DOI: 10.5194/tc-14-2029-2020
论文题名: Satellite-retrieved sea ice concentration uncertainty and its effect on modelling wave evolution in marginal ice zones
作者: Nose T. ; Waseda T. ; Kodaira T. ; Inoue J.
刊名: Cryosphere
ISSN: 19940416
出版年: 2020
卷: 14, 期: 6 起始页码: 2029
结束页码: 2052
语种: 英语
英文摘要: Ocean surface waves are known to decay when they interact with sea ice. Wave-ice models implemented in a spectral wave model, e.g. WAVEWATCH III® (WW3), derive the attenuation coefficient based on several different model ice types, i.e. how the model treats sea ice. In the marginal ice zone (MIZ) with sea ice concentration (SIC) 1, the wave attenuation is moderated by SIC: we show that subgrid-scale processes relating to the SIC and sea ice type heterogeneity in the wave-ice models are missing and the accuracy of SIC plays an important role in the predictability. Satellite-retrieved SIC data (or a sea ice model that assimilates them) are often used to force wave-ice models, but these data are known to have uncertainty. To study the effect of SIC uncertainty SIC on modelling MIZ waves during the 2018 R/V observational campaign in the refreezing Chukchi Sea, a WW3 hindcast experiment was conducted using six satellite-retrieved SIC products based on four algorithms applied to SSMIS and AMSR2 data. The results show that SIC can cause considerable wave prediction discrepancies in ice cover. There is evidence that bivariate uncertainty data (model significant wave heights and SIC forcing) are correlated, although off-ice wave growth is more complicated due to the cumulative effect of SIC along an MIZ fetch. The analysis revealed that the effect of SIC can overwhelm the uncertainty arising from the choice of model ice types, i.e. wave-ice interaction parameterisations. Despite the missing subgrid-scale physics relating to the SIC and sea ice type heterogeneity in WW3 wave-ice models - which causes significant modelling uncertainty - this study found that the accuracy of satellite-retrieved SIC used as model forcing is the dominant error source of modelling MIZ waves in the refreezing ocean. © Author(s) 2020. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164548
Appears in Collections: 气候变化与战略
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作者单位: Graduate School of Frontier Sciences, University of Tokyo, Kashiwa, Chiba, Japan; National Institute of Polar Research, Tachikawa, Tokyo, Japan
Recommended Citation:
Nose T.,Waseda T.,Kodaira T.,et al. Satellite-retrieved sea ice concentration uncertainty and its effect on modelling wave evolution in marginal ice zones[J]. Cryosphere,2020-01-01,14(6)