Retrieval of the Ocean Skin Temperature Profiles from Measurements of Infrared Hyperspectral Radiometers-Part II: Field Data Analysis

Elizabeth W. Wong, Peter J. Minnett

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

To obtain the vertical temperature profile of the thermal skin layer on the aqueous side of the ocean-atmosphere interface from radiance measurements of hyperspectral infrared radiometers, regularization methods are used to address the nonlinearity and ill-conditioning of the inverse problem associated with the retrieval. This paper demonstrates the truncated singular value decomposition regularization technique on field data sets obtained from the Marine-Atmospheric Emitted Radiance Interferometer (M-AERI). The M-AERI takes highly accurate and spectrally resolved radiance measurements in the infrared, which allows for the sensing of temperature values within thermal skin layer depths of less than 1 mm below the ocean surface. Results showed temperature inversions found in the solution, but these are deemed unphysical, based on previous tests on synthetic data and by a scaling analysis using the Rayleigh number, which are presented here. The importance of sea surface emissivity for performing the atmospheric correction to M-AERI measurements to derive surface emissivity spectra is also discussed. The retrieved profiles exhibit a smooth exponential-like structure that agrees well with theory.

Original languageEnglish (US)
Article number7372407
Pages (from-to)1891-1904
Number of pages14
JournalIEEE Transactions on Geoscience and Remote Sensing
Volume54
Issue number4
DOIs
StatePublished - Apr 2016

Keywords

  • Infrared (IR)
  • radiometer
  • skin sea surface temperature (SST)
  • truncated singular value decomposition (TSVD)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Earth and Planetary Sciences(all)

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