气候变化领域集成服务门户(CCPortal): The added value of the multi-system spread information for ocean heat content and steric sea level investigations in the CMEMS GREP ensemble reanalysis product

CCPortal

DOI	10.1007/s00382-018-4585-5
	The added value of the multi-system spread information for ocean heat content and steric sea level investigations in the CMEMS GREP ensemble reanalysis product
	Storto A.; Masina S.; Simoncelli S.; Iovino D.; Cipollone A.; Drevillon M.; Drillet Y.; von Schuckman K.; Parent L.; Garric G.; Greiner E.; Desportes C.; Zuo H.; Balmaseda M.A.; Peterson K.A.
发表日期	2019
ISSN	0930-7575
起始页码	287
结束页码	312
卷号	53 期号:2020-01-02
英文摘要	Since 2016, the Copernicus Marine Environment Monitoring Service (CMEMS) has produced and disseminated an ensemble of four global ocean reanalyses produced at eddy-permitting resolution for the period from 1993 to present, called GREP (Global ocean Reanalysis Ensemble Product). This dataset offers the possibility to investigate the potential benefits of a multi-system approach for ocean reanalyses, since the four reanalyses span by construction the same spatial and temporal scales. In particular, our investigations focus on the added value of the information on the ensemble spread, implicitly contained in the GREP ensemble, for temperature, salinity, and steric sea level studies. It is shown that in spite of the small ensemble size, the spread is capable of estimating the flow-dependent uncertainty in the ensemble mean, although proper re-scaling is needed to achieve reliability. The GREP members also exhibit larger consistency (smaller spread) than their predecessors, suggesting advancement with time of the reanalysis vintage. The uncertainty information is crucial for monitoring the climate of the ocean, even at regional level, as GREP shows consistency with CMEMS high-resolution regional products and complement the regional estimates with uncertainty estimates. Further applications of the spread include the monitoring of the impact of changes in ocean observing networks; the use of multi-model ensemble anomalies in hybrid ensemble-variational retrospective analysis systems, which outperform static covariances and represent a promising application of GREP. Overall, the spread information of the GREP product is found to significantly contribute to the crucial requirement of uncertainty estimates for climatic datasets. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Hybrid data assimilation; Observation impact; Ocean synthesis, reanalysis accuracy; Uncertainty
语种	英语
scopus关键词	accuracy assessment; data assimilation; data set; ensemble forecasting; monitoring; sea level change; sea surface salinity; sea surface temperature; uncertainty analysis
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146205
作者单位	Ocean Modeling and Data Assimilation Division, Centro Euro-Mediterraneo sui Cambiamenti Climatici, Bologna, Italy; National Institute for Geophysics and Volcanology (INGV), Bologna, Italy; Mercator Ocean, Ramonville Saint-Agne, France; Collecte Localisation Satellites (CLS), Ramonville Saint-Agne, France; European Center for Medium Range Weather Forecasts (ECMWF), Reading, United Kingdom; Met Office, Exeter, United Kingdom; Andrea Storto, Centre for Maritime Research and Experimentation (CMRE), viale San Bartolomeo 400, La Spezia, 19126, Italy
推荐引用方式 GB/T 7714	Storto A.,Masina S.,Simoncelli S.,et al. The added value of the multi-system spread information for ocean heat content and steric sea level investigations in the CMEMS GREP ensemble reanalysis product[J],2019,53(2020-01-02).
APA	Storto A..,Masina S..,Simoncelli S..,Iovino D..,Cipollone A..,...&Peterson K.A..(2019).The added value of the multi-system spread information for ocean heat content and steric sea level investigations in the CMEMS GREP ensemble reanalysis product.Climate Dynamics,53(2020-01-02).
MLA	Storto A.,et al."The added value of the multi-system spread information for ocean heat content and steric sea level investigations in the CMEMS GREP ensemble reanalysis product".Climate Dynamics 53.2020-01-02(2019).