The spectral upwelling radiance distribution in optically shallow waters

Kenneth Voss, Curtis D. Mobley, Lydia K. Sundman, James E. Ivey, Charles H. Mazel

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

The upwelling radiance distribution in optically shallow water is investigated with experiments and Hydrolight numerical simulations for two different benthic surfaces and a range of solar zenith angles (u/Lu, where Eu is the upwelling irradiance and Lu is the upwelling radiance) for this case was significantly less than π. Q, at 440 nm and 670 nm, was almost independent of solar zenith angle. The Hydrolight model results agreed well with the experimental measurements in this case. Over a seagrass surface (water depth 8 m) at 440 nm the radiance distribution was more uniform, while at 670 nm the benthic surface has a negligible effect on the upwelling radiance distribution. In this case, Q was dependent on solar zenith angle, with Q(670 nm) close to the values expected in optically deep water. At 440 nm, the agreement between the radiance distribution obtained from Hydrolight and the data is better at larger solar zenith angles, but at small solar zenith angles the experiments indicated that there were significant non-Lambertian effects over the seagrass surface, with a much higher reflectance at small nadir view angles.

Original languageEnglish (US)
Pages (from-to)364-373
Number of pages10
JournalLimnology and Oceanography
Volume48
Issue number1 II
StatePublished - Jan 2003

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zenith angle
radiance
upwelling
shallow water
seagrass
reflectance
surface water
water
nadir
irradiance
water depth
deep water
experiment
distribution
simulation
effect

ASJC Scopus subject areas

  • Aquatic Science
  • Oceanography

Cite this

Voss, K., Mobley, C. D., Sundman, L. K., Ivey, J. E., & Mazel, C. H. (2003). The spectral upwelling radiance distribution in optically shallow waters. Limnology and Oceanography, 48(1 II), 364-373.

The spectral upwelling radiance distribution in optically shallow waters. / Voss, Kenneth; Mobley, Curtis D.; Sundman, Lydia K.; Ivey, James E.; Mazel, Charles H.

In: Limnology and Oceanography, Vol. 48, No. 1 II, 01.2003, p. 364-373.

Research output: Contribution to journalArticle

Voss, K, Mobley, CD, Sundman, LK, Ivey, JE & Mazel, CH 2003, 'The spectral upwelling radiance distribution in optically shallow waters', Limnology and Oceanography, vol. 48, no. 1 II, pp. 364-373.
Voss K, Mobley CD, Sundman LK, Ivey JE, Mazel CH. The spectral upwelling radiance distribution in optically shallow waters. Limnology and Oceanography. 2003 Jan;48(1 II):364-373.
Voss, Kenneth ; Mobley, Curtis D. ; Sundman, Lydia K. ; Ivey, James E. ; Mazel, Charles H. / The spectral upwelling radiance distribution in optically shallow waters. In: Limnology and Oceanography. 2003 ; Vol. 48, No. 1 II. pp. 364-373.
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