scholarly journals Influences of atmospheric transport pathways on radionuclide activities in aerosol particles from over the North Atlantic

1999 ◽  
Vol 104 (D17) ◽  
pp. 21301-21316 ◽  
Author(s):  
R. Arimoto ◽  
J. A. Snow ◽  
W. C. Graustein ◽  
J. L. Moody ◽  
B. J. Ray ◽  
...  
Keyword(s):  
North Atlantic ◽  
Atmospheric Transport ◽  
Aerosol Particles ◽  
Transport Pathways ◽  
The North ◽  
The North Atlantic

Atmospheric transport of polychlorobiphenyls to the North Atlantic

1974 ◽  
Vol 8 (8) ◽  
pp. 777-782 ◽  
Author(s):  
George R. Harvey ◽  
William G. Steinhauer
Keyword(s):  
North Atlantic ◽  
Atmospheric Transport ◽  
The North ◽  
The North Atlantic

scholarly journals Heat transport pathways into the Arctic and their connections to surface air temperatures

2019 ◽  
Vol 19 (6) ◽  
pp. 3927-3937 ◽  
Author(s):  
Daniel Mewes ◽  
Christoph Jacobi
Keyword(s):  
North Atlantic ◽  
North Pacific ◽  
Large Scale ◽  
The Arctic ◽  
Positive Temperature ◽  
Transport Pathways ◽  
Temperature Anomalies ◽  
The North ◽  
The North Atlantic ◽  
The North Pacific

Abstract. Arctic amplification causes the meridional temperature gradient between middle and high latitudes to decrease. Through this decrease the large-scale circulation in the midlatitudes may change and therefore the meridional transport of heat and moisture increases. This in turn may increase Arctic warming even further. To investigate patterns of Arctic temperature, horizontal transports and their changes in time, we analysed ERA-Interim daily winter data of vertically integrated horizontal moist static energy transport using self-organizing maps (SOMs). Three general transport pathways have been identified: the North Atlantic pathway with transport mainly over the northern Atlantic, the North Pacific pathway with transport from the Pacific region, and the Siberian pathway with transport towards the Arctic over the eastern Siberian region. Transports that originate from the North Pacific are connected to negative temperature anomalies over the central Arctic. These North Pacific pathways have been becoming less frequent during the last decades. Patterns with origin of transport in Siberia are found to have no trend and show cold temperature anomalies north of Svalbard. It was found that transport patterns that favour transport through the North Atlantic into the central Arctic are connected to positive temperature anomalies over large regions of the Arctic. These temperature anomalies resemble the warm Arctic–cold continents pattern. Further, it could be shown that transport through the North Atlantic has been becoming more frequent during the last decades.

NAPTRAM - Plastiktransportmechanismen, Senken und Interaktionen mit Biota im Nordatlantik / NAPTRAM - North Atlantic plastic transport mechanisms, sinks, and interactions with biota, Cruise No. SO279, Emden (Germany) – Emden (Germany), 04.12.2020 – 05.01.2021

2021 ◽  
Author(s):  
Aaron Beck
Keyword(s):  
Water Column ◽  
North Atlantic ◽  
Surface Waters ◽  
Open Ocean ◽  
Transport Pathways ◽  
The North ◽  
The North Atlantic ◽  
Vertical Export ◽  
Core Questions ◽  
Ocean Gyre

The coastal and open oceans represent a major, but yet unconstrained, sink for plastics. It is likely that plastic-biota interactions are a key driver for the fragmentation, aggregation, and vertical transport of plastic litter from surface waters to sedimentary sinks. Cruise SO279 conducted sampling to address core questions of microplastic distribution in the open ocean water column, biota, and sediments. Seven stations were sampled between the outer Bay of Biscay and the primary working area south of the Azores. Additional samples were collected from surface waters along the cruise track to link European coastal and shelf waters with the open ocean gyre. Microplastic samples coupled with geochemical tracer analyses will build a mechanistic understanding of MP transport and its biological impact reaching from coastal seas to the central gyre water column and sinks at the seabed. Furthermore, floating plastics were sampled for microbial community and genetic analyses to investigate potential enzymatic degradation pathways. Cruise SO279 served as the third cruise of a number of connected research cruises to build an understanding of the transport pathways of plastic and microplastic debris in the North Atlantic from the input through rivers and air across coastal seas into the accumulation spots in the North Atlantic gyre and the vertical export to its sink at the seabed. The cruise was an international effort as part of the JPI Oceans project HOTMIC (“HOrizontal and vertical oceanic distribution, Transport, and impact of MICroplastics”) and the BMBF funded project PLASTISEA (‘Harvesting the marine Plastisphere for novel cleaning concepts’), and formed a joint effort of HOTMIC and PLASTISEA researchers from a range of countries and institutes.

