A double-moment parameterization for simulating autoconversion, accretion and selfcollection

Seifert, Axel; Beheng, K.D.

doi:10.1016/s0169-8095(01)00126-0

Cited by 391 publications

(407 citation statements)

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“…The usage of such relations may induce inconsistencies between cloud mass and droplet number in a model, and double moment schemes describing the evolution of the droplet number are more appropriate for online models. Coupling a two-moment cloud scheme (Lin et al, 1983;Ghan et al, 1997;Meyers et al 1997;Seifert and Beheng, 2001;Morrison et al, 2005;Morrison and Gettleman, 2008) with prognostic aerosols opens the possibility of more detailed size and composition dependent aerosol activation for both number and mass (Abdul-Razzak and Ghan, 2002). Cloud droplet number concentration may be calculated based on a prognostic representation of aerosol size and chemical composition within the framework of an ascending adiabatic cloud parcel (Nenes and Seinfeld, 2003;Fountoukis and Nenes, 2005).…”

Section: Aerosol-cloud Interactions In Online Models With Prognostic mentioning

confidence: 99%

“…Another advantage of coupling two moment cloud schemes with prognostic aerosols is a more physically detailed approach to autoconversion (Khairoutdinov and Kogan, 2000;Liu et al, 2005). The most widely used approach is to assume specific size distributions for cloud droplets and rain drops (Seifert and Beheng, 2001).…”

Section: Aerosol-cloud Interactions In Online Models With Prognostic mentioning

confidence: 99%

“…For this purpose, the model was run with the two-moment cloud microphysics scheme of Seifert and Beheng (2001) to account for the interactions of aerosols with cloud microphysics. In the first study, Bangert et al (2011) applied the model over Europe to a cloudy fiveday period in August 2005 to study the effect of aerosols on warm cloud properties and precipitation.…”

Section: Applications With Feedbacksmentioning

confidence: 99%

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Online coupled regional meteorology chemistry models in Europe: current status and prospects

et al. 2014

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Published by Copernicus Publications on behalf of the European Geosciences Union. A. Baklanov et al.: Online coupled regional meteorology chemistry models in EuropeAbstract. Online coupled mesoscale meteorology atmospheric chemistry models have undergone a rapid evolution in recent years. Although mainly developed by the air quality modelling community, these models are also of interest for numerical weather prediction and regional climate modelling as they can consider not only the effects of meteorology on air quality, but also the potentially important effects of atmospheric composition on weather. Two ways of online coupling can be distinguished: online integrated and online access coupling. Online integrated models simulate meteorology and chemistry over the same grid in one model using one main time step for integration. Online access models use independent meteorology and chemistry modules that might even have different grids, but exchange meteorology and chemistry data on a regular and frequent basis. This article offers a comprehensive review of the current research status of online coupled meteorology and atmospheric chemistry modelling within Europe. Eighteen regional online coupled models developed or being used in Europe are described and compared. Topics discussed include a survey of processes relevant to the interactions between atmospheric physics, dynamics and composition; a brief overview of existing online mesoscale models and European model developments; an analysis on how feedback processes are treated in these models; numerical issues associated with coupled models; and several case studies and model performance evaluation methods. Finally, this article highlights selected scientific issues and emerging challenges that require proper consideration to improve the reliability and usability of these models for the three scientific communities: air quality, numerical meteorology modelling (including weather prediction) and climate modelling. This review will be of particular interest to model developers and users in all three fields as it presents a synthesis of scientific progress and provides recommendations for future research directions and priorities in the development, application and evaluation of online coupled models.

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Section: Aerosol-cloud Interactions In Online Models With Prognostic mentioning

confidence: 99%

Section: Aerosol-cloud Interactions In Online Models With Prognostic mentioning

confidence: 99%

Section: Applications With Feedbacksmentioning

confidence: 99%

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Online coupled regional meteorology chemistry models in Europe: current status and prospects

et al. 2014

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“…Processes in the warm (liquid) phase considered by this scheme include the nucleation of cloud droplets, autoconversion of cloud droplets to form rain, accretion, and self-collection of rain droplets. The formulations have been derived by Seifert and Beheng (2001) from the theoretical formulation of Beheng and Doms (1986). However, the radiation scheme does not yet make use of the additional information about cloud particle sizes provided by the two-moment microphysics.…”

Section: The Cosmo-muscat Model and Revised Cloud Activationmentioning

confidence: 99%

Implementation of aerosol–cloud interactions in the regional atmosphere–aerosol model COSMO-MUSCAT(5.0) and evaluation using satellite data

et al. 2017

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Abstract. The regional atmospheric model Consortium for Small-scale Modeling (COSMO) coupled to the Multi-Scale Chemistry Aerosol Transport model (MUSCAT) is extended in this work to represent aerosol-cloud interactions. Previously, only one-way interactions (scavenging of aerosol and in-cloud chemistry) and aerosol-radiation interactions were included in this model. The new version allows for a microphysical aerosol effect on clouds. For this, we use the optional two-moment cloud microphysical scheme in COSMO and the online-computed aerosol information for cloud condensation nuclei concentrations (C ccn ), replacing the constant C ccn profile. In the radiation scheme, we have implemented a droplet-size-dependent cloud optical depth, allowing now for aerosol-cloud-radiation interactions. To evaluate the models with satellite data, the Cloud Feedback Model Intercomparison Project Observation Simulator Package (COSP) has been implemented. A case study has been carried out to understand the effects of the modifications, where the modified modeling system is applied over the European domain with a horizontal resolution of 0.25 • × 0.25 • . To reduce the complexity in aerosol-cloud interactions, only warm-phase clouds are considered. We found that the online-coupled aerosol introduces significant changes for some cloud microphysical properties. The cloud effective radius shows an increase of 9.5 %, and the cloud droplet number concentration is reduced by 21.5 %.

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“…Cloud formation and decay is controlled by a Lin-type 30 one moment bulk microphysics scheme which includes all the prognostic microphysical species (Lin et al, 1983;Seifert and Beheng, 2001). The turbulent parametrization is based on a TKE equation with a closure at level 2.5, according to Raschendorfer (2001).…”

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confidence: 99%

Data assimilation of radar reflectivity volumes in a LETKF scheme

Gastaldo¹,

Poli²,

Marsigli³

et al. 2018

Preprint

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Abstract. Quantitative precipitation forecast (QPF) is still a challenge for numerical weather prediction (NWP), despite the continuous improvement of models and data assimilation systems. In this regard, the assimilation of radar reflectivity volumes should be beneficial, since the accuracy of analysis is the element that most affects short-term QPFs. Up to now, very few attempts have been made to assimilate these observations in an operational set-up, due to the large amount of computational resources needed and to several open issues, like the arise of imbalances in the analyses and the estimation of the observational 5

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A double-moment parameterization for simulating autoconversion, accretion and selfcollection

Cited by 391 publications

References 16 publications

Online coupled regional meteorology chemistry models in Europe: current status and prospects

Online coupled regional meteorology chemistry models in Europe: current status and prospects

Implementation of aerosol–cloud interactions in the regional atmosphere–aerosol model COSMO-MUSCAT(5.0) and evaluation using satellite data

Data assimilation of radar reflectivity volumes in a LETKF scheme

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