• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 3959
  • 2238
  • 1154
  • 1013
  • 389
  • 387
  • 384
  • 369
  • 355
  • 344
  • 204
  • 189
  • 139
  • 130
  • 78
  • Tagged with
  • 12269
  • 2225
  • 2076
  • 2002
  • 1850
  • 1251
  • 1173
  • 1132
  • 982
  • 869
  • 774
  • 773
  • 725
  • 687
  • 608
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
41

Pressure-contour variance and kinetic energy over the arctic.

Macfarlane, Mona. A. January 1958 (has links)
A theoretical relationship between the variance of height (geopotential) and the variance of the geostrophic wind was tested in the Arctic at 500 mb. As had been expected, a high correlation was found to exist between these two quantities although the form of the relationship (linear in the logarithms of the standard deviations of height and wind) was totally unexpected. The Arctic data from previous papers, concerned with the relationship between the time variances of height and wind, were then reanalysed and the relationship between them was found to be of the same form as for the space variances. In both cases the standard error of estimate was too large to be able to calculate accurately the wind variance from the height variance, but the relationships do allow climatological estimates of the mean kinetic energy and the size of the dominant wave systems.
42

Insolation and Albedo in Quebec-Labrador.

Jackson, Charles Ian. January 1959 (has links)
A series of research workers in the Department of Geography at McGill University have for several years been engaged in a study of the physiography and plant geography of Quebec-Labrador. The principal results of this study up to the present are two series of reconnaisance maps of the physiographic surface-type and the cover-type, usually the plant-cover. [...]
43

an Analysis of Geographical Factors Determining the Northern Limits of the Pulp and Paper Industry in Northern Ontario.

Power, G.C. January 1959 (has links)
Pulp and paper manufacturing is one of Canada's best known industries, but the spectacular woods operation of British Columbia seem largely to overshadow the equally significant forest industries of eastern Canada, particularly in popular accounts of Canadian manufacturing. It was therefore with great interest and some trepidation that the writer approached the problem of preparing a thesis on a topic which was to him, a new arrival from England, beyond the range of his experience or knowledge.
44

Industrial geography of the Beauharnois canal zone.

Sinclair, Martin. H. January 1954 (has links)
The development of hydro-electric power is of paramount importance to the Province of Quebec. There are no coal deposits in the Province, oil has not, as yet, been found, and natural gas has appeared only in limited quantities; therefore, water power, the white coal, must be relied upon to supply the power required for industrial development. Electric power output is often considered an index of industrial growth. In 1900, prior to the inception of long-distance transmission of electricity, Canada's economic basis was agriculture, and the total hydraulic installation was about 173,000 horse power.
45

Some aspects of Pleistocene and post-glacial climate change in central Alaska.

Gerard, Robert. D. January 1955 (has links)
One need only see a glacial map of North America to become aware of a curious, if not anomalous fact. For of all the continental vastness four times-buried under the great ice sheets of the Pleistocene epoch, only one land area of any size remained ice free. That was the area of central Alaska and the western Yukon Territory. Here is to be sought the most complete climatic and stratigraphic record of Pleistocene events on the continent, north of the southern border of ice. Within this area, one is fortunate to find a road and transportation network which makes it accessible to the field worker as no other place in North America so far north.
46

Lower tropospheric inversions at Ice Island T-3.

Belmont, Arthur. D. January 1956 (has links)
The complete record of the first two years of radiosonde observations from the Polar Basin have been analyzed with respect to thermal inversions. An objective classification system was introduced to permit exact determinations of type, magnitudes of component layers, and frequencies of occurrence, of inversions. The method has general applicability to other portions of the radiosonde ascent. A new unit of inversion intensity was introduced and appears to be an improvement over the use of lapse rate.
47

A synoptic climatology for Labrador-Ungava.

Barry, Roger. G. January 1959 (has links)
A classification of airflow pattern types is formulated for the region on the basis of synoptic weather maps for November, 1956 to March, 1958. Regional indices of the zonal and meridional flow at mean sea level and the 500 mb level are examined in relation to the airflow types. The spatial and temporal variations of weather phenomena associated with the types are analyzed by quantitative weather parameters and the significance of the results is assessed with reference to local weather forecasting and palaeoclimatic reconstructions.
48

The topography and behavior of the polar tropopause over North America during 1958.

Cook, Charles. W. January 1960 (has links)
Investigation of the structure and the behavior of the arctic atmosphere to any great extent has only recently become possible. Meteorological research has been hampered by the lack of upper air data resulting from a thin network of arctic radiosonde stations. However, since 1945 there has been an increasing interest in the Arctic, and a subsequent expansion of the radiosonde station network. This fact, together with the International Geophysical Year program, has stimulated much more research.
49

The physiological and evolution of the Natashquan Terrace.

Welsted, John. E. January 1960 (has links)
The Natashquan river is one of several rivers flowing to the Gulf of St. Lawrence from Labrador-Ungava, which have deposited large quantities of sediment at their mouths since the end of the last glacial period. The Natashquan deposit is composed largely of coarse and medium grained sand. Downwarping of the North Shore, resulting from the weight of ice during the Pleistocene, was followed by emergence during and after the deglaciation. Although isostatic recovery is not yet complete, the depositional sand surface has been lifted above sea-level, and has been subjected to a variety of sub-aerial processes which have produced well-defined physiographic features.
50

The glacial geomorphology of the northern Nain-Okak section of Labrador.

Andrews, John. T. January 1961 (has links)
The role of Labrador-Ungava as one of the main gathering grounds of the Pleistocene ice caps, and one of the final centres of wastage was recognised as long ago as 1896 by the government geologist A. P. Low. In spite of its obvious importance in the glacial history of North America, Labrador-Ungava has received but scant attention from research workers in the field of glacial geomorphology or geology, due mainly to the inaccessibility and uncertain weather of the peninsula.

Page generated in 0.0335 seconds