Guidelines detailing the range and distribution of atmospheric dispersion model input parameter uncertainties

P. Bedwell, J. Wellings, S. Leadbetter, J. Tomas, S. Andronopoulos, I. Korsakissok, R. Périllat, Mathieu Almeida, G. Geertsema, H. Klein, H. de Vries, T. Hamburger, T. Pázmándi, C. Rudas, Andrey Sogachev, P. Szántó

Research output: Chapter in Book/Report/Conference proceedingReport chapterResearch

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Abstract

A literature review has been conducted to evaluate the range and distribution of atmospheric dispersion model-specific input parameter uncertainties. This review does not consider uncertainties associated with source term and meteorological inputs to an atmospheric dispersion model. Uncertainty ranges relating to the standard deviation of the cross wind (σy) and vertical (σz) Gaussian plume profile, the horizontal diffusivity term, Ku, the vertical diffusivity term, Kw, dry deposition velocity, surface resistance approach to dry deposition modelling, wet deposition scavenging coefficient parameter, a, wet deposition scavenging exponent parameter, b, and roughness length have all been recommended. Where possible accompanying probability distributions were also recommended. Where no alternative recommended approach can be implemented when describing the uncertainty range on the turbulent diffusion scheme for a Gaussian plume model, an alternate “second-choice” stability category, determined by expert judgement, is recommended. And it was identified that there is value in the application of model ensemble approaches for describing the uncertainty associated with the standard deviation of the cross wind and vertical Gaussian plume profile, and the below-cloud and in-cloud scavenging coefficient schemes.
These recommendations aim to facilitate the propagation of uncertainties through the chain of atmospheric dispersion and radiological assessment models both for historical scenarios (such as the accident at the Fukushima Daiichi Nuclear Power Plant) and for hypothetical scenarios. This will help improve understanding of the effect of input uncertainties on model output, and thereby appraise the impact on decision making in the context of an emergency response.
Original languageEnglish
Title of host publicationGuidelines ranking uncertainties for atmospheric dispersion
Number of pages75
PublisherEuropean joint programme for the integration of radiation protection research
Publication date2018
Chapter9.1.4
Publication statusPublished - 2018

Cite this

Bedwell, P., Wellings, J., Leadbetter, S., Tomas, J., Andronopoulos, S., Korsakissok, I., ... Szántó, P. (2018). Guidelines detailing the range and distribution of atmospheric dispersion model input parameter uncertainties. In Guidelines ranking uncertainties for atmospheric dispersion European joint programme for the integration of radiation protection research.
Bedwell, P. ; Wellings, J. ; Leadbetter, S. ; Tomas, J. ; Andronopoulos, S. ; Korsakissok, I. ; Périllat, R. ; Almeida, Mathieu ; Geertsema, G. ; Klein, H. ; de Vries, H. ; Hamburger, T. ; Pázmándi, T. ; Rudas, C. ; Sogachev, Andrey ; Szántó, P. / Guidelines detailing the range and distribution of atmospheric dispersion model input parameter uncertainties. Guidelines ranking uncertainties for atmospheric dispersion. European joint programme for the integration of radiation protection research, 2018.
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abstract = "A literature review has been conducted to evaluate the range and distribution of atmospheric dispersion model-specific input parameter uncertainties. This review does not consider uncertainties associated with source term and meteorological inputs to an atmospheric dispersion model. Uncertainty ranges relating to the standard deviation of the cross wind (σy) and vertical (σz) Gaussian plume profile, the horizontal diffusivity term, Ku, the vertical diffusivity term, Kw, dry deposition velocity, surface resistance approach to dry deposition modelling, wet deposition scavenging coefficient parameter, a, wet deposition scavenging exponent parameter, b, and roughness length have all been recommended. Where possible accompanying probability distributions were also recommended. Where no alternative recommended approach can be implemented when describing the uncertainty range on the turbulent diffusion scheme for a Gaussian plume model, an alternate “second-choice” stability category, determined by expert judgement, is recommended. And it was identified that there is value in the application of model ensemble approaches for describing the uncertainty associated with the standard deviation of the cross wind and vertical Gaussian plume profile, and the below-cloud and in-cloud scavenging coefficient schemes.These recommendations aim to facilitate the propagation of uncertainties through the chain of atmospheric dispersion and radiological assessment models both for historical scenarios (such as the accident at the Fukushima Daiichi Nuclear Power Plant) and for hypothetical scenarios. This will help improve understanding of the effect of input uncertainties on model output, and thereby appraise the impact on decision making in the context of an emergency response.",
author = "P. Bedwell and J. Wellings and S. Leadbetter and J. Tomas and S. Andronopoulos and I. Korsakissok and R. P{\'e}rillat and Mathieu Almeida and G. Geertsema and H. Klein and {de Vries}, H. and T. Hamburger and T. P{\'a}zm{\'a}ndi and C. Rudas and Andrey Sogachev and P. Sz{\'a}nt{\'o}",
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Bedwell, P, Wellings, J, Leadbetter, S, Tomas, J, Andronopoulos, S, Korsakissok, I, Périllat, R, Almeida, M, Geertsema, G, Klein, H, de Vries, H, Hamburger, T, Pázmándi, T, Rudas, C, Sogachev, A & Szántó, P 2018, Guidelines detailing the range and distribution of atmospheric dispersion model input parameter uncertainties. in Guidelines ranking uncertainties for atmospheric dispersion. European joint programme for the integration of radiation protection research.

