globalchange  > 气候变化与战略
DOI: 10.5194/tc-14-2173-2020
论文题名:
The MOSAiC ice floe: Sediment-laden survivor from the Siberian shelf
作者: Krumpen T.; Birrien F.; Kauker F.; Rackow T.; Von Albedyll L.; Angelopoulos M.; Jakob Belter H.; Bessonov V.; Damm E.; Dethloff K.; Haapala J.; Haas C.; Harris C.; Hendricks S.; Hoelemann J.; Hoppmann M.; Kaleschke L.; Karcher M.; Kolabutin N.; Lei R.; Lenz J.; Morgenstern A.; Nicolaus M.; Nixdorf U.; Petrovsky T.; Rabe B.; Rabenstein L.; Rex M.; Ricker R.; Rohde J.; Shimanchuk E.; Singha S.; Smolyanitsky V.; Sokolov V.; Stanton T.; Timofeeva A.; Tsamados M.; Watkins D.
刊名: Cryosphere
ISSN: 19940416
出版年: 2020
卷: 14, 期:7
起始页码: 2173
结束页码: 2187
语种: 英语
英文关键词: energy budget ; ice breaker ; ice flow ; sea ice ; sediment analysis ; Arctic Ocean
英文摘要: In September 2019, the research icebreaker Polarstern started the largest multidisciplinary Arctic expedition to date, the MOSAiC (Multidisciplinary drifting Observatory for the Study of Arctic Climate) drift experiment. Being moored to an ice floe for a whole year, thus including the winter season, the declared goal of the expedition is to better understand and quantify relevant processes within the atmosphere-ice-ocean system that impact the sea ice mass and energy budget, ultimately leading to much improved climate models. Satellite observations, atmospheric reanalysis data, and readings from a nearby meteorological station indicate that the interplay of high ice export in late winter and exceptionally high air temperatures resulted in the longest ice-free summer period since reliable instrumental records began. We show, using a Lagrangian tracking tool and a thermodynamic sea ice model, that the MOSAiC floe carrying the Central Observatory (CO) formed in a polynya event north of the New Siberian Islands at the beginning of December 2018. The results further indicate that sea ice in the vicinity of the CO (<40 km distance) was younger and 36 % thinner than the surrounding ice with potential consequences for ice dynamics and momentum and heat transfer between ocean and atmosphere. Sea ice surveys carried out on various reference floes in autumn 2019 verify this gradient in ice thickness, and sediments discovered in ice cores (so-called dirty sea ice) around the CO confirm contact with shallow waters in an early phase of growth, consistent with the tracking analysis. Since less and less ice from the Siberian shelves survives its first summer (Krumpen et al., 2019), the MOSAiC experiment provides the unique opportunity to study the role of sea ice as a transport medium for gases, macronutrients, iron, organic matter, sediments and pollutants from shelf areas to the central Arctic Ocean and beyond. Compared to data for the past 26 years, the sea ice encountered at the end of September 2019 can already be classified as exceptionally thin, and further predicted changes towards a seasonally ice-free ocean will likely cut off the long-range transport of ice-rafted materials by the Transpolar Drift in the future. A reduced long-range transport of sea ice would have strong implications for the redistribution of biogeochemical matter in the central Arctic Ocean, with consequences for the balance of climate-relevant trace gases, primary production and biodiversity in the Arctic Ocean. © Author(s) 2020. This work is distributed under the Creative Commons Attribution 4.0 License.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164508
Appears in Collections:气候变化与战略

Files in This Item:

There are no files associated with this item.


作者单位: Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Am Handelshafen 12, Bremerhaven, 27570, Germany; Arctic and Antarctic Research Institute, Ulitsa Beringa, 38, Saint Petersburg, 199397, Russian Federation; Finnish Meteorological Institute, Marine Research, P.O. Box 503, Helsinki, 00101, Finland; Dartmouth College, Department of Earth Science, 6105 Fairchild Hall, Hanover, NH 03755, United States; Polar Research Institute of China, MNR Key Laboratory for Polar Science, 451 Jinqiao Road, Pudong, Shanghai, 200136, China; Association of Polar Early Career Scientists, Alfred Wegener Institute for Polar and Marine Research, Telegrafenberg A45, Potsdam, 14473, Germany; Drift and Noise Polar Services, Stavendamm 17, Bremen, 28195, Germany; German Aerospace Center, Remote Sensing Technology Institute, SAR Signal Processing, Am Fallturm 9, Bremen, 28359, Germany; Naval Postgraduate School, Oceanography Department, 833 Dyer Road, Building 232, Monterey, 93943, United States; Centre for Polar Observation and Modelling, University College London, Dept. of Earth Science, 5 Gower Place, London, WC1E 6BS, United Kingdom; College of Earth, Ocean, and Atmospheric Science, Oregon State University, Corvallis, OR, United States

Recommended Citation:
Krumpen T.,Birrien F.,Kauker F.,et al. The MOSAiC ice floe: Sediment-laden survivor from the Siberian shelf[J]. Cryosphere,2020-01-01,14(7)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Krumpen T.]'s Articles
[Birrien F.]'s Articles
[Kauker F.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Krumpen T.]'s Articles
[Birrien F.]'s Articles
[Kauker F.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Krumpen T.]‘s Articles
[Birrien F.]‘s Articles
[Kauker F.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.