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Articles 331 - 358 of 358
Full-Text Articles in Oceanography and Atmospheric Sciences and Meteorology
Integrated Numerical Model For The Simulation Of The T.S. Taipei Oil Spill, Cheng-Di Dong, Thi-Hong-Hanh Nguyen, Tien-Hung Hou, Chia-Cheng Tsai
Integrated Numerical Model For The Simulation Of The T.S. Taipei Oil Spill, Cheng-Di Dong, Thi-Hong-Hanh Nguyen, Tien-Hung Hou, Chia-Cheng Tsai
Journal of Marine Science and Technology–Taiwan
In this study, two freely available models, the hydrodynamic model Princeton Ocean Model (POM) and the oil spill model OpenOil, are integrated to simulate the T.S. Taipei oil spill that occurred on March 10, 2016. In these models, the amount of oil spilled into the sea is distributed among a large number of small and equal mass particles. Meteorological data such as wind velocity, air surface temperature, and current data from the POM are used as inputs. The Lagrangian particle traction with prescribed advection and reaction is used to model the spilled oil. The results are compared with in-situ observations …
Assessment On Long-Term Fluctuations Of Runoff And Its Climate Driving Factors, Hong-Bo Zhang, Wen-Cheng Huang, Qiu-Yi Xi, Bin Wang, Tian Lan
Assessment On Long-Term Fluctuations Of Runoff And Its Climate Driving Factors, Hong-Bo Zhang, Wen-Cheng Huang, Qiu-Yi Xi, Bin Wang, Tian Lan
Journal of Marine Science and Technology–Taiwan
The Jing River is the largest tributary of the Wei River in northwestern China. Studying the long-term characteristics of its runoff is of significance to water resources planning and management as well as the design of hydraulic engineering activities at the local and Wei River basin scales in the present and future. Several methods were utilized in this study to investigate the long-term fluctuations in runoff for the Jing River, including continuous wavelet analysis, the HilbertHuang transform and correlational analysis. Furthermore, the responses of runoff to various climatic and meteorological factors including precipitation, evaporation, solar activity and the El Niño-Southern …
The Tsunami Of March 11, 2011 As Observed By The Network Of Tide Gauges Of French Polynesia, Jean-Pierre Barriot, Jonathan Serafini, Lydie Sichoix, Dominique Reymond, Olivier Hyvernaud
The Tsunami Of March 11, 2011 As Observed By The Network Of Tide Gauges Of French Polynesia, Jean-Pierre Barriot, Jonathan Serafini, Lydie Sichoix, Dominique Reymond, Olivier Hyvernaud
Journal of Marine Science and Technology–Taiwan
We present here the network of tide gauges spanning French Polynesia, and the set of records made by this network of the tsunami wave of March 11, 2011 (Tōhoku earthquake). We also outline the least-squares procedure used to separate the tsunami signal from the oceanic tides signal.
