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| Titel |
Mapping radiation transfer through sea ice using a remotely operated vehicle (ROV) |
| VerfasserIn |
M. Nicolaus, C. Katlein |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1994-0416
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| Digitales Dokument |
URL |
| Erschienen |
In: The Cryosphere ; 7, no. 3 ; Nr. 7, no. 3 (2013-05-02), S.763-777 |
| Datensatznummer |
250017964
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| Publikation (Nr.) |
 copernicus.org/tc-7-763-2013.pdf |
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| Zusammenfassung |
| Transmission of sunlight into and through sea ice is of critical importance
for sea-ice associated organisms and photosynthesis because light is their
primary energy source. The amount of visible light transferred through sea
ice contributes to the energy budget of the sea ice and the uppermost ocean.
However, our current knowledge on the amount and distribution of light under
sea ice is still restricted to a few local observations, and our understanding
of light-driven processes and interdisciplinary interactions is still
sparse. The main reasons are that the under-ice environment is difficult to access
and that measurements require large logistical and instrumental efforts.
Hence, it has not been possible to map light conditions under sea ice over larger
areas and to quantify spatial variability on different scales. Here we
present a detailed methodological description for operating spectral
radiometers on a remotely operated vehicle (ROV) under sea ice. Recent
advances in ROV and radiation-sensor technology have allowed us to map under-ice
spectral radiance and irradiance on floe scales within a few hours of station
time. The ROV was operated directly from the sea ice, allowing for direct
relations of optical properties to other sea-ice and surface features. The
ROV was flown close to the sea ice in order to capture small-scale
variability. Results from the presented data set and similar future studies
will allow for better quantification of light conditions under sea ice. The
presented experiences will support further developments in order to gather
large data sets of under-ice radiation for different ice conditions and
during different seasons. |
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