大型植物化石に基づく新生代の古気候変遷と気温  [in Japanese] Cenozoic climate and temperature on the basis of plant megafossils  [in Japanese]

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Abstract

Climatic factors controlling plant growth and distribution, and methods of paleoclimatic reconstructions based on plant megafossils are briefly reviewed. Of the two basic methods, the nearest living relative and leaf physiognomy methods, the latter provides more reliable interpretations for older fossil assemblages consisting of many species whose taxonomic affinities are uncertain. As evidenced by leaf physiognomic characters and other geologic informations, overall trends indicated by Japanese Cenozoic floras are changes in temperature under the humid climate. Estimated temperature curves are provided by leaf margin analysis of dicotyledons for these floras. Around the Early/Middle Miocene boundary is the warmest period during the Miocene. The plant megafossil evidence for this warm period indicates a warm-temperate climate : mean annual temperature is less than 20℃ and mean annual range of temperature is nearly the same as or greater than that of the present. The result is inconsistent with that by pollen and molluscan assemblages, and possible explanations for this discrepancy are given.

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Codes

  • NII Article ID (NAID)
    110002703574
  • NII NACSIS-CAT ID (NCID)
    AN00041606
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    00229202
  • NDL Article ID
    3835077
  • NDL Source Classification
    ZR1(科学技術--生物学) // ZM41(科学技術--地球科学)
  • NDL Call No.
    Z18-838
  • Data Source
    CJPref  NDL  NII-ELS 
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