10.3334/ORNLDAAC/1981
Weinzierl, B.B.
B.B.
Weinzierl
Dollner, M.
M.
Dollner
ATom: Cloud and Coarse Aerosol Measurements from CAPS Instrument, 2016-2018
Atmospheric Tomography Mission (ATom)
ORNL Distributed Active Archive Center
2022
ATMOSPHERE, AEROSOLS, AEROSOL PARTICLE PROPERTIES, AEROSOL SIZE DISTRIBUTION
CLIMATE INDICATORS, ATMOSPHERIC/OCEAN INDICATORS, CLOUD INDICATORS,
ATMOSPHERE, CLOUDS, CLOUD TYPES,
ATMOSPHERE, AEROSOLS, AEROSOL PARTICLE PROPERTIES, AEROSOL CONCENTRATION
NASA DC-8, CAPS
Cloud Aerosol and Precipitation Spectrometer
atmospheric chemistry
aerosol concentration
cloud indicator
cloud type
ORNL DAAC
0000-00-00
0000-00-00
2016-07-29/2018-05-21
en
https://daac.ornl.gov/cgi-bin/dataset_lister.pl?p=39
Data Files
0 MB
ICARTT
This dataset contains cloud type and coarse aerosol contents measured by the University of Vienna's second-generation Cloud Aerosol and Precipitation Spectrometer (CAPS) instrument mounted to the NASA DC-8 aircraft during the four ATom campaigns that occurred from 2016 to 2018. CAPS measures particle size distributions in a size range between nominally 0.5 micrometers and 960 micrometers. The sizes range between approximately 0.5 and 50 micrometers is covered by the optical particle counter component of CAPS-the Cloud and Aerosol Spectrometer with Depolarization Detection (CAS-DPOL). The sizes range from 15 to 930 micrometers is measured with the optical array probe called Cloud imaging Probe (CIP). Cloud types are determined using an algorithm developed to detect and classify clouds using measurements of CAPS. Relative humidity and temperature are considered by the algorithm. The cloud indicator provides a classification on a 1 Hz basis and separates data in cloud-free, aerosol-cloud transition regime (ACTR), liquid clouds, clouds in the mixed-phase temperature regime (MPTR), and cirrus clouds. The coarse aerosol product provides cloud and aerosol particle number concentrations at standard pressure (1013.25 hPa) and standard temperature (273.15 K) in selected size ranges. Particle sizes refer to ammonium sulfate optical equivalent diameter (m=1.52 + 0.0i).
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