[Dataset Title] Bulk microphysical parameters from NRC Convair580 flights collected during the ICICLE project out of Rockford Illinois [Dataset Author(s)] Data quality and processing. Lead: Alexei Korolev, Environment and Climate Change Canada alexei.korolev@canada.ca Ivan Heckman, Environment and Climate Change Canada ivan.heckman@canada.ca Igor Grishin, Environment and Climate Change Canada igor.grishin @canada.ca [Custodianship] ECCC Nevzorov probe: Environment and Climate Change Canada ECCC Cloud Extinction Probe (CEP): Environment and Climate Change Canada ECCC FSSP: Environment and Climate Change Canada ECCC CDP: Environment and Climate Change Canada NRC FCDP: National Research Council ECCC 2DS: Environment and Climate Change Canada NRC 2DS: National Research Council ECCC OAP-2DC: Environment and Climate Change Canada ECCC HVPS: Environment and Climate Change Canada NRC Rosemount Icing Detector #1 (RID1): National Research Council NRC Rosemount Icing Detector #2 (RID2): National Research Council ECCC Rosemount Icing Detector #3 (RID3): Environment and Climate Change Canada NRC M300: National Research Council (data acquisition system) NRC PADS: National Research Council (data acquisition system) [Acknowledgements] ECCC Nevzorov probe, CEP, FSSP, CDP, OAP-2DC, 2DS, HVPS, RID3 were maintained, operated, monitored for data quality and data collection by Mike Harwood (ECCC), Jason Iwachow (ECCC) and Alexei Korolev (ECCC) NRC FCDP and 2DS data collection was performed by Leonid Nichman (NRC) and Mengistu Wolde (NRC) NRC RID1 and RID2 data collection was performed by Mengistu Wolde (NRC) and Matthew Bastian (NRC) [Calibrations] ECCC CDP Jason Iwachow (ECCC) ECCC FSSP Jason Iwachow (ECCC) NRC FCDP Leonid Nichman (NRC) [Funding] The ICICLE project was funded by the Federal Aviation Administration (FAA). Principal Investigator Stephanie DiVito. [Time of Interest] 2019-01-28 20:08:36 - 2019-03-07 21:06:54 UTC [Area of Interest] 39.3290 to 43.3550 N -91.9840 to -84.5950 E [Data Frequency] 1 second [Data Spatial Type] Point [General Dataset Description] ICICLE data processing comments: Time Synchronization Time on instruments was synchronized to the m300 clock. Comp_Conc_Ice Composite ice particle concentration was calculated from a composite ice PSD as a sum of concentrations in all included size bins. Comp_Conc_Liq Composite liquid particle concentration was calculated from a composite liquid PSD as a sum of concentrations in all included size bins. Comp_LWC LWC was assessed from the liquid composite PSD as LWC=rho*pi/6*SUM(N(i)D(i)^3) where rho is the liquid water mass density;N(i) and D(i) are the number concentration and middle point of the i-th composite liquid PSD size bin. Comp_IWC IWC was assessed from the ice composite PSD as LWC=alpha*pi/6*SUM(N(i)D(i)^beta) with constants of alpha=8.4870e-11;beta=1.9; N(i) and D(i) are the number concentration and middle point of the i-th composite ice PSD size bin. Comp_D999_Ice_dmx 99.9th percentile of size assessed from the Dmax ice composite distribution. Comp_D999_Ice_deq 99.9th percentile of size assessed from the Deq ice composite distribution. Comp_D999_Liq 99.9th percentile of size assessed from the liquid composite distribution. Percentile is calculated starting at 2DS bins, when there is no 2DS data, Dmax of Forward scattering probes is used. 99.9% percentile of concentration always occurs in the first forward scattering bins in liquid clouds Comp_MVD_Ice_dmx Mean volume diameter Comp_MVD_dmx was calculated from the Dmax ice composite PSD as MVD=(SUM(N(i)D(i)^3)/ SUM(N(i)))^1/3,where N(i) and D(i) are the number concentration and middle point of the i-th composite PSD size bin, and particles are measured by their maximal diameter. Comp_MVD_Ice_deq Mean volume diameter Comp_MVD_Ice_deq was calculated from the deq ice composite PSD as MVD=(SUM(N(i)D(i)^3)/ SUM(N(i)))^1/3,where N(i) and D(i) are the number concentration and middle point of the i-th composite PSD size bin, and particles are measured by their area equivalent diameter. Comp_MVD_Liq Mean volume diameter Comp_MVD_Liq was calculated from the liquid composite PSD as MVD=(SUM(N(i)D(i)^3)/ SUM(N(i)))^1/3,where N(i) and D(i) are the number concentration and middle point of the i-th composite PSD size bin. Comp_MMD_Ice_dmx Median Mass Diameter was calculated from the Dmax ice composite PSD by calculating a mass distribution similarly to IWC and taking the median size. Comp_MMD_Ice_deq Median Mass Diameter was calculated from the Deq ice composite PSD by calculating a mass distribution similarly to IWC and taking the median size. Comp_MMD_Liq Median Mass Diameter