The deep-sea as a final global sink of semivolatile persistent organic pollutants? Part I: PCBs in surface and deep-sea dwelling fish of the North and South Atlantic and the Monterey Bay Canyon (California)

North and South Atlantic lateral volume exchange is a key component of the Atlantic Meridional Overturning Circulation (AMOC) embedded in Earth’s climate. Northward AMOC heat transport within this exchange mitigates the large heat loss to the atmosphere in the northern North Atlantic. Because of inadequate climate data, observational basin-scale studies of net interbasin exchange between the North and South Atlantic have been limited. Here ten independent climate datasets, five satellite-derived and five analyses, are synthesized to show that North and South Atlantic climatological net lateral volume exchange is partitioned into two seasonal regimes. From late-May to late-November, net lateral volume flux is from the North to the South Atlantic; whereas from late-November to late-May, net lateral volume flux is from the South to the North Atlantic. This climatological characterization offers a framework for assessing seasonal variations in these basins and provides a constraint for climate models that simulate AMOC dynamics.

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Low levels of persistent organic pollutants in sediments of the Doce River mouth, South Atlantic, before the Fundão dam failure

The Science of The Total Environment ◽

10.1016/j.scitotenv.2021.149882 ◽

2021 ◽

pp. 149882

Author(s):

Amanda Câmara de Souza ◽

Ana Caroline Cabral ◽

Josilene da Silva ◽

Renato Rodrigues Neto ◽

César C. Martins

Keyword(s):

Organic Pollutants ◽

Persistent Organic Pollutants ◽

River Mouth ◽

South Atlantic ◽

Dam Failure ◽

Low Levels ◽

Doce River

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The effects of climate change on persistent organic pollutants (POPs) in the North Sea

Ocean Science Discussions ◽

10.5194/osd-10-1525-2013 ◽

2013 ◽

Vol 10 (5) ◽

pp. 1525-1557

Author(s):

K. O'Driscoll ◽

B. Mayer ◽

J. Su ◽

M. Mathis

Keyword(s):

Climate Change ◽

Organic Pollutants ◽

North Sea ◽

21St Century ◽

Persistent Organic Pollutants ◽

Global Ocean ◽

Open Boundary ◽

The North ◽

The Future ◽

The North Sea

Abstract. The fate and cycling of two selected legacy persistent organic pollutants (POPs), PCB 153 and γ-HCH, in the North Sea in the 21st century have been modelled with combined hydrodynamic and fate and transport ocean models. To investigate the impact of climate variability on POPs in the North Sea in the 21st century, future scenario model runs for three 10 yr periods to the year 2100 using plausible levels of both in situ concentrations and atmospheric, river and open boundary inputs are performed. Since estimates of future concentration levels of POPs in the atmosphere, oceans and rivers are not available, our approach was to reutilise 2005 values in the atmosphere, rivers and at the open ocean boundaries for every year of the simulations. In this way, we attribute differences between the three 10 yr simulations to climate change only. For the HAMSOM and atmospheric forcing, results of the IPCC A1B (SRES) 21st century scenario are utilised, where surface forcing is provided by the REMO downscaling of the ECHAM5 global atmospheric model, and open boundary conditions are provided by the MPIOM global ocean model. Dry gas deposition and volatilisation of γ-HCH increase in the future relative to the present. In the water column, total mass of γ-HCH and PCB 153 remain fairly steady in all three runs. In sediment, γ-HCH increases in the future runs, relative to the present, while PCB 153 in sediment decreases exponentially in all three runs, but even faster in the future, both of which are the result of climate change. Annual net sinks exceed sources at the ends of all periods.

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Migration of exotic species of ammonites during highstands of sea level

The Paleontological Society Special Publications ◽

10.1017/s2475262200008844 ◽

1992 ◽

Vol 6 ◽

pp. 324-324

Author(s):

Keith Young

Keyword(s):