Interannual Variability Of Wintertime Sea Surface Temperatures In The Eastern Taiwan Strait, Mu-Tun Tzeng, Kuo-Wei Lan, Jui-Wen Chan
Interannual Variability Of Wintertime Sea Surface Temperatures In The Eastern Taiwan Strait, Mu-Tun Tzeng, Kuo-Wei Lan, Jui-Wen Chan
Journal of Marine Science and Technology–Taiwan
Using Advanced Very High Resolution Radiometer (AVHRR) sea surface temperatures (SSTs) at a 1.1-km spatial resolution, we investigated the long-term SST variability in winter in the eastern Taiwan Strait (TS) in 1995~2008. We performed an empirical orthogonal function (EOF) analysis of spatial and time series variances for 15-day mean images. The first three modes in the EOF analysis respectively accounted for 25.9%, 16.61% and 4.59% of variances. In the first mode, the spatial amplitude showed positive values in the northeastern TS and negative values south of Chang-Yuen Rise (CYR). This suggests that warmer water occurred south of the CYR and …
Quantataive Analysis Of Relationship Between Alos Palsar Backscatter And Forest Stand Volume, Choen Kim
Quantataive Analysis Of Relationship Between Alos Palsar Backscatter And Forest Stand Volume, Choen Kim
Journal of Marine Science and Technology–Taiwan
To estimate forest stand volume, topographic effects should be considered in Synthetic Aperture Radar (SAR) data processing, because most forests are located on mountainous areas in Korea. This paper shows how the effects on the ALOS Phased-Array L-Band SAR (PALSAR) backscatter in Kwangneung Experiment Forest can be reduced by gammanought γ 0 . Regardless of coniferous and deciduous forests, the gammanought γ 0 values are always lower compared to the sigmanought σ0 values at HH and HV polarization for 58 standwise tree volume of the fore-slope (here, the west-facing slope) and are always higher in case of far-slope (here, east-facing …
A Geomorphological Model For Landslide Detection Using Airborne Lidar Data, Jin-King Liu, Kuo-Hsin Hsiao, Peter Tian-Yuan Shih
A Geomorphological Model For Landslide Detection Using Airborne Lidar Data, Jin-King Liu, Kuo-Hsin Hsiao, Peter Tian-Yuan Shih
Journal of Marine Science and Technology–Taiwan
This study analyzes multi-temporal LiDAR data of high accuracy and high resolution by installing a geomorphometric model for extracting landslides. First, two sets of LiDAR data were acquired for before and after a heavy rainfall event. The landslides which took place from 2005 to 2009 were classified automatically by satellite images, and subsequently the landslides were interpreted and edited manually. Geomorphometric parameters including slope, curvature, OHM, OHM roughness, and topographic wetness index were then extracted using stencils of landslide polygons overlaid on respective thematic maps derived from LiDAR, DEM and DSM. The ranges of every parameter were derived from the …
Evaluating The Uncertainty Of The Population Growth Parameter Estimates Of Larval Anchovy In The Southwestern Waters Of Taiwan Using Monte Carlo Simulations, Sheng-Ping Wang, Ming-An Lee, Wen-Yu Chen
Evaluating The Uncertainty Of The Population Growth Parameter Estimates Of Larval Anchovy In The Southwestern Waters Of Taiwan Using Monte Carlo Simulations, Sheng-Ping Wang, Ming-An Lee, Wen-Yu Chen
Journal of Marine Science and Technology–Taiwan
To estimate the population growth parameter (maximum sustainable yield, carrying capacity, catchability, the ratio of initial biomass to carrying capacity and model shape parameter) of larval anchovy in the southwestern waters of Taiwan, a non-equilibrium production model was used to fit to historical catch data and standardized CPUE series. The results of standardized CPUE indicated that the sea surface temperature was the most effective variable for explaining the CPUE variation of larval anchovy abundance. This study also evaluated impact of the uncertainty associated with the catch and CPUE data on the model estimations using Monte Carlo simulations. Although the impacts …
Super Long Conductive Channel Production By Impulsar, Victor Victor Apollonov, Nikolay Vlad Pletnev
Super Long Conductive Channel Production By Impulsar, Victor Victor Apollonov, Nikolay Vlad Pletnev
