scholarly journals Distribution of suspended matter off the western coast of the crimea under impact of the strong winds of various directions

2019 ◽  
pp. 74-88
Author(s):  
A. A. Aleskerovа ◽  
A. A. Kubryakov ◽  
Yu. N. Goryachkin ◽  
S. V. Stanichny ◽  
A. V. Garmashov
Keyword(s):  
Bottom Sediments ◽  
West Coast ◽  
Suspended Matter ◽  
Cold Water ◽  
Western Coast ◽  
Wave Impact ◽  
The West ◽  
The North ◽  
The Crimea ◽  
Strong Winds

The mechanisms of formation and distribution of total suspended matter (tsm) off the West Coast of Crimea under the influence of strong winds of various directions were investigated on the base of satellite data of medium and high resolution. The maximum tsm reaching the values of 200 mg / l was is observed during strong southern winds. In this case, the zone of high tsm is located at the western shelf of the Crimea limited by a 50 m isobath. The wave impact on resuspension of bottom sediments and the erosion of clay cliffs located on the west coast of Crimea lead to the formation of a large amount of tsm. After the storm, a northern alongshore current transfers tsm to the north. During northeast winds, the highest tsm are observed not near the coast, but in the seaward part of the shelf between 30 and 50 m isobaths. It is likely that turbulent mixing during such winds resuspense bottom sediments in shallow areas, which are further transported from the coast due to the offshore winds. The wind surge in this case leads to the formation of a band of clean cold water near the coast. A specific feature of the action of the northern and northwestern storms is the formation of a longshore jet stream along the western coast. The current occurs at the front of the upwelling zone. The stream transports the suspended matter offshore southward. The concentration of the suspended matter in this case is also much lower than when exposed to the southern winds, but it can reach a value of 3 mg/l.

scholarly journals Evidence of Unknown Paleo-Tsunami Events along the Alas Strait, West Sumbawa, Indonesia

Geosciences ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 46
Author(s):  
Bachtiar W. Mutaqin ◽  
Franck Lavigne ◽  
Patrick Wassmer ◽  
Martine Trautmann ◽  
Puncak Joyontono ◽  
...  
Keyword(s):  
Radiocarbon Dating ◽  
Pyroclastic Flows ◽  
Western Coast ◽  
Eastern Shore ◽  
Tsunami Deposits ◽  
The West ◽  
Marine Deposits ◽  
Sedimentary Records ◽  
The North ◽  
Large Earthquakes

Indonesia is exposed to earthquakes, volcanic activities, and associated tsunamis. This is particularly the case for Lombok and Sumbawa Islands in West Nusa Tenggara, where evidence of tsunamis is frequently observed in its coastal sedimentary record. If the 1815 CE Tambora eruption on Sumbawa Island generated a tsunami with well-identified traces on the surrounding islands, little is known about the consequences of the 1257 CE tremendous eruption of Samalas on the neighboring islands, and especially about the possible tsunamis generated in reason of a paucity of research on coastal sedimentary records in this area. However, on Lombok Island, the eruption of the Samalas volcano produced significant volumes of pyroclastic flows that entered the sea in the North and East of the island. These phenomena must have produced a tsunami that left their traces, especially on Sumbawa Island, whose western coastline is only 14 km away from Lombok’s eastern shore. Therefore, the main goal of this study is to investigate, find evidence, and determine the age of marine-origin sediments along the shore of the Alas Strait, Indonesia. We collected and analyzed samples of coral and seashells from marine deposits identified along the west coast of Sumbawa, i.e., in Belang Island and abandoned fishponds in Kiantar Village, in order to identify the sources and the occurrence period of these deposits events. Based on the radiocarbon dating of coral and seashell samples, we concluded that none of the identified marine deposits along the western coast of Sumbawa could be related chronologically to the 1257 CE eruption of Samalas. However, possible tsunami deposits located in Belang Island and abandoned fishponds in Kiantar Village yielded 4th century CE, 9th century CE, and 17th century CE. We also conclude that past large earthquakes triggered these tsunamis since no known volcanic eruption occurred near the Alas Strait at that time that may have triggered a tsunami.

