在古世 - 世热量最大时期的大规模海洋脱氧
Weiqi Yao1, Adina Paytan2, Ulrich G Wortmann3
1Department of Earth Sciences, University of Toronto, Toronto, Ontario, M5S 3B1, Canada. weiqi.yao@mail.utoronto.ca.
概括
全球变暖可能导致海洋缺氧,使深海生态系统无法居住. 古世 - 世热极值 (PETM) 研究显示硫化物条件影响海洋物种和渔业.
科学领域:
- 古代海洋学
- 海洋生物学
- 气候科学
背景情况:
- 全球变暖对渔业的影响尚不清楚.
- 地质记录将碳循环的变化与海洋脱氧联系起来.
- 古世 - 世热极值 (PETM) 提供了相关的气候变化类比.
研究的目的:
- 在PETM期间调查海洋脱氧.
- 评估深海中硫化物普遍存在的可能性.
- 了解对海洋生态系统和渔业的影响.
主要方法:
- 来自PETM的硫同位素数据分析.
- 海洋模型模拟环境条件.
主要成果:
- 在PETM期间记录了每毫升1的硫同位素外流.
- 模拟表明大部分海洋变成了硫化物.
- 硫化的毒性威胁到中和水区域.
结论:
- 在PETM中经历了显著的海洋脱氧和硫化条件.
- 深海生态系统面临硫化毒性的严重威胁.
- 未来的变暖情景可能会导致海洋物种的广泛息地丧失.
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