气候变化领域集成服务门户(CCPortal): A Lagrangian Perspective on Tropical Anvil Cloud Lifecycle in Present and Future Climate

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DOI	10.1029/2020JD033487
	A Lagrangian Perspective on Tropical Anvil Cloud Lifecycle in Present and Future Climate
	Gasparini B.; Rasch P.J.; Hartmann D.L.; Wall C.J.; Dütsch M.
发表日期	2021
ISSN	2169897X
卷号	126 期号:4
英文摘要	The evolution of tropical anvil clouds from their origin in deep convective cores to their slow decay determines the climatic effects of clouds in tropical convective regions. Despite the relevance of anvil clouds for climate and responses of clouds to global warming, processes dominating their evolution are not well understood. Currently available observational data reveal instantaneous snapshots of anvil cloud properties, but cannot provide a process-based perspective on anvil evolution. We therefore conduct simulations with the high resolution version of the exascale earth system model in which we track mesoscale convective systems over the tropical Western Pacific and compute trajectories that follow air parcels detrained from peaks of convective activity. With this approach we gain new insight into the anvil cloud evolution both in present day and future climate. Comparison with geostationary satellite data shows that the model is able to simulate maritime mesoscale convective systems reasonably well. Trajectory results indicate that anvil cloud lifetime is about 15 h with no significant change in a warmer climate. The anvil ice mixing ratio is larger in a warmer climate due to a larger source of ice by detrainment and larger depositional growth leading to a more negative net cloud radiative effect along detrained trajectories. However, the increases in sources are counteracted by increases in sinks of ice, particularly snow formation and sedimentation. Furthermore, we find that the mean anvil cloud feedback along trajectories is positive and consistent with results from more traditional cloud feedback calculation methods. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	anvil clouds; cirrus clouds; cloud feedbacks; convective life cycle; radiative effects; tropical convection
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/185468
作者单位	Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States; Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA, United States; Scripps Institution of Oceanography, University of California San Diego, San Diego, CA, United States; Now at University of ViennaVienna, Austria
推荐引用方式 GB/T 7714	Gasparini B.,Rasch P.J.,Hartmann D.L.,et al. A Lagrangian Perspective on Tropical Anvil Cloud Lifecycle in Present and Future Climate[J],2021,126(4).
APA	Gasparini B.,Rasch P.J.,Hartmann D.L.,Wall C.J.,&Dütsch M..(2021).A Lagrangian Perspective on Tropical Anvil Cloud Lifecycle in Present and Future Climate.Journal of Geophysical Research: Atmospheres,126(4).
MLA	Gasparini B.,et al."A Lagrangian Perspective on Tropical Anvil Cloud Lifecycle in Present and Future Climate".Journal of Geophysical Research: Atmospheres 126.4(2021).