was calculated from the liquid composite PSD by calculating a mass distribution similarly to LWC and taking the median size. Comp_Reflectivity_Liq Reflectivity was assed from the liquid composite PSD using the formula Z=36e3*(sum((N(i) (1e3 a D(i)^b)^2)/(Dfl pi^2)), with alpha=5.2360e-13; beta=3; Dfl=1; N(i) and D(i) are the number concentration and middle point of the i-th composite ice PSD size bin. Comp_Reflectivity_Ice Reflectivity was assed from the liquid composite PSD using the formula Z=36e3*(sum((N(i) (1e3 a D(i)^b)^2)/(Dfi pi^2)), with alpha=8.4870e-11; beta=1.9; Dfi=4.7; N(i) and D(i) are the number concentration and middle point of the i-th composite ice PSD size bin. RID1 NRC Rosemount Icing Detector #1 (RID1) was mounted on the lower surface of the wing on the port side. The output signal was scaled the way to be consistent with two other RIDs. The RID1 has a coarse resolution: 16 positions between min and max values of the output signal. In order to smooth the RID1 output signal, a 5-sec averaging was applied. In the present processing, the increasing RID1 signal corresponds to the presence of liquid water, whereas in the case of flat or decreasing signal liquid water is absent or below the detectable RID1 sensitivity threshold. The RID signal will be also flat when the total temperature is above 0C (static Ts~-4C) and LWC is higher Ludlam limit. RID2 NRC Rosemount Icing Detector #2 (RID2) was mounted on the underwing scalar boom on the starboard side. The output signal was scaled the way to be consistent with two other RIDs. 3-sec averaging was applied to the RID2 measurements to smoothen its coarse resolution. In the present processing, the increasing RID1 signal corresponds to the presence of liquid water, whereas in the case of flat or decreasing signal liquid water is absent or below the detectable RID2 sensitivity threshold. The RID signal will be also flat when the total temperature is above 0C (static Ts~-4C) and LWC is higher Ludlam limit. RID3 ECCC Rosemount Icing Detector #3 (RID3) was mounted on the front dome of the CDP, which was located on the particle probes pylon on the starboard side. No averaging or scaling was applied to the RID3 measurements. In the present processing, the increasing RID1 signal corresponds to the presence of liquid water, whereas in the case of flat or decreasing signal liquid water is absent or below the detectable RID3 sensitivity threshold. The RID signal will be also flat when the total temperature is above 0C (static Ts~-4C) and LWC is higher Ludlam limit. RID_LWC RID_LWC is a composite liquid water content deduced from the measurements of RID1, RID2, and RID3. Each RID was calibrated against LWC measured by hot-wire and/or scattering probes. The dead time related to the RIDs de-icing cycle and to the periods of cooling down of the RIDs surface to the ambient temperatures was excluded from the LWC-RID data. LWC-RID may have gaps due to the dead time, even though supercooled LWC was present. LWC-RID will also be equal or close to zero in the presence of LWC when (a) total temperature >0C (static temperature >~-4C), (b) LWC is above the Ludlam limit. Overall, LWC-RID has low accuracy, and it should not be used for quantification of LWC in clouds. However, it is good for the assessment of the presence of supercooled liquid water. CEP_Ext ECCC Cloud Extinction Probe was designed for airborne measurements of the extinction coefficient of clouds based on the Beer-Bouguer law (Korolev et al. JTECH, 2014, v31, pp.326-345). The CEP is expected to measure the extinction coefficient in the range 0.5-200km-1. The CEP consists of the emitter-receiver unit (optical unit) and a retroreflector. The light source is a superbright LED with wavelength 635nm+/-5nm. The CEP optical unit was located inside a rear side of the wing-tip canister on the port-side. The retroreflector was mounted inside the rear side of the lower outer PMS canister located on the particle probes pylon. The distance between the optical unit and the retroreflector was 2.35m. During the CEP data processing, the transmitted signal was normalized on the intensity of the light source and the background light intensity was subtracted. The zero offsets during ascend and descend were removed. Nevzorov_LWC1 LWC calculated from the ECCC Nevzorov hot-wire LWC and TWC1 sensors. Corrections on collection efficiency and residual effect of ice have been applied in this version. Nevzorov_LWC2 LWC calculated from the ECCC Nevzorov hot-wire LWC and TWC2 sensors. Corrections on collection efficiency and residual effect of ice have been applied in this version. Nevzorov_IWC1 IWC calculated from the ECCC Nevzorov hot-wire LWC calculated from the TWC1 sensor. Corrections on collection efficiency and residual effect of ice have been applied in this version. Nevzorov_IWC2 IWC calculated from the ECCC Nevzorov hot-wire LWC calculated from the TWC2 sensor. Corrections on collection efficiency and residual effect of ice have been applied in this version. 