Gabriel Pereira Freitas, Radovan Krejci, Dominic Heslin-Rees, Ben Kopec, Alun Hubbard, Jeffrey M. Welker, Paul Zieger
Using an optical single-particle instrument we measured the particle concentration of coarse-mode aerosol (optical diameters larger than 0.8 µm) within cloud residuals at the Zeppelin Observatory, Svalbard, from June 2019 to January 2021.
The data set provides insights on the relationship between fluorescent primary biological aerosol particles (PBAP) and ice or cloud nucleating particles (CCN/INP) in low-level Arctic clouds and their possible impact on the cloud phase.
Using ultra-violet laser-induced fluorescence, we categorized these particles into non-fluorescent, fluorescent, highly-fluorescent and fluorescent primary biological aerosol particles (PBAP). PBAP account for particles such as bacteria, fungal spores or other plant debris.
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Citation
Gabriel Pereira Freitas, Radovan Krejci, Dominic Heslin-Rees, Ben Kopec, Alun Hubbard, Jeffrey M. Welker, Paul Zieger (2024) Fluorescent primary biological aerosol particle concentrations in low-level Arctic cloud residuals in Svalbard 2019 – 2021. Dataset version 1. Bolin Centre Database. https://doi.org/10.17043/zeppelin-freitas-2023-bioclouds-1
References
Pereira Freitas, G., Kopec, B., Adachi, K., Krejci, R., Heslin-Rees, D., Yttri, K. E., Hubbard, A., Welker, J. M., and Zieger, P. (2023). Contribution of fluorescent primary biological aerosol particles to low-level Arctic cloud residuals, EGUsphere [preprint], https://doi.org/10.5194/egusphere-2023-2600 , 2023.
Data description
The data consists of one .csv file zeppelin-freitas-2023-bioclouds-1.csv containing all the resampled data per cloud event. Each cloud event is identified by the index column (column 0) and by their mid time point (between start and end). Each column represents one averaged parameter for the cloud event.
Parameters:
C : cloud residual coarse mode concentration. As measured by the Multiparameter Bioaerosol Spectrometer (MBS), in particles per litre.
P : cloud residual primary biological aerosol particle concentration. As measured by the MBS, in particles per litre.
H: cloud residual highly fluorescent particle concentration. As measured by the MBS, in particles per litre.
R: ratio between P and C.
T: ambient temperature at 475 meters above sea level. Measured at the Zeppelin Observatory, in °C.
W: wind speed at the Zeppelin Observatory, in m/s.
d : water vapor deuterium excess values. As measured by a Picarro system, in per mille ‰.
dstd: standard deviation of d.
PN: counts of cloud residual primary biological aerosol particles. As measured by the MBS, in number of particles.
PC: counts of cloud residual coarse mode aerosol particles. As measured by the MBS, in number of particles.
IN: counts of cloud residual primary biological aerosol particles of type I. As measured by the MBS, in number of particles.
IIN: counts of cloud residual primary biological aerosol particles of type II. As measured by the MBS, in number of particles.
IIIN: counts of cloud residual primary biological aerosol particles of type III. As measured by the MBS, in number of particles.
IV: counts of cloud residual primary biological aerosol particles of type IV. As measured by the MBS, in number of particles.
V: counts of cloud residual primary biological aerosol particles of type V. As measured by the MBS, in number of particles.
Si: mean size of primary biological aerosol particles. As determined by the MBS, in μm.
Sc: mean asymmetry value of primary biological aerosol particles. As determined by the MBS.
Pm: mean peak-to-mean value of primary biological aerosol particles. As determined by the MBS.
I: cloud residual primary biological aerosol particle of type I concentration. As measured by the MBS, in particles per litre.
II : cloud residual primary biological aerosol particle of type II concentration. As measured by the MBS, in particles per litre.
III : cloud residual primary biological aerosol particle of type III concentration. As measured by the MBS, in particles per litre.
IV : cloud residual primary biological aerosol particle of type IV concentration. As measured by the MBS, in particles per litre.
V : cloud residual primary biological aerosol particle of type V concentration. As measured by the MBS, in particles per litre.
S : start time of cloud event.
E : end time of cloud event.
D : duration of cloud event.
M: month of cloud event, as number of the month.
SEASON: whether the cloud event is broadly classified as a winter or summer event. (s - summer, w-winter)
ITD: ice-to-droplet ratio of the cloud event.
HatT: column altitude in which ambient temperature reaches -15 °C, in metres.
CTH: cloud top height, in metres.
fidas: ambient coarse mode concentration. As measured by the Fidas 200S system, in particles per litre.
Comments
Please cite and consult Freitas et al. (2023) when using the data. Once Freitas et al. (2023) is accepted, please consult and cite the final version.