Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-10051-2017 |
PathfinderTURB: an automatic boundary layer algorithm. Development, validation and application to study the impact on in situ measurements at the Jungfraujoch | |
Poltera, Yann1,3; Martucci, Giovanni1; Coen, Martine Collaud1; Hervo, Maxime1; Emmenegger, Lukas2; Henne, Stephan2; Brunner, Dominik2; Haefele, Alexander1 | |
2017-08-28 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:16 |
文章类型 | Article |
语种 | 英语 |
国家 | Switzerland |
英文摘要 | We present the development of the PathfinderTURB algorithm for the analysis of ceilometer backscatter data and the real-time detection of the vertical structure of the planetary boundary layer. Two aerosol layer heights are retrieved by PathfinderTURB: the convective boundary layer (CBL) and the continuous aerosol layer (CAL). PathfinderTURB combines the strengths of gradient-and variance-based methods and addresses the layer attribution problem by adopting a geodesic approach. The algorithm has been applied to 1 year of data measured by two ceilometers of type CHM15k, one operated at the Aerological Observatory of Payerne (491ma.s.l.) on the Swiss plateau and one at the Kleine Scheidegg (2061ma.s.l.) in the Swiss Alps. The retrieval of the CBL has been validated at Payerne using two reference methods: (1) manual detections of the CBL height performed by human experts using the ceilometer backscatter data; (2) values of CBL heights calculated using the Richardson's method from co-located radio sounding data. We found average biases as small as 27m (53 m) with respect to reference method 1 (method 2). Based on the excellent agreement between the two reference methods, PathfinderTURB has been applied to the ceilometer data at the mountainous site of the Kleine Scheidegg for the period September 2014 to November 2015. At this site, the CHM15k is operated in a tilted configuration at 71 degrees zenith angle to probe the atmosphere next to the Sphinx Observatory (3580ma.s.l.) on the Jungfraujoch (JFJ). The analysis of the retrieved layers led to the following results: the CAL reaches the JFJ 41% of the time in summer and 21% of the time in winter for a total of 97 days during the two seasons. The season-averaged daily cycles show that the CBL height reaches the JFJ only during short periods (4% of the time), but on 20 individual days in summer and never during winter. During summer in particular, the CBL and the CAL modify the air sampled in situ at JFJ, resulting in an unequivocal dependence of the measured absorption coefficient on the height of both layers. This highlights the relevance of retrieving the height of CAL and CBL automatically at the JFJ. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000408548000003 |
WOS关键词 | LIDAR BACKSCATTER PROFILES ; ENTRAINMENT ZONE THICKNESS ; FREE TROPOSPHERE ; HEIGHT ; CEILOMETER ; AIR ; RADIOSONDE ; CLIMATOLOGY ; RETRIEVAL ; TRANSPORT |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/24985 |
专题 | 地球科学 |
作者单位 | 1.MeteoSwiss, Fed Off Meteorol & Climatol, Payerne, Switzerland; 2.Swiss Fed Labs Mat Sci & Technol, Dubendorf, Switzerland; 3.ETH, Inst Atmospher & Climate Sci, Zurich, Switzerland |
推荐引用方式 GB/T 7714 | Poltera, Yann,Martucci, Giovanni,Coen, Martine Collaud,et al. PathfinderTURB: an automatic boundary layer algorithm. Development, validation and application to study the impact on in situ measurements at the Jungfraujoch[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(16). |
APA | Poltera, Yann.,Martucci, Giovanni.,Coen, Martine Collaud.,Hervo, Maxime.,Emmenegger, Lukas.,...&Haefele, Alexander.(2017).PathfinderTURB: an automatic boundary layer algorithm. Development, validation and application to study the impact on in situ measurements at the Jungfraujoch.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(16). |
MLA | Poltera, Yann,et al."PathfinderTURB: an automatic boundary layer algorithm. Development, validation and application to study the impact on in situ measurements at the Jungfraujoch".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.16(2017). |
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