2DC_FracSphere The fraction of spherical particles in the ensemble of cloud particles >200um measured by OAP-2DC assessed from the image recognition analysis (Korolev and Sussman, JTECH, 2000, v17, pp. 1048-1057). 2DC_FracIrregular The fraction of irregular shaped ice in the ensemble of cloud particles >200um measured by OAP-2DC assessed from the image recognition analysis (Korolev and Sussman, JTECH, 2000, v17, pp. 1048-1057). 2DC_FracNeedle The fraction of needle shaped ice in the ensemble of cloud particles >200um measured by OAP-2DC assessed from the image recognition analysis (Korolev and Sussman, JTECH, 2000, v17, pp. 1048-1057). 2DC_FracDendrite The fraction of dendrite shaped ice in the ensemble of cloud particles >200um measured by OAP-2DC assessed from the image recognition analysis (Korolev and Sussman, JTECH, 2000, v17, pp. 1048-1057). HVPS_FracSphere The fraction of spherical particles in the ensemble of cloud particles >600um measured by HVPS assessed from the image recognition analysis (Korolev and Sussman, JTECH, 2000, v17, pp. 1048-1057). HVPS_FracIrregular The fraction of irregular shaped ice in the ensemble of cloud particles >600um measured by HVPS assessed from the image recognition analysis (Korolev and Sussman, JTECH, 2000, v17, pp. 1048-1057). HVPS_FracNeedle The fraction of needle shaped ice in the ensemble of cloud particles >600um measured by HVPS assessed from the image recognition analysis (Korolev and Sussman, JTECH, 2000, v17, pp. 1048-1057). HVPS_FracDendrite The fraction of dendrite shaped ice in the ensemble of cloud particles >600um measured by HVPS assessed from the image recognition analysis (Korolev and Sussman, JTECH, 2000, v17, pp. 1048-1057). TAS Values included here as reference only, for processing details see the ICICLE data set: NRC Convair 580 Aircraft State Parameters [Wolde, Mengistu/NRC Canada] P Values included here as reference only, for processing details see the ICICLE data set: NRC Convair 580 Aircraft State Parameters [Wolde, Mengistu/NRC Canada] Ts Values included here as reference only, for processing details see the ICICLE data set: NRC Convair 580 Aircraft State Parameters [Wolde, Mengistu/NRC Canada] Latitude Values included here as reference only, for processing details see the ICICLE data set: NRC Convair 580 Aircraft State Parameters [Wolde, Mengistu/NRC Canada] Longitude Values included here as reference only, for processing details see the ICICLE data set: NRC Convair 580 Aircraft State Parameters [Wolde, Mengistu/NRC Canada] ManualPhase Subjective Manual Phase Classification. 0:no classification or clear sky; 1:All liquid; 1.2: Liquid with some ice (sparce ice embedded in liquid clouds, low ice number concentration, minor ice contribution in TWC compared to LWC); 2: Mixed phase (usually small cloud droplets and ice particles); 2.8: Ice with some liquid (ice cloud with embedded spatially sparce drizzle/rain, low concentration of liquid drops, minor liquid contribution in TWC compared to IWC); 3: All ice This is a subjective assessment of the cloud environment state targeting identification of the presence rain in drizzle. ManualPhase parameter is based on the visual assessment of cloud particle imagery (primarily 2DS and CPI) and analysis of complementary measurements from a suite of cloud microphysical instruments (forward scattering probes, RID, CEP, hot-wire, temperature). ManualPhase parameter includes a significant component of subjective judgment, and it should not be taken as an ultimate truth. Processing Software: FCDP processing: SPEC FCDP_SP3C_V40_FCDP_SN09 Pressure, Temperature, Latitude, Longitude, Airspeed: NRC FRL data products, values included here as reference only, for processing details see the ICICLE data set: NRC Convair 580 Aircraft State Parameters [Wolde, Mengistu/NRC Canada] https://data.eol.ucar.edu/dataset/570.008 Other variables: ECCC D2G [File Names] ICICLE_BulkParameters.zip Includes: ICICLE_BulkParameters_FXX.nc netcdf4_classic format [Data restrictions] Restricted Password requested Preliminary data restricted to ICICLE participants [Digital Object Identifier (DOI)] no DOI [GCMD Keywords] EARTH SCIENCE ATMOSPHERE CLOUDS CLOUD MICROPHYSICS CLOUD LIQUID WATER/ICE 05ac9d3e-bc44-41fa-ace0-c41bf3ebee97