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      Landsat remote sensing of chlorophyll a concentrations in central North Island lakes of New Zealand

      Allan, Mathew Grant; Hamilton, David P.; Hicks, Brendan J.; Brabyn, Lars
      DOI
       10.1080/01431161003645840
      Link
       www.informaworld.com
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      Citation
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      Allan, M.G., Hamilton, D.P., Hicks, B.J. & Brabyn, L. (2011). Landsat remote sensing of chlorophyll a concentrations in central North Island lakes of New Zealand. International Journal of Remote Sensing, 32(7), 2037-2055.
      Permanent Research Commons link: https://hdl.handle.net/10289/5269
      Abstract
      We investigated the use of Landsat Enhanced Thematic Mapper (ETM) imagery to synoptically quantify chlorophyll a (chl a) concentrations. Two adjoining pairs of images of the central North Island were acquired on two different days in summer and spring 2002. 6sv atmospheric correction was compared to the cosine of the solar zenith angle correction (COST) dark object subtraction (DOS) atmospheric correction. The highest correlation between 6sv ln(Band 3) water surface reflectance and ln(chl a) was found in the 24 January 2002 image (r² = 0.954). 6sv atmospheric correction was preferable to COST-DOS as it gave more realistic reflectance values at a clear-water reference site and produced the highest correlation coefficient. The results from this investigation suggest that remote sensing provides a valuable tool to assess temporal and spatial distributions of chl a in unmonitored areas within lakes and that predictions may also be extended to unmonitored lakes within the domain of satellite image capture.
      Date
      2011
      Type
      Journal Article
      Publisher
      Taylor & Francis
      Collections
      • Science and Engineering Papers [3025]
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