Astronomical seeing and ground-layer turbulence in the Canadian high Arctic

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DOIResolve DOI: http://doi.org/10.1093/mnras/stt729
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TypeArticle
Journal titleMonthly Notices of the Royal Astronomical Society
ISSN0035-8711
Volume433
Issue1
Pages307312; # of pages: 6
AbstractWe report results of a two-year campaign of measurements, during arctic winter darkness, of optical turbulence in the atmospheric boundary layer above the Polar Environment Atmospheric Laboratory in northern Ellesmere Island (latitude +80° N). The data reveal that the ground-layer turbulence in the Arctic is often quite weak, even at the comparatively low 610 m altitude of this site. The median and 25th percentile ground-layer seeing, at a height of 20 m, are found to be 0.57 and 0.25 arcsec, respectively. When combined with a free-atmosphere component of 0.30 arcsec, the median and 25th percentile total seeing for this height is 0.68 and 0.42 arcsec, respectively. The median total seeing from a height of 7 m is estimated to be 0.81 arcsec. These values are comparable to those found at the best high-altitude astronomical sites. © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC)
Peer reviewedYes
NPARC number21270735
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Record identifier9fac92d5-e186-4fcd-bc39-2bff2291f01b
Record created2014-02-17
Record modified2016-05-09
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