Published October 21, 2021 | Version v1
Dataset Open

Speciation of iodine in marine aerosol

Authors/Creators

  • 1. Instituto de Astrofísica de Andalucía - CSIC
  • 2. Instituto de Química-Física Rocasolano - CSIC
  • 3. University of East Anglia
  • 4. National Research Council (CONICET)

Description

We have compiled a comprehensive dataset of field observations of iodine speciation and size distribution in marine aerosol (1983-2018). Since the source of iodine is mainly marine, only ship-borne campaigns (16 cruises) and coastal or insular campaigns (12 ground-based stations) have been considered. Iodine speciation measurements are heterogeneous and do not always cover the same species or group of species. The data can be classified in five groups according to the iodine species reported and their size segregation in fine and coarse aerosol: (1) total iodine (TI) and total soluble iodine (TSI) in bulk aerosol, (2) TI size distribution, (3) TSI and soluble speciation size distribution, (4) soluble speciation in fine aerosol fraction only and (5) soluble speciation in bulk aerosol only. Soluble speciation consist of iodide (I-), iodate (IO3-) and soluble organic iodine (SOI).

For some of the cruises where the size distribution of soluble iodine species was reported (7 cruises) there are also measurements of major ions (MI) available. MI observations include Na+, NH4+, Mg2+, Ca2+, K+, Cl-, NO3-, SO42-, oxalate (C2O4-2), Br- and methanesulfonate (CH3SO3-), and derived quantities such as non-sea-salt (nss) K+, Ca2+ and SO42-.

The associated paper discusses some aspects of data treatment and questions related to analytical methods employed to determine iodine speciation.

Notes

Paper: Gómez Martín et al. (2022) On the speciation of iodine in marine aerosol, Journal of Geophysical Research: Atmospheres, doi:10.1029/2021JD036081 Financial Support: J. C. G. M. acknowledges financial support from the State Agency for Research of the Spanish MCIU through the "Center of Excellence Severo Ochoa" award to the Instituto de Astrofísica de Andalucía (SEV-2017-0709) and the Ramon y Cajal Program (RYC-2016-19570). A.S.-L. acknowledges financial support from the European Research Council Executive Agency under the European Union's Horizon 2020 Research and Innovation programme (Project 'ERC-2016-COG 726349 CLIMAHAL').

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