Biological and Oceanographic Conditions in Hudson Bay: 11. Echinoderms of Hudson Bay

1937 ◽  
Vol 3 (4) ◽  
pp. 350-357 ◽  
Author(s):  
Austin H. Clark
Keyword(s):  
High Arctic ◽  
Hudson Bay ◽  
The West ◽  
Number Of Species ◽  
Arctic Area ◽  
Oceanographic Conditions

For an arctic area Hudson bay appears to have an unusually meagre representation of echinoderms, both species and individuals being few in numbers. The echinoderm fauna includes 29 species, all high arctic forms none of which are peculiar to or especially characteristic of the region. The largest number of species is known from the southeastern portion; but here the greatest amount of collecting has been done. The relative richness of the several sections of the bay would appear to be, the west (richest), southeast, central, northwest, northeast and southwest (poorest).

scholarly journals The Rossby radius in the Arctic Ocean

Ocean Science ◽  
2014 ◽  
Vol 10 (6) ◽  
pp. 967-975 ◽  
Author(s):  
A. J. G. Nurser ◽  
S. Bacon
Keyword(s):  
Arctic Ocean ◽  
General Circulation ◽  
Circulation Model ◽  
Ocean General Circulation Model ◽  
High Arctic ◽  
The Arctic ◽  
Hudson Bay ◽  
Ocean Eddies ◽  
Shelf Seas ◽  
The Impact

Abstract. The first (and second) baroclinic deformation (or Rossby) radii are presented north of ~60° N, focusing on deep basins and shelf seas in the high Arctic Ocean, the Nordic seas, Baffin Bay, Hudson Bay and the Canadian Arctic Archipelago, derived from climatological ocean data. In the high Arctic Ocean, the first Rossby radius increases from ~5 km in the Nansen Basin to ~15 km in the central Canadian Basin. In the shelf seas and elsewhere, values are low (1–7 km), reflecting weak density stratification, shallow water, or both. Seasonality strongly impacts the Rossby radius only in shallow seas, where winter homogenization of the water column can reduce it to below 1 km. Greater detail is seen in the output from an ice–ocean general circulation model, of higher resolution than the climatology. To assess the impact of secular variability, 10 years (2003–2012) of hydrographic stations along 150° W in the Beaufort Gyre are also analysed. The first-mode Rossby radius increases over this period by ~20%. Finally, we review the observed scales of Arctic Ocean eddies.

scholarly journals Induction Anomaly near the West Coast of Hudson Bay, Canada

10.4095/8926 ◽  
1983 ◽  
Author(s):  
J C Gupta ◽  
R D Kurtz ◽  
P A Camfield
Keyword(s):  
West Coast ◽  
Hudson Bay ◽  
The West

Paleomagnetism of the komatiitic basalts of the Ottawa Islands, N.W.T.

1985 ◽  
Vol 22 (4) ◽  
pp. 553-566 ◽  
Author(s):  
K. L. Buchan ◽  
W. R. A. Baragar
Keyword(s):  
North American ◽  
Hudson Bay ◽  
The West ◽  
Magnetization Direction ◽  
Polar Wander ◽  
The North ◽  
Dominant Component ◽  
Apparent Polar Wander Path

The komatiitic basalts of the Ottawa Islands in eastern Hudson Bay are on strike with and believed to form a continuation of similar units of the Cape Smith Belt 150 km to the northeast. Units sampled in the Ottawa Islands all dip gently to the west and hence are not suitable for an internal fold test of their age of magnetization. However, before correcting for the tilt of the lavas, the dominant magnetization direction (D = 207.6°, I = 61.9°, k = 168, α95 = 3.7°) does not differ significantly from the uncorrected magnetization direction reported from the steeply dipping, northwest-facing units at Cape Smith (D = 218°, I = 60°, k = 47, α95 = 4°). This negative fold test suggests that the remanence at both locations was acquired after folding. Comparison with the North American Precambrian apparent polar wander path implies that overprinting is related to the Hudsonian Orogeny.A second stable magnetization directed to the west with a shallow inclination is superimposed on the dominant component at a number of sampling sites. Its direction is poorly defined and no fold test is possible. However, magnetic evidence suggests that this component was probably acquired as an overprint after the dominant magnetization, perhaps during a mild reheating associated with the Elsonian Orogeny.

BIOLOGICAL AND OCEANOGRAPHIC CONDITIONS IN HUDSON BAY: 6. THE GENERAL HYDROGRAPHY AND HYDRODYNAMICS OF THE WATERS OF THE HUDSON BAY REGION

1932 ◽  
Vol 7 (1) ◽  
pp. 91-118 ◽  
Author(s):  
H. B. HACHEY
Keyword(s):  
Fresh Water ◽  
Water Movement ◽  
Open Ocean ◽  
Hudson Bay ◽  
Water Drainage ◽  
James Bay ◽  
Bay Area ◽  
Hydrographic Conditions ◽  
The Many ◽  
Oceanographic Conditions

The waters of Hudson bay differ markedly from the waters of Hudson strait and the waters of the open ocean. Intense stratification in the upper twenty-five metres, decreasing as the waters of the open ocean are approached, gives Hudson bay the character of a large estuary. Below fifty metres the waters are for all purposes dynamically dead, thus resulting in a cold saline body of water which probably undergoes very little change from season to season. The movements of the waters at various levels are dealt with to show that the inflow of waters from Fox channel and the many fresh-water drainage areas control the hydrographic conditions as found. The main water movement is from the James bay area to Hudson strait and thence to the open ocean.

