利用基于对象的图像处理方法评估地幔流动诱发的动态地形的气象学方法

IF 2.4 3区 地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS
Ayodeji Taiwo , H.-P. Bunge , G. Craig
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引用次数: 0

摘要

构建和评估连接多个地幔状态的模型轨迹对于约束已知较少的地幔对流参数至关重要。以前,人们采用体积方法来评估构建的地幔流动轨迹的质量。然而,由于地幔对流无法直接观测,只能通过地表地质表达来推断,因此需要根据动态地形预测来评估这些轨迹。评估动态地形的典型指标存在双重惩罚问题--如果预测的强度、规模和时间正确,但位置不正确,则与观测结果相比会产生较大的均方根误差。在这里,我们引入了从气象学中汲取的指标,这些指标可将任意数量的动态地形场分解为不同的对象,然后比较对象之间的相似性。我们发现,这种基于对象的方法克服了双重惩罚,并能分别评估下沉和隆起区域之间的匹配质量,从而以稳健的方式评估模型。此外,这种方法还能对动态地形场的多个方面(包括动态地形的振幅和位置)进行独立的质量评估。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

A meteorology approach to assess mantle flow induced dynamic topography using object-based image processing methods

A meteorology approach to assess mantle flow induced dynamic topography using object-based image processing methods

The construction and assessment of model trajectories that link multiple mantle states is essential to constrain poorly known mantle convection parameters. Previously, volumetric approaches have been applied to assess the quality of constructed mantle flow trajectories. However, there is a need to assess these trajectories based on their dynamic topography predictions because mantle convection cannot be directly observed and may be inferred via its surface geological expressions. Typical metrics for assessing dynamic topography suffer from the double penalty problem — a prediction that is correct in intensity, size, and timing, but incorrect in location, results in large root-mean-square errors when compared to an observation. Here, we introduce metrics, gleaned from meteorology, that decompose any number of dynamic topography fields into their distinct objects after which the similarity between objects is compared. We find that this object-based approach overcomes double penalty and assesses models in a robust manner by providing the ability to assess separately the quality of match between subsidence and uplift areas. Additionally, the approach allows independent quality assessment of multiple aspects of a dynamic topography field, including amplitude and location of dynamic topography.

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来源期刊
Physics of the Earth and Planetary Interiors
Physics of the Earth and Planetary Interiors 地学天文-地球化学与地球物理
CiteScore
5.00
自引率
4.30%
发文量
78
审稿时长
18.5 weeks
期刊介绍: Launched in 1968 to fill the need for an international journal in the field of planetary physics, geodesy and geophysics, Physics of the Earth and Planetary Interiors has now grown to become important reading matter for all geophysicists. It is the only journal to be entirely devoted to the physical and chemical processes of planetary interiors. Original research papers, review articles, short communications and book reviews are all published on a regular basis; and from time to time special issues of the journal are devoted to the publication of the proceedings of symposia and congresses which the editors feel will be of particular interest to the reader.
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