气候变化领域集成服务门户(CCPortal): Lidar observations of cirrus clouds in Palau (7°33′ N, 134°48′ E)

CCPortal

DOI	10.5194/acp-21-7947-2021
	Lidar observations of cirrus clouds in Palau (7°33′ N, 134°48′ E)
	Cairo F.; De Muro M.; Snels M.; Di Liberto L.; Bucci S.; Legras B.; Kottayil A.; Scoccione A.; Ghisu S.
发表日期	2021
ISSN	1680-7316
起始页码	7947
结束页码	7961
卷号	21 期号:10
英文摘要	A polarization diversity elastic backscatter lidar was deployed on the equatorial island of Palau in February and March 2016 in the framework of the EU StratoClim project. The system operated unattended in the Palau Atmosferic Observatory from 15 February to 25 March 2016 during the nighttime. Each lidar profile extends from the ground to 30 km height. Here, the dataset is presented and discussed in terms of the temperature structure of the upper troposphere-lower stratosphere (UTLS) obtained from co-located radiosoundings. The cold-point tropopause (CPT) was higher than 17 km. During the campaign, several high-altitude clouds were observed, peaking approximately 3 km below the CPT. Their occurrence was associated with cold anomalies in the upper troposphere (UT). Conversely, when warm UT anomalies occurred, the presence of cirrus was restricted to a 5 km thick layer centred 5 km below the CPT. Thin and subvisible cirrus (SVC) were frequently detected close to the CPT. The particle depolarization ratios of these cirrus were generally lower than the values detected in the UT clouds. CPT cirrus occurrence showed a correlation with cold anomalies likely triggered by stratospheric wave activity penetrating the UT. The back-trajectories study revealed a thermal and convective history compatible with the convective outflow formation for most of the cirrus clouds, suggesting that the majority of air masses related to the clouds had encountered convection in the past and had reached the minimum temperature during its transport in less than 48 h before the observation. A subset of SVC with low depolarization and no sign of significative recent uplifting may have originated in situ. © 2021 Francesco Cairo et al.
语种	英语
scopus关键词	backscatter; cirrus; convection; data set; lidar; stratosphere; troposphere; Caroline Islands; Palau
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/246868
作者单位	National Research Council of Italy, Institute of Atmospheric Sciences and Climate (CNR-ISAC), Rome, Italy; Laboratoire de Méteórologie Dynamique (LMD), UMR CNRS 8539, CNRS, IPSL, ENS-PSL, École Polytechnique, Sorbonne Université, Paris, France; Advanced Centre for Atmospheric Radar Research, Cochin University of Science and Technology, Cochin, India; Università Degli Studi di Roma "tor Vergata", Dipartimento di Fisica, Rome, Italy; AIT Thales Alenia Space, Rome, Italy; Centro Operativo per la Meteorologia, Aeronautica Militare, Pomezia, Italy
推荐引用方式 GB/T 7714	Cairo F.,De Muro M.,Snels M.,等. Lidar observations of cirrus clouds in Palau (7°33′ N, 134°48′ E)[J],2021,21(10).
APA	Cairo F..,De Muro M..,Snels M..,Di Liberto L..,Bucci S..,...&Ghisu S..(2021).Lidar observations of cirrus clouds in Palau (7°33′ N, 134°48′ E).ATMOSPHERIC CHEMISTRY AND PHYSICS,21(10).
MLA	Cairo F.,et al."Lidar observations of cirrus clouds in Palau (7°33′ N, 134°48′ E)".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.10(2021).