在过去30年中,对长江河口和红河河口海平面上升的比较研究
Wenjing Xue1, Lulu Qiao2,3, Sichen Zhang1
1College of Marine Geosciences, Ocean University of China, Qingdao, 266000, Shandong, China.
Scientific reports
|October 15, 2025
概括
亚洲河口的海平面上升正在加速,红河河口 (RRE) 的上升速度略高于长江河口 (YRE). 这两个地区都经历了由温度和风力影响的海平面显著异常,未来的预测表明将继续上升.
科学领域:
- 海洋学 海洋学 海洋学
- 气候科学 气候科学
- 沿海研究 沿海研究
背景情况:
- 海平面上升对全球沿海地区构成重大威胁.
- 长江河口 (YRE) 和红河河口 (RRE) 等河口对气候变化影响非常敏感.
- 对不同气候和动态条件的河口海平面变化的比较研究有限.
研究的目的:
- 分析 YRE 和 RRE 中海平面异常 (SLA) 的时间变化.
- 确定影响这些独特的河口环境中SLA的控制因素.
- 为了比较一个温带 (YRE) 和一个亚热带 (RRE) 河口之间的海平面变化动态.
主要方法:
- 利用了长期的卫星高度测量数据.
- 综合海面温度 (SST) 和风场数据用于分析.
- 应用频谱分析以识别SLA变化的时间信号.
主要成果:
- YRE和RRE都显示出SLA显著增加的趋势,分别为3.4mm/yr和3.6mm/yr.
- 观察到不同的光谱信号:YRE显示年度,~4个月和~2个月周期,而RRE显示年度和半年周期.
- YRE中的SLA受SST和本地风的影响,而RRE主要受到SST的影响,与水深相关的延迟时间有所不同.
结论:
- 河口SLA在YRE和RRE中都在增加,而RRE的速度略高一些.
- 在这两个河口,SST是SLA的主要驱动因素,风在YRE中发挥着作用.
- 未来的预测表明SLA持续增加,需要进一步研究河口对气候变化的反应.
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