Synthesizing high-resolution satellite salinity data based on multi-fractal fusion

IF 1.4 3区 地球科学 Q3 OCEANOGRAPHY
Hengqian Yan, Jian Shi, Ren Zhang, Wangjiang Hu, Yongchui Zhang, Mei Hong
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引用次数: 0

Abstract

The spaceborne platform has unprecedently provided the global eddy-permitting (typically about 0.25°) products of sea surface salinity (SSS), however the existing SSS products can hardly resolve mesoscale motions due to the heavy noises therein and the over-smoothing in denoising processes. By means of the multi-fractal fusion (MFF), the high-resolution SSS product is synthesized with the template of sea surface temperature (SST). Two low-resolution SSS products and four SST products are considered as the source data and the templates respectively to determine the best combination. The fused products are validated by the in situ observations and intercompared via SSS maps, Singularity Exponent maps and wavenumber spectra. The results demonstrate that the MFF can perform a good work in mitigating the noises and improving the resolution. The combination of the climate change initiative SSS and the remote sensing system SST can produce the 0.1° denoised product whose global mean standard derivation of salinity against Argo is 0.21 and the feature resolution can reach 30–40 km.

基于多分形融合的高分辨率卫星盐度数据合成
空间平台已经前所未有地提供了全球允许涡度(通常约为 0.25°)的海面盐度(SSS)产品,然而,由于其中存在大量噪声以及去噪过程中的过度平滑,现有的 SSS 产品很难分辨中尺度运动。通过多分形融合(MFF)技术,以海面温度(SST)为模板合成了高分辨率 SSS 产品。两个低分辨率 SSS 产品和四个 SST 产品分别作为源数据和模板,以确定最佳组合。融合后的产品经现场观测验证,并通过 SSS 图、奇异指数图和波数谱进行相互比较。结果表明,MFF 可以很好地降低噪声和提高分辨率。气候变化倡议 SSS 与遥感系统 SST 的结合可产生 0.1° 去噪产品,其盐度对 Argo 的全球平均标准推导为 0.21,特征分辨率可达 30-40 千米。
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来源期刊
Acta Oceanologica Sinica
Acta Oceanologica Sinica 地学-海洋学
CiteScore
2.50
自引率
7.10%
发文量
3884
审稿时长
9 months
期刊介绍: Founded in 1982, Acta Oceanologica Sinica is the official bi-monthly journal of the Chinese Society of Oceanography. It seeks to provide a forum for research papers in the field of oceanography from all over the world. In working to advance scholarly communication it has made the fast publication of high-quality research papers within this field its primary goal. The journal encourages submissions from all branches of oceanography, including marine physics, marine chemistry, marine geology, marine biology, marine hydrology, marine meteorology, ocean engineering, marine remote sensing and marine environment sciences. It publishes original research papers, review articles as well as research notes covering the whole spectrum of oceanography. Special issues emanating from related conferences and meetings are also considered. All papers are subject to peer review and are published online at SpringerLink.
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