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Improved Arctic Ocean Bathymetry Derived From DTU17 Gravity Model

机译:改进来自DTU17重力模型的北冰海洋浴室

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The existing bathymetry map of the Arctic is a compilation of ship soundings and digitized contours. Due to the presence of all‐year sea ice, costly operations and political restrictions, dense and full coverage of the Arctic is not possible, leaving huge gaps between the existing surveys. In this paper, we make use of the existing Arctic bathymetry IBCAOv3 and invert Arctic bathymetry from the recent altimetric gravity model DTU17, whose accuracy is improved significantly with revised data processing strategy. The long and short wavelength components are preserved from IBCAOv3. The band‐pass‐filtering function proposed by Smith and Sandwell (1994, https://doi.org/10.1029/94JB00988 ) is adapted for the Arctic by reducing the cutoff wavelength. The predicted bathymetry is within 100 m on 85.8% of the grid nodes, when compared to the IBCAOv3. The consistency of the prediction is validated with two independent profiles from Healy cruises conducted in 2016 over the Chukchi Cap. A questionable valley in the IBCAOv3 is detected with gravity and at this spot, bathymetry predicted from gravity is consistent with independent multibeam soundings. The gravity‐inverted bathymetry could be combined with ship soundings for the next generation of Arctic bathymetry map.
机译:北极的现有浴室图是船舶探测和数字化轮廓的汇编。由于存在全年的海冰,昂贵的运营和政治限制,北极的密集和全面覆盖是不可能的,在现有的调查之间留下了巨大的差距。在本文中,我们利用现有的北极沐浴浴Ibcaov3并从最近的完全重力模型DTU17反转北极沐浴浴,其精度随着修订的数据处理策略而显着提高。长短的短波长组件从IBCAOV3保留。史密斯和Sandwell(1994,HTTPS://Doi.org/10.1029/94JB00988)提出的带通滤波功能通过减小截止波长来调整北极。与IBCAOV3相比,预测的沐浴络在栅格节点的85.8%以内100米。预测的一致性与来自2016年2016年在Chukchi帽进行的Heally Cruises的两个独立曲线验证。 IBCAOV3中的一个可疑的谷在重力和此处检测到,从重力预测的沐浴族与独立的多滨探测相一致。重力倒置的沐浴醇可以与下一代北极沐浴般地图相结合。

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