BIOLOGICAL AND OCEANOGRAPHIC CONDITIONS IN HUDSON BAY: 5. THE PLANKTONIC DIATOMS IN HUDSON BAY

1931 ◽  
Vol 6 (1) ◽  
pp. 495-509 ◽  
Author(s):  
V. M. DAVIDSON
Keyword(s):  
Water Temperature ◽  
Hudson Bay ◽  
Planktonic Diatoms ◽  
Oceanographic Conditions

Surface catches of diatoms taken in Hudson bay in August and September 1930, revealed well-known species of arctic origin. They were most abundant and in best condition near the mouth of the bay, decreasing rapidly inwards, irrespective of the water temperature or the time of the catch.

Paleoeskimo Occupations of Central and High Arctic Canada

1976 ◽  
Vol 31 ◽  
pp. 15-39 ◽  
Author(s):  
Robert McGhee
Keyword(s):  
Temporal Distribution ◽  
High Arctic ◽  
Central Core ◽  
Hudson Bay ◽  
Arctic Canada ◽  
The Core ◽  
The Past ◽  
Archaeological Collections ◽  
Distribution Of Components ◽  
Cultural Discontinuities

Most of our knowledge regarding the Paleoeskimos of Arctic Canada is derived from the “core area” of Paleoeskimo occupation, a rough circle of some 1,000 km diameter including the coasts of Fury and Hecla Strait, Hudson Bay, and Hudson Strait. This is the area in which Dorset culture was first recognized, the source of most of our larger collections, and the area where continuity of development throughout the Paleoeskimo sequence has been demonstrated (Meldgaard 1962; Taylor 1968a; Maxwell 1973). The number and size of archaeological collections from this area suggest that it supported a larger Paleoeskimo population than did other regions of Arctic Canada, while the temporal distribution of components and continuities of style suggests that the region was occupied continuously throughout the Paleoeskimo period.In the fringe areas surrounding this central core, continuous occupation has not yet been demonstrated through any major segment of the Paleoeskimo sequence. Work in these fringe areas has rapidly progressed during the past decade, and it now seems certain that most of the temporal gaps and cultural discontinuities are not the result of poor archaeological sampling but reflect a situation of sporadic occupation occurring at different times in different regions. One of the striking features of the Paleoeskimo population was its propensity for expanding and retracting its geographical range, and this is the phenomenon which this paper will attempt to document. The primary aim of the paper is to sort out who lived where and when; a secondary aim is to suggest how they may have got there and what happened to them.

Introduction to ‘The 1997–8 El Niño Atlas of oceanographic conditions along the west coast of North America (23°N–50°N)’

2002 ◽  
Vol 54 (1-4) ◽  
pp. 503-511 ◽  
Author(s):  
C.G. Castro ◽  
T.R. Baumgartner ◽  
S. Bograd ◽  
R. Castro ◽  
F.P. Chavez ◽  
...  
Keyword(s):  
North America ◽  
West Coast ◽  
El Niño ◽  
El Nino ◽  
The West ◽  
Oceanographic Conditions

Simuliidae of the Buganda, Eastern and Western Provinces of Uganda

1937 ◽  
Vol 28 (2) ◽  
pp. 289-309 ◽  
Author(s):  
E. G. Gibbins
Keyword(s):  
Southern Hemisphere ◽  
East Coast ◽  
Northern Province ◽  
African Continent ◽  
River Nile ◽  
High Mountains ◽  
The West ◽  
Number Of Species ◽  
The Tropics

Five years ago, when a study was commenced of the Simuliid fauna of Uganda, 24 species were known from the whole of Africa. To-day, Uganda can claim more than that number within its own boundaries. In fact 30 species are known to occur in the country. And yet it is probable that many more species remain to be discovered, particularly as the investigation has not included the Northern Province, which will undoubtedly prove to be one of the richest in Simulium, since within its confines are the River Nile and its many subsidiary tributaries. Quite a number of species found in Uganda occur in other parts of the African continent. Some extend their distribution over to the west and also to the east coast, while other species do not confine their range to the tropics and are found as far afield as the Transvaal and Natal in the Southern Hemisphere. Early observations (1934) indicated a specialised Simuliid fauna on each of the high mountains in Uganda, and while this may still be true in the case of some species, subsequent investigations have shown that several have a wider distribution.

scholarly journals INDEX TO THE MANTIDÆ OF NORTH AMERICA, NORTH OF MEXICO

1896 ◽  
Vol 28 (8) ◽  
pp. 207-215 ◽  
Author(s):  
Samuel H. Scudder
Keyword(s):  
North America ◽  
Nominal Species ◽  
The West ◽  
East Indian ◽  
Number Of Species ◽  
North America North

In 1889, Westwood, in the Synopsis of the then known Mantidæ, prefixed to his Revisio insectorum familiæ Mantidorum, credits to North America, north of Mexico, nine species belonging to five genera,— Gonatista, Oligonyx, Thesprotia, Mantis, and Stagmomantis. several species were overlooked by him, and in reality up to the present time twenty-three nominal species have been at different times credited to this region and referred to ten genera,—Ameles, Empusa, Phasmomantis, Stagmatoptera, and Theoclytes, besides the foregoing. Several of the species, however, have been erroneously credited to this country, such as Empusa gongylodes and Mantis gemmata, both of which are East Indian. Several of the names, moreover, are synonyms of others, so that the number of species these references represent is speedily reduced more than one-half. All of these but Mantis Wheeleri Thom., Phasmomantis sumichrasti Sauss., and Oligonyx Uhleri Stal, I have seen, and to them can add several more not before recognized in the region in question, six of them being apparently hitherto undescribed, together with one genus. The total number of species is fifteen or sixteen, and of genera, eleven, only three of the genera—Litaneutria, Stagmomantis, and Oligonyx—having more than one species; undoubtedly more forms will be found in the West and South.

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