Description: Atmospheric aerosol measurements were conducted at the Melpitz observatory, Germany. The data was collected during 2012 to 2016, measured by Droplet Measurement Technologies Cloud Condensation Nucleus Counter (DMT-CCNC).
Global identifier:
Doi(
"10.1594/PANGAEA.938213",
)
DataMeasurements(
DataMeasurements {
domain: Unspecified,
station: None,
measured_variables: [
"Aerosol number concentration",
"Cloud condensation nuclei",
"Condensation nuclei",
"Critical diameter",
"DATE/TIME",
"Hygroscopicity",
"Number",
"Parameter",
"Quotient",
"Supersaturation",
],
methods: [
"Cloud Condensation Nuclei Counter",
],
},
)
Comment: Columns #9-12 contain the fit parameters "D_c", "a", "b" and "sigma_s" of following sigmoid function, where "AF" means activated fraction of aerosol particles, "a" and "b" are the lower and upper limits of the sigmoid function, "D_c" is the critical diameter of dry particles, and "sigma_s" means the shape of the sigmoid function: AF = a + b / ( 1 + exp(-(D-D_c)/sigma_s) ) Column #15: The ratio "(D75-D25)/D50" represents the degree of external mixing of aerosol particles. The definations of D75, D50, D25, DX are the diameter (D) at which 75%, 50%, 25, X% of particles are activated at the given supersaturation condition. See Jurányi et al. (2013, doi:10.5194/acp-13-6431-2013) for details. Columns #16-61 contain the particle size distribution for 46 size bins. The mid-diameter of each bin (i.e. the geometric mean of the bin interval) is given in the Parameter Comment.
Origins: /Wissenschaft/PANGAEA
Tags: Atmosphärisches Aerosol ? Deutschland ? Aerosol ? Messtechnik ? Daten ? Aerosol chemistry ? Cloud Concensation Nuclei ? Particle Number Size Distribution (PNSD) ?
Bounding boxes: 12.93° .. 12.93° x 51.53° .. 51.53°
License: cc-by/4.0
Language: Englisch/English
Issued: 2021-11-15
Modified: 2021-11-16
Time ranges: 2012-08-17 - 2016-10-20
Accessed 1 times.