Journal of Marine Science and Technology–Taiwan
The attempts to create a super long conductive channels were taken in order to study the upper atmosphere and to settle special tasks, related to solar energy transmission, accumulated by orbital solar stations. There upon the program of creation of “Impulsar” represents a great interest, as this program in a combination with high-voltage high repetition rate electrical source can be useful to solve the above mentioned problems. The principle of conductive channel production can be shortly described as follows. The “Impulsar”- laser jet engine vehicle - propulsion take place under the influence of powerful high repetition rate pulse-periodic laser radiation. …
Seasonal Prediction Of Climate Extremes For The Pacific: Tropical Cyclones And Extreme Ocean Temperatures, Yuriy Kuleshov, Claire Spillman, Yan Wang, Andrew Charles, Roald De Wit, Kay Shelton, David Jones, Harry Hendon, Catherine Ganter, Andrew Watkins, Jemishabye Apajee, Aurel Griesser
Seasonal Prediction Of Climate Extremes For The Pacific: Tropical Cyclones And Extreme Ocean Temperatures, Yuriy Kuleshov, Claire Spillman, Yan Wang, Andrew Charles, Roald De Wit, Kay Shelton, David Jones, Harry Hendon, Catherine Ganter, Andrew Watkins, Jemishabye Apajee, Aurel Griesser
Journal of Marine Science and Technology–Taiwan
Climate change and climate extremes have a major impact on Australia and Pacific Island countries. Of particular concern are tropical cyclones and extreme ocean temperatures. As a practical response to climate change, through the Pacific Australia Climate Change Science and Adaptation planning Program (PACCSAP), enhanced web-based information tools to provide seasonal forecasts for climatic extremes in the Western Pacific have been developed. Using the dynamical seasonal prediction model POAMA (Predictive Ocean Atmosphere Model for Australia), we aim to improve accuracy of seasonal forecasts of tropical cyclone activity and extreme sea surface temperatures for the Western Pacific. Since the PACCSAP has …
Cold Sea Surface Temperature Near Cheju Island Responding To Strong Cyclonic Wind And Positive Geopotential Tendency Behind A Typhoon Center Along Its Track, Hyo Choi, Mi-Sook Lee, Soo Min Choi
Cold Sea Surface Temperature Near Cheju Island Responding To Strong Cyclonic Wind And Positive Geopotential Tendency Behind A Typhoon Center Along Its Track, Hyo Choi, Mi-Sook Lee, Soo Min Choi
Journal of Marine Science and Technology–Taiwan
The response of sea surface temperature (SST) before and after the passage of Typhoon-18 Songda in the vicinity of Chjeu Island in the southern sea of Korea was investigated using satellite-derived GOES-MCSST (SST), GOES infrared cloud image and a three dimensional WRF-3.0 model with FNL initial meteorological data on September 5 to 8, 2004. On September 4, before the typhoon passed by Cheju Island, the SST extending southwards and eastwards of the island was 27°C. However, after the typhoon passed by the island at 2100 LST, September 7, the SST decreased by 2°C to 25°C. Asymmetrical-cyclonic surface wind generated by …
Rainwater Utilization To Reduce Flooding In Low-Lying Areas Of Taipei City, Taiwan, Andrew Lo
Rainwater Utilization To Reduce Flooding In Low-Lying Areas Of Taipei City, Taiwan, Andrew Lo
Journal of Marine Science and Technology–Taiwan
She-Zih is a low-lying area in Taipei City where the Tanshui River and Keelung River meet. Average elevation is about 2.5 m. Perennial flood events occur very often. The only flood prevention facility is the 6 m levee built around the perimeter to overcome 20-yr flood events. The main cause of the flooding problem is the instantaneous extreme high rainfall events that often exceed the drainage capacity of She-Zih. Current solutions to relieve this water hazard, suggested by the Water Resources Agency, include channel widening and many water pumping installations. At present, all emergency facilities are insufficient to combat unexpected …
Early-Summer Ichthyoplankton Biodiversity Associated With Oceanic Factors On The Continental Shelf Of The Southern East China Sea, Wen-Yu Chen, Yi-Chen Wang, Ming-An Lee
