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DOI	10.1016/j.atmosenv.2020.118105
	Determination of radiological background fields designated for inverse modelling during atypical low wind speed meteorological episode
	Pecha P.; Tichý O.; Pechová E.
发表日期	2021
ISSN	1352-2310
卷号	246
英文摘要	This article focuses on the formation of complex trajectories of radiological background fields for atypical accidental discharges of radioactivity into the atmosphere during very low wind speed episodes (calms). Within several hours of a calm meteorological situation, a relatively significant level of radioactivity can be accumulated around the source. In the next stage, the calm situation is assumed to terminate and convective movement of the air immediately starts. A packet of accumulated radioactivity, which has the form of multiple Gaussian puffs, is drifted by wind. Consequently, the pollution is disseminated over the terrain. Significant transport of radioactivity even behind the protective zone of a nuclear facility (up to between 15 and 20 km) has been observed. Original optional statistical pre-processing of calm's results is inserted between the calm and convective stages of the trajectory generation which may improve performance of following computationally expensive methods of Bayesian filtering. Determination of complex trajectory passing through both calm and convective stages of the release scenario represents inevitable prior information for prospective assimilation techniques. Draft twin experiment is outlined for a simple assimilation scenario for re-estimation of the main model parameters based on a notional monitoring network in the outer convective region. © 2020 Elsevier Ltd
英文关键词	Complex networks; Inverse problems; Radiation; Radioactivity; Stages; Trajectories; Bayesian filtering; Complex trajectories; Improve performance; Inverse modelling; Monitoring network; Nuclear facilities; Prior information; Trajectory generation; Wind; Bayesian analysis; detection method; estimation method; field method; meteorology; modeling; movement; parameter estimation; radioactivity; wind velocity; adult; article; atmospheric dispersion; filtration; radioactivity; wind speed
语种	英语
来源期刊	Atmospheric Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169049
作者单位	Institute of Information Theory and Automation of the Czech Academy of Sciences, v.v.i.,Pod Vodarenskou vezi 4, Prague 8, 182 08, Czech Republic; Institute of Nuclear Research, Subdivision EGP, Rez near Prague, Czech Republic
推荐引用方式 GB/T 7714	Pecha P.,Tichý O.,Pechová E.. Determination of radiological background fields designated for inverse modelling during atypical low wind speed meteorological episode[J],2021,246.
APA	Pecha P.,Tichý O.,&Pechová E..(2021).Determination of radiological background fields designated for inverse modelling during atypical low wind speed meteorological episode.Atmospheric Environment,246.
MLA	Pecha P.,et al."Determination of radiological background fields designated for inverse modelling during atypical low wind speed meteorological episode".Atmospheric Environment 246(2021).