增加模型分辨率可以提高,但高估了全球中深度循环模拟.
Haihong Guo1,2,3, Zhaohui Chen4,5, Ruichen Zhu1,2,3
1Frontier Science Center for Deep Ocean Multispheres and Earth System (FDOMES) and Physical Oceanography Laboratory, Ocean University of China, 238 Songling Road, Qingdao, 266100, China.
Scientific reports
|November 26, 2024
概括
高分辨率的气候模型可以改善海洋循环模拟,但仍然低估了当前的速度. 虽然它们能够更好地捕捉流动方向,但它们在全球范围内高估了中介尺度过程强度.
科学领域:
- 海洋学 海洋学 海洋学
- 气候建模气候模型
- 地质物理学 地质物理学
背景情况:
- 空间分辨率提高的气候模型增强了上层海洋循环模拟.
- 高分辨率模型对中深海洋循环的准确再现仍然不确定.
研究的目的:
- 评估不同分辨率的气候模型在模拟中深海洋循环中的性能.
- 评估模型分辨率对电流速度,流向和时间变化的影响.
主要方法:
- 分析了17个具有不同空间分辨率的气候模型.
- 模型输出与当前速度和方向的观测数据的比较.
- 在不同分辨率模型中对中等尺度过程的表示的评估.
主要成果:
- 低分辨率和高分辨率模型通常低估了与观测相比的当前速度.
- 高分辨率模型显示了当前速度和流动方向的改进模拟,南大洋的例外.
- 模型分辨率增强了时间变化和中尺度过程的表示性,但导致平均高估了65%的强度.
结论:
- 增加模型分辨率可以改善中深海洋循环模拟,特别是在强流地区.
- 尽管取得了改进,但在全球范围内准确模拟当前速度和南大洋等特定地区的流动方向方面仍然存在挑战.
- 高分辨率模型更好地捕捉动态过程,但需要进行调整,以避免高估中层活动强度.
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