气候变化领域集成服务门户(CCPortal): What Drives the Life Cycle of Tropical Anvil Clouds?

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DOI	10.1029/2019MS001736
	What Drives the Life Cycle of Tropical Anvil Clouds?
	Gasparini B.; Blossey P.N.; Hartmann D.L.; Lin G.; Fan J.
发表日期	2019
ISSN	19422466
起始页码	2586
结束页码	2605
卷号	11 期号:8
英文摘要	The net radiative effects of tropical clouds are determined by the evolution of thick, freshly detrained anvil clouds into thin anvil clouds. Thick anvil clouds reduce Earth's energy balance and cool the climate, while thin anvil clouds warm the climate. To determine role of these clouds in climate change we need to understand how interactions of their microphysical and macrophysical properties control their radiative properties. We explore anvil cloud evolution using a cloud-resolving model in three-simulation setups of increasing complexity to disentangle the impacts of the various components of diabatic heating and their interaction with cloud-scale motions. The first phase of evolution and rapid cloud spreading is dominated by latent heating within convective updrafts. After the convective detrainment stops, most of the spreading and thinning of the anvil cloud is driven by cloud radiative processes and latent heating. The combination of radiative cooling at cloud top, latent cooling due to sublimation at cloud base, latent heating due to deposition and radiative heating in between leads to a sandwich-like, cooling-heating-cooling structure. The heating sandwich promotes the development of two within-anvil convective layers and a double cell circulation, dominated by strong outflow at 12-km altitude with inflow above and below. Our study reveals how small-scale processes including convective, microphysical processes, latent and radiative heating interact within the anvil cloud system. The absence or a different representation of only one component results in a significantly different cloud evolution with large impacts on cloud radiative effects. ©2019. The Authors.
英文关键词	anvil cloud; circulation; convective life cycle; high clouds; radiative effects; tropical cirrus
语种	英语
scopus关键词	Boiler circulation; Heat radiation; Radiant heating; Radiative Cooling; Tropics; Cloud radiative effects; Cloud resolving model; Cooling structures; Microphysical process; Radiative effects; Radiative properties; Small-scale process; Tropical cirrus; Climate change; altitude; atmospheric circulation; cirrus; cloud cover; cloud radiative forcing; complexity; convective cloud; cooling; energy balance; inflow; tropical region
来源期刊	Journal of Advances in Modeling Earth Systems
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/156868
作者单位	University of Washington, Seattle, WA, United States; Pacific Northwest National Laboratory, Richland, WA, United States
推荐引用方式 GB/T 7714	Gasparini B.,Blossey P.N.,Hartmann D.L.,et al. What Drives the Life Cycle of Tropical Anvil Clouds?[J],2019,11(8).
APA	Gasparini B.,Blossey P.N.,Hartmann D.L.,Lin G.,&Fan J..(2019).What Drives the Life Cycle of Tropical Anvil Clouds?.Journal of Advances in Modeling Earth Systems,11(8).
MLA	Gasparini B.,et al."What Drives the Life Cycle of Tropical Anvil Clouds?".Journal of Advances in Modeling Earth Systems 11.8(2019).