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高分辨率海冰模型中的海冰特性

¹Polar Science Center Applied Physics Laboratory University of Washington Seattle WA USA.

Journal of geophysical research. Oceans

|January 29, 2024

概括

更高分辨率的北极海冰-海洋模型 (2-6公里) 显示了类似的大规模海冰特性. 模型参数可能不需要在各个尺度上经常调整,尽管更细的分辨率可以更好地捕捉海冰的导向.

科学领域:

* 气候建模 * 气候模型
* 北极海洋学研究
* 海洋冰的物理学

背景情况:

*精确模拟北极海冰动态对于了解气候变化影响至关重要.
*以前的研究表明,模型分辨率会影响海冰的表现,但最佳尺度仍在争论中.

研究的目的:

* 调查统一水平分辨率对北极海冰-海洋模型的影响.
* 评估增加模型分辨率是否可以提高对观察结果的性能.
* 为了确定海冰特性对特定尺度内的分辨率的敏感性.

主要方法:

*一个北极海冰-海洋模型被配置为三个统一的水平分辨率:6公里,4公里,2公里.
*使用了相同的海冰和海洋模型参数化,包括粘性塑料质学,机械冰强度和脊柱参数化.
*模型是由持续的大气强迫驱动的,结果与NASA IceBridge冰厚观测结果进行了比较.

主要成果:

*所有模型分辨率都产生了类似的空间模式和冰厚和运动的时间变化.
* 总冰量,平均冰度,冰速和厚度分数显示了几乎相同的季节性演变.
*将分辨率从6公里提高到2公里并没有显著改善与观察相比的模型性能,这表明大规模属性的不敏感性.

结论:

*本模型模拟的大规模北极海冰特性在很大程度上对2-10公里范围内的分辨率增加不敏感.
*为较粗的分辨率开发的模型参数可能适用于更高或多尺度的分辨率.
*虽然平均海冰状态相似,但更细的分辨率 (2公里) 更好地捕捉了海冰领先的空间和时间分布,尽管与观测结果不完全相同.

关键词:

在北极,北极的北极.高分辨率建模模型的使用.海冰是什么?海冰是什么?海冰的风湿学海洋冰的风湿学海冰强度参数是海冰强度参数.

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