978 resultados para North America--Maps, Manuscript.
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Cross section of a part of Eastern Europe and the Balkan Peninsula, from Kaliningrad in the north to Dubrovnik in the south.
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[drawn by Erwin] Raisz.
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Cross section of the area in Asia starting with Chittagong and Dhaka in the south to Stalinsk [Novokuznetsk, Sakha (Russian Federation)] in the north.
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[drawn by Erwin Raisz].
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[drawn by Erwin Raisz].
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[drawn by Erwin Raisz].
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The circulation and internal structure of the oceans exert a strong influence on Earth's climate because they control latitudinal heat transport and the segregation of carbon between the atmosphere and the abyss (Sigman et al., 2010, doi:10.1038/nature09149). Circulation change, particularly in the Atlantic Ocean, is widely suggested (Bartoli et al., 2005, doi:10.1016/j.epsl.2005.06.020; Haug and Tiedemann, 1998, doi:10.1038/31447; Woodard et al., 2014, doi:10.1126/science.1255586; McKay et al., 2012, doi:10.1073/pnas.1112248109) to have been instrumental in the intensification of Northern Hemisphere glaciation when large ice sheets first developed on North America and Eurasia during the late Pliocene, approximately 2.7 million years ago (Bailey et al., 2013, doi:10.1016/j.quascirev.2013.06.004). Yet the mechanistic link and cause/effect relationship between ocean circulation and glaciation are debated. Here we present new records of North Atlantic Ocean structure using the carbon and neodymium isotopic composition of marine sediments recording deep water for both the Last Glacial to Holocene (35-5 thousand years ago) and the late Pliocene to earliest Pleistocene (3.3-2.4 million years ago). Our data show no secular change. Instead we document major southern-sourced water incursions into the deep North Atlantic during prominent glacials from 2.7 million years ago. Our results suggest that Atlantic circulation acts as a positive feedback rather than as an underlying cause of late Pliocene Northern Hemisphere glaciation. We propose that, once surface Southern Ocean stratification (Sigman, et al., 2004, doi:10.1038/nature02357) and/or extensive sea-ice cover (McKay et al., 2012, doi:10.1073/pnas.1112248109) was established, cold-stage expansions of southern-sourced water such as those documented here enhanced carbon dioxide storage in the deep ocean, helping to increase the amplitude of glacial cycles.
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"Authorities consulted": p. 171-181.
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Originally issued in eight numbers, with paper covers bearing title: Onéota, or The red race of America ... The first four numbers were pub. in 1844, the last four in 1845. Reissued in one volume in 1845 under title: Onéota, or Characteristics of the red race of America ...; in 1847 under title: The red race of America ...; in 1848 under title: The Indian in his wigwam ...; in 1850 and 1851 under title: The American Indians ...; in 1853 under title: Western scenes and reminiscences ... cf. Sabin.
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"Reprinted from Journal of mycology, vol. 8, October 1902."
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Mode of access: Internet.
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Bibliography: II, p. 105-110; III, p. 221-230.
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Mode of access: Internet.
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"First published 1853. Reprinted 1943."