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DOI	10.5194/tc-13-521-2019
	On the timescales and length scales of the Arctic sea ice thickness anomalies: A study based on 14 reanalyses
	Ponsoni L.; Massonnet F.; Fichefet T.; Chevallier M.; Docquier D.
发表日期	2019
ISSN	19940416
EISSN	13
起始页码	521
结束页码	543
卷号	13 期号:2
英文摘要	The ocean-sea ice reanalyses are one of the main sources of Arctic sea ice thickness data both in terms of spatial and temporal resolution, since observations are still sparse in time and space. In this work, we first aim at comparing how the sea ice thickness from an ensemble of 14 reanalyses compares with different sources of observations, such as moored upward-looking sonars, submarines, airbornes, satellites, and ice boreholes. Second, based on the same reanalyses, we intend to characterize the timescales (persistence) and length scales of sea ice thickness anomalies. We investigate whether data assimilation of sea ice concentration by the reanalyses impacts the realism of sea ice thickness as well as its respective timescales and length scales. The results suggest that reanalyses with sea ice data assimilation do not necessarily perform better in terms of sea ice thickness compared with the reanalyses which do not assimilate sea ice concentration. However, data assimilation has a clear impact on the timescales and length scales: reanalyses built with sea ice data assimilation present shorter timescales and length scales. The mean timescales and length scales for reanalyses with data assimilation vary from 2.5 to 5.0 months and 337.0 to 732.5 km, respectively, while reanalyses with no data assimilation are characterized by values from 4.9 to 7.8 months and 846.7 to 935.7 km, respectively. © 2019. This work is distributed under the Creative Commons Attribution 4.0 License.
学科领域	data assimilation; ensemble forecasting; ice thickness; sea ice; sonar; spatial resolution; timescale; Arctic Ocean
语种	英语
scopus关键词	data assimilation; ensemble forecasting; ice thickness; sea ice; sonar; spatial resolution; timescale; Arctic Ocean
来源期刊	The Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/118928
作者单位	Georges Lemaitre Centre for Earth and Climate Research (TECLIM), Earth and Life Institute, Universite Catholique de Louvain, Louvain-la-Neuve, Belgium; Centre National de Recherches Meteorologiques (CNRM), CNRS UMR3589, Toulouse, Meteo, France
推荐引用方式 GB/T 7714	Ponsoni L.,Massonnet F.,Fichefet T.,et al. On the timescales and length scales of the Arctic sea ice thickness anomalies: A study based on 14 reanalyses[J],2019,13(2).
APA	Ponsoni L.,Massonnet F.,Fichefet T.,Chevallier M.,&Docquier D..(2019).On the timescales and length scales of the Arctic sea ice thickness anomalies: A study based on 14 reanalyses.The Cryosphere,13(2).
MLA	Ponsoni L.,et al."On the timescales and length scales of the Arctic sea ice thickness anomalies: A study based on 14 reanalyses".The Cryosphere 13.2(2019).