Climate and Time in Their Geological Relations: A Theory of Secular Changes of the Earth's ClimateD. Appleton, 1875 - 577 páginas |
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Página 7
... latitudes was buried under ice , while at other periods Greenland and the Arctic regions , probably up to the North Pole , were not only free from ice , but were covered with a rich and luxuriant vegetation . To account for these ...
... latitudes was buried under ice , while at other periods Greenland and the Arctic regions , probably up to the North Pole , were not only free from ice , but were covered with a rich and luxuriant vegetation . To account for these ...
Página 11
... latitude of either hemisphere a perpetual spring , or the extreme vicissitudes of a burning summer and a rigorous winter . " This opinion , however , was unfortunately to a great extent nullified by the statement which shortly ...
... latitude of either hemisphere a perpetual spring , or the extreme vicissitudes of a burning summer and a rigorous winter . " This opinion , however , was unfortunately to a great extent nullified by the statement which shortly ...
Página 15
... latitude to depend solely on the heat received directly from the sun , only a very small portion of the globe would be habitable by the present order of beings . This being the case , it becomes obvious to what an extent the deflection ...
... latitude to depend solely on the heat received directly from the sun , only a very small portion of the globe would be habitable by the present order of beings . This being the case , it becomes obvious to what an extent the deflection ...
Página 29
... latitudes than for the torrid region , and we know , of course , that it is actually far less . This proves the truth of the assertion that by far the greater part of the moisture of the torrid regions falls in those regions as rain ...
... latitudes than for the torrid region , and we know , of course , that it is actually far less . This proves the truth of the assertion that by far the greater part of the moisture of the torrid regions falls in those regions as rain ...
Página 30
... thus carried away transferred by means of the upper currents to high latitudes and there employed to warm the earth , then it might to a con- siderable extent compensate for the absence of ocean - currents 30 CLIMATE AND TIME .
... thus carried away transferred by means of the upper currents to high latitudes and there employed to warm the earth , then it might to a con- siderable extent compensate for the absence of ocean - currents 30 CLIMATE AND TIME .
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Términos y frases comunes
amount of heat antarctic aphelion arctic regions Atlantic beds bottom boulder clay Caithness Carboniferous cause centre of gravity channel coal cold periods condition of climate consequently considerable denudation deposits depth descend earth's orbit eccentricity ecliptic effect Eocene equator evidence existence extent fact feet flow foot-pounds force Geikie Geol geological geologists glacial epoch glacier globe Grangemouth gravel greater Greenland Gulf-stream heat received ice-cap icebergs inter-glacial periods island James Geikie Kilsyth land land-ice latitude lower mass mean melting miles Miocene molecules motion North North Sea northern obliquity ocean ocean-currents perihelion polar column polar regions poles present probably produce Professor quantity of heat radiation regarding result river rocks sand says Scotland sea-bottom sea-level shear Sir Charles Lyell slope snow southern hemisphere specific gravity stones stratified stream striated submergence summer sun's supposed surface theory thickness tion valley warm periods winter
Pasajes populares
Página 331 - ... been removed from the general surface in one year ; and there seems no danger of our overrating the mean rate of waste by selecting the Mississippi as our example, for that river drains a country equal to more than half the continent of Europe, extends through twenty degrees of latitude, and therefore through regions enjoying a great variety of climate, and some of its tributaries descend from mountains of great height. The Mississippi is also more likely to afford us a fair test of ordinary...
Página 535 - Now, the perihelion of the orbit is situated nearly at the place of the northern winter solstice ; so that, were it not for the compensation we have just described, the effect would be to exaggerate the difference of summer and winter in the southern hemisphere, and to moderate it in the northern ; thus producing a more violent alternation of climate in the one hemisphere, and an approach to perpetual spring in the other. As it is, however, no such inequality subsists, but an equal and impartial...