboobacker","doi":"10.1260/1759-3131.4.1.63","DOIUrl":"https://doi.org/10.1260/1759-3131.4.1.63","url":null,"abstract":"Winds and waves data measured at a few locations along the west coast of India as well as wave model results were analysed to study the wave characteristics in the deep as well as nearshore regions during different seasons. During fair weather season, we can observe distinct and systematic diurnal variation in wave height and wave period, especially, simultaneous increase in wave height and decrease in wave period with increase in local wind speed. This is due to superimposition of wind seas generated by the sea breeze system with the pre-existing swells. The swells observed in the Arabian Sea are from SW direction during SW monsoon season and from SW/SSW and NW directions during both pre-monsoon and post-monsoon seasons. The NW swells which occur during Shamal events show distinct characteristics such as an increase in wave height, decrease in swell period and a common propagation direction (northwest) for wind seas and swells. Also the swells generated at 400 S, propagate in the north Indian Ocean, and enter the Bay of Bengal without affecting the Arabian Sea. Fine resolution winds (say, MM5 or WRF) are necessary to understand the effect of land-sea breeze system on wind-sea generation in the coastal regions. Here, we review the recent work on wind seas and swells in the Indian Ocean and coastal regions that we have carried out using measured wave data and model results.","PeriodicalId":105024,"journal":{"name":"The International Journal of Ocean and Climate Systems","volume":"306 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133183950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 11

Numerical Modeling of Oil Spill Movement along North-West Coast of India Using GNOME 基于GNOME的印度西北海岸溢油运动数值模拟

The International Journal of Ocean and Climate Systems Pub Date : 2013-03-01 DOI: 10.1260/1759-3131.4.1.75

R. Remyalekshmi, A. Hegde

{"title":"Numerical Modeling of Oil Spill Movement along North-West Coast of India Using GNOME","authors":"R. Remyalekshmi, A. Hegde","doi":"10.1260/1759-3131.4.1.75","DOIUrl":"https://doi.org/10.1260/1759-3131.4.1.75","url":null,"abstract":"India is located at a very strategic point with respect to the international commercial sea routes with a large amount of crude oil traffic. Hence, the risk of oil spill occurring in the Indian waters is considerably high. In the present paper, forecasting the movement of a possible crude oil spill of 10,000 barrels at a location of latitude 21° 41′ 48.53′ N and longitude 66° 46′ 41.45″ E, intersection point of two ship routes from Kandla port and Bombay port (Kandla port of India to Yanbu port of Saudi Arabia and Bombay port of India to Ras Tanura port of Saudi Arabia) has been carried out using GNOME (General NOAA Operational Modeling Environment) model developed by Hazardous Materials Response Division (HAZMAT) of the National Oceanic and Atmospheric Administration Office of Response and Restoration (NOAA OR&R) of United States government. The governing equations for horizontal diffusion, evaporation, dissolution, dispersion etc, adopted by GNOME have been presented in the paper. The simulation is carried out for month of September 2011. It is found that the spill possibly takes 10 hours to reach Gujarat coast and 15 hours to reach Maharashtra coast. With this available knowledge, appropriate mitigation measures may be adopted before spill reaches the shores.","PeriodicalId":105024,"journal":{"name":"The International Journal of Ocean and Climate Systems","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114685269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Correlation of Ice-Rafted Detritus in South Atlantic Sediments with Climate Proxies in Polar Ice over the Last Glacial Period 南大西洋沉积物中浮冰碎屑与末次冰期极地冰气候指标的相关性

The International Journal of Ocean and Climate Systems Pub Date : 2013-03-01 DOI: 10.1260/1759-3131.4.1.1

Sharon L. Kanfoush

引用次数: 4