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DOI | 10.1007/s00382-015-2675-1 |
The new eddy-permitting ORAP5 ocean reanalysis: description, evaluation and uncertainties in climate signals | |
Zuo, Hao; Balmaseda, Magdalena A.; Mogensen, Kristian | |
2017-08-01 | |
发表期刊 | CLIMATE DYNAMICS |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2017 |
卷号 | 49期号:3 |
文章类型 | Article |
语种 | 英语 |
国家 | England |
英文摘要 | A new eddy-permitting ocean reanalysis has been recently completed at ECMWF. It is called Ocean ReAnalysis Pilot 5 (ORAP5), and it spans the period 1979-2012. This work describes the new system, evaluates its performance, and investigates how the estimation of climate indices are affected by the assimilation system settings. ORAP5 introduces several upgrades with respect to its predecessor ORAS4, including increased horizontal and vertical resolution, an prognostic sea-ice component, new versions of the ocean and data assimilation system, revised surface fluxes, new version and treatment of satellite sea surface height data, and assimilation of sea-ice concentration, among others. ORAP5 shows similar performance to ORAS4, with improvements in the northern extratropics (especially in salinity), and slight degradation in the Southern Ocean, probably because the observations are insufficient to constrain the increased level of variability in ORAP5. The sensitivity experiments show that superobbing of altimeter data and correlation length-scales of the background errors have a visible impact on the time evolution of global steric height and its partition into thermo/halo-steric contributions. The sensitivities are especially large in the pre-Argo period, when there is the risk of producing unrealistic steric height variations by overfitting the altimeter data. Compared with a control run without data assimilation, all the assimilation experiments also show stronger variability in the halosteric component in the pre-Argo period. The results highlight the importance of sub-surface observations to assist the assimilation of altimeter data, and the need of using a variety of metrics for evaluating ocean reanalysis systems. |
英文关键词 | Ocean reanalyses Sea level Sensitivity experiment |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000407244700006 |
WOS关键词 | DATA ASSIMILATION ; TEMPERATURE ; CIRCULATION ; IMPACT ; MODEL |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/35594 |
专题 | 气候变化 |
作者单位 | European Ctr Medium Range Weather Forecasts, Reading, Berks, England |
推荐引用方式 GB/T 7714 | Zuo, Hao,Balmaseda, Magdalena A.,Mogensen, Kristian. The new eddy-permitting ORAP5 ocean reanalysis: description, evaluation and uncertainties in climate signals[J]. CLIMATE DYNAMICS,2017,49(3). |
APA | Zuo, Hao,Balmaseda, Magdalena A.,&Mogensen, Kristian.(2017).The new eddy-permitting ORAP5 ocean reanalysis: description, evaluation and uncertainties in climate signals.CLIMATE DYNAMICS,49(3). |
MLA | Zuo, Hao,et al."The new eddy-permitting ORAP5 ocean reanalysis: description, evaluation and uncertainties in climate signals".CLIMATE DYNAMICS 49.3(2017). |
条目包含的文件 | 条目无相关文件。 |
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