气候变化领域集成服务门户(CCPortal): Contrasting characteristics of open-and closed-cellular stratocumulus cloud in the eastern North Atlantic

CCPortal

DOI	10.5194/acp-21-14557-2021
	Contrasting characteristics of open-and closed-cellular stratocumulus cloud in the eastern North Atlantic
	Jensen M.P.; Ghate V.P.; Wang D.; Apoznanski D.K.; Bartholomew M.J.; Giangrande S.E.; Johnson K.L.; Thieman M.M.
发表日期	2021
ISSN	1680-7316
起始页码	14557
结束页码	14571
卷号	21 期号:19
英文摘要	Extensive regions of marine boundary layer cloud impact the radiative balance through their significant shortwave albedo while having little impact on outgoing longwave radiation. Despite this importance, these cloud systems remain poorly represented in large-scale models due to difficulty in representing the processes that drive their life cycle and coverage. In particular, the mesoscale organization and cellular structure of marine boundary clouds have important implications for the subsequent cloud feedbacks. In this study, we use long-term (2013-2018) observations from the Atmospheric Radiation Measurement (ARM) Facility's Eastern North Atlantic (ENA) site on Graciosa Island, Azores, Portugal, to identify cloud cases with open-or closed-cellular organization. More than 500 h of each organization type are identified. The ARM observations are combined with reanalysis and satellite products to quantify the cloud, precipitation, aerosol, thermodynamic, and large-scale synoptic characteristics associated with these cloud types. Our analysis shows that both cloud organization populations occur during similar sea surface temperature conditions, but the open-cell cases are distinguished by stronger cold-air advection and large-scale subsidence compared to the closed-cell cases, consistent with their formation during cold-air outbreaks. We also find that the open-cell cases were associated with deeper boundary layers, stronger low-level winds, and higher rain rates compared to their closed-cell counterparts. Finally, raindrops with diameters larger than 1 mm were routinely recorded at the surface during both populations, with a higher number of large drops during the open-cellular cases. The similarities and differences noted herein provide important insights into the environmental and cloud characteristics during varying marine boundary layer cloud mesoscale organization and will be useful for the evaluation of model simulations for ENA marine clouds. © Copyright:
语种	英语
scopus关键词	albedo; boundary layer; cloud radiative forcing; longwave radiation; marine atmosphere; radiation balance; sea surface temperature; stratocumulus; Atlantic Ocean; Atlantic Ocean (North); Azores; Graciosa [Azores]; Portugal
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/246543
作者单位	Environmental and Climate Sciences Department, Brookhaven National Laboratory, Upton, NY, United States; Climate and Earth System Department, Argonne National Laboratory, Argonne, IL, United States; Department of Meteorology and Atmospheric Sciences, Pennsylvania State University, University Park, PA, United States; Science Systems and Applications, Inc., Hampton, VA, United States; Nasa Langley Research Center, Hampton, VA, United States
推荐引用方式 GB/T 7714	Jensen M.P.,Ghate V.P.,Wang D.,et al. Contrasting characteristics of open-and closed-cellular stratocumulus cloud in the eastern North Atlantic[J],2021,21(19).
APA	Jensen M.P..,Ghate V.P..,Wang D..,Apoznanski D.K..,Bartholomew M.J..,...&Thieman M.M..(2021).Contrasting characteristics of open-and closed-cellular stratocumulus cloud in the eastern North Atlantic.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(19).
MLA	Jensen M.P.,et al."Contrasting characteristics of open-and closed-cellular stratocumulus cloud in the eastern North Atlantic".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.19(2021).