scholarly journals Prediction of Coastal Upwelling Using Remote Sensing

IJARCCE ◽  
2016 ◽  
Vol 5 (1) ◽  
pp. 43-47
Author(s):  
Priya R ◽  
Ranjani R ◽  
Thamizharasi M
Keyword(s):  
Remote Sensing ◽  
Coastal Upwelling

Assessing the performance of a multi-nested ocean circulation model using satellite remote sensing and in situ observations

2016 ◽  
Vol 1 (1) ◽  
Author(s):  
Shiliang Shan ◽  
Jinyu Sheng ◽  
Kyoko Ohashi ◽  
Mathieu Dever
Keyword(s):  
Remote Sensing ◽  
Nova Scotia ◽  
Ocean Circulation ◽  
Satellite Remote Sensing ◽  
Coastal Upwelling ◽  
Circulation Model ◽  
Tidal Mixing ◽  
Scotian Shelf ◽  
Ocean Circulation Model

This study presents a multi-nested ocean circulation model developed recently for the central Scotian Shelf. The model consists of four submodels downscaling from the eastern Canadian Shelf to the central Scotian Shelf. The model is driven by tides, river discharges, and atmospheric forcing. The model results are validated against observations, including satellite remote sensing data from GHRSST and Aquarius and in situ measurements taken by tide gauges, a marine buoy, ADCPs and CTDs. The ocean circulation model is able to capture variations of sea level, hydrography and the Nova Scotia Current on timescales of days to seasons over the central Scotian Shelf. Model results are used in a process study to examine the effect of tidal mixing and wind-driven coastal upwelling in the formation of cold surface waters along the coast of Nova Scotia.

Investigation of hydrogen sulphide eruptions along the Namibian coastline using different remote sensing systems

2009 ◽  
Vol 1 (3) ◽  
Author(s):  
Thomas Ohde
Keyword(s):  
Remote Sensing ◽  
Hydrogen Sulphide ◽  
Coastal Upwelling ◽  
Temporal Distribution ◽  
Dust Deposition ◽  
Ocean Colour ◽  
The North ◽  
Microwave Scatterometer ◽  
Westerly Direction ◽  
Remote Sensing Techniques

AbstractHydrogen sulphide eruptions with their typical turquoise discolorations at the water surface are a unique phenomenon along the Namibian coastline. The remote sensing techniques of ocean colour sensors and microwave scatterometers were used for the investigation of such events. The studies with ocean colour sensors showed that the turquoise discolorations near the Namibian coast were neither linked to dust deposition into the water column by desert storms nor to the reflection of bright material in shallow water areas. In addition, other coloured marine events like algae blooms and river outflows were differentiable from the hydrogen sulphide eruptions by their special optical properties. Quasi-true colour images and spectral identification methods were utilised to monitor and investigate the spatial and temporal distribution of sulphide events. In the past years, they were sometimes and locally limited discovered. Newest remote sensing observations including our own investigations have established that the occurrence of sulphide events is more frequent and longer lasting. The north-westerly direction of propagation and their velocity between 12 cm s-1 and 15 cm s1 were derived from an event on 14 April 2004. Lastly, the microwave scatterometer remote sensing was applied to investigate the relation of sulphide events to oceanographic conditions. The events from May 2004 were clearly related to strong coastal upwelling.

scholarly journals Pseudo-nitzschia Blooms in a Coastal Upwelling System: Remote Sensing Detection, Toxicity and Environmental Variables

Water ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1954 ◽  
Author(s):  
Jesus M. Torres Palenzuela ◽  
Luis González Vilas ◽  
Francisco M. Bellas ◽  
Elina Garet ◽  
África González-Fernández ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Harmful Algal Blooms ◽  
Algal Blooms ◽  
Domoic Acid ◽  
Coastal Upwelling ◽  
Empirical Models ◽  
Full Resolution ◽  
Shellfish Farming ◽  
Sensing Model ◽  
Key Variables

The NW coast of the Iberian Peninsula is dominated by extensive shellfish farming, which places this region as a world leader in mussel production. Harmful algal blooms in the area frequent lead to lengthy harvesting closures threatening food security. This study developed a framework for the detection of Pseudo-nitzschia blooms in the Galician rias from satellite data (MERIS full-resolution images) and identified key variables that affect their abundance and toxicity. Two events of toxin-containing Pseudo-nitzschia were detected (up to 2.5 μg L−1 pDA) in the area. This study suggests that even moderate densities of Pseudo-nitzschia in this area might indicate high toxin content. Empirical models for particulate domoic acid (pDA) were developed based on MERIS FR data. The resulting remote-sensing model, including MERIS bands centered around 510, 560, and 620 nm explain 73% of the pDA variance (R2 = 0.73, p < 0.001). The results show that higher salinity values and lower Si(OH)4/N ratios favour higher Pseudo-nitzschia spp. abundances. High pDA values seem to be associated with relatively high PO43, low NO3− concentrations, and low Si(OH)4/N. While MERIS FR data and regionally specific algorithms can be useful for detecting Pseudo-nitzschia blooms, nutrient relationships are crucial for predicting the toxicity of these blooms.

scholarly journals Improving the Remote Sensing Retrieval of Phytoplankton Functional Types (PFT) Using Empirical Orthogonal Functions: A Case Study in a Coastal Upwelling Region

2018 ◽  
Vol 10 (4) ◽  
pp. 498 ◽  
Author(s):  
Marco Correa-Ramirez ◽  
Carmen Morales ◽  
Ricardo Letelier ◽  
Valeria Anabalón ◽  
Samuel Hormazabal
Keyword(s):  
Remote Sensing ◽  
Coastal Upwelling ◽  
Empirical Orthogonal Functions ◽  
Orthogonal Functions ◽  
Functional Types
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