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Garaba, Shungudzemwoyo Pascal; Zielinski, Oliver (2013): Downwelling solar irradiance, upwelling solar radiance, sky leaving radiance, and cloud cover observed during ARCHEMHAB study (on Maria S. Merian Leg MSM21/3) from 2012-07-26 to 2012-08-10 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.819717, Supplement to: Garaba, SP; Zielinski, O (2013): Comparison of remote sensing reflectance from above-water and in-water measurements west of Greenland, Labrador Sea, Denmark Strait, and west of Iceland. Optics Express, 21(13), 15938, https://doi.org/10.1364/OE.21.015938

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Abstract:
The need to obtain ocean color essential climate variables (OC-ECVs) using hyperspectral technology has gained increased interest in recent years. Assessing ocean color on a large scale in high latitude environments using satellite remote sensing is constrained by polar environmental conditions. Nevertheless, on a small scale we can assess ocean color using above-water and in-water remote sensing. Unfortunately, above-water remote sensing can only determine apparent optical properties leaving the sea surface and is susceptible to near surface environmental conditions for example sky and sunglint. Consequently, we have to rely on accurate in-water remote sensing as it can provide both synoptic inherent and apparent optical properties of seawater. We use normalized water leaving radiance LWN or the equivalent remote sensing reflectance RRS from 27 stations to compare the differences in above-water and in-water OC-ECVs. Analysis of above-water and in-water RRS spectra provided very good match-ups (R2 > 0.97, MSE<1.8*10**-7) for all stations. The unbiased percent differences (UPD) between above-water and in-water approaches were determined at common OC-ECVs spectral bands (410, 440, 490, 510 and 555) nm and the classic band ratio (490/555) nm. The spectral average UPD ranged (5 – 110) % and band ratio UPD ranged (0 – 12) %, the latter showing that the 5% uncertainty threshold for ocean color radiometric products is attainable. UPD analysis of these stations West of Greenland, Labrador Sea, Denmark Strait and West of Iceland also suggests that the differences observed are likely a result of environmental and instrumental perturbations.
Related to:
Garaba, Shungudzemwoyo Pascal; Voß, Daniela; Wollschläger, Jochen; Zielinski, Oliver (2015): Modern approaches to shipborne ocean color remote sensing. Applied Optics, 54(12), 3602-3612, https://doi.org/10.1364/AO.54.003602
Garaba, Shungudzemwoyo Pascal; Zielinski, Oliver (2013): Methods in reducing surface reflected glint for shipborne above-water remote sensing. Journal of the European Optical Society-Rapid Publications, 8, 13058, https://doi.org/10.2971/jeos.2013.13058
Coverage:
Median Latitude: 66.679462 * Median Longitude: -44.111320 * South-bound Latitude: 59.668970 * West-bound Longitude: -55.987996 * North-bound Latitude: 71.167259 * East-bound Longitude: -21.862097
Date/Time Start: 2012-07-26T00:31:00 * Date/Time End: 2012-08-08T20:26:00
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
6 datasets

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Datasets listed in this publication series

  1. Zielinski, O; Voß, D; Meier, D et al. (2013): Cloud cover observations during Maria S. Merian cruise MSM21/3 (ARCHEMHAB). https://doi.org/10.1594/PANGAEA.810649
  2. Zielinski, O; Voß, D; Meier, D et al. (2013): Downward irradiance during Maria S. Merian cruise MSM21/3 (ARCHEMHAB). https://doi.org/10.1594/PANGAEA.810741
  3. Zielinski, O; Voß, D; Meier, D et al. (2013): Upward radiance radiance during Maria S. Merian cruise MSM21/3 (ARCHEMHAB). https://doi.org/10.1594/PANGAEA.810740
  4. Zielinski, O; Voß, D; Meier, D et al. (2013): Water leaving radiance during Maria S. Merian cruise MSM21/3 (ARCHEMHAB). https://doi.org/10.1594/PANGAEA.810857
  5. Zielinski, O; Voß, D; Meier, D et al. (2013): Normalized water leaving radiance during Maria S. Merian cruise MSM21/3 (ARCHEMHAB). https://doi.org/10.1594/PANGAEA.810858
  6. Zielinski, O; Voß, D; Meier, D et al. (2013): Remote sensing reflectance during Maria S. Merian cruise MSM21/3 (ARCHEMHAB). https://doi.org/10.1594/PANGAEA.810742