VECMAtk: a scalable verification, validation and uncertainty quantification toolkit for scientific simulations - D. Groen; H. Arabnejad; V. Jancauskas; W. N. Edeling; F. Jansson; R. A. Richardson; J. Lakhlili; L. Veen; B. Bosak; P. Kopta; D. W. Wright; N. Monnier; et al. (Philosophical Transactions of the Royal Society A - Mathematical, Physical and Engineering Sciences, 2021)