Compositional data of clinopyroxene crystals standards analysed by electron probe microanalyses for major element oxides and by Mossbauer spectroscopy for iron valence and unknown clinopyroxene crystals from Iceland and the Azores . These data were collected in support of research described in the following preprints: https://doi.org/10.31223/X5CT03 and https://doi.org/10.31223/X5N959

FWHM of aragonite samples precipitated from seawater, using a pH stat titrator using the constant composition technique between September 2021 and December 2022. Data were collected to determine how changes in the calcification fluids of calcareous organisms affect aragonite structure. Data were collected by Giacomo Gardella, Sam Presslee and Nicola Allison and interpreted by Giacomo Gardella, Cristina Castillo Alvarez, Nicola Allison, Adrian Finch, Kirsty Penkman, Roland Kröger, Sam Presslee and Matthieu Clog.

FWHM of coral skeletal samples from 7 coral genotypes cultured in an aquarium at seawater pCO2 of 180, 260, 400 and 750 µatm and at seawater temperature of 25 and 28 degrees C (39 samples total). Data were collected to determine how environmental conditions influence disorder in the aragonite lattice of coral skeletons. Data were collected between August 2020 and December 2022 by Phoebe Ross, Celeste Kellock, Cristina Castillo Alvarez and Nicola Allison and interpreted by Phoebe Ross, Celeste Kellock, Cristina Castillo Alvarez, David Evans, Nicola Allison, Adrian Finch, Kirsty Penkman, Roland Kröger, and Matthieu Clog.

FWHM of 19 aragonite samples precipitated from seawater, using a pH stat titrator using the constant composition technique between August 2020 and December 2022. Aragonite precipitation rates are estimated from the rate of titrant dosing. Data were collected to determine how changes in the calcification fluids of calcareous organisms affect aragonite structure. Data were collected by Cristina Castillo Alvarez and Nicola Allison and interpreted by Cristina Castillo Alvarez, Nicola Allison, Adrian Finch, Kirsty Penkman, Roland Kröger and Matthieu Clog.

Major and trace element data for olivine- and plagioclase-hosted silicate melt inclusions, their host minerals, and associated matrix glasses, from Midfell, Snaefellsjokull and Oraefajokull, Iceland. Melt inclusion compositions are provided as measured, and corrected for post-entrapment crystallization. Reflected light images of the melt inclusions.

The data are from a proof-of-concept study to assess the feasibility of accurately measuring ozone (O3) and hydroxyl (OH) profiles from the ground using accessible satellite TV receiver technology. The datasets include a synthesis of atmospheric model and a priori atmospheric datasets for selected polar locations, atmospheric transmittance spectra calculated for those locations, and O3 and OH profile retrieval results.