scholarly journals Compositional variations of sea-salt-mode aerosol particles from the North Atlantic

1995 ◽  
Vol 100 (D11) ◽  
pp. 23063 ◽  
Author(s):  
Mihály Pósfai ◽  
James R. Anderson ◽  
Peter R. Buseck ◽  
Herman Sievering
Keyword(s):  
North Atlantic ◽  
Aerosol Particles ◽  
Sea Salt ◽  
The North ◽  
The North Atlantic ◽  
Compositional Variations

scholarly journals Near-Surface Transport Pathways in the North Atlantic Ocean: Looking for Throughput from the Subtropical to the Subpolar Gyre

2011 ◽  
Vol 41 (5) ◽  
pp. 911-925 ◽  
Author(s):  
Irina I. Rypina ◽  
Lawrence J. Pratt ◽  
M. Susan Lozier
Keyword(s):  
North Atlantic ◽  
Gulf Stream ◽  
Subpolar Gyre ◽  
Fluid Exchange ◽  
Transport Barrier ◽  
Transport Pathways ◽  
Near Surface ◽  
Surface Transport ◽  
The North ◽  
The North Atlantic

Abstract Motivated by discrepancies between Eulerian transport estimates and the behavior of Lagrangian surface drifters, near-surface transport pathways and processes in the North Atlantic are studied using a combination of data, altimetric surface heights, statistical analysis of trajectories, and dynamical systems techniques. Particular attention is paid to the issue of the subtropical-to-subpolar intergyre fluid exchange. The velocity field used in this study is composed of a steady drifter-derived background flow, upon which a time-dependent altimeter-based perturbation is superimposed. This analysis suggests that most of the fluid entering the subpolar gyre from the subtropical gyre within two years comes from a narrow region lying inshore of the Gulf Stream core, whereas fluid on the offshore side of the Gulf Stream is largely prevented from doing so by the Gulf Stream core, which acts as a strong transport barrier, in agreement with past studies. The transport barrier near the Gulf Stream core is robust and persistent from 1992 until 2008. The qualitative behavior is found to be largely independent of the Ekman drift.

scholarly journals Reconstructing drainage pathways in the North Atlantic during the Triassic utilizing heavy minerals, mineral chemistry, and detrital zircon geochronology

Geosphere ◽  
2021 ◽  
Vol 17 (2) ◽  
pp. 479-500
Author(s):  
Steven D. Andrews ◽  
Andrew Morton ◽  
Audrey Decou ◽  
Dirk Frei
Keyword(s):  
North Atlantic ◽  
Detrital Zircon ◽  
Heavy Minerals ◽  
Zircon Geochronology ◽  
Reservoir Prediction ◽  
Transport Pathways ◽  
Detrital Zircon Geochronology ◽  
Tethys Sea ◽  
The North ◽  
The North Atlantic

Abstract In this study, single-grain mineral geochemistry, detrital zircon geochronology, and conventional heavy-mineral analysis are used to elucidate sediment transport pathways that existed in the North Atlantic region during the Triassic. The presence of lateral and axial drainage systems is identified and their source regions are constrained. Axial systems are suggested to have likely delivered sediment sourced in East Greenland (Milne Land–Renland) as far south as the south Viking Graben (>800 km). Furthermore, the data highlight the existence of lateral systems issuing from Western Norway and the Shetland Platform as well as a major east-west–aligned drainage divide positioned adjacent to the Milne Land–Renland region. This divide separated the catchments that flowed north to the Boreal Ocean from those that flowed south into a series of endoreic basins and, ultimately, the Tethys Sea. A further potential drainage divide is identified to the west of Shetland. The data presented and the conclusions reached have major implications for reservoir prediction, as well as correlation, throughout the region. Furthermore, understanding the drainage networks that existed during the Triassic can help constrain paleogeographic reconstructions and provides an important framework for the construction of facies models in the region.

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