ATom: Development of Cloud Indicator Algorithm Using Airborne Observations from CAPS

Description

This dataset is the basis for the development of the Cloud Indicator, a novel algorithm that automatically detects and classifies measurement periods inside clouds. The included data were used in the analysis and development of figures for the related publication. The Cloud Indicator algorithm was developed based on particle size distribution measurements from a second-generation Cloud, Aerosol, and Precipitation Spectrometer (CAPS) combined with measurements of relative humidity and temperature from other sensors, to automatically detect flight sequences in clouds and classify the cloud type. Measurements were collected on 2016-08-20 as part of the Atmospheric Tomography Mission (ATom-1) Campaign and on 2017-04-20 as part of the Absorbing aerosol layers in a changing climate: aging, LIFEtime and dynamics (A-LIFE) project. As an additional criterion for the Cloud Indicator, a cloud-aerosol volume factor was established to ensure a precise and robust distinction between clouds and aerosol layers such as mineral dust or biomass burning to reduce misclassifications. Data are provided in netCDF (*.nc) format.

Resources

Name Format Description Link
33 ATom: Development of Cloud Indicator Algorithm Using Airborne Observations from CAPS: ATom_Clouds_Aerosols.pdf https://data.ornldaac.earthdata.nasa.gov/public/atom/ATom_Clouds_Aerosols/comp/ATom_Clouds_Aerosols.pdf
22 Time series of a) relative humidity over ice and water, b) altitude, temperature, and Cloud Indicator classification, c) cloud-aerosol volume factor (fCA), and d) particle size distribution in the size range 0.6 to 25 um (CAS data) and 25 to 930 um (CIP data) for the ATom-1 flight on August 20, 2016. For the three red-marked boxes, CIP shadow images of the detected particles are shown. Figure from Dollner et al. (2024). https://daac.ornl.gov/ATOM/guides/ATom_Clouds_Aerosols_Fig1.jpg
21 Search results for publications that cite this dataset by its DOI. https://scholar.google.com/scholar?q=10.3334%2FORNLDAAC%2F2250
21 Data set Landing Page DOI URL https://doi.org/10.3334/ORNLDAAC/2250
21 USE SERVICE API https://opendap.earthdata.nasa.gov/
21 ATom campaign page https://daac.ornl.gov/ATOM/campaign/
21 ORNL DAAC Data Set Documentation https://daac.ornl.gov/ATOM/guides/ATom_Clouds_Aerosols.html
57 Collection bundle https://data.ornldaac.earthdata.nasa.gov/protected/bundle/ATom_Clouds_Aerosols_2250.zip
21 This link allows direct data access via Earthdata login https://daac.ornl.gov/daacdata/atom/ATom_Clouds_Aerosols/data/
57 Collection bundle https://data.ornldaac.earthdata.nasa.gov/protected/bundle/ATom_Clouds_Aerosols_2250.zip

Tags

  • climate-indicators
  • atmospheric-ocean-indicators
  • earth-science

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