Early-Summer Ichthyoplankton Biodiversity Associated With Oceanic Factors On The Continental Shelf Of The Southern East China Sea, Wen-Yu Chen, Yi-Chen Wang, Ming-An Lee
Journal of Marine Science and Technology–Taiwan
Ichthyoplankton communities associated with oceanic factors on the continental shelf of the southern East China Sea were studied in early summer 2009. Temperature and salinity of the stations in this survey respectively varied 13.78~ 27.86°C and 33.14~34.77 psu. In total, 1204 fish larval individuals belonging to 62 families and 120 taxa were identified. Using a cluster analysis, the spatial distributions of larval fish were classified into 3 groups: a coastal group, a shelf group, and an offshore group. The offshore group was further divided into 2 subgroups: a mixed shelf group and a Kuroshio group. The coastal group consisted of …
Quantification Of Carbon Emission Reduction By U-Transportation Service Effect: A Case Study Of Dongtan U-City, Tae-Woong Jung, Mu-Wook Pyeon, Jee-Hee Koo
Quantification Of Carbon Emission Reduction By U-Transportation Service Effect: A Case Study Of Dongtan U-City, Tae-Woong Jung, Mu-Wook Pyeon, Jee-Hee Koo
Journal of Marine Science and Technology–Taiwan
With the emergence of the response to climate change as a global agenda, UNFCCC member countries must report their Greenhouse Gas (GHG) emissions and absorptions. With conventional carbon emission estimation methods such as the IPCC Guideline, however, it is impossible to measure reduction of carbon emissions by U-City services. Therefore, this study proposed estimating carbon emission reductions by using U-transportation services as a model because this service appears to be the most effective among U-City services in terms of carbon emission reduction. This approach which is unique in Korea has also attempted to quantify the reduction of carbon emissions by …
Open Source Remote Sensing:Introspect And Prospect, Sanggoo Kang, Hee Young Yoo, Kiwon Lee
Open Source Remote Sensing:Introspect And Prospect, Sanggoo Kang, Hee Young Yoo, Kiwon Lee
Journal of Marine Science and Technology–Taiwan
It is noteworthy that open source applications have been developed and studied in various fields as well as remote sensing field. Open sources for GIS have long history related to open standards over three decades, but those of remote sensing do relatively short. Moreover, there are still no summary reports for open sources for remote sensing. In this study, we summarized characteristics of open source applications for remotely sensed image processing and discussed their strengths and weaknesses at first. Based on the summary, two open source applications for InSAR Processing and Geographic Object-Based Image Analysis are practically implemented to introspect …
Assessment Of Disaster Losses In Rice Paddy Field And Yield After Tsunami Induced By The 2011 Great East Japan Earthquake, Yuei-An Liou, Hsueh-Chun Sha, Ting-Ming Chen, Tai-Sheng Wang, Yi-Ting Li, Yen-Cheng Lai, Min-Hsin Chiang, Li-The Lu
Assessment Of Disaster Losses In Rice Paddy Field And Yield After Tsunami Induced By The 2011 Great East Japan Earthquake, Yuei-An Liou, Hsueh-Chun Sha, Ting-Ming Chen, Tai-Sheng Wang, Yi-Ting Li, Yen-Cheng Lai, Min-Hsin Chiang, Li-The Lu
Journal of Marine Science and Technology–Taiwan
The Great East Japan Earthquake on 11 March 2011 triggered an extremely destructive tsunami that hit the Tohoku region of Japan severely. According to data from the Ministry of Agriculture, Forestry, and Fishes of Japan, Tohoku accounted for 27.59% of Japan’s rice yield in 2010. It is an impact to a country that relies on rice as its main food source. This paper utilizes remote sensing techniques to estimate the disaster losses in rice field and yield in Fukushima and Miyagi, the most severely damaged coastal prefectures of the Tohoku region, by using a developed Rice field Identification and riCe …
An Object-Oriented Analysis For Characterizing The Rainfall-Induced Shallow Landslide, Kuan-Tsung Chang, Jin-King Liu, Chu-I Wang
An Object-Oriented Analysis For Characterizing The Rainfall-Induced Shallow Landslide, Kuan-Tsung Chang, Jin-King Liu, Chu-I Wang
Journal of Marine Science and Technology–Taiwan
