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CATEGORIES:subgroup meetings
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DESCRIPTION;ALTREP="CID:<FFFF__=0ABBE548DFE235B58f9e8a93d@coffeebean.com>":
 The attenuated backscatter profiles recorded by the Ott/Lufft CHM15k are a
 ffected by an incomplete optical overlap in the lowest few hundred metres.
  Studies have shown that correction solely based on the overlap function p
 rovided by the manufacturer may not always be sufficient to obtain high-qu
 ality data. Accounting for the temperature dependence of the optical overl
 ap function using the method developed by Hervo et al. (2016) has been sho
 wn to significantly improve the observed profile of attenuated backscatter
 . As a consequence\, it is suggested that advanced products that are based
  on the backscatter profiles\, such as aerosol characteristics or atmosphe
 ric boundary layer heights should utilise data corrected with the dynamic 
 overlap model\, rather than the static approach (Kotthaus et al.\, 2020\; 
 Poltera et al.\, 2017).\nIn this special working group meeting we are goin
 g to identify the necessary steps required to reach fully-automated creati
 on of the temperature-dependant optical overlap model for Lufft CHM15k obs
 ervations.\nThe SWG is motivated by high demand for high-quality attenuate
 d backscatter profiles and associated advanced products across diverse sen
 sor networks such as ACTRIS and E-PROFILE.\nALL MEETING INFORMATION CAN BE
  FOUND IN THE ATTACHMENT\nReferences\nHervo\, M.\, Poltera\, Y.\, Haefele\
 , A.\, 2016. An empirical method to correct for temperature-dependent vari
 ations in the overlap function of CHM15k ceilometers. Atmos. Meas. Tech. 9
 \, 2947–2959. doi:10.5194/amt-9-2947-2016\nKotthaus\, S.\, Haeffelin\, M.\
 , Drouin\, M.-A.\, Dupont\, J.-C.\, Grimmond\, S.\, Haefele\, A.\, Hervo\,
  M.\, Poltera\, Y.\, Wiegner\, M.\, 2020. Tailored Algorithms for the Dete
 ction of the Atmospheric Boundary Layer Height from Common Automatic Lidar
 s and Ceilometers (ALC). Remote Sens. 12\, 3259. doi:10.3390/rs12193259\nP
 oltera\, Y.\, Martucci\, G.\, Collaud Coen\, M.\, Hervo\, M.\, Emmenegger\
 , L.\, Henne\, S.\, Brunner\, D.\, Haefele\, A.\, 2017. PathfinderTURB: an
  automatic boundary layer algorithm. Development\, validation and applicat
 ion to study the impact on in situ measurements at the Jungfraujoch. Atmos
 . Chem. Phys. 17\, 10051–10070. doi:10.5194/acp-17-10051-2017
DTSTART:20211213T140000Z
DTEND:20211213T153000Z
GEO:00;0
LOCATION:online
ORGANIZER:
SEQUENCE:1
SUMMARY:WG3/4 ALC subgroup: optical overlap of the Lufft CHM15k
TRANSP:OPAQUE
URL:https://probe-cost.eu/activities/our-events/16-wg3-4-alc-subgroup-optic
 al-overlap-of-the-lufft-chm15k.html
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