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| Titel |
Summer sea ice characteristics and morphology in the Pacific Arctic sector as observed during the CHINARE 2010 cruise |
| VerfasserIn |
H. Xie, R. Lei, C. Ke, H. Wang, Z. Li, J. Zhao, S. F. Ackley |
| 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. 4 ; Nr. 7, no. 4 (2013-07-09), S.1057-1072 |
| Datensatznummer |
250017985
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| Publikation (Nr.) |
 copernicus.org/tc-7-1057-2013.pdf |
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| Zusammenfassung |
| In the summer of 2010, atmosphere–ice–ocean interaction was studied aboard
the icebreaker R/V Xuelong during the Chinese National Arctic Research
Expedition (CHINARE), in the sea ice zone of the Pacific Arctic sector
between 150° W and 180° W up to 88.5° N. The
expedition lasted from 21 July to 28 August and comprised of ice observations
and measurements along the cruise track, 8 short-term stations and one
12-day drift station. Ship-based observations of ice thickness and
concentration are compared with ice thickness measured by an electromagnetic
induction device (EM31) mounted off the ship's side and ice concentrations
obtained from AMSR-E. It is found that the modal thickness from ship-based
visual observations matches well with the modal thickness from the mounted
EM31. A grid of 8 profiles of ice thickness measurements (four repeats) was
conducted at the 12-day drift station in the central Arctic
(~ 86°50´ N–87°20´ N) and an average melt rate of 2 cm day−1,
primarily bottom melt, was found. As compared with the 2005 data from the
Healy/Oden Trans-Arctic Expedition (HOTRAX) for the same sector but
~ 20 days later (9 August to 10 September), the summer 2010
was first-year ice dominant (vs. the multi-year ice dominant in 2005),
70% or less in mean ice concentration (vs. 90% in 2005), and
94–114 cm
in mean ice thickness (vs. 150 cm in 2005). Those changes suggest the
continuation of ice thinning, less concentration, and younger ice for the
summer sea ice in the sector since 2007 when a record minimum sea ice extent
was observed. Overall, the measurements provide a valuable dataset of sea
ice morphological properties over the Arctic Pacific Sector in summer 2010
and can be used as a benchmark for measurements of future changes. |
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