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    A fiber optic spectrometry system for measuring irradiance distributions in sea ice environments

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    jtech-d-14-00108%2E1.pdf (1.556Mb)
    Date
    2014-12
    Author
    Wang, Hangzhou  Concept link
    Chen, Ying  Concept link
    Song, Hong  Concept link
    Laney, Samuel R.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/7107
    As published
    https://doi.org/10.1175/JTECH-D-14-00108.1
    DOI
    10.1175/JTECH-D-14-00108.1
    Keyword
     Sea ice; In situ oceanic observations 
    Abstract
    A fiber optic–based spectrometry system was developed to enable automated, long-term measurements of spectral irradiance in sea ice environments. This system utilizes a single spectrometer module that measures the irradiance transmitted by multiple optical fibers, each coupled to the input fiber of the module via a mechanical rotary multiplexer. Small custom-printed optical diffusers, fixed to the input end of each fiber, allow these probes to be frozen into ice auger holes as small as 5 cm in diameter. Temperature-dependent biases in the spectrometer module and associated electronics were examined down to −40°C using an environmental chamber to identify any artifacts that might arise when operating these electronic and optical components below their vendor-defined lower temperature limits. The optical performance of the entire system was assessed by freezing multiple fiber probes in a 1.2-m-tall ice column, illuminating from above with a light source, and measuring spectral irradiance distributions at different depths within the ice column. Results indicated that the radiometric sensitivity of this fiber-based system is comparable to that of commercially available oceanographic spectroradiometers.
    Description
    Author Posting. © American Meteorological Society, 2014. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of Atmospheric and Oceanic Technology 31 (2014): 2844–2857, doi:10.1175/JTECH-D-14-00108.1.
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    • Biology
    Suggested Citation
    Journal of Atmospheric and Oceanic Technology 31 (2014): 2844–2857
     
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