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| Titel |
Evaluation of Arctic broadband surface radiation measurements |
| VerfasserIn |
N. Matsui, C. N. Long, J. Augustine, D. Halliwell, T. Uttal, D. Longenecker, O. Niebergall, J. Wendell, R. Albee |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 5, no. 2 ; Nr. 5, no. 2 (2012-02-24), S.429-438 |
| Datensatznummer |
250002468
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| Publikation (Nr.) |
 copernicus.org/amt-5-429-2012.pdf |
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| Zusammenfassung |
| The Arctic is a challenging environment for making in-situ surface radiation
measurements. A standard suite of radiation sensors is typically designed to
measure incoming and outgoing shortwave (SW) and thermal infrared, or
longwave (LW), radiation. Enhancements may include various sensors for
measuring irradiance in narrower bandwidths. Many solar radiation/thermal
infrared flux sensors utilize protective glass domes and some are mounted on
complex mechanical platforms (solar trackers) that keep sensors and shading
devices trained on the sun along its diurnal path. High quality measurements
require striking a balance between locating stations in a pristine
undisturbed setting free of artificial blockage (such as from buildings and
towers) and providing accessibility to allow operators to clean and maintain
the instruments. Three significant sources of erroneous data in the Arctic
include solar tracker malfunctions, rime/frost/snow deposition on the
protective glass domes of the radiometers and operational problems due to
limited operator access in extreme weather conditions. In this study,
comparisons are made between the global and component sum (direct [vertical
component] + diffuse) SW measurements. The difference between these two
quantities (that theoretically should be zero) is used to illustrate the
magnitude and seasonality of arctic radiation flux measurement problems. The
problem of rime/frost/snow deposition is investigated in more detail for one
case study utilizing both SW and LW measurements. Solutions to these
operational problems that utilize measurement redundancy, more sophisticated
heating and ventilation strategies and a more systematic program of
operational support and subsequent data quality protocols are proposed. |
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