Deep-Sea Pycnogonida from the North and South Atlantic Basins

1982 ◽  
pp. 1-54 ◽  
Author(s):  
C. A. Child
Keyword(s):  
Deep Sea ◽  
South Atlantic ◽  
The North ◽  
North And South

Observed seasonal regimes of North-South Atlantic Ocean interbasin exchange

2019 ◽  
Author(s):  
Hamed D. Ibrahim
Keyword(s):  
North Atlantic ◽  
Climate Models ◽  
South Atlantic ◽  
Meridional Overturning Circulation ◽  
Volume Flux ◽  
The South ◽  
The North ◽  
Basin Scale ◽  
Interbasin Exchange ◽  
North And South

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.

scholarly journals Migration of exotic species of ammonites during highstands of sea level

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.

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

2011 ◽  
Vol 91 (4) ◽  
pp. 437-446 ◽  
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

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

Zootaxa ◽  
2012 ◽  
Vol 3425 (1) ◽  
pp. 1 ◽  
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.

Link between the North and South Atlantic during the Heinrich events of the last glacial period

1999 ◽  
Vol 15 (12) ◽  
pp. 909-919 ◽  
Author(s):  
L. Vidal ◽  
R.R. Schneider ◽  
O. Marchal ◽  
T. Bickert ◽  
T.F. Stocker ◽  
...  
Keyword(s):  
South Atlantic ◽  
Glacial Period ◽  
Last Glacial Period ◽  
Last Glacial ◽  
Heinrich Events ◽  
The North ◽  
North And South ◽  
The Last Glacial

scholarly journals Anniversary Dinner 1962

1963 ◽  
Vol 18 (1) ◽  
pp. 1-9
Keyword(s):  
Royal Society ◽  
South Atlantic ◽  
The Past ◽  
The North ◽  
North And South

I am sure that the greatest honour that can befall an after-dinner speaker is to propose the toast to the Royal Society and I simply couldn’t imagine why the Royal Society chose a mere Admiral to propose the toast. Then I got hold o f their history and I found out how much they depended on Admirals in the past. In the last two hundred years, forty-six o f the most distinguished Fellows of the Royal Society have been Admirals. The only Fellow of the Royal Society about whom a film has been made twice, was in fact a young Captain who also became an Admiral and a Fellow of the Royal Society. One was made before the war and there’s one in London now; you can see it in glorious technicolour and cinemascope. It’s about a man called William Bligh who had some trouble on the Bounty. But it wasn’t only Admirals who became Fellows of the Royal Society, because in those days there were also Captains. Edmund Halley, Astronomer Royal, commanded one of His Majesty’s Ships in 1698, with orders to traverse the North and South Atlantic Oceans in order to survey compass directions.

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