The General Oceanography of the Strait of Belle Isle

1954 ◽  
Vol 11 (3) ◽  
pp. 198-260 ◽  
Author(s):  
A. G. Huntsman ◽  
W. B. Bailey ◽  
H. B. Hachey
Keyword(s):  
Shallow Water ◽  
The South ◽  
Hydrographic Data ◽  
Arctic Water ◽  
Tidal Period ◽  
North Shore ◽  
The North ◽  
Labrador Current ◽  
South Shore ◽  
North And South

Hydrographic data for late August, 1923, show for the Strait (a) progressive inward movement on the north side of Arctic or sub-Arctic water, (b) progressive outward movement on the south side of Gulf water and (c) a dominant outward flow with evidence of a previous dominant inward flow. Time differences suggest tidal causes for the marked temperature and salinity changes. Current measurements for a double tidal period indicate residual trends of nine and eight miles per day in opposite directions on the north and south sides of the Strait. Inside, the Esquiman Channel shows two contra-clockwise eddies north and south of the Mekattina Bank. In addition, hydrographic data show a strong northeasterly movement along the Newfoundland shore and a weaker southwesterly one along the opposite Quebec shore.Planktonic animals indicate the water movements, Mertensia, Acartia spiniremis, Themisto, Pseudalibrotus and Oikopleura vanhöffeni surviving to various degrees in the water from the Labrador Current that reaches the centre of the Gulf along the north shore of the Strait and Channel. Other forms characterize the warm shallow water along the Newfoundland shore inside the Strait and show its movement outward to the east coast of Newfoundland. The Greenland seal fishery of winter reflects the inward movement from the Labrador Current. Cod and herring fisheries invade this cool water of the north shore only locally in summer with access of warmer water from the south shore. Lobsters and cunners are very abundant in, but particularly confined to, the warm shallow water mentioned above.

Preliminary interpretation of the first refraction arrivals in Gaspé from shots in Labrador and Quebec

1969 ◽  
Vol 6 (4) ◽  
pp. 771-774 ◽  
Author(s):  
Douglas S. Rankin ◽  
Ravi Ravindra ◽  
David Zwicker
Keyword(s):  
Upper Mantle ◽  
Arrival Time ◽  
The South ◽  
North Shore ◽  
The North ◽  
A Value ◽  
South Shore ◽  
Compressional Velocity ◽  
St Lawrence River

Previous work in the Gulf of St. Lawrence has yielded an unusually high upper-mantle compressional velocity. In the Gaspé area a more recent determination has yielded a value of 8.75 ± 0.20 km/s for an unreversed profile. The arrival time at a station on the north shore of the St. Lawrence River suggests that there is no major difference in velocity and depth relative to the south shore.

Pseudomorphs of pyrrhotine after pyrite in the Ballachulish slates

1950 ◽  
Vol 29 (210) ◽  
pp. 234-238 ◽  
Author(s):  
Henrich Neumann
Keyword(s):  
Single Crystals ◽  
The Other ◽  
The South ◽  
The North ◽  
Loch Leven ◽  
Other Hand ◽  
Dark Colour ◽  
South Shore ◽  
North And South

The Ballachulish slates, exposed to the north and south of Loch Leven in Argyllshire, contain, in most places, cubes of pyrite up to half an inch in diameter. During a visit to the area in the spring of 1949 the writer's attention was attracted by the dark colour of the 'pyrite' cubes in the North Ballaehulish slate quarry a little more than a mile east of Onich. On examination these proved to consist of a mass of haphazardly orientated crystals of pyrrhotine with irregular outlines. Slates collected from the main working quarry on the south shore of Loch Leven, on the other hand, contain cubes which are single crystals of unaltered pyrite.

scholarly journals La mer de Goldthwait au Québec

2010 ◽  
Vol 31 (1-2) ◽  
pp. 61-80 ◽  
Author(s):  
Jean-Claude Dionne
Keyword(s):  
Quebec City ◽  
The South ◽  
Lawrence Estuary ◽  
Marine Invasion ◽  
North Shore ◽  
The North ◽  
Upper Limit ◽  
South Shore ◽  
Anticosti Island ◽  
St Lawrence Estuary

