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Multiwavelength aerosol lidars at Maïdo Observatory

Since 2012, 3 lidars from the Atmospheric Physics Observatory of La Réunion (OPAR) have been performing aerosol profile measurements at the Maïdo observatory site, located at 2160 meters to the west of the island of La Réunion. These profiles are obtained at several wavelengths, 355nm and 532nm, and there are also depolarized channels at 532nm.

The data from these 3 lidars are processed in two stages: initially, the data are manually cleaned of disturbed profiles, either by atmospheric effects, such as the passage of clouds, or by electronic effects like noise. They are then summed over the night. This is the L1b level, and the data are available in the Matlab format (.mat). Subsequently, the data are processed to convert from a profile of received photon number to a profile of aerosol extinction and scattering. The methodology used is based on the Klett calculation at one wavelength. This is the L2b level, and the data are available in the NetCDF format (.nc) with the NDACC convention in the choice of variable names. Therefore, the data are distributed across 6 directories, 2 levels of processing for each lidar.

The raw data from the instrument (called L0) are in a proprietary format, the Licel format, and are not accessible in open access, only via FTP with restricted access.

Simple

Date (Creation)
2024-03-26T13:00:00
Edition
http://localhost:8080/demodem/editioin
Status
On going
Originator
  LACy - Dominique Gantois ( )
Author
  LACy - Michaël Sicard
Processor
  OSU-Réunion - Guillaume Payen
Maintenance and update frequency
Irregular
Theme
  • Lidars, aerosols, maido observatory, atmosphere, climat,
Place
  • World
GEMET - INSPIRE themes, version 1.0
  • Atmospheric conditions
  • Environmental monitoring facilities
Access constraints
License
Use constraints
License
Other constraints
CC BY 4
Spatial representation type
Vector
Denominator
1
Metadata language
English
Character set
UTF8
Topic category
  • Climatology, meteorology, atmosphere
Begin date
2012-01-01
End date
2024-03-01
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Supplemental Information
night-time averaged profiles were manually screened to provide cloud-free and artifact-free profiles. Data processing consisted in Klett inversion to retrieve aerosol optical products from preprocessed files.
Reference system identifier
WGS 1984
Distribution format
  • mat ( Matlab format (.mat) )

  • nc ( NetCDF format following NDACC guidelines )

OnLine resource
Li1200 - L0 - FTP OSU-R ( WWW:DOWNLOAD-1.0-ftp--download )

Raw data of the lidar Li1200, in Licel format. Restricted access

OnLine resource
LiO3S - L0 - FTP OSU-R ( WWW:DOWNLOAD-1.0-ftp--download )

Raw data of the lidar LiO3S, in Licel format. Restricted access

OnLine resource
LiO3T - L0 - FTP OSU-R ( WWW:DOWNLOAD-1.0-ftp--download )

Raw data of the lidar LiO3T, in Licel format. Restricted access

OnLine resource
LiO3T - L1b - Open Access ( WWW:DOWNLOAD-1.0-http--download )
OnLine resource
LiO3T - L2b - Open Access ( WWW:DOWNLOAD-1.0-http--download )
OnLine resource
LiO3S - L2b - Open Access ( WWW:DOWNLOAD-1.0-http--download )
OnLine resource
LiO3S - L1b - Open Access ( WWW:DOWNLOAD-1.0-http--download )
OnLine resource
Li1200 - L1b - Open Access ( WWW:DOWNLOAD-1.0-http--download )
OnLine resource
Li1200 - L2b - Open Access ( WWW:DOWNLOAD-1.0-http--download )
OnLine resource
DOI of the data ( DOI )
Hierarchy level
Non geographic dataset
File identifier
8177eec2-786e-4a18-97c1-4d7393f735be XML
Metadata language
English
Character set
UTF8
Date stamp
2024-03-27T13:20:54
Metadata standard name
ISO 19115:2003/19139
Metadata standard version
1.0
Point of contact
  OSU-Réunion - Guillaume Payen ( )
 
 

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Keywords

Lidars, aerosols, maido observatory, atmosphere, climat,
GEMET - INSPIRE themes, version 1.0
Atmospheric conditions Environmental monitoring facilities

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