scholarly journals ROME AT SEA: THE BEGINNINGS OF ROMAN NAVAL POWER

2017 ◽  
Vol 64 (1) ◽  
pp. 14-26 ◽  
Author(s):  
W. V. Harris
Keyword(s):  
West Coast ◽  
Asia Minor ◽  
North Coast ◽  
The West ◽  
Naval Power ◽  
The North

Between the Battle of Mylae in 260 bc (when Rome defeated Carthage off the north coast of Sicily) and the Battle of Myonnesus in 190 (when Rome defeated the Seleucid navy off the west coast of Asia Minor), the Romans established naval domination over the whole Mediterranean. Scholars generally believe, for quite good reasons, that this process of naval aggrandisement began abruptly, the Romans having previously taken no interest in the sea. That, after all, is what Polybius quite clearly says.

The Lower Jurassic phosphorites of southeastern British Columbia and terrane accretion to western North America

1989 ◽  
Vol 26 (8) ◽  
pp. 1612-1616 ◽  
Author(s):  
T. P. Poulton ◽  
J. D. Aitken
Keyword(s):  
British Columbia ◽  
North America ◽  
Oceanic Crust ◽  
West Coast ◽  
Cold Water ◽  
Lower Jurassic ◽  
Depositional Model ◽  
Western North America ◽  
The West ◽  
Terrane Accretion

Sinemurian phosphorites in southeastern British Columbia and southwestern Alberta conform with the "West Coast type" phosphorite depositional model. The model indicates that they were deposited on or near the Early Jurassic western cratonic margin, next to a sea or trough from which cold water upwelled. This suggests that the allochthonous terrane Quesnellia lay well offshore in Sinemurian time. The sea separating Quesnellia from North America was partly floored by oceanic crust ("Eastern Terrane") and partly by a thick sequence of rifted, continental terrace wedge rocks comprising the Purcell Supergroup and overlying Paleozoic sequence. This sequence must have been depressed sufficiently that access of upwelling deep currents to the phosphorite depositional area was not impeded.

Military Operations on the North Front of Mount Taurus. IV.—The Campaigns of 319 and 320 B.C

1923 ◽  
Vol 43 (1) ◽  
pp. 1-10 ◽  
Author(s):  
William Mitchell Ramsay
Keyword(s):  
West Coast ◽  
Asia Minor ◽  
Great Length ◽  
Military Operations ◽  
The West ◽  
Full Account ◽  
The Road ◽  
The North

In a footnote in J.H.S. 1918, p. 144, I stated the view that the battle (319 B.C.) in which Antigonus defeated Alketas and the associated generals took place in the αὐλὼν which leads from the N.E. corner of the Limnai towards Pisidian Antioch, carrying the southern or Pisidian road across Asia Minor eastward. This important route, regarded as a highway from the west coast to the Cilician Gates, is a recent discovery, though parts of it have been often described and traversed. In J.H.S. 1920, p. 89 f., I have argued that it was the road by which Xerxes' great army marched from Kritalla to Kelainai.There are two authorities on whom we depend for details of the battle of 319 B.C., Polyaenus Strat. 4, 6, 7 and Diodorus 18, 44; but both of these gather all their information from that excellent military writer Hieronymus of Cardia, the friend and historian of Eumenes. Polyaenus tells the story with soldierly brevity, relating only the chief military features: Diodorus diffusely and at great length; but so that we can recognise Hieronymus behind and beneath, and restore the full account as given by that writer.