The Goldthwait Sea is defined as the late- and post-Glacial marine invasion in the St. Lawrence Estuary and Gulf east of Québec City. In Québec, this sea has submerged an area of about 25 000 km2. The largest areas submerged are the north shore of the St. Lawrence between Les Escoumins and Blanc-Sablon, the south shore between Levis and Tourelles, and the Anticosti Island. The upper limit of the Goldthwait Sea varies from place to place. The Goldthwait Sea began 14 000 years ago and land emergence is still in progress, since the pre-Wisconsin marine level has not been recovered yet. For a better chronology, this long interval needs to be subdivided. Three main periods have been recognized: Goldthwaitian I, II and III. However, a geographical subdivision is also needed. Numerous shorelines were observed at various elevations throughout the area formely submerged by the Goldthwait Sea. However, only a few shorelines are well developed and extensive, and correlations between former shorelines are difficult to establish. Only three levels are widespead and common to the Estuary and parts of the Gulf. The isostatic recovery has been rapid during the first three thousand years after déglaciation of the area: about 75%.

scholarly journals Impacts of Agricultural Areas on Spatio-Temporal Variability of Daily Minimum Extreme Flows during the Transitional Seasons (Spring and Fall) in Southern Quebec

Water ◽  
2021 ◽  
Vol 13 (24) ◽  
pp. 3487
Author(s):  
Ali Arkamose Assani ◽  
Ayoub Zeroual ◽  
Alexandre Roy ◽  
Christophe Kinnard
Keyword(s):  
Temporal Variability ◽  
The South ◽  
Extreme Flows ◽  
North Shore ◽  
Daily Minimum ◽  
The North ◽  
South Shore ◽  
Spatio Temporal ◽  
The 1960S ◽  
Agricultural Areas

Several statistical methods were used to analyze the spatio-temporal variability of daily minimum extreme flows (DMEF) in 17 watersheds—divided into three homogenous hydroclimatic regions of southern Quebec—during the transitional seasons (spring and fall), during the 1930–2019 period. Regarding spatial variability, there was a clear difference between the south and north shores of the St. Lawrence River, south of 47° N. DMEF were lower in the more agricultural watersheds on the south shore during transitional seasons compared to those on the north shore. A correlation analysis showed that this difference in flows was mainly due to more agricultural areas ((larger area (>20%) on the south than on the north shore (<5%)). An analysis of the long-term trend of these flows showed that the DMEF of south-shore rivers have increased significantly since the 1960s, during the fall (October to December), due to an increase in rainfall and a reduction in cultivated land, which increased the infiltration in the region. Although there was little difference between the two shores in the spring (April to June), we observed a decrease in minimum extreme flows in half (50%) of the south-shore rivers located north of 47° N.

Relationship between the Atlantic Multidecadal Oscillation index and variability of mean annual flows for catchments in the St. Lawrence watershed (Quebec, Canada) during the past century

2010 ◽  
Vol 41 (2) ◽  
pp. 115-125 ◽  
Author(s):  
Ali A. Assani ◽  
David Landais ◽  
Mhamed Mesfioui ◽  
Martin Matteau
Keyword(s):  
Temporal Variability ◽  
Atlantic Multidecadal Oscillation ◽  
Past Century ◽  
Left Bank ◽  
The South ◽  
North Shore ◽  
The North ◽  
South Shore ◽  
Atlantic Multidecadal Oscillation Index ◽  
Continental Climate

This paper, based on an analysis of the mean annual flow (MAF) of 16 natural rivers over the period 1934–2000, has the following goals: (1) to determine the different temporal variability modes of the MAF in the St. Lawrence watershed, (2) to describe the temporal variability of the streamflow in each mode and (3) to analyze the influence of the AMO (Atlantic Multidecadal Oscillation) on the interannual and interdecadal variability of mean annual flows in this Quebec watershed. This paper shows that the interannual variability of mean annual flow was not synchronous on both sides of the river. During the period analyzed, MAF variability was characterized by a tendency to decrease on the south shore (right bank) but to increase on the north shore (left bank). A correlation analysis reveals that the influence of the AMO was limited exclusively to the north shore of the river, which is characterized by a continental climate. This correlation is negative. On the south shore, streamflow is correlated negatively to the AO (Arctic Oscillation).

Lateral variations in upper crustal structure below the La Malbaie area from slowness, azimuth, and traveltime measurements of telleseisms

1977 ◽  
Vol 14 (10) ◽  
pp. 2284-2293 ◽  
Author(s):  
D. J. Hearty ◽  
R. F. Mereu ◽  
C. Wright
Keyword(s):  
Precambrian Basement ◽  
Precambrian Rock ◽  
The South ◽  
Local Seismicity ◽  
North Shore ◽  
The North ◽  
South Shore ◽  
Lateral Variations ◽  
Teleseismic Events ◽  
St Lawrence River

A temporary seismic network located in the La Malbaie region of eastern Quebec during the summer of 1974 for studying the local seismicity of the area was used as a seismic array to measure directly the slowness and azimuth of the P arrivals from 18 teleseismic events. A consistent bias in the arrival vectors was observed for rays approaching the array from the south (i.e. azimuths 181°–227°). This bias can be explained by a thickening of sedimentary strata beneath the south shore of the St. Lawrence River as opposed to the outcropping Precambrian basement rock on the north shore. The sedimentary accumulation can be interpreted in terms of a sloping interface located under the network between sediments and Precambrian rock or a thick horizontal sedimentary layer underlying the south shore of the St. Lawrence River.

