https://scholars.lib.ntu.edu.tw/handle/123456789/492990
標題: | Climatic Constraints on Growth Rate and Geochemistry (Sr/Ca and U/Ca) of the Coral Siderastrea stellata in the Southwest Equatorial Atlantic (Rocas Atoll, Brazil) | 作者: | Evangelista, H. Sifeddine, A. Corr?ge, T. Servain, J. Dassi?, E.P. Logato, R. Cordeiro, R.C. CHUAN-CHOU SHEN Le Cornec, F. Nogueira, J. Segal, B. Castagna, A. Turcq, B. |
關鍵字: | coral; Equatorial Atlantic; ITCZ; Rocas Atoll; Siderastrea stellata; wind stress | 公開日期: | 2018 | 卷: | 19 | 期: | 3 | 起(迄)頁: | 772-786 | 來源出版物: | Geochemistry, Geophysics, Geosystems | 摘要: | Although relatively rare compared to similar latitudes in the Pacific or Indian Oceans, massive coral colonies are present in the Tropical/Equatorial Southwestern Atlantic Ocean. However, detailed geochemical compositions of these corals are still largely unknown. In this work, we present growth rates, Sr/Ca, and U/Ca ratios of the coral colony (Siderastrea stellata) sampled at Rocas Atoll, off the Brazilian coast. These variables are primarily affected by sea surface temperature (SST) at seasonal scale, and by wind stress at interannual scale, these results represent a broad new finding. A lower significance at the interannual time scale between Sr/Ca and U/Ca with respect to SST is attributed to the low SST amplitude closed to Equator. An investigation on the dependence of coral growth rates with respect to the “cloud shading effect” promoted by the Intertropical Convergence Zone (ITCZ) does not show significant influence. Additionally, rain seems to act on local geochemistry of Sr/Ca ratios and growth rate at the decadal scale. © 2018. American Geophysical Union. All Rights Reserved. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/492990 | DOI: | 10.1002/2017GC007365 | SDG/關鍵字: | Geochemistry; Growth rate; Surface waters; Wind stress; Coral; Equatorial Atlantic; ITCZ; Rocas Atoll; Siderastrea stellata; Oceanography; climate effect; coral; geochemistry; growth rate; intertropical convergence zone; isotopic ratio; wind stress; Atlantic Ocean; Atlantic Ocean (Equatorial); Brazil; Brazil; Rio Grande do Norte; Rocas Atoll; Anthozoa; Siderastrea stellata |
顯示於: | 地質科學系 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。