A generalized approach to parameterizing convection combining ensemble and data assimilation techniques

Limiting global warming to less than 2 °C relative to pre-industrial levels would require substantial cuts in anthropogenic emissions of greenhouse gases (IPCC, 2014). Carbon capture and storage (CCS) is an important mitigation technology for reducing anthropogenic carbon dioxide (CO 2 ) emissions from industrial and energy-related point sources. In this process, CO 2 is captured, conditioned, compressed and transported to a storage location for long-term isolation from the atmosphere. Several problems can occur during CCS with impacts on the environment. Post-combustion capture from power plants entails emissions of pollutants, solvents and its degradation by-products to the atmosphere, emissions to water and generation of solid waste (e.g. Reynolds et al., 2012). During the further steps of the CCS chain, CO 2 release during transport in pipelines as well as the escape of injected CO 2 from the storage location to the atmosphere or groundwater pose risks to the environment (Koorneef et al., 2012).Modelling atmospheric oxidation of 2-aminoethanol (MEA) emitted from post-combustion capture using WRF--Chem AbstractCarbon capture and storage (CCS) is a technological solution that can reduce the amount of carbon dioxide (CO 2 ) emissions from the use of fossil fuel in power plants and other industries. A leading method today is amine based post-combustion capture, in which 2-aminoethanol (MEA) is one of the most studied absorption solvents. In this process, amines are released to the atmosphere through evaporation and entrainment from the CO 2 absorber column. Modelling is a key instrument for simulating the atmospheric dispersion and chemical transformation of MEA, and for projections of ground-level air concentrations and deposition rates. In this study, the Weather Research and Forecasting model inline coupled with chemistry, WRF--Chem, was applied to quantify the impact of using a comprehensive MEA photo-oxidation sequence compared to using a simplified MEA scheme. Main discrepancies were found for iminoethanol (roughly doubled in the detailed scheme) and 2-nitro aminoethanol, short MEA-nitramine (reduced by factor of two in the detailed scheme). The study indicates that MEA emissions from a full-scale capture plant can modify regional background levels of isocyanic acid. Predicted atmospheric concentrations of isocyanic acid were however below the limit value of 1 ppbv for ambient exposure. The dependence of the formation of hazardous compounds in the OH-initiated oxidation of MEA on ambient levels level of nitrogen oxides (NO x ) was studied in a scenario without NO x emissions from a refinery area in the vicinity of the capture plant. Hourly MEAnitramine peak concentrations higher than 40 pg m − 3 did only occur when NO x mixing ratios were above 2 ppbv. Therefore, the spatial variability and temporal variability of levels of OH and NO x need to be taken into account in the health risk assessment. The health risk due to direct emissions of nitrosamines and nitramines from full-scale CO 2 capture should be i...

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“…Grell-3 Improved version of the Grell-Devenyi scheme (Grell and Devenyi, 2002). Only applied in the inner domain (2-km resolution grid).…”

Section: Cumulusmentioning

confidence: 99%

Modelling atmospheric oxidation of 2-aminoethanol (MEA) emitted from post-combustion capture using WRF–Chem

Karl

Svendby

Walker

et al. 2015

Science of The Total Environment

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“…USA (Nasstrom et al 2007;Leone et al 2005;Skamarock et al 2005.;Leone et al;Grell and Dèvènyi, 2002;Kalnay, et al 1996).…”

Section: )unclassified

Airborne spread of foot-and-mouth disease – Model intercomparison

Gloster

Jones

Redington

et al. 2010

The Veterinary Journal

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“…Este modeloé a versão brasileira do modelo RAMS (Regional Atmospheric Modeling System ) com diversos aperfeiçoamentos numéricos e de parametrizações físicas. Além da antiga parametrização convectiva de Kuo, no BRAMS foram acrescentados, ao leque de parametrizações para convecção profunda, os esquemas de Grell (Grell & Dévényi, 2002) e de Cumulus rasos (Souza, 1999). Neste modelo também foi acrescentada uma série de rotinas para otimizar a previsão numérica do tempo.…”

Section: Introductionunclassified

“…Utilizou-se como dados de inicialização as análises do modelo ETA, de 3 em 3 horas, a partir das 00UTC do dia 19/02/03 atéàs 00UTC do dia 21/02/03. Para as duas grades foram utilizadas as seguintes opções: topografia com resolução de 10 km; diferenciação na fronteira lateral de Klemp & Wilhelmson (1978), parâmetros de radiação segundo Mahrer & Pielke (1977), parametrização convectiva de Grell & Dévényi (2002), parametrização dos coeficientes de difusão segundo Mellor & Yamada (1974), microfísica de nuvens ativada. Essas parametrizações são as que estão sendo utilizadas operacionalmente pelo Grupo de Monitoramento do Tempo (GMT-Sul/UFPel -http://gmt-sul.ufpel.edu.br) e pelo Grupo de Estudos em Previsão Regional (GEPRA/FURG -http://gepra.furg.br).…”

Section: Introductionunclassified

Ambiente sinótico e perfis verticais de um Sistema Convectivo de Mesoescala (SCM)

Pinto¹,

Campos²

2007

Rev. Bras. Geof.

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A generalized approach to parameterizing convection combining ensemble and data assimilation techniques

Cited by 1,793 publications

References 16 publications

Modelling atmospheric oxidation of 2-aminoethanol (MEA) emitted from post-combustion capture using WRF–Chem

Modelling atmospheric oxidation of 2-aminoethanol (MEA) emitted from post-combustion capture using WRF–Chem

Airborne spread of foot-and-mouth disease – Model intercomparison

Ambiente sinótico e perfis verticais de um Sistema Convectivo de Mesoescala (SCM)

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