气候变化领域集成服务门户(CCPortal): Assimilation of RCM data in the Canadian ice concentration analysis system

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DOI	10.1016/j.rse.2024.114113
	Assimilation of RCM data in the Canadian ice concentration analysis system
	Komarov, Alexander S.; Caya, Alain; Pogson, Lynn; Buehner, Mark
发表日期	2024
ISSN	0034-4257
EISSN	1879-0704
起始页码	306
卷号	306
英文摘要	The sea and lake ice concentration pan-Arctic analysis system at Environment and Climate Change Canada (ECCC) initializes both the short-range Arctic sea ice forecasting models and numerical weather prediction tools. In this study, our previously developed approach for deriving ice concentration from RADARSAT-2 was adjusted to become applicable to the RADARSAT Constellation Mission (RCM) data. This algorithm adaptation was done by incorporating RCM beam-specific wind speed retrieval models and enhancing the quality control procedure. We found an excellent agreement (correlation = 0.996) between ice concentrations derived from nearly 4000 RCM images and ice concentrations from the image analyses manually produced by the Canadian Ice Service (CIS) over a one-year period between August 1, 2020 and July 31, 2021. Then, for data assimilation experiments in the ECCC ice analysis system, we extracted ice concentrations at 1.6 km resolution from >65,000 RCM images acquired over the same test time period and over the whole Arctic. We demonstrated that assimilation of RCMderived observations significantly improves ice analyses especially over lakes, in the vicinity to the coasts, and marginal ice zones. Accuracy of the ice analyses in the areas that are not covered by the CIS charts such as Alaska, High Arctic, and Eurasian Arctic substantially increased after the assimilation of RCM data. Visual assessment of the ice analyses against optical data showed that high-resolution details in ice concentration fields were successfully introduced by the RCM retrievals. Operational implementation of near-real-time RCM data assimilation in the ice concentration analysis system that initializes the ECCC Regional Ice-Ocean Prediction System is underway.
英文关键词	Arctic sea and lake ice; Synthetic aperture radar (SAR); RADARSAT Constellation Mission (RCM); Data assimilation; Ice analysis
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Remote Sensing ; Imaging Science & Photographic Technology
WOS类目	Environmental Sciences ; Remote Sensing ; Imaging Science & Photographic Technology
WOS记录号	WOS:001224586800001
来源期刊	REMOTE SENSING OF ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/300887
作者单位	Environment & Climate Change Canada; Environment & Climate Change Canada; Environment & Climate Change Canada; Meteorological Service of Canada; Canadian Ice Service
推荐引用方式 GB/T 7714	Komarov, Alexander S.,Caya, Alain,Pogson, Lynn,et al. Assimilation of RCM data in the Canadian ice concentration analysis system[J],2024,306.
APA	Komarov, Alexander S.,Caya, Alain,Pogson, Lynn,&Buehner, Mark.(2024).Assimilation of RCM data in the Canadian ice concentration analysis system.REMOTE SENSING OF ENVIRONMENT,306.
MLA	Komarov, Alexander S.,et al."Assimilation of RCM data in the Canadian ice concentration analysis system".REMOTE SENSING OF ENVIRONMENT 306(2024).