DOI: 10.5281/zenodo.7907497
title: Particle size and velocity distributions from an OTT Parsivel optical disdrometer located at Mario Zucchelli Station, aggregated to 5min, monthly netCDF archive

description: Disdrometric data from an OTT Parsivel with 32 size classes and 32 velocity classes located at Mario Zucchelli Station (Antarctica, -74.6945 N, 164.1152 E, 15 m a.s.l.). Mid values and widths of the classes are provided. Spectra are sampled every 5 minutes (after merging five 1-minute measurements) and saved in monthly netCDF files. Note that this data has been processed regardless of precipitation type. Particle Size distribution (PSD) is calculated for every data entry. Monthly cumulated spectra and PSD are also provided. Metadata available at https://antarcticdatacenter.cnr.it/geonetwork/srv/api/records/ed6ea5bf-3f59-467b-9914-f4db387bb55d Example of netCDF file structure: <strong>Source</strong>: output/DIS/dis_202202.nc <strong>Format</strong>: netcdf4_classic <strong>Global Attributes:</strong> <em>title </em>= 'OTT Parsivel disdrometer data, aggregated to 5min, monthly netCDF archive.' <em>comment </em>= 'Particle counts diveded in 32 size classes and 32 velocity classes. Note that this data has been processed regardless of precipitation type.' <em>time_label </em>= 'Feb 2022' <em>institution </em>= 'CNR-ISAC, Rome (IT)' <em>contact_person </em>= 'Baldini Luca, CNR-ISAC, Rome, l.baldini@isac.cnr.it' <em>source </em>= 'OTT Parsivel disdrometer at MZS (Antarctica)' <em>location </em>= 'Mario Zucchelli Station (74°42'S, 164°07'E, 15 m a.s.l.)' <em>author </em>= 'Roversi Giacomo' <em>creation_date </em>= '05-May-2023 10:46:02 UTC' <em>coverage </em>= 'Monthly coverage (Feb 2022): 100 %' <em>time_resolution </em>= '5 minutes' <em>history </em>= 'Created from raw OTT telegram, aggregated to 5min temporal resolution with a sum of the 1-minute counts if least 3 out of 5 are not NaN.' <strong>Dimensions</strong>: <em>time </em>= 8058 (UNLIMITED) <em>diameter </em>= 32 <em>velocity </em>= 32 <strong>Variables</strong>: <strong>time_UTC </strong> <em>Size</em>: 8058x1 <em>Dimensions</em>: time <em>Datatype</em>: int32 <strong><em>Attributes</em></strong>: <em>description </em>= 'Measurement time. Timestamp indicates the end of the observation interval, e.g. 01-Mar-2020 00:05:00 represents the particle counts registered between 01-Mar-2020 00:00:01 and 01-Mar-2020 00:05:00.' <em>time_zone </em>= 'UTC' <em>units = 'Seconds since 1970-01-01 00:00:00 (Unix time).'</em> <strong>diameters </strong> <em>Size</em>: 32x1 <em>Dimensions</em>: diameter <em>Datatype</em>: single <strong><em>Attributes</em></strong>: <em>description </em>= 'Mid values of the size classes' <em>units </em>= 'mm' <strong>velocities </strong> <em>Size</em>: 32x1 <em>Dimensions</em>: velocity <em>Datatype</em>: single <strong><em>Attributes</em></strong>: <em>description </em>= 'Mid values of the velocity classes' <em>units </em>= 'm s^-1' <strong>diameters_width </strong> <em>Size</em>: 32x1 <em>Dimensions</em>: diameter <em>Datatype</em>: single <strong><em>Attributes</em></strong>: <em>description </em>= 'Width of the size classes' <em>units </em>= 'mm' <strong>velocities_width</strong> <em>Size</em>: 32x1 <em>Dimensions</em>: velocity <em>Datatype</em>: single <strong><em>Attributes</em></strong>: <em>description </em>= 'Width of the velocity classes' <em>units </em>= 'm s^-1' <strong>spectrum </strong> <em>Size</em>: 32x32x8058 <em>Dimensions</em>: diameter,velocity,time <em>Datatype</em>: int32 <strong><em>Attributes</em></strong>: <em>description </em>= 'Matrix of particle counts in each of the 32 diameter sizes and 32 velocity ranges over 5 minutes.' <em>units </em>= 'counts' <strong>PSD </strong> <em>Size</em>: 32x8058 <em>Dimensions</em>: diameter,time <em>Datatype</em>: single <strong><em>Attributes</em></strong>: <em>description </em>= 'Particle size distribution, 5 minutes interval, normalized by the observed volume.' <em>units </em>= 'm^-3 mm^-1' <strong>monthlySpectrum </strong> <em>Size</em>: 32x32 <em>Dimensions</em>: diameter,velocity <em>Datatype</em>: double <strong><em>Attributes</em></strong>: <em>description </em>= 'Matrix of particle counts in each of the 32 diameter sizes and 32 velocity ranges over the entire month.' <em>units </em>= 'counts' <strong>monthlyPSD </strong> <em>Size</em>: 32x1 <em>Dimensions</em>: diameter <em>Datatype</em>: double <strong><em>Attributes</em></strong>: <em>description </em>= 'Particle size distribution for the whole month, normalized by the observed volume.' <em>units </em>= 'm^-3 mm^-1'
description: Months with data (% of coverage): Nov 2016 (56%), Dec 2016 (87%), Jan 2017 (36%), Feb 2017 (32%), Nov 2017 (70%), Dec 2017 (100%), Jan 2018 (100%), Feb 2018 (100%), Mar 2018 (100%), Apr 2018 (100%), May 2018 (100%), Jun 2018 (100%), Jul 2018 (100%), Aug 2018 (100%), Sep 2018 (100%), Oct 2018 (100%), Nov 2018 (100%), Dec 2018 (100%), Jan 2019 (100%), Feb 2019 (100%), Mar 2019 (100%), Apr 2019 (100%), May 2019 (100%), Jun 2019 (100%), Jul 2019 (100%), Aug 2019 (100%), Sep 2019 (60%), Oct 2019 (16%), Nov 2019 (100%), Dec 2019 (100%), Jan 2020 (100%), Feb 2020 (100%), Mar 2020 (10%), Nov 2020 (57%), Dec 2020 (97%), Jan 2021 (100%), Feb 2021 (68%), Oct 2021 ( 3%), Nov 2021 (100%), Dec 2021 (100%), Jan 2022 (100%), Feb 2022 (100%), Mar 2022 (100%), Apr 2022 (100%), May 2022 (100%), Jun 2022 (100%), Jul 2022 (100%), Aug 2022 (100%), Sep 2022 (100%), Oct 2022 (100%), Nov 2022 (100%), Dec 2022 (100%).