Creating weather pattern data for DePreSys4 The steps used to create the daily weather patterns for DePreSys4 are described below. The steps are carried out individually for each of the 10 ensemble members which are labelled r1i1p1f2-r10i1p1f2. The general method of assignment is the same one used in Pope et al. (2022) and Cotterill et al. (2022). First, we create mean daily psl values for each day of the year over a baseline period.