配对的珊瑚 Sr/Ca 和 δ18O 记录显示,ENSO 对马来西亚婆罗洲水气候的影响越来越大
Walid Naciri1, Arnoud Boom1, Takaaki K Watanabe2
1University of Leicester, 1 University Road, LE1 7RH Leicester, United Kingdom.
The Science of the total environment
|October 19, 2024
概括
厄尔尼诺南方振荡 (ENSO) 越来越多地影响马来西亚婆罗洲.
科学领域:
- 古气候学 古气候学
- 气候科学 气候科学
- 海洋学 海洋学 海洋学
背景情况:
- 厄尔尼诺南方振荡 (ENSO) 是一种全球气候现象,影响全球气温和降水.
- 恩索对马来西亚婆罗洲水气候的影响很大,特别是气候变化加剧了极端恩索事件.
- 了解ENSO不断变化的影响对于预测海上大陆未来的水气候变化至关重要.
研究的目的:
- 用珊瑚地化学代理来重建马来西亚婆罗洲过去的水气候.
- 评估ENSO在20世纪对该地区水气候的影响.
- 提供有关ENSO与其他气候驱动因素 (如IOD和PDV) 的远程连接的见解.
主要方法:
- 利用来自巨大的珊瑚骨架的合 δ18O 和 Sr/Ca 记录.
- 开发了 δ18O海水 (δ18Osw) 作为过去水气候的代理,以弥补有限的仪器数据.
- 与仪器盐度数据和使用移动窗口分析的NINO3.4指数 (ENSO指标) 相关联的 δ18Osw记录.
主要成果:
- 地化学代理仪器数据协议根据数据集,位置,时期和季风季节而有所不同,最近数据的协议更好.
- δ18Osw记录显示,随着时间的推移,与NINO3.4指数的相关性越来越强.
- 从20世纪80年代开始,ENSO对当地水气候的影响显著增加 (湿季风期间r > 0.8).
结论:
- 地质化学档案对于理解ENSO影响的理解至关重要,其历史早于可靠的仪器记录.
- 自20世纪80年代以来,ENSO对西北婆罗洲水气候的影响越来越大.
- 该研究强调了ENSO,印度洋双极 (IOD) 和太平洋十年变化 (PDV) 在区域水气候上的复杂相互作用.
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