Results 231 to 240 of about 47,397 (267)

Neogene aridification of the Northern Hemisphere

Geology, 2012
Neogene cooling and aridification in the Northern Hemisphere have long been recognized, but there are no studies comparing patterns of aridity gradients or differences between North America and Eurasia. Large herbivorous mammals are an excellent source for understanding large-scale environmental and climatic patterns because their molar crown height ...
Eronen, Jussi T., Fortelius, M., Portmann, F.T., Puolamäki, K., Janis, Christine, M.   +5 more
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THE INITIATION OF NORTHERN HEMISPHERE GLACIATION

Annual Review of Earth and Planetary Sciences, 1994
For well over a century, scientists have speculated that variations in the atmospheric concentration of radiatively important trace gases, such as carbon dioxide, could control the Earth’s climate (e.g. Arrhenius 1896). Recent observations of significant glacial-interglacial variation in atmospheric CO2 in ice cores put this idea on a firm ...
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Pleistocene Glaciations of the Northern Hemisphere

Geological Society of America Bulletin, 1929
Early Investigators As this has been announced to be a centenary year for glacial geology, a few words of explanation may be needed. The relevancy of 1928 as a centenary of glacial geology is based on the fact that two important investigations of glaciers date from the year 1828. That year marks the beginning of glacial studies by Jean de Charpentier,
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Some Animals of the Northern Hemisphere. ^* —(X.)

Journal of Education, 1897
Since the elk's antlers may fairly be considered typical, a fine pair are shown in the accompanying figure, to illustrate the different terms used in books on the chase. The browtine is the lowest branch, springing from the beam, or main stem of the antler, just above the burr, and curving gently downward toward the face.
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Transfer of Northern Hemisphere Fall-out to the Southern Hemisphere

Nature, 1966
THE detonation of a low-yield nuclear device in Western China at 1900 h, October 16, 1964 (New Zealand time), was reported, and tests for barium-140 were included in our routine investigations of fall-out at Gracefield, Wellington (41° 14′ S., 174° 55′ E.), to identify debris from this test.
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On the origin of northern and southern hemisphere grasslands

Plant Ecology, 2002
The origin of the grassy habit during the Eocene and the development of C4 grasses during the Miocene/Pliocene boundary are discussed before the origin of primary and secondary grassland in Eurasia and North America are discussed. A comparison shows that both Northern and Southern hemisphere primary grassland originated due to climatic changes to drier
G. J. Bredenkamp, SPADA, Francesco, E. Kazmierczak   +2 more
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The Breeding Seasons of Southern Hemisphere Birds in the Northern Hemisphere

Proceedings of the Zoological Society of London, 1938
Summary.Most Southern Hemisphere birds breed in the Southern Hemisphere spring and summer. Imported specimens of most of these species change their rhythm so as to breed in the northern spring and summer in the Northern Hemisphere.Some Southern Hemisphere birds breed in the Southern Hemisphere winter (or very early spring).
John R. Baker, R. M. Ranson
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Northern Hemisphere circulation

Nature, 2005
Air pressure at sea level during winter has decreased over the Arctic and increased in the Northern Hemisphere subtropics in recent decades, a change that has been associated with 50% of the Eurasian winter warming observed over the past 30 years, with 60% of the rainfall increase in Scotland and with 60% of the rainfall decrease in Spain1.
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Cyclones and Northern Hemispheric temperature

Theoretical and Applied Climatology, 1994
The relationships between cyclone characteristics and Northern Hemispheric (NH) temperature during the period 1958–1987 are examined by an empirical procedure. The results tend to indicate an increase in the frequency of cyclogenesis in the NW Pacific region but a decrease over the East Asia continent during the period of NH warming.
S. -J. Chen, Y. -H. Kuo
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Changes in permafrost extent and active layer thickness in the Northern Hemisphere from 1969 to 2018

Science of the Total Environment, 2022
Mingyi Zhang, Fan Yu, Ivan Khristoforov   +2 more
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