Guidelines detailing the range and distribution of atmospheric dispersion model input parameter uncertainties. / Bedwell, P.; Wellings, J.; Leadbetter, S.; Tomas, J.; Andronopoulos, S.; Korsakissok, I.; Périllat, R.; Almeida, Mathieu; Geertsema, G.; Klein, H.; de Vries, H.; Hamburger, T.; Pázmándi, T.; Rudas, C.; Sogachev, Andrey; Szántó, P.

Guidelines ranking uncertainties for atmospheric dispersion. European joint programme for the integration of radiation protection research, 2018.

Research output: Chapter in Book/Report/Conference proceedingReport chapterResearch

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AU - Korsakissok, I.

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AU - Klein, H.

AU - de Vries, H.

AU - Hamburger, T.

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AU - Rudas, C.

AU - Sogachev, Andrey

AU - Szántó, P.

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N2 - A literature review has been conducted to evaluate the range and distribution of atmospheric dispersion model-specific input parameter uncertainties. This review does not consider uncertainties associated with source term and meteorological inputs to an atmospheric dispersion model. Uncertainty ranges relating to the standard deviation of the cross wind (σy) and vertical (σz) Gaussian plume profile, the horizontal diffusivity term, Ku, the vertical diffusivity term, Kw, dry deposition velocity, surface resistance approach to dry deposition modelling, wet deposition scavenging coefficient parameter, a, wet deposition scavenging exponent parameter, b, and roughness length have all been recommended. Where possible accompanying probability distributions were also recommended. Where no alternative recommended approach can be implemented when describing the uncertainty range on the turbulent diffusion scheme for a Gaussian plume model, an alternate “second-choice” stability category, determined by expert judgement, is recommended. And it was identified that there is value in the application of model ensemble approaches for describing the uncertainty associated with the standard deviation of the cross wind and vertical Gaussian plume profile, and the below-cloud and in-cloud scavenging coefficient schemes.These recommendations aim to facilitate the propagation of uncertainties through the chain of atmospheric dispersion and radiological assessment models both for historical scenarios (such as the accident at the Fukushima Daiichi Nuclear Power Plant) and for hypothetical scenarios. This will help improve understanding of the effect of input uncertainties on model output, and thereby appraise the impact on decision making in the context of an emergency response.

AB - A literature review has been conducted to evaluate the range and distribution of atmospheric dispersion model-specific input parameter uncertainties. This review does not consider uncertainties associated with source term and meteorological inputs to an atmospheric dispersion model. Uncertainty ranges relating to the standard deviation of the cross wind (σy) and vertical (σz) Gaussian plume profile, the horizontal diffusivity term, Ku, the vertical diffusivity term, Kw, dry deposition velocity, surface resistance approach to dry deposition modelling, wet deposition scavenging coefficient parameter, a, wet deposition scavenging exponent parameter, b, and roughness length have all been recommended. Where possible accompanying probability distributions were also recommended. Where no alternative recommended approach can be implemented when describing the uncertainty range on the turbulent diffusion scheme for a Gaussian plume model, an alternate “second-choice” stability category, determined by expert judgement, is recommended. And it was identified that there is value in the application of model ensemble approaches for describing the uncertainty associated with the standard deviation of the cross wind and vertical Gaussian plume profile, and the below-cloud and in-cloud scavenging coefficient schemes.These recommendations aim to facilitate the propagation of uncertainties through the chain of atmospheric dispersion and radiological assessment models both for historical scenarios (such as the accident at the Fukushima Daiichi Nuclear Power Plant) and for hypothetical scenarios. This will help improve understanding of the effect of input uncertainties on model output, and thereby appraise the impact on decision making in the context of an emergency response.

M3 - Report chapter

BT - Guidelines ranking uncertainties for atmospheric dispersion

PB - European joint programme for the integration of radiation protection research

ER -

Bedwell P, Wellings J, Leadbetter S, Tomas J, Andronopoulos S, Korsakissok I et al. Guidelines detailing the range and distribution of atmospheric dispersion model input parameter uncertainties. In Guidelines ranking uncertainties for atmospheric dispersion. European joint programme for the integration of radiation protection research. 2018