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CROCUS Dual Polarization Ceilometer Data at Northeastern Illinois University Rooftop

Dataset ·
DOI:https://doi.org/10.15485/2510474· OSTI ID:2510474
 [1];  [2];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [3];
  1. Argonne National Laboratory
  2. Northeastern Illinois University
  3. Northwestern University
+ Show Author Affiliations

This dataset is from the Department of Energy Office of Science funded project, CROCUS Urban Integrated Field Laboratory (https://crocus-urban.org/). The dual-polarization ceilometer (Vaisala CL61) is an autonomous lidar system operating at 910 nm wavelength, providing valuable measurements for understanding atmospheric boundary layer evolution, air quality, and cloud-aerosol interactions. The CL61 measures the backscattered signal intensity alternating between parallel- and cross-polarization signals. The unique depolarization measurement capability improves discrimination between different particle types, such as liquid droplets, ice crystals, and aerosols. The depolarization is highly dependent on the scatterer shape and orientation (spherical vs non-spherical particles), with the linear depolarization ratio providing a measure of dominant backscatter signal component from atmospheric particles at various heights, essentially allowing discrimination between liquid and solid particles. With its efficient optical system, CL61’s improved signal-to-noise ratio compared to traditional ceilometers allows studying detailed vertical profiles of aerosols and clouds up to 15 km height.Datasets are stored in a netCDF data format, and we we encourage users to make use of the associated toolkits available from Unidata (https://www.unidata.ucar.edu/software/netcdf/), Project Pythia (https://foundations.projectpythia.org/core/data-formats/netcdf-cf.html), and our “Instrument Cookbooks” (https://crocus-urban.github.io/instrument-cookbooks) for more information on how to process the metadata-rich datasets.

Research Organization:
Community Research on Climate and Urban Science Urban Integrated Field Laboratory (CROCUS UIFL)
Sponsoring Organization:
U.S. DOE > Office of Science > Biological and Environmental Research (BER)
DOE Contract Number:
AC02-05CH11231
OSTI ID:
2510474
Country of Publication:
United States
Language:
English

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Related Subjects

54 ENVIRONMENTAL SCIENCES
Attenuated Volume Backscatter
EARTH SCIENCE > ATMOSPHERE > AEROSOLS
EARTH SCIENCE > ATMOSPHERE > AEROSOLS > AEROSOL BACKSCATTER
EARTH SCIENCE > ATMOSPHERE > AIR QUALITY
EARTH SCIENCE > ATMOSPHERE > CLOUDS
EARTH SCIENCE > ATMOSPHERE > CLOUDS > CLOUD PROPERTIES > CLOUD BASE HEIGHT
Total amount of cloud cover
Vertical Visibility
beta_att
cloud penetration depth
cloud thickness
cross-polarized component
detection of fog
ground reaching precipitation
height of different cloud layers
linear depolarisation ratio
number of the observed cloud layers
parallel-polarized component