气候变化领域集成服务门户(CCPortal): Impacts of Aerosol and Environmental Conditions on Maritime and Continental Deep Convective Systems Using a Bin Microphysical Model

CCPortal

DOI	10.1029/2019JD030952
	Impacts of Aerosol and Environmental Conditions on Maritime and Continental Deep Convective Systems Using a Bin Microphysical Model
	Iguchi T.; Rutledge S.A.; Tao W.-K.; Matsui T.; Dolan B.; Lang S.E.; Barnum J.
发表日期	2020
ISSN	2169897X
卷号	125 期号:12
英文摘要	A series of model simulations were conducted to investigate the effects of cloud condensation nuclei (CCN) loading and convective available potential energy (CAPE) on tropical maritime and midlatitude continental deep convection. Dynamical downscaling from global aerosol reanalysis was used to represent aerosol fields for the two convective regimes. We describe a control run and multiple sensitivity experiments using a limited-area model, employing spectral-bin cloud microphysics. The CCN loading is perturbed between the target maritime and continental conditions, roughly 40–2,000 cm−3 at 850 hPa and 1% supersaturation. Surface precipitation rates monotonically increase with increasing CCN loading for both the maritime and continental situations, while these monotonic increases are disrupted in the simulations with reduced CAPE. The increase in precipitation is in the form of convective precipitation, at the expense of stratiform precipitation. CCN increases promote increases in supercooled cloud water, in agreement with previous modeling studies. However, in the simulations investigated herein, the changes in supercooled water have different impacts on the cloud microphysics in the maritime and continental simulations. Increased supercooled water contents lead to more hail and less graupel in the continental simulation. For the maritime simulation, enhanced supercooled cloud water contents promote an increase in graupel since little or no hail is produced. This distinction is due to the difference in relative magnitudes and peak altitudes of supercooled water and snow amounts, which is further attributable to moisture and dynamical differences in the two cases. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	aerosol and clouds; deep convective systems; mesoscale modeling; spectral bin microphysics
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185957
作者单位	Earth System Science Interdisciplinary Center, University of Maryland, College Park, MD, United States; NASA Goddard Space Flight Center, Greenbelt, MD, United States; Department of Atmospheric Science, Colorado State University, Fort Collins, CO, United States; Science Systems and Applications, Inc., Lanham, MD, United States; Now at Laboratory for Atmospheric and Space Physics, Boulder, CO, United States
推荐引用方式 GB/T 7714	Iguchi T.,Rutledge S.A.,Tao W.-K.,et al. Impacts of Aerosol and Environmental Conditions on Maritime and Continental Deep Convective Systems Using a Bin Microphysical Model[J],2020,125(12).
APA	Iguchi T..,Rutledge S.A..,Tao W.-K..,Matsui T..,Dolan B..,...&Barnum J..(2020).Impacts of Aerosol and Environmental Conditions on Maritime and Continental Deep Convective Systems Using a Bin Microphysical Model.Journal of Geophysical Research: Atmospheres,125(12).
MLA	Iguchi T.,et al."Impacts of Aerosol and Environmental Conditions on Maritime and Continental Deep Convective Systems Using a Bin Microphysical Model".Journal of Geophysical Research: Atmospheres 125.12(2020).