Determination of sea surface emissivity and thermal skin layer depth using infrared interferometry

Jennifer A. Hanafin, Peter J. Minnett

Research output: Contribution to conferencePaper

Abstract

Sea surface spectral emissivity and the depth of the thermal skin boundary layer were determined using high spectral resolution measurements of the sea surface and the atmosphere from field measurements from the Marine-Atmosphere Emitted Radiance Interferometer. In order to determine the sea surface emissivity, the effective incidence angle was found by minimizing the variance in the brightness temperature spectrum retrieved from the corrected upwelling radiance spectrum. Certain wavelength regions have different absorption characteristics, allowing the temperature at different levels to be retrieved from different spectral regions. In this way, the temperature gradient of the thermal boundary layer was determined. The depth of the skin layer was then calculated by determining the depth at which the thermometrically measured bulk temperature intersects this gradient. At low wind speeds, the skin layer can be up to 0.2mm deep, getting shallower with increased wind speed and becoming very shallow (0.01-0.07mm) above wind speeds of 8ms-1. These results are encouraging for application of this method to determine air-sea heat and gas fluxes in the field.

Original languageEnglish (US)
Pages348-350
Number of pages3
StatePublished - Dec 1 2001
Event2001 International Geoscience and Remote Sensing Symposium (IGARSS 2001) - Sydney, NSW, Australia
Duration: Jul 9 2001Jul 13 2001

Other

Other2001 International Geoscience and Remote Sensing Symposium (IGARSS 2001)
CountryAustralia
CitySydney, NSW
Period7/9/017/13/01

ASJC Scopus subject areas

  • Computer Science Applications
  • Earth and Planetary Sciences(all)

Fingerprint Dive into the research topics of 'Determination of sea surface emissivity and thermal skin layer depth using infrared interferometry'. Together they form a unique fingerprint.

  • Cite this

    Hanafin, J. A., & Minnett, P. J. (2001). Determination of sea surface emissivity and thermal skin layer depth using infrared interferometry. 348-350. Paper presented at 2001 International Geoscience and Remote Sensing Symposium (IGARSS 2001), Sydney, NSW, Australia.