The International Journal of Ocean and Climate Systems最新文献_第4页

A Wavelet and Neuro-Fuzzy Conjunction Model to Forecast Air Temperature Variations at Coastal Sites 小波与神经模糊联合模型预测沿海地区气温变化

The International Journal of Ocean and Climate Systems Pub Date : 2015-12-01 DOI: 10.1260/1759-3131.6.4.159

S. Karimi, O. Kisi, J. Shiri, Oleg Makarynskyy

引用次数: 6

Numerical Simulation: Hydro-Morphology of Meghna Estuary 梅克纳河河口水文形态的数值模拟

The International Journal of Ocean and Climate Systems Pub Date : 2015-12-01 DOI: 10.1260/1759-3131.6.4.173

M. Uddin, J. Alam, Z. Khan, G. Hasan, R. Alam

{"title":"Numerical Simulation: Hydro-Morphology of Meghna Estuary","authors":"M. Uddin, J. Alam, Z. Khan, G. Hasan, R. Alam","doi":"10.1260/1759-3131.6.4.173","DOIUrl":"https://doi.org/10.1260/1759-3131.6.4.173","url":null,"abstract":"The Meghna Estuary is formed by the combined flows from three great rivers in the south-east Asia; the Ganges, the Brahmaputra and the Meghna. This estuary experiences dynamic hydro-morphological changes due to very high discharge of water and sediment from these three mighty rivers. Erosion and accretion occur simultaneously at very high rates; such that, the flow and sediment discharge through the estuary are the third highest and the highest, respectively, in the world. On the other hand, the tidal current itself is also strongly affected by the dynamic morphology changes. It is thus essential to understand the hydraulic behavior and interactive features of tides and morphology change in the estuary. With this end in view a two dimensional general model of Bay of Bengal was developed under cyclone shelter preparatory study (csps) undertaken by Bangladesh Government and the model was updated later during other projects. The present article focuses on development of model, its set-up, boundary conditions and few calibration results of this two dimensional hydrodynamic and morphology model. The model applications clearly show the variation of the flow structure; their speed and direction separately for monsoon and dry season around the model area which covers the northern part of Bay of Bengal more specifically the Meghna Estuary.","PeriodicalId":105024,"journal":{"name":"The International Journal of Ocean and Climate Systems","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133372268","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: 4

Waves on the Water Surface — Mathematical Models — Part 1 水面上的波浪-数学模型-第1部分

The International Journal of Ocean and Climate Systems Pub Date : 2015-09-01 DOI: 10.1260/1759-3131.6.3.113

V. Shakhin, T. V. Shakhina

引用次数: 2

Waves on the Water Surface — Mathematical Models — Part 2 水面上的波浪-数学模型-第2部分

The International Journal of Ocean and Climate Systems Pub Date : 2015-09-01 DOI: 10.1260/1759-3131.6.3.137

V. Shakhin, T. V. Shakhina

引用次数: 0

Observed Intraseasonal and Interannual Variability of Arabian Sea Warm Pool along the Gulf of Aden to Strait of Malacca shipping Lane during 1951–2010 1951-2010年亚丁湾至马六甲海峡航道阿拉伯海暖池的季节内和年际变化

The International Journal of Ocean and Climate Systems Pub Date : 2015-06-01 DOI: 10.1260/1759-3131.6.2.55

R. Rao, M. Jitendra, R. Sivakumar, S. Ramakrishna

{"title":"Observed Intraseasonal and Interannual Variability of Arabian Sea Warm Pool along the Gulf of Aden to Strait of Malacca shipping Lane during 1951–2010","authors":"R. Rao, M. Jitendra, R. Sivakumar, S. Ramakrishna","doi":"10.1260/1759-3131.6.2.55","DOIUrl":"https://doi.org/10.1260/1759-3131.6.2.55","url":null,"abstract":"All the available historic surface marine meteorological data collected from Voluntary Observing Ships (VOS) in the tropical Indian Ocean during the period 1951–2010, archived by National Centre for Atmospheric Research, Boulder, Colorado, USA are assembled, quality controlled, processed and analyzed. Data for all the meteorological parameters stratified into 4° latitude by 1° longitude boxes, over five day durations, for all the 60 years are quality controlled, averaged and analyzed to portray the observed spatio-temporal evolution of all these parameters as Hovmoller diagrams for the Gulf of Aden to Strait of Malacca shipping lane. Two dimensional machine contouring is carried out with appropriate colour shading intensities to highlight the maxima and minima in the analyzed fields. The observed intraseasonal and interannual variability of these parameters is characterized along this shipping lane. These analyzed distributions amply highlight the observed variability of the surface meteorological parameters both on intraseasonal and interannual time scales during 1951–2010. Composites of SST and other marine meteorological parameters for strong and weak ASWP regimes, for strong and weak monsoon years, for El Nino (+1Y) and La Nina (+1Y) years and for Positive and Negative IOD (+1Y) years are presented.","PeriodicalId":105024,"journal":{"name":"The International Journal of Ocean and Climate Systems","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114993401","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: 1

