後氷期のサンゴ礁への炭酸カルシウム堆積速度

• 芽根 創

  地質調査所海洋地質部

書誌事項

タイトル別名

• Deposition of calcium carbonate into postglacial reefs: a test on a "coral reef hypothesis"
• コウヒョウキ ノ サンゴショウ エ ノ タンサン カルシウム タイセキ ソクド

抄録

Calcium carbonate deposition in the ocean results in a release of CO₂ to the atmosphere. Based on this process, a "coral reef hypothesis" was proposed to explain postglacial CO₂ increase as a result of reef growth. The model assumed that if twice the mass of atmospheric carbon (2 ACM) were deposited into coral reefs between 15,000 and 10,000 years B. P., the accompanying release of CO₂ would account for 40 ppm increase of the atmospheric CO₂. In this paper, calcium carbonate deposition rates into postglacial reefs with a time scale of 1000 years is calculated based on shallow core researches to test the hypothesis. The total reef mass is estimated to be 2 ACM. Calcium carbonate deposition rates of postglacial reefs attained their maximum between 5000 and 6000 years B. P. with a rate of 0.45 ACM for 1000 years. This major deposition phase does not match the period of observed CO₂ increase in the atmosphere. This discrepancy is not in agreement with the "coral reef hypothesis" .

収録刊行物

• 地球化学

  地球化学 27 (1), 37-42, 1993

  一般社団法人日本地球化学会

詳細情報

• CRID: 1390282680718277376
• NII論文ID: 110008679873
• NII論文ID: 10006454979
• NII書誌ID: AN00141280
• DOI: 10.14934/chikyukagaku.27.37
• ISSN: 21885923
• ISSN: 03864073
• NDL書誌ID: 3834586
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I3834586
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可