气候变化领域集成服务门户(CCPortal): Evaluation of land-atmosphere processes of the Polar WRF in the summertime Arctic tundra

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DOI	10.1016/j.atmosres.2020.104946
	Evaluation of land-atmosphere processes of the Polar WRF in the summertime Arctic tundra
	Kim J.; Lee J.; Hong J.-W.; Hong J.; Koo J.-H.; Kim J.-H.; Yun J.; Nam S.; Jung J.Y.; Choi T.; Lee B.Y.
发表日期	2020
ISSN	0169-8095
卷号	240
英文摘要	Arctic tundra is undergoing a rapid transition due to global warming and will be exposed to snow-free conditions for longer periods under projected climate scenarios. Regional climate modeling is useful for understanding and predicting climate change in the Arctic tundra, however, the lack of in-situ observations of surface energy fluxes and the planetary boundary layer (PBL) structure hinders accurate predictions of local and regional climate around the Arctic. In this study, we investigate the performance of the Polar-optimized version of the Weather Research and Forecasting model (PWRF) in the Arctic tundra on clear days in summer. Based on simultaneous observations of surface fluxes and the PBL structure in Cambridge Bay, Nunavut, Canada, our validation shows that the PWRF simulates a drier environment, leading to a larger Bowen ratio and a warmer atmosphere compared to observations. Further sensitivity analyses indicate that the model biases are mainly from the uncertainties in physical parameters such as surface albedo and emissivity, the solar constant, and the model top height, rather than structural flaws in the model physics. Importantly, the PWRF reproduces the observations more accurately when the observed soil moisture is fed into the simulation. This indicates that there must be improvements in simulations of the land-atmosphere interaction at the Arctic tundra, not only in the accuracy of the initial soil moisture conditions but also in soil hydraulic properties and drainage processes. The mixing diagram analysis also shows that the entrainment process between the PBL and the overlying atmosphere needs to be improved for better weather and climate simulation. Our findings shed light on modeling studies in the Arctic region by disentangling the model error sources from uncertainties by parameters and physics package options. © 2020 The Authors
关键词	Atmospheric thermodynamics Boundary layers Global warming Interfacial energy Landforms Sensitivity analysis Soil moisture Solar radiation Uncertainty analysis Arctic tundra Land atmosphere interaction Planetary boundary layers Polar WRF Regional climate modeling Simultaneous observation Soil hydraulic properties Weather research and forecasting models Weather forecasting boundary layer Bowen ratio energy balance land-atmosphere interaction sensitivity analysis soil moisture summer tundra weather forecasting Arctic Cambridge Bay Canada Nunavut Victoria Island [Canada]
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/132483
推荐引用方式 GB/T 7714	Kim J.,Lee J.,Hong J.-W.,et al. Evaluation of land-atmosphere processes of the Polar WRF in the summertime Arctic tundra[J]. Atmospheric Research,2020,240.
APA	Kim J..,Lee J..,Hong J.-W..,Hong J..,Koo J.-H..,...&Lee B.Y..(2020).Evaluation of land-atmosphere processes of the Polar WRF in the summertime Arctic tundra.,240.
MLA	Kim J.,et al."Evaluation of land-atmosphere processes of the Polar WRF in the summertime Arctic tundra".240(2020).