Publication Date:
2023-12-12
Description:
Size segregated aerosol samples were collected during the OASIS (“Organic very short lived substances and their Air Sea Exchange from the Indian Ocean to the Stratosphere”) cruises (FS Sonne, SO234-2 & SO235) during 8 - 20 July & 23 July – 7 August 2014 in the southern Indian Ocean (~30 E - 75 E, 30 S – 5 N). The samples were collected by Birgit Quack of GEOMAR, Kiel, Germany. The aerosol sampler was situated on the roof of the ship's wheelhouse and was connected to an automatic wind sector controller to prevent contamination of the samples from the ship's stack. Most samples were collected using a Sierra-type cascade impactor to separate the aerosol particles at an aerodynamic diameter cutoff of 1 µm. Collection time for these samples varied between 27.7 and 46.9 hours. For one sample, 6 impactor stages and a backup filter were used to give more detailed information aerosol size distribution. This sample was collected over 91.7 hours. Samples were extracted with ultrapure water and the major ions Na+, NH4+, Mg2+, K+, Ca2+, Cl-, NO3-, SO42-, oxalate, Br- and methanesulfonate were determined by ion chromatography (IC). Total soluble iodine (TSI) was determined by inductively coupled plasma - mass spectrometry (ICP-MS) and iodide (I-) and iodate (IO3-) were determined by IC-ICP-MS. The dataset contains the atmospheric concentrations of all measured soluble major ions (in nmol/m³) and iodine species (in pmol/ m³).
Keywords:
Aerosol size distribution; Air volume; Ammonium, soluble; Ammonium, soluble, standard deviation; Bromide, soluble; Bromide, soluble, standard deviation; Calcium, soluble; Calcium, soluble, standard deviation; Chloride, soluble; Chloride, soluble, standard deviation; Date/Time of event; Date/Time of event 2; Elemental species separation and detection (IC-ICP-MS); Event label; High volume aerosol collector (Graseby-Anderson type); Inductively coupled plasma - mass spectrometry (ICP-MS); Iodate, soluble; Iodate, soluble, standard deviation; Iodide, soluble; Iodide, soluble, standard deviation; Iodine, soluble; Iodine, soluble, standard deviation; iodine speciation; Ion chromatography; Latitude of event; Latitude of event 2; Longitude of event; Longitude of event 2; Magnesium, soluble; Magnesium, soluble, standard deviation; major ions; Methane sulfonic acid; Methane sulfonic acid, standard deviation; Nitrate, soluble; Nitrate, soluble, standard deviation; OASIS; Oxalate, soluble; Oxalate, soluble, standard deviation; Potassium, soluble; Potassium, soluble, standard deviation; Sample code/label; Size fraction; SO234/2; SO234/2_MI01; SO234/2_MI02; SO234/2_MI03; SO234/2_MI04; SO234/2_MI05; SO235; SO235_MI09; SO235_MI10; SO235_MI11; SO235_MI13; SO235_MI14; Sodium, soluble; Sodium, soluble, standard deviation; Sonne; Southern Indian Ocean; SPACES II; Sulfate, soluble; Sulfate, soluble, standard deviation
Type:
Dataset
Format:
text/tab-separated-values, 709 data points
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