Comparison of interpolation methods of elevation-dependent atmospheric water vapor

Xiao Ying Yu, Wenbin Xu, Ya Fu Yang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

2 Citations (Scopus)

Abstract

Since the spatial resolutions between MERIS water vapor products and ASAR data are greatly different, the elevation-dependent ONN water vapor correction model is not sufficient in precision for spatial interpolation, especially in the area with large local elevation changes. In order to solve the problem, spaital interpolation methods, i.e. ordinary Kriging and von Karman Kriging, are proposed to combine with the ONN model for spatial interpolation. In order to correct the local over-smoothing in the Kriging model, Yamamoto's modified Kriging method was applied for spatial interpolation of regional atmospheric residuals. The results show that total atmospheric distribution in the studied area is the sum of the local atmospheric residual estimation and global ONN interpolation result. According to the cross-validation of the three different interpolation methods, von Karman Kriging for residual interpolation+ONN terrain model has better results than the other two methods in ERMSE, EMAE, EMREand ESTD. Additionally, von Karman Kriging for residual interpolation is more fit to the spatial distribution characteristics of the atmosphere, which is beneficial to correct the local over-smoothing in the von Karman Kriging for residual interpolation+ONN terrain model.
Original languageEnglish
Pages (from-to)3542-3547
Number of pages6
JournalZhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology)
Volume43
Issue number9
Publication statusPublished - 1 Sep 2012
Externally publishedYes

Keywords

  • MERIS water vapor products
  • ONN model
  • Ordinary Kriging
  • Von Karman Kriging model

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Geotechnical Engineering and Engineering Geology
  • Metals and Alloys
  • Materials Chemistry

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