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.

Four new Burmese species of Hemiphyllodactylus Bleeker (Squamata: Gekkonidae) from distantly related parapatric clades from the Shan Plateau and Salween Basin

Zootaxa ◽  
2020 ◽  
Vol 4758 (1) ◽  
pp. 45-82 ◽  
Author(s):  
L. LEE GRISMER ◽  
PERRY L. JR. WOOD ◽  
EVAN S. H. QUAH ◽  
MYINT KYAW THURA ◽  
JAMIE R. OAKS ◽  
...  
Keyword(s):  
New Species ◽  
Cloud Forest ◽  
Mitochondrial Gene ◽  
Color Pattern ◽  
The South ◽  
Taxonomic Analysis ◽  
The North ◽  
North And South ◽  
Northwestern Thailand

An integrative taxonomic analysis based on morphology, color pattern, and the mitochondrial gene ND2 recovered four new species of Hemiphyllodactylus Bleeker that are endemic to the Shan Plateau or Salween Basin in eastern Myanmar. Hemiphyllodactylus ngwelwini sp. nov. from the Shan Plateau is part of the earlier described “eastern Myanmar clade” renamed herein as the north lineage and H. kyaiktiyoensis sp. nov. and H. pinlaungensis sp. nov. of the Shan Plateau and H. zwegabinensis sp. nov. of the Salween Basin compose an entirely new Burmese clade herein referred to as the south lineage. Although the north and south lineages come within 46 km of one another on the Shan Plateau, they are not sister lineages but sequentially separated by two lineages from Yunnan, China and another from northwestern Thailand. Hemiphyllodactylus zwegabinensis sp. nov. is the first species of this genus to be recorded from the Salween Basin and is known only from a wind-blown cloud forest on the top of the insular, karstic mountain Zwegabin in Kayin State. All other Burmese species except for H. typus, are endemic to the various localities throughout the Shan Plateau. These four new species bring the total number of Hemiphyllodactylus in Myanmar to at least 10 which is certainly an extreme underestimate of the diversity of this genus given that we discover new species at every upland locality we survey. 

Decolonising cities of the global South in the classroom and beyond

2020 ◽  
Vol 91 (5) ◽  
pp. 535-552
Author(s):  
Astrid Wood
Keyword(s):  
Global South ◽  
Colonial Literature ◽  
The South ◽  
Post Colonial ◽  
The North ◽  
The World ◽  
North And South

In the post-colonial context, the global South has become the approved nomenclature for the non-European, non-Western parts of the world. The term promises a departure from post-colonial development geographies and from the material and discursive legacies of colonialism by ostensibly blurring the bifurcations between developed and developing, rich and poor, centre and periphery. In concept, the post-colonial literature mitigates the disparity between cities of the North and South by highlighting the achievements of elsewhere. But what happens when we try to teach this approach in the classroom? How do we locate the South without relying on concepts of otherness? And how do we communicate the importance of the South without re-creating the regional hierarchies that have dominated for far too long? This article outlines the academic arguments before turning to the opportunities and constraints associated with delivering an undergraduate module that teaches post-colonial concepts without relying on colonial constructs.

Debating the South in Unified Italy

2020 ◽  
pp. 186-214
Author(s):  
Stefan Nygård
Keyword(s):  
Nation State ◽  
The South ◽  
National Politics ◽  
The North ◽  
Political Debates ◽  
Catching Up ◽  
History Of ◽  
South Axis ◽  
Nation State Formation ◽  
North And South

The history of modern Italy is an illustrative example of the different social and spatial layers of the North–South divide. Since unification in 1861, Italy has struggled to overcome regional imbalances, mainly although not exclusively along a North–South axis. With an emphasis on the period following unification, when North-South was placed at the centre of national politics, this chapter surveys the lingering debates on Italy’s so-called Southern question and the dynamics of nation-state formation in which it is embedded. The contested history of this process includes debates over economic and moral debts caused by the uneven distribution of gains and sacrifices between North and South as a result of unification. Socio-economically, two North–South divides developed in parallel after unification; the more significant one between Italy and transalpine Europe, and the initially minor but eventually growing divergence between the northern and southern regions within Italy. The ideas of development, catching-up and “Europeanization” were recurring themes in the intellectual and political debates discussed in the chapter. The contested issue was whether the North was developing the South, or vice versa.

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