气候变化领域集成服务门户(CCPortal): Impact of poleward heat and moisture transports on Arctic clouds and climate simulation

CCPortal

DOI	10.5194/acp-20-2953-2020
	Impact of poleward heat and moisture transports on Arctic clouds and climate simulation
	Baek E.-H.; Kim J.-H.; Park S.; Kim B.-M.; Jeong J.-H.
发表日期	2020
ISSN	16807316
起始页码	2953
结束页码	2966
卷号	20 期号:5
英文摘要	Many general circulation models (GCMs) have difficulty simulating Arctic clouds and climate, causing substantial inter-model spread. To address this issue, two Atmospheric Model Intercomparison Project (AMIP) simulations from the Community Atmosphere Model version 5 (CAM5) and Seoul National University (SNU) Atmosphere Model version 0 (SAM0) with a unified convection scheme (UNICON) are employed to identify an effective mechanism for improving Arctic cloud and climate simulations. Over the Arctic, SAM0 produced a larger cloud fraction and cloud liquid mass than CAM5, reducing the negative Arctic cloud biases in CAM5. The analysis of cloud water condensation rates indicates that this improvement is associated with an enhanced net condensation rate of water vapor into the liquid condensate of Arctic low-level clouds, which in turn is driven by enhanced poleward transports of heat and moisture by the mean meridional circulation and transient eddies. The reduced Arctic cloud biases lead to improved simulations of surface radiation fluxes and near-surface air temperature over the Arctic throughout the year. The association between the enhanced poleward transports of heat and moisture and increase in liquid clouds over the Arctic is also evident not only in both models, but also in the multi-model analysis. Our study demonstrates that enhanced poleward heat and moisture transport in a model can improve simulations of Arctic clouds and climate. © 2020 Author(s).
关键词	arctic environment climate modeling cloud water CMIP general circulation model heat transfer moisture transfer polar region Arctic
语种	英语
来源机构	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132177
推荐引用方式 GB/T 7714	Baek E.-H.,Kim J.-H.,Park S.,et al. Impact of poleward heat and moisture transports on Arctic clouds and climate simulation[J]. Atmospheric Chemistry and Physics,2020,20(5).
APA	Baek E.-H.,Kim J.-H.,Park S.,Kim B.-M.,&Jeong J.-H..(2020).Impact of poleward heat and moisture transports on Arctic clouds and climate simulation.,20(5).
MLA	Baek E.-H.,et al."Impact of poleward heat and moisture transports on Arctic clouds and climate simulation".20.5(2020).