PASTURE SEED MIXTURE FOR HIGH RAINFALL DISTRICTS

1937 ◽  
pp. 71-78
Author(s):  
A. Stuart
Keyword(s):  
West Coast ◽  
The South ◽  
The West ◽  
High Rainfall ◽  
The North ◽  
Seed Mixture ◽  
Rainfall Map

In dealing with this subject it is essential to define the high rainfall districts, and on, perusing a rainfall map it was found, contrary to expectations, that the greater part of the North Island, as represented by the Auckland Province and Taranaki, has a rainfall of over 50 inches per annum. In the same category falls the West Coast of the South Island and all of Stewart Island.

scholarly journals The Timeless African and the Versatile Indian in Seventeenth-Century Travelogues

2005 ◽  
Vol 14 (1) ◽  
pp. 23-44
Author(s):  
Michel Duquet
Keyword(s):  
Seventeenth Century ◽  
North America ◽  
American Indian ◽  
West Coast ◽  
Tropical Environment ◽  
The West ◽  
The North ◽  
Native Populations ◽  
French And English ◽  
North American Indian

Abstract The seventeenth century saw the early stages of significant trading on the west coast of Africa as well as the establishment of permanent settlements in North America by Dutch, French and English explorers, merchants, colonists and missionaries in a period marked by the imperial contest that had been set in motion on the heels of the discovery of America in 1492. The travelers who wrote about their voyages overseas described at length the natives they encountered on the two continents. The images of the North American Indian and of the African that emerged from these travel accounts were essentially the same whether they be of Dutch, French or English origin. The main characteristic in the descriptions of African native populations was its permanent condemnation while representations of the Indian were imbued with sentiments ranging from compassion, censure and admiration. The root causes for this dichotomy were the inhospitable and deadly (to Europeans) tropical environment of Africa’s West Coast and the growing knowledge of local societies that Europeans acquired in North America. The analysis of the contrasting images of natives on both sides of the Atlantic and the context within which they were produced are the focus of the paper.

scholarly journals Changes in Winter Atmospheric Rivers along the North American West Coast in CMIP5 Climate Models

2015 ◽  
Vol 16 (1) ◽  
pp. 118-128 ◽  
Author(s):  
Michael D. Warner ◽  
Clifford F. Mass ◽  
Eric P. Salathé
Keyword(s):  
Water Vapor ◽  
North American ◽  
West Coast ◽  
American West ◽  
Climate Models ◽  
Water Vapor Transport ◽  
The West ◽  
North American West ◽  
The North ◽  
Extreme Precipitation Events

Abstract Most extreme precipitation events that occur along the North American west coast are associated with winter atmospheric river (AR) events. Global climate models have sufficient resolution to simulate synoptic features associated with AR events, such as high values of vertically integrated water vapor transport (IVT) approaching the coast. From phase 5 of the Coupled Model Intercomparison Project (CMIP5), 10 simulations are used to identify changes in ARs impacting the west coast of North America between historical (1970–99) and end-of-century (2070–99) runs, using representative concentration pathway (RCP) 8.5. The most extreme ARs are identified in both time periods by the 99th percentile of IVT days along a north–south transect offshore of the coast. Integrated water vapor (IWV) and IVT are predicted to increase, while lower-tropospheric winds change little. Winter mean precipitation along the west coast increases by 11%–18% [from 4% to 6% (°C)−1], while precipitation on extreme IVT days increases by 15%–39% [from 5% to 19% (°C)−1]. The frequency of IVT days above the historical 99th percentile threshold increases as much as 290% by the end of this century.

Ghana

2020 ◽  
Author(s):  
Marius Schneider ◽  
Vanessa Ferguson
Keyword(s):  
Burkina Faso ◽  
West Coast ◽  
Ivory Coast ◽  
North Atlantic Ocean ◽  
The West ◽  
Artificial Reservoir ◽  
The North ◽  
The World ◽  
The North Atlantic ◽  
The Republic

The Republic of Ghana is a country located on the west coast of Africa on the Gulf of Guinea, bordering the North Atlantic Ocean, Burkina Faso, Ivory Coast, and Togo. Ghana has a total area of 238,535 square kilometres (km), a coastline of 539 km in length, and a population of 29.6 million. Ghana is home to Lake Volta, the largest artificial reservoir in the world in terms of surface area, situated approximately 200 km from Ghana’s border with Burkina Faso.

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