Korean Journal of Remote Sensing (대한원격탐사학회지)

Korean Society of Remote Sensing (대한원격탐사학회)
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Spatial Analysis on Marine Atmosphere Boundary Layer Features of SAR Imagery Using Empirical Mode Decomposition

  • Jo, Young-Heon (Department of Oceanography, Pusan National Univesity) ;
  • Oliveira, Gustavo Henrique (Marine Studies Fluctus Consultoria em Oceanografia e Meio Ambiente) ;
  • Yan, Xiao-Hai (Center for Remote Sensing, College of Earth Ocean and Environment, University of Delaware, and University of Delaware/Xiamen University, Joint Institute of Coastal Research and Management)
  • Received : 2017.06.10
  • Accepted : 2017.08.07
  • Published : 2017.08.31
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Abstract

A new method to decompose the footprints of marine atmosphere boundary layer (MABL) on Synthetic Aperture Radar (SAR) imagery into characteristic spatial scales is proposed. Using two-dimensional Empirical Mode Decomposition (EMD) we obtain three Intrinsic Mode Functions (IMFs), which mainly present longitudinal rolls, three-dimensional cells and atmospheric gravity waves (AGW). The rolls and cells have spatial scales between 3.0 km and 3.8 km and between 5.3 km and 7.1 km, respectively. Based on previous observations and mixed-layer similarity theory, we estimated MABL's depths that vary from 0.95 km to 1.2 km over the rolls and from 3.0 km to 3.8 km over the cells. The AGW has maximum spectrum at 14.3 km wavelength. The method developed in this work can be used to decompose other satellite imageries into individual features through characteristic spatial scales.

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References

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