Sclerosponge as archive of pCO2 in the past oceans
Project/Area Number |
17K17669
|
Research Category |
Grant-in-Aid for Young Scientists (B)
|
Allocation Type | Multi-year Fund |
Research Field |
Environmental dynamic analysis
Geochemistry/Cosmochemistry
|
Research Institution | The University of Tokyo |
Principal Investigator |
Kentaro Tanaka 東京大学, 大気海洋研究所, 特任研究員 (20792766)
|
Project Period (FY) |
2017-04-01 – 2020-03-31
|
Project Status |
Completed (Fiscal Year 2019)
|
Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
|
Keywords | 古環境 / 炭酸カルシウム / 海洋酸性化 / 硬骨海綿 / 二酸化炭素 / 石灰化生物 / 環境復元 / pH |
Outline of Final Research Achievements |
Sclerosponges produce calcareous skeletons. In this study, we examined whether the chemical composition of sclerosponge skeletons (boron concentration and isotope ratios) reflects seawater pH and carbonate ion concentration. As a result, pH estimated from the boron isotope ratio was nearly consistent with seawater pH, suggesting that sclerosponge can be utilized as a new archive of seawater pH. However, the carbonate ion concentration estimated by boron concentration and isotope ratios was higher than seawater value, indicating that it is difficult to estimate carbonate ion concentration based on sclerosponges.
|
Academic Significance and Societal Importance of the Research Achievements |
本研究では硬骨海綿のホウ素同位体比が海水pHの指標となりうることを示した.これまでもサンゴの骨格や有孔虫に記録された化学組成を利用して海水のpHを推定する研究が行われてきた.しかし,サンゴ骨格の化学組成から推定されるpHは海水のpHより高く,有孔虫を使った研究が行われた海域は限られている.今回の成果によってこれまでより広い海域と年代のpHをより正確に推定できる可能性を提示できた.本研究の成果をもとに全球規模での大気―海洋間の二酸化炭素の収支をより正確に明らかにする試みが促進されると期待できる.
|
Report
(4 results)
Research Products
(11 results)
-
[Journal Article] Evidence in the Japan Sea of microdolomite mineralization within gas hydrate microbiomes2020
Author(s)
Snyder, G.T., Matsumoto, R., Suzuki, Y., Kouduka, M., Kakizaki, Y., Zhang, N., Tomaru,H., Sano, Y.,, Takahata, N., Tanaka, K., Bowden, S.A., Imajo, T.
-
Journal Title
Scientific Reports
Volume: 10
Issue: 1
Pages: 1-13
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
-
-
-
-
[Journal Article] Structural-morphological and sedimentary features of forearc slope off Miyagi, NE Japan: implications for development of forearc basins and plumbing systems2020
Author(s)
Chang, Jih-Hsin, Park, Jin-Oh, Chen, Tzu-Ting, Yamaguchi, Asuka, Tsuru, Tetsuro, Sano, Yuji, Hsu, Ho-Han, Shirai, Kotaro, Kagoshima, Takanori, Tanaka, Kentaro, Tamura, Chiori
-
Journal Title
Geo-Marine Letters
Volume: -
Issue: 3
Pages: 309-324
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
-
-
-
-
-
-