Landslides are natural phenomena for the dynamic balance of the earth's surface. Because of frequent occurrences of typhoons and earthquakes in Taiwan, mass movements are common threats to people's lives. In this paper, the interpretation of knowledge is quantified as recognition criteria. Multisource high-resolution data, for example, a SPOT satellite image, 20 m × 20 m Digital Terrain Model (DTM) reduced from Light Detection And Ranging (LiDAR) data, and aerial orthophotos were used to construct the feature space for landslide analysis. Landslides were recognized by an objectoriented method combining edge-based segmentation and a Supported Vector Machine (SVM) method. The classification …
Shallow Water Flow Modeling Using Space-Time Least-Squares Finite-Element Method, Shin-Jye Liang, Chiung-Yang Lan, Ying-Chih Chen
Shallow Water Flow Modeling Using Space-Time Least-Squares Finite-Element Method, Shin-Jye Liang, Chiung-Yang Lan, Ying-Chih Chen
Journal of Marine Science and Technology–Taiwan
Various aglogrithms of least-squares finite-element methods (LSFEM) for convection-diffusion equation (CDE) and shallow-water equations (SWE) are formulated. The associated condition number of the resulting system of equations is systematically compared. It is found that condition number of the resulting system of equations depends on the choice of variables, interpolations, and size of element (∆x). In general, a better conditioned system is obtained by introducing auxiliary variable with low-order interpolation. The developed better conditioned shallow-water model is used to simulate wave propagation over a submerged bar and wave propagation past an elliptical hump. Computed results are compared with experiment data and …
Design And Implementation Of An Simulation Of Water Wave Transformation Using Higher Order Mild-Slope Equation, Yuan-Jyh Lan, Tai-Wen Hsu, Ta-Yuan Lin, Shin-Jye Liang
Design And Implementation Of An Simulation Of Water Wave Transformation Using Higher Order Mild-Slope Equation, Yuan-Jyh Lan, Tai-Wen Hsu, Ta-Yuan Lin, Shin-Jye Liang
Journal of Marine Science and Technology–Taiwan
A higher-order mild-slope equation (HOMSE) is derived based on theory of Hsu et al. [14]. Depth function is approximated up to third-order accurate in terms of both wave nonlinearity and bottom slope. Classical Galerkin method is used to solve HOMSE. Developed model is verified with a series of benchmark tests, including propagation of a sinusoidal wave past a submerged bar, wave propagating on a sloping bed, wave propagating over an elliptic shoal on a uniform slope, and wave propagating through a semicircular slope bottom, respectively. Computed results are compared with experiment data and prediction of low-order mild-slope equation model as …
Inverting Sediment Sound Speed Profile Using A Parameterized Geoacoustic Model: Numerical And Statistical Analysis, Chen-Fen Huang, Shih-Feng Yang, Jin-Yuan Liu
Inverting Sediment Sound Speed Profile Using A Parameterized Geoacoustic Model: Numerical And Statistical Analysis, Chen-Fen Huang, Shih-Feng Yang, Jin-Yuan Liu
Journal of Marine Science and Technology–Taiwan
The objective of this paper is to develop and evaluate an inversion algorithm for estimating the parameters in a geoacoustic model for a marine sediment layer. The geoacoustic model employs a generalized-exponential function for sound speed profile, and an inverse-square function for density distribution. Based upon plane-wave reflection from a nonuniform sediment layer overlying an elastic seafloor, an inversion procedure is established and numerically implemented for estimating the parameters using synthetic noisecontaminated data. The sensitivity of each model parameter is first studied, and then three highly sensitive parameters in the geoacoustic model and one statistical parameter are chosen for inversion …
Possibility Estimation Of Generating Internal Waves In The Northwest Pacific Ocean Using The Fuzzy Logic Technique, Jia-Xun Li, Ren Ren, Bao-Gang Jin, Hui-Zan Wang
Possibility Estimation Of Generating Internal Waves In The Northwest Pacific Ocean Using The Fuzzy Logic Technique, Jia-Xun Li, Ren Ren, Bao-Gang Jin, Hui-Zan Wang
Journal of Marine Science and Technology–Taiwan
