scholarly journals Hydrodynamic Variability in a Microtidal Coastal Bay Geographically Susceptible to North East Trade Winds

2016 ◽  
Vol 27 (1) ◽  
Author(s):  
Israel Medina-Gómez ◽  
Cecilia Enríquez ◽  
Björn Kjerfve ◽  
Ismael Mariño ◽  
Jorge Herrera-Silveira
Keyword(s):  
Trade Winds ◽  
North East ◽  
Coastal Bay

Dust transported in the North-east and South-east Trade Winds in the Atlantic Ocean

Nature ◽  
1971 ◽  
Vol 233 (5320) ◽  
pp. 474-476 ◽  
Author(s):  
R. CHESTER ◽  
H. ELDERFIELD ◽  
J. J. GRIFFIN
Keyword(s):  
Atlantic Ocean ◽  
Trade Winds ◽  
North East ◽  
The North

scholarly journals Triassic rift sedimentation and palaeogeography of central East Greenland

1980 ◽  
Vol 136 ◽  
pp. 1-72
Author(s):  
L.B Clemmensen
Keyword(s):  
Continental Drift ◽  
Alluvial Fan ◽  
Late Triassic ◽  
Climate Trend ◽  
Trade Winds ◽  
Flood Plains ◽  
Braided Rivers ◽  
North East ◽  
Facies Associations ◽  
Lacustrine Facies

The majority of the investigated Triassic (upper(?) Scythian – Rhaetian) rocks apparently formed in continental environments comprising alluvial fans, braided rivers, aeolian deserts, flood plains, saline playa lakes and freshwater shallow lakes. In the Middle Triassic a brief but widespread marine transgression affected large parts of the basin and resulted in the deposition of barrier limestones and lagoonal mudstones. Details of sedimentary structures, bed types, facies sequences and vertical and lateral variations are discussed for each of these environments. Special emphasis is given to the remarkable variety of lacustrine facies associations. The Triassic sediments probably accumulated in a N-S trending rift valley. This fault controlled depositional basin apparently formed in connection with overall rifting of the 'Laurasian' megacontinent. Tectonic movements along N-S trending fault lines appear to have been an important control on the thickness and nature of the Triassic facies, and the basal alluvial fan sediments formed simultaneously with or slightly after tectonic uplift of the borderlands. The climate throughout the Middle-Late Triassic period was warm and subtropical with alternating dry and wet seasons. The basin was under the influence of dominant north-east trade winds (winter) and less common south-east trade winds (summer). The vertical succession of climate-sensitive rocks further suggests a gradual shift towards increased humidity during the Middle-Late Triassic times. This climate trend is explained by a northwards continental drift of the area.

Atlantic Winds and Ocean Currents in Portuguese Nautical Documents of the Sixteenth Century

1972 ◽  
Vol 73 ◽  
pp. 59-67 ◽  
Author(s):  
A. Teixeira da Mota
Keyword(s):  
Sixteenth Century ◽  
Fifteenth Century ◽  
North Atlantic ◽  
Trade Winds ◽  
Wind Variability ◽  
North East ◽  
The North ◽  
Physical Phenomena ◽  
First Time ◽  
Current Systems

SynopsisThe idea that only after 1490 the European sailors had ‘come for the first time in recorded history to struggle with the limitations placed on sailing ships by the winds and currents of the open ocean’ does not correspond to reality. There is enough proof to show that much earlier, in the fifteenth century, the North-East Trades’ regularity, the wind variability in the zone directly north of them, and the Canaries Current were already known. When the fifteenth century ended, the Portuguese had already verified the symmetry of wind patterns in the Atlantic on both sides of the equatorial calm zone, which led them to apply the significant name of ‘ventos gerais’ to the trade winds of both hemispheres.Accurate knowledge of the wind and current systems was essential to good navigation and the Portuguese ratters of the sixteenth century, chiefly ‘carreira da India’ rutters, include an increasing amount of information on that subject, referring especially to zones in the passage from the North Atlantic to the South Atlantic. The report of a voyage (1503) proves that at that time the Portuguese already knew the Gulf of Guinea winds and currents sufficiently well. As a result of oceanic sailing, the traditional ratters, exclusively coastal, developed considerably, not only by adding data about latitudes and compass variations but also by the indication of winds and currents. There appeared also an even newer type of ratter, the ‘oceanic rutter‘, in which the safest and quickest routes, because of the changeability of winds and current patterns, are indicated.Information about elements concerning winds and currents which are included in the Portuguese ratters was revealed in printed matter after the end of the sixteenth century and this allowed some European scientists to study, because of the availability of better information, the causes of those physical phenomena, which had already been treated briefly in the sixteenth century by two nautical treatise writers, D. João de Castro and Father Fernando Oliveira.

