气候变化领域集成服务门户(CCPortal): Case study of stratospheric intrusion above Hampton, Virginia: Lidar-observation and modeling analysis

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DOI	10.1016/j.atmosenv.2021.118498
	Case study of stratospheric intrusion above Hampton, Virginia: Lidar-observation and modeling analysis
	Gronoff G.; Berkoff T.; Knowland K.E.; Lei L.; Shook M.; Fabbri B.; Carrion W.; Langford A.O.
发表日期	2021
ISSN	1352-2310
卷号	259
英文摘要	On 2019-02-14, at 1:00 UTC, a large increase of ozone density at 8 km altitude was detected above Hampton, Virginia using the NASA Langley Mobile Ozone Lidar, LMOL. Ozone levels above 70 ppbv were observed down to an altitude of 4.5 km up to 5 h after the start of the event. The NASA GEOS Composition Forecast (GEOS-CF) model was used to investigate the hypothesis of a stratospheric intrusion (SI). The agreement between the model and the observations confirmed the stratospheric origin of the airmass and highlighted the capabilities of GEOS-CF to simulate intrusions. In parallel, MicroPulse Lidar (MPL) observations indicated that depolarizing particulates high in the troposphere showed downward motions linked to the intrusion. Since these particulates are linked to cirrus clouds, it is hypothesised that the SI led to an ice-virga effect. This might suggest that particulate observations can exhibit patterns of stratospheric intrusions and can be used, in certain cases, as a signature of the events. These particulates, likely ice crystals, have opposite distribution gradients compared to O3 at their interface which could be explained by a non-mixing of stratospheric and tropospheric air-masses as well as destruction of O3 by ice crystal-induced processes. Model-data comparison shows that if that latter effect exists, it has small consequences for the observed case. This work shows the capabilities of the LMOL system to detect SI and to validate the vertical and temporal modeling of SI by GEOS-CF, as well as showing that signatures of SI could be detected by MPL. © 2021 Elsevier Ltd
关键词	00–01 99-00 Lidar Model 2010 MSC Ozone Stratospheric intrusion
语种	英语
scopus关键词	Clouds; Ice; NASA; Optical radar; Particles (particulate matter); Troposphere; 00–01; 99-00; Air mass; Hampton; Lidar observation; Micropulse lidars; Model 2010 MSC; Particulates; Stratospheric intrusion; Virginia; Ozone; ice; ozone; atmospheric modeling; EOS; lidar; observational method; ozone; stratosphere; troposphere; air; Article; crystal; destruction; meteorological phenomena; meteorology; model; motion; simulation; stratosphere; stratospheric intrusion; troposphere; United States; Virginia; Hampton; United States; Virginia; Virginia
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/248370
作者单位	NASA Langley Research Center, Hampton, Va, United States; Science Systems and Applications Inc., Hampton, Va, United States; Universities Space Research Association (USRA)/GESTAR, Columbia, Md, United States; Global Modeling and Assimilation Office, NASA GSFC, Greenbelt, Md, United States; Universities Space Research Association, Columbia, Md, United States; NOAA, Boulder, Co, United States
推荐引用方式 GB/T 7714	Gronoff G.,Berkoff T.,Knowland K.E.,et al. Case study of stratospheric intrusion above Hampton, Virginia: Lidar-observation and modeling analysis[J],2021,259.
APA	Gronoff G..,Berkoff T..,Knowland K.E..,Lei L..,Shook M..,...&Langford A.O..(2021).Case study of stratospheric intrusion above Hampton, Virginia: Lidar-observation and modeling analysis.ATMOSPHERIC ENVIRONMENT,259.
MLA	Gronoff G.,et al."Case study of stratospheric intrusion above Hampton, Virginia: Lidar-observation and modeling analysis".ATMOSPHERIC ENVIRONMENT 259(2021).