Observed Variability of Near-Surface Salinity Field on Seasonal and Interannual Time Scales and Its Impact on the Evolution of Sea Surface Temperature of the Tropical Indian Ocean 热带印度洋近地表盐度场在季节和年际时间尺度上的变化及其对海温演变的影响

The International Journal of Ocean and Climate Systems Pub Date : 2015-06-01 DOI: 10.1260/1759-3131.6.2.87

R. Rao

引用次数: 3

Inter-Comparison of Hydrodynamic Models of Gulf of Khambhat 甘巴特湾水动力模式的相互比较

The International Journal of Ocean and Climate Systems Pub Date : 2015-03-01 DOI: 10.1260/1759-3131.6.1.35

J. Satheeshkumar, R. Balaji

引用次数: 6

Statistical Analysis of Non-Stationary Waves off the Savannah Coast, Georgia, USA 美国乔治亚州萨凡纳海岸非平稳波的统计分析

The International Journal of Ocean and Climate Systems Pub Date : 2015-03-01 DOI: 10.1260/1759-3131.6.1.1

Xiufeng Yang

{"title":"Statistical Analysis of Non-Stationary Waves off the Savannah Coast, Georgia, USA","authors":"Xiufeng Yang","doi":"10.1260/1759-3131.6.1.1","DOIUrl":"https://doi.org/10.1260/1759-3131.6.1.1","url":null,"abstract":"The statistical characteristics of short-term wave records collected from a wave buoy deployed off the coast of Savannah, Georgia, USA are analyzed. The statistical distribution of observed surface elevation is derived and compared with theoretical estimations. The minimum length of time series for stationary conditions is specified using a synthetic approach. A new technique that considers the variability of different dimensionless parameters has been introduced to improve the theoretical distributions of wave crests, troughs and heights. The observed distributions of wave crests and troughs are computed and compared with the Rayleigh distribution as well as the Tayfun distribution. The characteristic wave heights of measured data are compared with those estimated from the Boccotti distribution over different time intervals. The empirical estimation of expected maximum wave heights as a function of the number of waves is examined using a statistical approach, and compared with results from both Boccotti and Tayfun models using the newly introduced technique. Conclusions concerning the efficacy and applicability of theoretical distributions to real ocean wave conditions are summarized.","PeriodicalId":105024,"journal":{"name":"The International Journal of Ocean and Climate Systems","volume":"210 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114316527","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: 1

Seasonal and Interannual Variability of Marine Ecosystem in the North Indian Ocean: A Model Evaluation Study 北印度洋海洋生态系统的季节和年际变化:一个模式评估研究

The International Journal of Ocean and Climate Systems Pub Date : 2015-03-01 DOI: 10.1260/1759-3131.6.1.19

M. Sharada, C. Devasena, P. Swathi, M.V. SundaraDeepthi, M.K. ShelvaSrinivasan, K. Yajnik

{"title":"Seasonal and Interannual Variability of Marine Ecosystem in the North Indian Ocean: A Model Evaluation Study","authors":"M. Sharada, C. Devasena, P. Swathi, M.V. SundaraDeepthi, M.K. ShelvaSrinivasan, K. Yajnik","doi":"10.1260/1759-3131.6.1.19","DOIUrl":"https://doi.org/10.1260/1759-3131.6.1.19","url":null,"abstract":"We have investigated the climatological and interannual variability of biogeochemical cycles in the north Indian Ocean with simulations of TOPAZ (Tracers Of Phytoplankton with Allometric Zooplankton) during 1949–2009. Model simulations have been carried out with climatological and interannual fluxes forcings and the results have been evaluated by using the available data from different sources in the Arabian Sea and the Bay of Bengal. The model captures significant spatial and seasonal features in surface chlorophyll and primary productivity observed in satellite data. Seasonal and interannual variations, and profiles of a few of the state variables obtained from the coupled model simulations compare well with the cruise and satellite data at a few stations for many seasons in the Arabian Sea and the Bay of Bengal. We have also studied the spatial, seasonal and interannual variations of sea surface temperature (SST) and surface chlorophyll anomalies in the north Indian Ocean using model simulation results and satellite data. It is seen that a negative surface chlorophyll anomaly correlates well with a positive SST anomaly.","PeriodicalId":105024,"journal":{"name":"The International Journal of Ocean and Climate Systems","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115581381","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: 3

Prediction of Hydrodynamic Characteristics of Quarter Circular Breakwater Using Stepwise Regression 四分之一圆防波堤水动力特性的逐步回归预测

The International Journal of Ocean and Climate Systems Pub Date : 2015-03-01 DOI: 10.1260/1759-3131.6.1.47

R. Goyal, Kriti Singh, A. Hegde, G. Thakur

引用次数: 3