Using foraminiferal Mg/Ca ratios to detect an ocean-warming trend in the twentieth century from coastal shelf sediments in the Bungo Channel, southwest Japan
Bibliographic Data
| ID | 12267383 |
|---|---|
| Authors | Michinobu Kuwae (0000-0002-7747-5421, Ehime University, corresponding author), Yuichi Hayami (Ariake Sea Research Project, Saga University, Saga 840-8502, Japan), Hirotaka Oda (Nagoya University), Azumi Yamashita (The Ehime Prefectural Fisheries Experimental Station, Ehime 798-0104, Japan), Atsuko Amano (0000-0001-5209-9880, Ehime University), Atsushi Kaneda (0000-0003-0942-470X, Ehime University), Minoru Ikehara (0000-0002-2695-4713, Kōchi University), Yoshio Inouchi (Waseda University), Koji Omori (Ehime University), Hidetaka Takeoka (Ehime University), Hodaka Kawahata (0000-0003-4236-7356, Ocean Research Institute, University of Tokyo, Tokyo 164-8639, Japan) |
| Year | 2009 |
| Volume | 19 |
| Issue | 2 |
| Pages | 285-294 |
| Publication date | 2009-02-23 |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | The Holocene (JOURNAL) |
| Journal identifiers | ISSN: 0959-6836 • E-ISSN: 1477-0911 |
| Publisher | SAGE Publishing (PUBLISHER • US) |
| DOI | 10.1177/0959683608100573 |
| OpenAlex | W2073978348 |
| Language | EN |
| Citations received | 1 |
| References cited | 35 |
To assess abnormal warming of temperature in southwest Japan's coastal seas during the twentieth century, we developed a 200 yr interannually resolved record of planktonic and benthic foraminiferal Mg/Ca-based temperature using neritic coastal sediment cores. The winter to late spring bottom temperature (50 m) record, based on benthic foraminiferal ( Nonion japonicum) Mg/Ca ratios in the Bungo Channel (BC), showed consistent variation with observed temperatures on a five-year average basis. The BC bottom temperature record showed a significant increasing trend of 1.5°C /100 yr during the twentieth century, which was never apparent in nineteenth century. That result suggests that our Mg/Ca-based thermometry approach using coastal benthic foraminifera can detect abnormally rising temperatures in neritic coastal seas in southwest Japan. The abnormal warming of winter to late spring bottom temperature in the BC contrasts with the lack of an increasing trend in the Globigerinoides ruber-based summer to autumn temperature for the upper 20 m in the slope region of southwest Japan and the lack of an increasing trend in the steric sea level in the region. These results indicate a warming trend of the neritic coastal ocean in southwest Japan, especially in winter to late spring. The timing of the onset of the prolonged abnormal high-temperature stage, which started in the early twentieth century, suggests a link of the neritic coastal ocean in Japan with human-induced global warming
Benthic zone · Climate change · Climatology · Effects of global warming on oceans · Foraminifera · Global warming · Plankton · Sea surface temperature · Sediment · Environmental Science · Geology and Paleoclimatology Research · Isotope Analysis in Ecology · Marine and environmental studies · Geology · Oceanography · Paleontology
| Citations per year | 0.09 |
|---|---|
| Citation span | 2015 - 2015 (1) |
| Highly cited | No |