气候变化领域集成服务门户(CCPortal): Coupling Between Land Surface Fluxes and Lifting Condensation Level: Mechanisms and Sensitivity to Model Physics Parameterizations

CCPortal

DOI	10.1029/2020JD034313
	Coupling Between Land Surface Fluxes and Lifting Condensation Level: Mechanisms and Sensitivity to Model Physics Parameterizations
	Wei J.; Zhao J.; Chen H.; Liang X.-Z.
发表日期	2021
ISSN	2169897X
卷号	126 期号:5
英文摘要	Biases in land-atmosphere interaction simulations may originate from different model components or parameterizations and are transferred to the land-atmosphere system, which causes biases in weather and climate predictions. With a focus on East Asia, we analyze the relationships between land surface sensible and latent heat fluxes (SH and LH), evaporative fraction (EF), soil moisture, and lifting condensation level (LCL) height in ERA5 and MERRA-2 reanalyzes and simulations from a regional climate model (CWRF) with multiple parameterizations. The results show that SH (soil moisture and EF) is generally positively (negatively) correlated with LCL height because of their mutual positive (negative) influence and the positive feedback loops. The LH-LCL relationship is sensitive to the local climate and generally positive in humid climates and negative in the semiarid climate; however, only negative correlations can be indicative of a possible impact of LH on LCL. MERRA-2 shows an overall stronger influence of land on LCL height than ERA5 and CWRF. Different CWRF parameterizations produce different and sometimes contrasting LH-LCL relationships, which is strongly related to the simulated climate and can be validated. This highlights the need for a deep process-level understanding of land-atmosphere interactions in coupled model simulations. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	CWRF; land surface fluxes; land-atmosphere interactions; lifting condensation level; multiple parameterizations
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/185421
作者单位	Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters/Key Laboratory of Meteorological Disaster, Ministry of Education/International Joint Research Laboratory on Climate and Environment Change, Nanjing University of Information Science and Technology, Nanjing, China; Department of Atmospheric and Oceanic Science and Earth System Science Interdisciplinary Center, University of Maryland, College Park, MD, United States
推荐引用方式 GB/T 7714	Wei J.,Zhao J.,Chen H.,et al. Coupling Between Land Surface Fluxes and Lifting Condensation Level: Mechanisms and Sensitivity to Model Physics Parameterizations[J],2021,126(5).
APA	Wei J.,Zhao J.,Chen H.,&Liang X.-Z..(2021).Coupling Between Land Surface Fluxes and Lifting Condensation Level: Mechanisms and Sensitivity to Model Physics Parameterizations.Journal of Geophysical Research: Atmospheres,126(5).
MLA	Wei J.,et al."Coupling Between Land Surface Fluxes and Lifting Condensation Level: Mechanisms and Sensitivity to Model Physics Parameterizations".Journal of Geophysical Research: Atmospheres 126.5(2021).