气候变化领域集成服务门户(CCPortal): Ceilometers as planetary boundary layer height detectors and a corrective tool for COSMO and IFS models

CCPortal

DOI	10.5194/acp-20-12177-2020
	Ceilometers as planetary boundary layer height detectors and a corrective tool for COSMO and IFS models
	Uzan L.; Egert S.; Khain P.; Levi Y.; Vladislavsky E.; Alpert P.
发表日期	2020
ISSN	1680-7316
起始页码	12177
结束页码	12192
卷号	20 期号:20
英文摘要	The significance of planetary boundary layer (PBL) height detection is apparent in various fields, especially in air pollution dispersion assessments. Numerical weather models produce a high spatial and temporal resolution of PBL heights; however, their performance requires validation. This necessity is addressed here by an array of eight ceilometers; a radiosonde; and two models the Integrated Forecast System (IFS) global model and COnsortium for Small-scale MOdeling (COSMO) regional model. The ceilometers were analyzed with the wavelet covariance transform method, and the radiosonde and models with the parcel method and the bulk Richardson method. Good agreement for PBL height was found between the ceilometer and the adjacent Bet Dagan radiosonde (33 m a.s.l.) at 11:00 UTC launching time (N = 91 d, ME = 4 m, RMSE = 143 m, R = 0:83). The models' estimations were then compared to the ceilometers' results in an additional five diverse regions where only ceilometers operate. A correction tool was established based on the altitude (h) and distance from shoreline (d) of eight ceilometer sites in various climate regions, from the shoreline of Tel Aviv (h = 5 m a.s.l., = 0:05 km) to eastern elevated Jerusalem (h = 830 m a.s.l., = D 53 km) and southern arid Hazerim (h = 200 m a.s.l., = 44 km). The tool examined the COSMO PBL height approximations based on the parcel method. Results from a 14 August 2015 case study, between 09:00 and 14:00 UTC, showed the tool decreased the PBL height at the shoreline and in the inner strip of Israel by ∼ 100 m and increased the elevated sites of Jerusalem and Hazerim up to ∼ 400 m, and ∼ 600 m, respectively. Cross-validation revealed good results without Bet Dagan. However, without measurements from Jerusalem, the tool underestimated Jerusalem's PBL height by up to ∼ 600 m. © 2020 Author(s).
语种	英语
scopus关键词	atmospheric modeling; atmospheric pollution; boundary layer; planetary atmosphere; radiosonde; Israel; Jerusalem [Israel]
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/247450
作者单位	Porter School of the Environment and Earth Sciences, Raymond and Beverly Sackler Faculty of Exact Sciences, Dept. of Geophysics, Tel Aviv University, Tel Aviv, 6997801, Israel; Israeli Meteorological Service, Bet Dagan, Israel
推荐引用方式 GB/T 7714	Uzan L.,Egert S.,Khain P.,et al. Ceilometers as planetary boundary layer height detectors and a corrective tool for COSMO and IFS models[J],2020,20(20).
APA	Uzan L.,Egert S.,Khain P.,Levi Y.,Vladislavsky E.,&Alpert P..(2020).Ceilometers as planetary boundary layer height detectors and a corrective tool for COSMO and IFS models.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(20).
MLA	Uzan L.,et al."Ceilometers as planetary boundary layer height detectors and a corrective tool for COSMO and IFS models".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.20(2020).