Possibility estimation of generating internal waves has been recognized as a difficult problem because of the complex generation mechanisms and insufficient in situ observation data of internal waves. In this study, a inference model based on the fuzzy logic technique was developed for estimating the generation possibility of internal waves. The marine environmental factors causing the occurrence of internal waves were distilled from ocean data and used as the inputs of the fuzzy inference model, and the generation possibilities of internal waves were used as the output of the model. The developed model was applied to the northwest Pacific, and …
Aerosol Optical Depth Retrieval For Spot Hrv Images, Chien-Hui Liu, Gin-Rong Liu
Aerosol Optical Depth Retrieval For Spot Hrv Images, Chien-Hui Liu, Gin-Rong Liu
Journal of Marine Science and Technology–Taiwan
Atmospheric aerosol is an important factor of the Earth’s radiation budget. The aerosol optical depth (AOD) is also the key parameter in generating surface products from remotely sensed data. An image-based retrieval algorithm of aerosol characteristics and surface reflectance is used to retrieve the AOD from SPOT satellite images in this paper. The accuracy of retrieved AOD is assessed using sunphotometer measurements. SPOT satellite images in Jhongli , Taoyuan county are used to testify the algorithm. The results show that the rootmean-square error (RMSE) of the retrieved AOD at 0.55 µm is 0.10. Over the range of measured AOD 0.08~0.34, …
Unsteady Motions Of Separated Shear Layer In Wake Flow Due To Upstream Disturbance, Chin-Tsan Wang, Jun-Ji Miau, Cheng Kuang Shaw
Unsteady Motions Of Separated Shear Layer In Wake Flow Due To Upstream Disturbance, Chin-Tsan Wang, Jun-Ji Miau, Cheng Kuang Shaw
Journal of Marine Science and Technology–Taiwan
The phenomenon of physical wake flow is complex and remains relatively unknown, especially for the relationship between the span-wise motions of separated shear layers and low frequency variations embedded in the vortex shedding process of upstream disturbances. In this study experiments were executed by situating a mesh grid and controlling cylinder upstream. Results showed that the integral time scale of the span-wise motions for a separated shear layer was close to that of the low frequency variations for an upstream disturbance. This evidence supports the idea that span-wise motions of a separated shear layer and the low frequency variations should …
Analysis On Typhoon Longwang Intensity Changes Over The Ocean Via Satellite Data, Chung-Chih Liu, Tian-Yow Shyu, Chun-Chieh Chao, Yu-Feng Lin
Analysis On Typhoon Longwang Intensity Changes Over The Ocean Via Satellite Data, Chung-Chih Liu, Tian-Yow Shyu, Chun-Chieh Chao, Yu-Feng Lin
Journal of Marine Science and Technology–Taiwan
The changes in the typhoon intensity are a very important process. In this study, we used satellite data to analyze the cloud structure of Typhoon Longwang. Results show that the changes in the high level cirrus pattern seemed to have a connection to the typhoon intensity. During the time period from 0600UTC to 1200UTC 30 September 2005, the high level cirrus clouds of Typhoon Longwang radiated from the inner core region. The cloud area that Typhoon Longwang covered grew larger, and the pattern changed from a asymmetric to symmetric distribution during 0000UTC to 1200UTC 30 September 2005. The best track …
The Freak Wave Mystery ??A New Hypothesis For Its Occurrence, Nai-Kuang Liang
The Freak Wave Mystery ??A New Hypothesis For Its Occurrence, Nai-Kuang Liang
Journal of Marine Science and Technology–Taiwan
Freak waves are known as a maritime myth, which have damaged large cargo and cruise ships. So far freak waves are explained by strong current focusing and nonlinear wave interaction. The latter may results in a single large wave. However this can still not explain the disappearance of the cargo ship Muenchen in December, 1978. This paper proposes a new hypothesis which stems from the wave/ swell energy flux accumulation due to the moving wind system. Nature might play the game by controlling the moving speed to approach the wave/swell group velocity.