North America ◽

South America ◽

Exotic Species ◽

Sea Level ◽

South Atlantic ◽

Horn Of Africa ◽

Mozambique Channel ◽

The North ◽

North And South ◽

Early Late

In northeastern Chihuahua and Trans-Pecos Texas, in the early Late Albian zone of Hysteroceras varicosum occurs the Boeseites romeri (Haas) fauna with B. romeri (Hass), B. perarmata (Hass), B. aff. barbouri (Haas), B. cf. howelli (Haas), B.proteus (Haas), Prohysteroceras cf. P. hanhaense Haas, Elobiceras sp., and Dipoloceras (?) sp. B. perarmata has also been collected at Cerro Mercado, near Monclova, Coahuila. Haas originally described this fauna from Angola. Now, from rocks in the same zone in the Sierra Mojada, Coahuila, Mexico, there is a form related to if not identical with Hysteroceras famelicum Van Hoepen, also originally described from Angola and also from the zone of Hysteroceras varicosum.These fossils are known only from southern North America and Angola; they have not been described from the European Tethys. In 1984 I suggested that during the highstand of sea level of the early Late Albian (Hysteroceras varicosum zone) these ammonites migrated from Angola to Mexico and Trans-Pecos Texas via an epeiric seaway extending across the sag between South America and Africa proposed by Kennedy and Cooper. This would be twelve to fifteen million years prior to an oceanic connection between the North and South Atlantic.I would now ask, can similar epeiric seas and highstands of sea level explain the migration of successive European, Tethyan, Jurassic ammonite faunas down the Mozambique Channel and around the horn of Africa into the Neuquen Basin of Argentina before Africa and Antarctica separated, as proposed by Spath.

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Similarity in microbial amino acid uptake in surface waters of the North and South Atlantic (sub-)tropical gyres

Progress In Oceanography ◽

10.1016/j.pocean.2011.05.006 ◽

2011 ◽

Vol 91 (4) ◽

pp. 437-446 ◽

Cited By ~ 6

Author(s):

Polly G. Hill ◽

Isabelle Mary ◽

Duncan A. Purdie ◽

Mikhail V. Zubkov

Keyword(s):

Amino Acid ◽

Surface Waters ◽

Amino Acid Uptake ◽

South Atlantic ◽

Acid Uptake ◽

The North ◽

North And South

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Legacy and emergent persistent organic pollutants (POPs) in NW Mediterranean deep-sea organisms

The Science of The Total Environment ◽

10.1016/j.scitotenv.2012.10.111 ◽

2013 ◽

Vol 443 ◽

pp. 358-366 ◽

Cited By ~ 31

Author(s):

Samuel Koenig ◽

David Huertas ◽

Pilar Fernández

Keyword(s):

Organic Pollutants ◽

Persistent Organic Pollutants ◽

Deep Sea ◽

Nw Mediterranean

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Stalked crinoids (Echinodermata) collected by the R/V Polarstern and Meteor in the south Atlantic and in Antarctica

Zootaxa ◽

10.11646/zootaxa.3425.1.1 ◽

2012 ◽

Vol 3425 (1) ◽

pp. 1 ◽

Cited By ~ 5

Author(s):

MARC ELÉAUME ◽

JENS-MICHAEL BOHN ◽

MICHEL ROUX ◽

NADIA AMÉZIANE

Keyword(s):

North Atlantic ◽

Deep Sea ◽

South Atlantic ◽

The South ◽

The West ◽

Walvis Ridge ◽

The North ◽

West Antarctic ◽

Stalked Crinoids ◽

Hard Substrates

During the last decades, R/V Meteor and R/V Polarstern deep-sea investigations in the south Atlantic and neighbouringSouthern Ocean collected new samples of stalked crinoids belonging to the families Bathycrinidae, Phrynocrinidae andHyocrinidae which are herein described. The species found are Bathycrinus australis A.H. Clark, 1907b (the most abun-dant), Dumetocrinus aff. antarcticus (Bather, 1908), Hyocrinus bethellianus Thomson, 1876, Feracrinus heinzelleri newspecies, and Porphyrocrinus cf. incrassatus (Gislén, 1933). As only stalk fragments of bathycrinids were frequently col-lected, a distinction between the two Atlantic species B. australis and B. aldrichianus is proposed using characters of co-lumnal articulations. A few specimens attributed to Porphyrocrinus cf. incrassatus, Hyocrinus bethellianus and Hyocrinussp. collected by the N/O Jean Charcot on the Walvis Ridge are also described, plus a new specimen of Porphyrocrinusincrassatus collected in the central mid-Atlantic. Biogeography and close affinities between species in the genera Bathy-crinus and Porphyrocrinus suggest an Antarctic origin of some stalked crinoids among the north Atlantic deep-sea fauna.The presence of B. australis in both the Angola and Cape basins suggests that the Walvis Ridge is not a bio-geographicalbarrier for this relatively eurybathic species, which can attach to hard substrates as well as anchor in sediment. The genusDumetocrinus seems to be an example of colonization of the west Antarctic platform from deeper environment where its ancestor lived.

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