气候变化领域集成服务门户(CCPortal): A Climatological View of Horizontal Ice Plates in Clouds: Findings From Nadir and Off-Nadir CALIPSO Observations

CCPortal

DOI	10.1029/2020JD033562
	A Climatological View of Horizontal Ice Plates in Clouds: Findings From Nadir and Off-Nadir CALIPSO Observations
	Kikuchi M.; Okamoto H.; Sato K.
发表日期	2021
ISSN	2169897X
卷号	126 期号:9
英文摘要	We study horizontal ice plates in clouds using satellite lidar measurements of the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO). This study investigates global microphysical and geographical properties of horizontal ice plates to obtain insights into ice-plate climatology based on lidar’s long-term measurements during 2006–2014. We then summarize the effects of the lidar's viewing angle change from 0.3° to 3.0° in 2007 on satellite particle phase/shape classifications. Using a classification algorithm developed in the previous studies, we show that the ice plate detection decreases by 81.7% due the tilting. With an updated version of this algorithm, 30.8% of these are recovered, although 50.8% remain undetected. Nevertheless, this study also shows that geographical characteristics of ice plates are still preserved during the off-nadir period (within the remaining 50%), suggesting the undiscovered climatological information on ice plates in the post-2007 observations. According to our analysis, the tilting mainly affects horizontal ice plate detection, while the impacts on water and randomly oriented ice detections are limited. The temperature of the ice plates ranges from −25.5°C and −7.5°C, with a mode temperature of −13.5°C, although the ice plates also occur ubiquitously across mid- to high-latitudes between −20°C and −40°C, which is much colder than what found in previous nadir studies. This study offers a detailed discussion on the fundamental characteristics of horizontal ice plates that will provide robust information for the algorithm preparation for future satellite lidar observations such as the Earth, Clouds, Aerosol and Radiation Explorer (EarthCARE). © 2021. The Authors.
英文关键词	Cloud; ice plate; lidar; satellite
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/185243
作者单位	Earth Observation Research Center, Japan Aerospace Exploration Agency, Ibaraki, Japan; Centre for Water, Climate and Land, the University of Newcastle, Newcastle, NSW, Australia; Research Institute for Applied Mechanics, Kyushu University, Fukuoka, Japan
推荐引用方式 GB/T 7714	Kikuchi M.,Okamoto H.,Sato K.. A Climatological View of Horizontal Ice Plates in Clouds: Findings From Nadir and Off-Nadir CALIPSO Observations[J],2021,126(9).
APA	Kikuchi M.,Okamoto H.,&Sato K..(2021).A Climatological View of Horizontal Ice Plates in Clouds: Findings From Nadir and Off-Nadir CALIPSO Observations.Journal of Geophysical Research: Atmospheres,126(9).
MLA	Kikuchi M.,et al."A Climatological View of Horizontal Ice Plates in Clouds: Findings From Nadir and Off-Nadir CALIPSO Observations".Journal of Geophysical Research: Atmospheres 126.9(2021).