气候变化领域集成服务门户(CCPortal): A study of the effect of regenerated CCN on marine stratocumulus cloud development using the WRF-LES model with spectral bin microphysics scheme

CCPortal

DOI	10.1016/j.atmosres.2020.105100
	A study of the effect of regenerated CCN on marine stratocumulus cloud development using the WRF-LES model with spectral bin microphysics scheme
	Choi K.O.; Yum S.S.; Chang D.Y.; Yeom J.M.; Lee S.S.
发表日期	2020
ISSN	0169-8095
卷号	246
英文摘要	Impacts of regenerated cloud condensation nuclei (CCN) on daytime marine stratocumulus clouds (MSC) and stratocumulus-topped boundary layer (STBL) are investigated, by implementing five different CCN regeneration methods in the spectral bin microphysics (SBM) scheme of the Weather Research and Forecasting (WRF) large eddy simulation (LES) model. Without the CCN regeneration process, the model shows unrealistic reduction of total (cloud drops + CCN) particle concentrations but produces very large cloud drops, compared to observations. Such reduction of particle concentrations is remedied when CCN regeneration process is implemented in the model. Evaluation of the model performance with aircraft measurement data confirms that CCN regeneration is critical for realistic simulation of MSC development. However, depending on the selected CCN regeneration method, results vary significantly especially at a later hour of simulation time (5 h). Such variabilities of the microphysical properties and dynamical structures are caused mainly by the different ways of regenerating CCN particles after entrainment of warm and dry air and subsequent evaporation of cloud drops near cloud top, which, in turn, affects cloud radiative properties such as SW heating and LW cooling that drives STBL convection. We are confident that this study can provide a guidance for simulating more realistic three-dimensional MSC cloud development by including the crucial process of CCN regeneration in the SBM scheme. All in all, we recommend the methods, which primarily replenish the depleted CCN with large CCN. © 2020 Elsevier B.V.
关键词	Air entrainment Boundary layers Clouds Digital storage Drops Large eddy simulation Aircraft measurement Cloud condensation nuclei Cloud radiative properties Marine stratocumulus clouds Microphysical property Particle concentrations Stratocumulus-topped boundary layers Weather research and forecasting Weather forecasting cloud condensation nucleus cloud droplet cloud microphysics entrainment large eddy simulation stratocumulus weather forecasting
语种	英语
来源机构	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132357
推荐引用方式 GB/T 7714	Choi K.O.,Yum S.S.,Chang D.Y.,et al. A study of the effect of regenerated CCN on marine stratocumulus cloud development using the WRF-LES model with spectral bin microphysics scheme[J]. Atmospheric Research,2020,246.
APA	Choi K.O.,Yum S.S.,Chang D.Y.,Yeom J.M.,&Lee S.S..(2020).A study of the effect of regenerated CCN on marine stratocumulus cloud development using the WRF-LES model with spectral bin microphysics scheme.,246.
MLA	Choi K.O.,et al."A study of the effect of regenerated CCN on marine stratocumulus cloud development using the WRF-LES model with spectral bin microphysics scheme".246(2020).