Dominance of mineral dust in aerosol light-scattering in the North Atlantic trade winds

Nature ◽  
1996 ◽  
Vol 380 (6573) ◽  
pp. 416-419 ◽  
Author(s):  
X. Li ◽  
H. Maring ◽  
D. Savoie ◽  
K. Voss ◽  
J. M. Prospero
Keyword(s):  
Light Scattering ◽  
North Atlantic ◽  
Mineral Dust ◽  
Trade Winds ◽  
Atlantic Trade ◽  
The North ◽  
The North Atlantic

The Shipping of the North Atlantic Cotton Trade in the Mid-Nineteenth Century

2000 ◽  
Author(s):  
Lars U. Scholl ◽  
Lars U. Scholl ◽  
Lars U. Scholl
Keyword(s):  
United States ◽  
North Atlantic ◽  
The United States ◽  
Southern States ◽  
Atlantic Trade ◽  
The North ◽  
Seasonal Characteristics ◽  
Arrival Dates ◽  
The North Atlantic ◽  
Cotton Trade

This essay analyses the North Atlantic Cotton Trade through records of cotton arrivals at Liverpool, using two sets of data from 1830-1832 and 1853-1855. Using Customs Bills of Entry, Williams presents data of cotton receipts from the United States to Liverpool; quantities of bales exported; numbers of vessels; origin ports of vessels; distinguishes between regular and occasional cotton traders; arrivals at Liverpool by nationality; and vessel tonnage. He determines that the majority of vessels participated in the cotton trade seasonally, and suggests that the cotton trade was not self-contained, but part of a complex interrelationship within the North Atlantic trade system, encompassing commodity dealings, shipping employment levels, and the seasonal characteristics of cargo. The conclusion requests further scholarly research into the pattern of ship movements in the Atlantic. Two appendices provide more data, concerning arrival dates of regular traders in Liverpool, and the month of departure of cotton vessels from Southern states.

Tropical Air–Sea Interactions Accelerate the Recovery of the Atlantic Meridional Overturning Circulation after a Major Shutdown

2007 ◽  
Vol 20 (19) ◽  
pp. 4940-4956 ◽  
Author(s):  
Uta Krebs ◽  
A. Timmermann
Keyword(s):  
Ocean Circulation ◽  
North Atlantic ◽  
Atlantic Meridional Overturning Circulation ◽  
Meridional Overturning Circulation ◽  
Tropical Atlantic ◽  
Trade Winds ◽  
The North ◽  
Salinity Anomaly ◽  
Meridional Overturning ◽  
The North Atlantic

Abstract Using a coupled ocean–sea ice–atmosphere model of intermediate complexity, the authors study the influence of air–sea interactions on the stability of the Atlantic Meridional Overturning Circulation (AMOC). Mimicking glacial Heinrich events, a complete shutdown of the AMOC is triggered by the delivery of anomalous freshwater forcing to the northern North Atlantic. Analysis of fully and partially coupled freshwater perturbation experiments under glacial conditions shows that associated changes of the heat transport in the North Atlantic lead to a cooling north of the thermal equator and an associated strengthening of the northeasterly trade winds. Because of advection of cold air and an intensification of the trade winds, the intertropical convergence zone (ITCZ) is shifted southward. Changes of the accumulated precipitation lead to the generation of a positive salinity anomaly in the northern tropical Atlantic and a negative anomaly in the southern tropical Atlantic. During the shutdown phase of the AMOC, cross-equatorial oceanic surface flow is halted, preventing dilution of the positive salinity anomaly in the North Atlantic. Advected northward by the wind-driven ocean circulation, the positive salinity anomaly increases the upper-ocean density in the deep-water formation regions, thereby accelerating the recovery of the AMOC considerably. Partially coupled experiments that neglect tropical air–sea coupling reveal that the recovery time of the AMOC is almost twice as long as in the fully coupled case. The impact of a shutdown of the AMOC on the Indian and Pacific Oceans can be decomposed into atmospheric and oceanic contributions. Temperature anomalies in the Northern Hemisphere are largely controlled by atmospheric circulation anomalies, whereas those in the Southern Hemisphere are strongly determined by ocean dynamical changes and exhibit a time lag of several decades. An intensification of the Pacific meridional overturning cell in the northern North Pacific during the AMOC shutdown can be explained in terms of wind-driven ocean circulation changes acting in concert with global ocean adjustment processes.

