Scopus记录号: 2-s2.0-85061712141
论文题名: On the timescales and length scales of the Arctic sea ice thickness anomalies: A study based on 14 reanalyses
作者: Ponsoni L. ; Massonnet F. ; Fichefet T. ; Chevallier M. ; Docquier D.
刊名: Cryosphere
ISSN: 19940416
出版年: 2019
卷: 13, 期: 2 起始页码: 521
结束页码: 543
语种: 英语
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. 资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122669
Appears in Collections: 气候变化事实与影响
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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
Recommended Citation:
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]. Cryosphere,2019-01-01,13(2)