Backtrack modeling to locate the origin of tar balls depositing along the west coast of India

Suneel, V.; Ciappa, Achille; Vethamony, P.

doi:10.1016/j.scitotenv.2016.06.101

Cited by 26 publications

(8 citation statements)

References 25 publications

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“…In time-dependent, chaotic flow, an Eulerian viewpoint provides limited information about the transport of material, therefore, it is natural to approach the problems of material transport in a Lagrangian framework [Vandenbulcke et al, 2009;Wei et al, 2018]. Lagrangian particle tracking is applied to examine the fate, source and mixing of materials in many geophysical flows [Fredj et al, 2016] including oil and debris in the near shore [Suneel et al, 2016;Qiao et al, 2019]. In addition, significant emphasis has been aimed at managing the floating marine debris through intensive shoreline clean-up in different parts of the world [Hardesty & Wilcox, 2011;AMDI, 2018;Yu et al, 2018;Chen et al, 2019].…”

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confidence: 99%

Material and debris transport patterns in Moreton Bay, Australia: The influence of Lagrangian coherent structures

Suara

Khanarmuei

Ghosh

et al. 2020

Science of The Total Environment

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Coastal tidal estuaries are vital to the exchange of energy and material between inland waters and the open ocean.Debris originating from the land and ocean enter this environment and are transported by currents (river outflow and tide), wind, waves and density gradients. Understanding and predicting the source and fate of such debris has considerable environmental, economic and visual importance. We show that this issue can be addressed using the Lagrangian coherent structures (LCS) technique which is highly robust to hydrodynamic model uncertainties.Here we present a comprehensive study showing the utility of this approach to describe the fate of floating material in a coastal tidal embayment. An example is given from Moreton Bay, a semi-enclosed subtropical embayment with high morphologic, ecological and economic significance to Southeast Queensland, Australia. Transport barriers visualised by the LCS create pathways and barriers for material transport in the embayment. It was found that the wind field modified both the rate attraction and location of the transport barriers. One of the key outcomes is the demonstration of the significant role of islands in partitioning the transport of material and mixing within the embayment. The distribution of the debris sources along the shoreline are explained by the relative location of the LCS to the shoreline. Therefore, extraction of LCS can help to predict sources and fate of anthropogenic marine debris and thus, serve as a useful way for effective management of vulnerable regions and marine protected areas.

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confidence: 99%

Material and debris transport patterns in Moreton Bay, Australia: The influence of Lagrangian coherent structures

Suara

Khanarmuei

Ghosh

et al. 2020

Science of The Total Environment

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“…Such information can be achieved by using inverse drift computation, relying on knowing current velocity fields, obtained from ocean models or by highresolution currents measured by coastal HF radar networks (Abascal et al, 2012). Such backtracking methods have mostly been used for oil dispersion studies (Breivik et al, 2012b;Suneel et al, 2016;Chen, 2019), but also as forensic support in the tragic accident of Air France flight (AF447) over the Atlantic (Drévillon et al, 2013).…”

Section: Existing Resourcesmentioning

confidence: 99%

When Tragedy Strikes: Potential Contributions From Ocean Observation to Search and Rescue Operations After Drowning Accidents

et al. 2020

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Drowning accidents followed by the disappearance of the body are particularly distressing events. When such tragedy strikes, Search and Rescue Operations are usually deployed to recover the body. The efficiency of such efforts can be enhanced by timely data and appropriate data integration tools, such as operational prediction systems relying on numerical models or other data sources. In this paper, we propose four stages for Search and Rescue Operations after drowning accidents and briefly address the critical role of ocean observations at each stage, as well as the relevancy of available computational resources. The potential of the combination of different data sources on the state of the sea to provide better insights is discussed. This work encourages oceanographers, data scientists and relevant marine stakeholders to produce knowledge and tools to support Search and Rescue Operations after drowning accidents.

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“…This occurs, for instance, when we aim to determine the key regions that can affect vulnerable marine protected areas downstream, or in the identification of nutrient sources feeding a biogeochemical active region (Ciappa and Costabile 2014;Suneel et al 2016).…”

Section: Identification Of a Source Regionmentioning

confidence: 99%

Crossroads of the mesoscale circulation

Baudena

Ser‐Giacomi

López

et al. 2019

Journal of Marine Systems

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Quantifying the mechanisms of tracer dispersion in the ocean remains a central question in oceanography, for problems ranging from nutrient delivery to phytoplankton, to the early detection of contaminants. Until now, most of the analysis has been based on Lagrangian concepts of transport, often focusing on the identification of features that minimize fluid exchange among regions, or more recently, on network tools which focus instead on connectivity and transport pathways. Neither of these approaches, however, allows us to rank the geographical sites of major water passage, and at the same time, to select them so that they monitor waters coming from separate parts of the ocean. These are instead key criteria when deploying an observing network. Here we address this issue by estimating at any point the extent of the ocean surface which transits through it in a given time window. With such information we are able to rank the sites with major fluxes that intercept waters originating from different regions. We show that this allows us to optimize an observing network, where a set of sampling sites can be chosen for monitoring the largest flux of water dispersing out of a given region. When the analysis is performed backward in time, this method allows us to identify the major sources which feed a target region. The method is first applied to a minimalistic model of a mesoscale eddy field, and then to realistic satellite-derived ocean currents in the Kerguelen area. In this region we identify the optimal location of fixed stations capable of intercepting the trajectories of 43 surface drifters, along with statistics on the temporal persistence of the stations determined in this way. We then identify possible hotspots of micro-nutrient enrichment for the recurrent spring phytoplanktonic bloom occuring here. Promising applications to other fields, such as larval connectivity, marine spatial planning or contaminant detection, are then discussed. arXiv:1802.02743v4 [physics.ao-ph]

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Backtrack modeling to locate the origin of tar balls depositing along the west coast of India

Cited by 26 publications

References 25 publications

Material and debris transport patterns in Moreton Bay, Australia: The influence of Lagrangian coherent structures

Material and debris transport patterns in Moreton Bay, Australia: The influence of Lagrangian coherent structures

When Tragedy Strikes: Potential Contributions From Ocean Observation to Search and Rescue Operations After Drowning Accidents

Crossroads of the mesoscale circulation

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