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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 40, Iss. 27 — Sep. 20, 2001
  • pp: 4807–4815

Scanning infrared radiometer for measuring the air–sea temperature difference

Joseph A. Shaw, Domenico Cimini, Ed R. Westwater, Yong Han, Heather M. Zorn, and James H. Churnside  »View Author Affiliations


Applied Optics, Vol. 40, Issue 27, pp. 4807-4815 (2001)
http://dx.doi.org/10.1364/AO.40.004807


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Abstract

We describe a vertically scanning infrared radiometer for measuring the air–sea temperature difference without disturbing the water skin layer. The radiometer operates with a single wavelength channel that is 1.1 µm wide, centered on 14.2 µm, on the short-wavelength edge of a CO2 atmospheric absorption band. The resulting high atmospheric absorption enables calibration of the horizontal-viewing signal with an in situ air-temperature sensor. The signal at all other scan angles is measured relative to that at the horizontal, providing a differential air–sea temperature measurement that is nearly independent of calibration offsets that can be a problem with independent air- and water-temperature sensors. We show data measured on a ship in the Tropical Western Pacific Ocean during July 1999, which exhibit important discrepancies from in situ data using bulk air- and water-temperature sensors. These discrepancies illustrate important differences between bulk versus skin water temperature.

© 2001 Optical Society of America

OCIS Codes
(010.0010) Atmospheric and oceanic optics : Atmospheric and oceanic optics
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.0280) Instrumentation, measurement, and metrology : Remote sensing and sensors
(120.5630) Instrumentation, measurement, and metrology : Radiometry

History
Original Manuscript: December 1, 2000
Revised Manuscript: May 21, 2001
Published: September 20, 2001

Citation
Joseph A. Shaw, Domenico Cimini, Ed R. Westwater, Yong Han, Heather M. Zorn, and James H. Churnside, "Scanning infrared radiometer for measuring the air–sea temperature difference," Appl. Opt. 40, 4807-4815 (2001)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-40-27-4807

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