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- Raffaella Montelli
- Department of Geosciences, Princeton University, Princeton, NJ 08544, USA.
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- Guust Nolet
- Department of Geosciences, Princeton University, Princeton, NJ 08544, USA.
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- F. A. Dahlen
- Department of Geosciences, Princeton University, Princeton, NJ 08544, USA.
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- Guy Masters
- Department of Geosciences, Princeton University, Princeton, NJ 08544, USA.
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- E. Robert Engdahl
- Department of Geosciences, Princeton University, Princeton, NJ 08544, USA.
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- Shu-Huei Hung
- Department of Geosciences, Princeton University, Princeton, NJ 08544, USA.
抄録
<jats:p> We present tomographic evidence for the existence of deep-mantle thermal convection plumes. <jats:italic>P</jats:italic> -wave velocity images show at least six well-resolved plumes that extend into the lowermost mantle: Ascension, Azores, Canary, Easter, Samoa, and Tahiti. Other less well-resolved plumes, including Hawaii, may also reach the lowermost mantle. We also see several plumes that are mostly confined to the upper mantle, suggesting that convection may be partially separated into two depth regimes. All of the observed plumes have diameters of several hundred kilometers, indicating that plumes convey a substantial fraction of the internal heat escaping from Earth. </jats:p>
収録刊行物
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- Science
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Science 303 (5656), 338-343, 2004-01-16
American Association for the Advancement of Science (AAAS)
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キーワード
詳細情報
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- CRID
- 1362544420041631488
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- NII論文ID
- 80016426448
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- ISSN
- 10959203
- 00368075
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- データソース種別
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