Dynamical connections between large marine ecosystems of austral South America based on numerical simulations

Guihou, Karen; Piola, Alberto R.; Palma, Elbio Daniel; Chidichimo, María Paz

doi:10.5194/os-16-271-2020

Cited by 42 publications

(19 citation statements)

References 44 publications

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“…These wind anomalies produce a cross-shore pressure gradient due to changes in the SSH that modulates the intensity of the along-shore transport. A similar argument to explain the interannual variability of the transport was provided over the southern portion of the Patagonia continental shelf (Combes & Matano, 2018;Guihou et al, 2020). We also evaluated the transport response to the SOI.…”

Section: Satellite Transport: Interannual Variabilitymentioning

confidence: 90%

Volume Transport Variability on the Northern Argentine Continental Shelf From In Situ and Satellite Altimetry Data

et al. 2021

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Though continental shelves host large primary productivity and contribute significantly to the carbon balance of the global ocean, in many regions the dynamics of the shelf circulation and its temporal variability are still poorly understood. The Argentine Continental Shelf (ACS) hosts one of the most productive ecosystems of the world ocean and abundant fishing resources of commercial relevance (Acha et al., 2004; Álvarez-Colombo et al., 2011; Auad & Martos, 2012; Romero et al., 2006), whose life cycles are modulated by physical processes. The environmental variability modulates the primary production which, in turn, is transferred to higher trophic levels (Bakun, 1998). Therefore, improved understanding of the regional circulation variability and its drivers are essential to better understand the dynamics of the shelf circulation

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Section: Satellite Transport: Interannual Variabilitymentioning

confidence: 90%

Volume Transport Variability on the Northern Argentine Continental Shelf From In Situ and Satellite Altimetry Data

et al. 2021

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“…Taking account of the importance of Southern Ocean ecosystems and their connectivity in the wider Earth system will also be important for regulatory bodies that consider ecosystems across the Southern Hemisphere and throughout the global ocean. Xu et al, 2019;Zuercher and Galloway, 2019;Guihou et al, 2020). However, oceanic ecosystems' ecological connectivity may be particularly important in the high-latitude and seasonal polar ocean ecosystems (Niiranen et al, 2018).…”

Section: Concluding Commentsmentioning

confidence: 99%

Global Connectivity of Southern Ocean Ecosystems

et al. 2021

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Southern Ocean ecosystems are globally important. Processes in the Antarctic atmosphere, cryosphere, and the Southern Ocean directly influence global atmospheric and oceanic systems. Southern Ocean biogeochemistry has also been shown to have global importance. In contrast, ocean ecological processes are often seen as largely separate from the rest of the global system. In this paper, we consider the degree of ecological connectivity at different trophic levels, linking Southern Ocean ecosystems with the global ocean, and their importance not only for the regional ecosystem but also the wider Earth system. We also consider the human system connections, including the role of Southern Ocean ecosystems in supporting society, culture, and economy in many nations, influencing public and political views and hence policy. Rather than Southern Ocean ecosystems being defined by barriers at particular oceanic fronts, ecological changes are gradual due to cross-front exchanges involving oceanographic processes and organism movement. Millions of seabirds and hundreds of thousands of cetaceans move north out of polar waters in the austral autumn interacting in food webs across the Southern Hemisphere, and a few species cross the equator. A number of species migrate into the east and west ocean-basin boundary current and continental shelf regions of the major southern continents. Human travel in and out of the Southern Ocean region includes fisheries, tourism, and scientific vessels in all ocean sectors. These operations arise from many nations, particularly in the Northern Hemisphere, and are important in local communities as well as national economic, scientific, and political activities. As a result of the extensive connectivity, future changes in Southern Ocean ecosystems will have consequences throughout the Earth system, affecting ecosystem services with socio-economic impacts throughout the world. The high level of connectivity also means that changes and policy decisions in marine ecosystems outside the Southern Ocean have consequences for ecosystems south of the Antarctic Polar Front. Knowledge of Southern Ocean ecosystems and their global connectivity is critical for interpreting current change, projecting future change impacts, and identifying integrated strategies for conserving and managing both the Southern Ocean and the broader Earth system.

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“…10.1029/2020JC016727 8 of 20 data (Piola & Gordon, 1989), and numerical simulations (Combes & Matano, 2018;Fetter & Matano, 2008;Guihou et al, 2020). Based on these observations we suggest that the inshore branch of the MC originates east of Estados Island, while the main branch originates east of the Burdwood Bank.…”

Section: Structure Of the Current In The Scotia Seamentioning

confidence: 76%

Direct Measurements of the Malvinas Current Velocity Structure

et al. 2021

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The cold Malvinas Current (MC) is one of the main circulation patterns in the southwestern South Atlantic Ocean (Peterson & Whitworth III, 1989). This current originates as a branch of the Antarctic Circumpolar Current (ACC) (Provost et al., 1996), rounds east of the Falklands/Malvinas Islands, and flows northward along the continental slope of South America (Figure 1) (Willson & Rees, 2000). The MC follows the Subantarctic Front (SAF), one of three main fronts of the ACC in the Drake Passage (Barre et al., 2011;Sokolov & Rintoul, 2009). It is generally accepted that the MC starts near the Burdwood Bank at around 55°S; upstream from the sharp northward turn of the SAF, the flow is referred to as the northern branch of the ACC (Artana et al., 2016). At approximately 38°S, the MC meets with the Brazil Current, generating a thermohaline front known as the Brazil Malvinas Confluence zone (Brennecke, 1921;Deacon, 1937). Further downstream, both currents retroflect and instabilities generate prominent mesoscale structures (Chelton et al., 1990;Zyrjanov & Severov, 1979). On average, the front intersects the

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Dynamical connections between large marine ecosystems of austral South America based on numerical simulations

Cited by 42 publications

References 44 publications

Volume Transport Variability on the Northern Argentine Continental Shelf From In Situ and Satellite Altimetry Data

Volume Transport Variability on the Northern Argentine Continental Shelf From In Situ and Satellite Altimetry Data

Global Connectivity of Southern Ocean Ecosystems

Direct Measurements of the Malvinas Current Velocity Structure

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