Wave Propagation At The Interface Of A Two-Layer Fluid System In The Laboratory, Chen-Yuan Chen, John Rong-Chung Hsu, Cheng-Wu Chen, Ching-Feng Kuo, Hsin-Hsun Chen, Min-Hung Cheng
Wave Propagation At The Interface Of A Two-Layer Fluid System In The Laboratory, Chen-Yuan Chen, John Rong-Chung Hsu, Cheng-Wu Chen, Ching-Feng Kuo, Hsin-Hsun Chen, Min-Hung Cheng
Journal of Marine Science and Technology–Taiwan
A series of laboratory experiments on internal solitary wave (ISW) had been conducted in a two-layer fluid system. Internal solitary waves were generated in laboratory which was controlled by several variables, including different layer thickness ratios H1/H2, interface differences ηo, and the density ratios ρ1/ρ2. The wave flume used in this experiment was 12 meter long with a cross-section 0.5 m wide by 0.7m in height. Five ultrasonic probes placed at equidistance recorded the interface fluctuations, and one density probe measured the change of density across the interface. Data collection and processing were carried out via control software. This paper …
Generation Of Internal Solitary Wave By Gravity Collapse, Chen-Yuan Chen, John Rong-Chung Hsu, Cheng-Wu Chen, Hsin-Hsun Chen, Ching-Feng Kuo, Min-Hung Cheng
Generation Of Internal Solitary Wave By Gravity Collapse, Chen-Yuan Chen, John Rong-Chung Hsu, Cheng-Wu Chen, Hsin-Hsun Chen, Ching-Feng Kuo, Min-Hung Cheng
Journal of Marine Science and Technology–Taiwan
Laboratory experiments were conducted to investigate the generation of an internal solitary wave (ISW) in a two-layer free surface fluid system in wave flume (12 m × 0.5 m × 0.7 m), which included wave channel and compartment. There is filled with stratified twolayer fluid system in the channel and small compartment, respectively. These two regions in the wave flume are separated by a movable vertical gate at one end of the flume for generating the ISW (internal solitary wave). An ISW generation is thus caused by gravity collapse upon raising the vertical gate. Given positive potential energies, an elevation-type …
Evaluation Of Satellite-Derived Objective Potential Index For Oceanic Cloud System During The Mei-Yu Period, Chung-Chih Liu, Gin-Rong Liu, Chun-Chieh Chao, Da-Gang Pan, Ji-En Li
Evaluation Of Satellite-Derived Objective Potential Index For Oceanic Cloud System During The Mei-Yu Period, Chung-Chih Liu, Gin-Rong Liu, Chun-Chieh Chao, Da-Gang Pan, Ji-En Li
Journal of Marine Science and Technology–Taiwan
Many mesoscale convective systems (MCSs) accompanied by heavy rainfall are frequently observed over the Taiwan Strait along the Mei-Yu front. An objective potential index of air-sea interaction was proposed by employing satellite data for pointing out areas where oceanic convective clouds may occur and develop into MCSs [11]. The aim of present research is to evaluate that index through the data of 2001 and 2002. The results show that a greater objective potential index is correlated with a larger probability of colder infrared brightness temperature. In addition, the analysis of serial correlation for these two discrete parameters (objective potential index …
Parametrically Resonant Surface Waves In A Rectangular Basin, Wu-Ting Tsai
Parametrically Resonant Surface Waves In A Rectangular Basin, Wu-Ting Tsai
Journal of Marine Science and Technology–Taiwan
We consider the resonant motion of a layer of fluid in a twodimensional rectangular basin forced to oscillate vertically. The equation governing the slowly-varying amplitude is derived using the multiple-scales method of perturbation analysis. The solution of the evolution equation is obtained analytitally. For steady harmonic responses, the present result compares remarkably well with available experimental measurements and is an improvement over existing third-order perturbation calculations. For unsteady (periodic) motions, the periods are computed as a function of motion amplitudes. The presence of internal resonance is discussed briefly.