Feasibility of targeted fishing in mesoscale oceanic eddies: a study from commercial fishing grounds of Andaman and Nicobar Islands, India

Asundi, Anand; Krishnan, P.; Kiruba-Sankar, R.; Suryavanshi, Arun; Kumar, K. Lohith; Kantharajan, G.; Choudhury, S. B.; Manjulatha, C.; Babu, D. Erri

doi:10.1080/01431161.2020.1724347

Cited by 18 publications

(9 citation statements)

References 62 publications

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“…A remote sensing/satellite tracking study of juvenile loggerhead turtles in the Southwest Atlantic (Gaube et al, 2017) revealed a similar tendency as the turtles tend to congregate in the interiors of AC-eddies, apparently to feed, despite low-CHL concentrations in surface layers of these eddies. These observations (and some previous (Godø et al, 2012) and most recent (Arur et al, 2020) studies as well) show that AC-eddies are not lifeless ocean deserts as commonly thought in the past. Conversely, mesoscale AC-eddies support the most abundant mesopelagic fish community in the World Ocean (Braun et al, 2019).…”

Section: Ecological Role Of Fronts and Eddiessupporting

confidence: 73%

Remote Sensing of Ocean Fronts in Marine Ecology and Fisheries

Belkin¹

2020

Preprint

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This paper provides a concise review of remote sensing of ocean fronts and its applications in marine ecology and fisheries, with a particular focus on the most popular front detection algorithms/techniques: Canny (1986), Cayula and Cornillon (1990, 1992, 1995), Miller (2004, 2009), Shimada et al. (2005), Belkin and O’Reilly (2009), and Nieto et al. (2012). A case is made for feature-based approach in marine ecology and fisheries that emphasizes fronts as major structural and circulation features of the ocean realm that play key roles in various aspects of marine ecology.

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Section: Ecological Role Of Fronts and Eddiessupporting

confidence: 73%

Remote Sensing of Ocean Fronts in Marine Ecology and Fisheries

Belkin¹

2020

Preprint

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“…Moreover, these long‐lived mesoscale eddies can have a strong impact on biological productivity and on the upper‐ocean ecology and biogeochemical cycles (Cotroneo et al., 2016; d’Ovidio et al., 2010; Lévy et al., 2018; Mcgillicuddy et al., 1998) especially in an oligotrophic area. Hence, the movement of pelagic species can be strongly influenced by the dynamics of mesoscale eddies, their surrounding filaments (Abrahms et al., 2018; Baudena et al., 2019; Cotté et al., 2011), and some fisheries track Lagrangian coherent structures associated with eddies (Arur et al., 2020; Budyansky et al., 2017; Prants et al., 2012; Watson et al., 2018). Therefore, the dynamics of mesoscale eddies have a significant impact on the surface circulation and oceanic biogeochemistry at both local and regional scales.…”

Section: Introductionmentioning

confidence: 99%

“…10.1029/2021JC017475 2 of 17 Cotté et al, 2011), and some fisheries track Lagrangian coherent structures associated with eddies (Arur et al, 2020;Budyansky et al, 2017;Prants et al, 2012;Watson et al, 2018). Therefore, the dynamics of mesoscale eddies have a significant impact on the surface circulation and oceanic biogeochemistry at both local and regional scales.…”

mentioning

confidence: 99%

Cyclone‐Anticyclone Asymmetry of Eddy Detection on Gridded Altimetry Product in the Mediterranean Sea

Stegner

Dumas

et al. 2021

JGR Oceans

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We perform an Observing System Simulation Experiment that simulates the satellite sampling and the mapping procedure on the sea surface of the high‐resolution model CROCO‐MED60v40, to investigate the reliability and the accuracy of the eddy detection. The main result of this study is a strong cyclone‐anticyclone asymmetry of the eddy detection on the altimetry products AVISO/CMEMS in the Mediterranean Sea. Large‐scale cyclones having a characteristic radius larger than the local deformation radius are much less reliable than large‐scale anticyclones. We estimate that less than 60% of these cyclones detected on gridded altimetry product are reliable, while more than 85% of mesoscale anticyclones are reliable. Besides, both the barycenter and the size of these mesoscale anticyclones are relatively accurate. This asymmetry comes from the difference of stability between cyclonic and anticyclonic eddies. Large mesoscale cyclones often split into smaller sub‐mesoscale structures having a rapid dynamical evolution. The numerical model CROCO‐MED60v40 shows that this complex dynamic is too fast and too small to be accurately captured by the gridded altimetry products. The spatio‐temporal interpolation smoothes out this sub‐mesoscale dynamics and tends to generate an excessive number of unrealistic mesoscale cyclones in comparison with the reference field. On the other hand, large mesoscale anticyclones, which are more robust and which evolve more slowly, can be accurately tracked by standard altimetry products. We also confirm that the AVISO/CMEMS products induce a bias on the eddy intensity. The azimuthal geostrophic velocities are always underestimated for large mesoscale anticyclones.

