1. PROJECT ------------ Title: Electrical Aspects of Rain Generation Dates: 03/17 – 09/20 Funding organisation: UAE National Centre for Meteorology and Seismology 2. DATASET ------------ Title: Dataset for ‘Consistent dust electrification from Arabian Gulf sea breezes’ Description: This dataset contains atmospheric electric field, visibility and aerosol backscatter from a ceilometer contained within the paper ‘Consistent dust electrification from Arabian Gulf sea breezes’ by Nicoll, K.A., R.G. Harrison, G.M. Marlton and M.W. Airey, submitted to Environmental Research Letters (2020). The measurements were obtained at Al Ain airport (24°15' N, 55°37' E), United Arab Emirates (UAE) in the year 2018. The data has been used within this paper to study the electrification of dust lofted by sea breeze events. Electric field was measured by a Campbell CS110 electric field mill at 3m height. Visibility measured by a Biral SWS100 visibility sensor on the same mast as the CS110. The Vaisala CL31 ceilometer was installed approximately 300m from the other sensors. Publication Year: 2020 Creator(s): Dr Keri Nicoll, Prof R. Giles Harrison, Dr Graeme Marlton, Dr Martin Airey Organisation(s): University of Reading Rights-holder(s): University of Reading 3. TERMS OF USE ----------------- This dataset is licensed by the rights-holder(s) under a Creative Commons Attribution 4.0 International Licence: https://creativecommons.org/licenses/by/4.0/. 4. CONTENTS ------------ Three zip folders are included within the dataset: Folder 1: Electric_field_2018.zip Folder 2: Visibility_2018.zip Folder 3: Fig2and3_case_study.zip The contents of each folder will now be described below. Folder 1 contains all Electric field (Efield data) used within the paper for the year 2018. Files are daily files, with Efield measured at 1Hz. The file name convention is as follows: YYMMDDEfield.csv where YY = year, MM = month and DD = day. E.g. 180129Efield.csv is for 29th Jan 2018. Column headings in each file are as follows: Time/date stamp, read number, Efield (V/m), leakage current, status flag. Only the Efield column is relevant (all other columns relate to manufacturer requirements). Folder 2 contains all visibility data used within the paper for the year 2018. Files are daily files, with visibility measured at 1 minute resolution. The file name convention is as follows: YYMMDDVisibility.csv where YY = year, MM = month and DD = day. E.g. 180129visibility.csv is for 29th Jan 2018. Column headings in each file are as follows: Time/date stamp, read number, visibility (km), Present Weather code, monitor flag. Only the visibility and present weather columns are relevant (all other columns relate to manufacturer requirements). Folder 3 contains the individual daily files for Efield and visibility used in the case study in Figure 2 and 3 of the paper. 180203Efield.csv 180203visibilty.csv (see above for file format interpretation) This folder also contains a separate folder containing the hourly aerosol backscatter files from the ceilometer for the day of the case study (03/02/18): ceilometer_030218. This contains 24 separate files – one for each hour of the data. The data is in the raw format provided by the manufacturer (and logged every 3 seconds). Details on interpretation of this file are given in the manufacturer’s user guide on P60 of the PDF: http://cedadocs.ceda.ac.uk/1240/1/CL31_User%27s_Guide_M210482EN-F.pdf 5. METHOD and PROCESSING -------------------------- The data provided are the raw data from the sensors. No pre-processing of data has been performed other than to log the data. For each of the different measurement types, details of the sensors used and a link to the manufacturer user manuals is provided below. Electric field was measured by a Campbell CS110 electric field mill at 3m height. https://s.campbellsci.com/documents/us/manuals/cs110.pdf Visibility was measured by a Biral SWS100 visibility sensor on the same mast as the CS110. https://www.biral.com/wp-content/uploads/2018/02/SWS-Manual-105223.08B.pdf Aerosol backscatter was measured by a Vaisala CL31 ceilometer. http://cedadocs.ceda.ac.uk/1240/1/CL31_User%27s_Guide_M210482EN-F.pdf