Temporal evolution of sea surface temperatures in the coastal upwelling off North Africa

2021 ◽  
Author(s):  
Marie-Alexandrine Sicre ◽  
Eva Moreno ◽  
Vincent Klein ◽  
Anna Alves ◽  
Simon Puaud
Keyword(s):  
Coastal Upwelling ◽  
Southwest Monsoon ◽  
Sea Surface ◽  
Sea Surface Temperatures ◽  
Sediment Grain Size ◽  
Trade Winds ◽  
North West ◽  
North East ◽  
Surface Temperatures ◽  
Monsoon Winds

<p>This study presents new high-resolution reconstructions of sea surface temperatures (SSTs) obtained from alkenones off the coast of North West Africa between 19 °N and xx 27°N latitude. Sediment grain-size distributions were also generated to provide new information on the Moroccan and Mauritanian upwelling zone over the Industrial Era. Our data shows that over the past two centuries, SSTs gradually increased in the southernmost cores, while in the northernmost sites they show cooling. Changes in sea level pressure and temperature gradients between land and sea would have caused major changes in atmospheric circulation by disrupting and intensifying the system of North-East winds (Trade winds) and southwest Monsoon winds. With global warming, increase in the monsoon might be expected, causing the weakening easterly winds favorable to the formation of upwellings. Enhanced stratification of the water column would prevent upwelling to develop accounting for surface water warming with consequences on the ecosystems and fisheries.</p>

Ras al Khaimah: further archaeological discoveries

Antiquity ◽  
1976 ◽  
Vol 50 (200) ◽  
pp. 216-222
Author(s):  
Beatrice De Cardi
Keyword(s):  
United Arab Emirates ◽  
The State ◽  
Focused Attention ◽  
North East ◽  
The North ◽  
History Of ◽  
The City

Ras a1 Khaimah is the most northerly of the seven states comprising the United Arab Emirates and its Ruler, H. H. Sheikh Saqr bin Mohammad al-Qasimi, is keenly interested in the history of the state and its people. Survey carried out there jointly with Dr D. B. Doe in 1968 had focused attention on the site of JuIfar which lies just north of the present town of Ras a1 Khaimah (de Cardi, 1971, 230-2). Julfar was in existence in Abbasid times and its importance as an entrep6t during the sixteenth and seventeenth centuries-the Portuguese Period-is reflected by the quantity and variety of imported wares to be found among the ruins of the city. Most of the sites discovered during the survey dated from that period but a group of cairns near Ghalilah and some long gabled graves in the Shimal area to the north-east of the date-groves behind Ras a1 Khaimah (map, FIG. I) clearly represented a more distant past.

Prevalence of cerebral palsy in north-east Italy from 1965 to 1989

1999 ◽  
Vol 41 (1) ◽  
pp. 26-39 ◽  
Author(s):  
Michele Bottos ◽  
Tatiana Granato ◽  
Giuseppa Allibrio ◽  
Caterina Gioachin ◽  
Maria Luisa Puato
Keyword(s):  
Cerebral Palsy ◽  
North East

Lichens in the North-East regions of Cyprus

1999 ◽  
Vol 110 (5-6) ◽  
pp. 455-463 ◽  
Author(s):  
S. Güvenç ◽  
Ş Öztürk
Keyword(s):  
North East ◽  
The North
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