The paper explored applicability of Landsat OLI sensor for monitoring concentration and movement of suspended particles along coastal landscape of Thiruvananthapuram. Suspended sediments moved north-south during post monsoon and reversed their direction during post monsoon season under the influence of monsoon winds. The findings revealed that the sediment concentration decreased rapidly with the increase in distance to the beach and depth to the seabed. Hide

Ocean tides and mean sea level (MSL) can show correlations of short-term variability in addition to the long term trends, which may combine to increase total water levels at multiple time scales. Such changes may have implications for short-term high-water events such as nuisance flooding. This work analyzes the variability of tides in the Hong Kong region to find that small changes in MSL may amplify tidal changes in Hong Kong, suggesting a strong sensitivity of water levels in the region. Hide

Understanding the role of ocean currents in the recruitment of commercially important fish is an important step toward developing sustainable resource management guidelines. Here, we attempt to elucidate the role of surface ocean transport in supplying recruits of European sardine to the Gulf of Manfredonia, a known recruitment area in the Adriatic Sea. We find that transport to the Gulf of Manfredonia from remote spawing areas in the Adriatic is more likely than local spawning and retention. Hide

This paper deals with the quantification of the vertical transfers of heat, salt and mass between the inflowing and outflowing layers at the Strait of Gibraltar from the outputs of a very high spatial resolution numerical model. As a novelty, the model is not only forced by realistic barotropic tides, but also by the atmospheric pressure and heat and water fluxes at the sea surface. This fact allows a realistic representation of the exchanges at the Strait. Hide

Using a regional model of the northwestern North Atlantic shelves, we calculate transport timescales and pathways in order to understand the transport processes that underlie the rapid oxygen loss, air–sea CO₂ flux, and supply of plankton seed populations on the Scotian Shelf. Study results highlight the limited connectivity between the Scotian Shelf and adjacent slope waters; instead, the dominant southwestward currents bring Grand Banks and Gulf of St. Lawrence waters to the Scotian Shelf. Hide

Tide predictions based on tide-gauge observations are not just astronomical tides, they also contain periodic sea level changes due to the weather. Forecasts of total water level during storm surges add the immediate effects of the weather to the astronomical tide prediction, so must be careful not to double-count these effects. We calculate how much double-counting may affect these forecasts, and also how much of the Highest Astronomical Tide may also be due to recurrent weather patterns. Hide

The primary aim of the study is to estimate wave energy attenuation by mangrove vegetation using SWAN model, and validate the model results with measurements for the Mumbai coastal region. Wave measurements presents wave height attenuation of the order of 52 %. Spectral analysis performed for the cases with and without vegetation very clearly portrays energy dissipation in the vegetation area. The model reproduced attenuation, ranging from 49 to 55 %, which matches well with the measured data. Hide

A new concept of two types of marine geoid and associated absolute dynamic ocean topography is presented. The first type is the average level of sea surface height if the water is at rest (classical). The second type is determined by satellite observation under the condition that usually the water is in motion. The difference between the two types of absolute dynamic ocean topography is evident. Such difference needs attention from oceanographic and geodetic communities. Hide

Based on nearly 17 years of profiling (Argo) float data, high resolution (~ 25 km grid) maps of mean flow and eddy kinetic energy (EKE) were constructed for the intermediate-deep subpolar North Atlantic. Robust boundary currents along topographic slopes, mid-basin advective pathways and stagnation regimes were identified. The ration of mean flow vs. the square root of EKE indicates regions dominated by advection, and large regions in which eddy diffusion prevails. Hide

Motivated by the recent field observations of the eddy tilting structure in the South China Sea, a simple theoretical analysis and a numerical model (MITgcm) are used to investigate the mechanism of the vertical structure tilt of a mesoscale eddy on the β-plane. The model results correspond well with the theoretical analysis and the results indicate that the β-effect, nonlinear advection, and ocean stratification are important factors in controlling the vertical structure of a mesoscale eddy. Hide

Here we present results of an intensive physical oceanography study near 30° S focused on the description of the seasonal and the synoptic variability of diurnal currents. The study, highlights the greatest variability of the diurnal currents which are highly influenced by the diurnal wind forcing, also modulated by a synoptic-scale circulation pattern. Our results show that the highest diurnal current variability suggesting a strong coupling between diurnal wind forcing and inertial oscillations. Hide