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“…Moreover, these long-lived mesoscale eddies can have a strong impact on biological productivity and on the upper-ocean ecology and biogeochemical cycles (Mcgillicuddy et al, 1998;d'Ovidio et al, 2010;Lévy et al, 2018;Cotroneo et al, 2016) especially in an oligotrophic area. Hence, the movement of pelagic species can be strongly influenced by the dynamics of mesoscale eddies and their surrounding filaments (Cotté et al, 2011;Abrahms et al, 2018;Baudena et al, 2019) and some fisheries track lagrangian coherent structures associated to eddies (Prants et al, 2012;Budyansky et al, 2017;Watson et al, 2018;Arur et al, 2020). Therefore, the dynamics of mesoscale eddies have a significant impact on the surface circulation and oceanic biogeochemistry at both local and regional scales.…”

Section: Introductionmentioning

confidence: 99%

Cyclone-Anticyclone asymmetry of eddy detection on gridded altimetry product in the Mediterranean Sea 

Stegner¹,

Vu²,

Dumas

et al. 2021

Preprint

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Thanks to a Observing System Simulation Experiment (OSSE) that simulate the along-track satellite measuring process on the sea surface of the high resolution model CROCO-MED60v40-15-16 we investigate how the reliability and the accuracy of the detected eddies are influenced by the satellite sampling and the mapping procedure. The main result of this study is that there is that there is a strong cyclone-anticyclone asymmetry of the eddy detection on the altimetry products AVISO/CMEMS in the Mediterranean Sea. Large scale cyclones having a characteristic radius larger than the local deformation radius are much less reliable than large scale anticyclones. We estimate, that less than 60% of these cyclones detected on gridded altimetry product are reliable, while more than 85% of mesoscale anticyclones are reliable. Besides, both the barycenter and the size of these mesoscale anticyclones are relatively accurate. This asymmetry comes from the difference of stability between cyclones and anticyclones. Large mesoscale cyclones often splits into smaller sub mesoscale structures hav&#160;ing a rapid dynamical evolution. The high resolution model CROCO-MED60v40 shows that this complex dynamic is too fast and too small to be accurately captured by the gridded altimetry products based on a strong spatio-temporal &#160;interpolation. The later smooth out this sub mesoscale dynamics and tend to generate an excessive number of unrealistic (i.e. unreliable) mesoscale cyclones in comparison with the reference field. On the other hand, large mesoscale anticyclones, &#160;which are more robust and that evolve more slowly, can be spatially resolved and accurately tracked by standard altimetry products.&#160; However, we confirm that gridded altimetry products have a systematic bias on the eddy intensity and especially for anticyclones. The azimuthal geostrophic velocities are always underestimated on the AVISO/CMEMS products even for large mesoscale anticyclones.&#160;

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Feasibility of targeted fishing in mesoscale oceanic eddies: a study from commercial fishing grounds of Andaman and Nicobar Islands, India

Cited by 18 publications

References 62 publications

Remote Sensing of Ocean Fronts in Marine Ecology and Fisheries

Remote Sensing of Ocean Fronts in Marine Ecology and Fisheries

Cyclone‐Anticyclone Asymmetry of Eddy Detection on Gridded Altimetry Product in the Mediterranean Sea

Cyclone-Anticyclone asymmetry of eddy detection on gridded altimetry product in the Mediterranean Sea

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Feasibility of targeted fishing in mesoscale oceanic eddies: a study from commercial fishing grounds of Andaman and Nicobar Islands, India

Cited by 18 publications

References 62 publications

Remote Sensing of Ocean Fronts in Marine Ecology and Fisheries

Remote Sensing of Ocean Fronts in Marine Ecology and Fisheries

Cyclone‐Anticyclone Asymmetry of Eddy Detection on Gridded Altimetry Product in the Mediterranean Sea

Cyclone-Anticyclone asymmetry of eddy detection on gridded altimetry product in the Mediterranean Sea&#160;

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Cyclone-Anticyclone asymmetry of eddy detection on gridded altimetry product in the Mediterranean Sea