scholarly journals The North Atlantic trade with Iceland, Shetland, Orkney and the Faroes and the policy of the Hanseatic Diet (1369–1535)

AmS-Skrifter ◽  
2020 ◽  
pp. 27-42
Author(s):  
Rolf Hammel-Kiesow
Keyword(s):  
North Atlantic ◽  
The Public ◽  
Atlantic Trade ◽  
The North ◽  
Public Consumption ◽  
The North Atlantic ◽  
Atlantic Island

This paper explores the limits of the Hanseatic Diet’s ability to regulate Hanseatic trade with Iceland and the North Atlantic island groups of Shetland, Orkney and the Faroes*. It comes to the conclusion that the Hanseatic Diets prohibited direct commercial links to Shetland, Orkney and the Faroes consistently from 1416, but turned a blind eye to the Iceland trade. The reasons for this inconsistent policy were the necessity of maintaining the Bergen’s monopoly on the stockfish trade (which was also in the interest of the Danish-Norwegian crown),  while at the same time keeping the door open for Hanseatic merchants who were not active in the Bergen trade to forge commercial links with Iceland, albeit at their own risk. The representatives of the Hanseatic towns often preferred to leave an issue undecided, in order to keep as many options open as possible. The huge divergence in the interests of merchants and towns forced the Diet to dissemble, pursuing policies out of the public gaze which subverted the resolutions the Diet had passed for public consumption.

scholarly journals Detection of mineral dust over the North Atlantic Ocean and Africa with the Nimbus 7 TOMS

1999 ◽  
Vol 104 (D8) ◽  
pp. 9277-9291 ◽  
Author(s):  
I. Chiapello ◽  
J. M. Prospero ◽  
J. R. Herman ◽  
N. C. Hsu
Keyword(s):  
Atlantic Ocean ◽  
North Atlantic ◽  
North Atlantic Ocean ◽  
Mineral Dust ◽  
The North ◽  
The North Atlantic

scholarly journals The ships that headed north - an archaeological perspective

AmS-Skrifter ◽  
2020 ◽  
pp. 175-186
Author(s):  
Mike Belasus
Keyword(s):  
Fifteenth Century ◽  
North Atlantic ◽  
Flat Bottom ◽  
Archaeological Evidence ◽  
North West ◽  
Atlantic Trade ◽  
The North ◽  
The North Atlantic ◽  
Late Fifteenth ◽  
Building Methods

Information on ships that were used for the North Atlantic trade, mainly from Hamburg and Bremen, is scarce and, to date, has been completely derived from historical documents. This is problematic because the terms used for ship types do not represent technical definitions. As there is currently no direct archaeological evidence for the ships that headed north, finds of ships and ship timbers from other areas had been considered to offer a first glance into shipbuilding and the mechanisms of change in building methods. Two main building methods can be distinguished in the medieval period for sea-going and coastal craft: the bottom-based Bremen-type shipbuilding method and clinker shipbuilding methods. The new carvel shipbuilding method was established in the late fifteenth century in north-west Europe. The archaeological evidence shows that there was no immediate change over but that in many cases, there was instead a convergence to achieve flush carvel-built hulls. Considering the Bremen-type with its flat bottom and limited sailing abilities and the fact that the German merchants only started to participate in the North Atlantic trade in the late fifteenth century, the question arises of whether there were other technical issues that prevented them from this enterprise until they managed to gain the knowledge required to build ocean-going vessels that could withstand a journey of several weeks across the North Sea and Norwegian Sea.

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