The NetCDF files provided here (HOPEa2?_1271-2000_ocpt_lev_0???m_interpolated_r128x349.nc) represents ocean potential temperature from ensemble members a22 and a29 of the ECHO-G simulations. For each of the ensemble members, data from the upper ocean (mid-layer depths 10 m, 30 m, 51 m, 75 m, and 100 m) is provided. Each time series spans model years 1271 to 2000, which correspond to a real calendar time range from 7.000 ka BP to 0.290 ka in the future. For usability of the data, we interpolated the data to a common latitudinal 0.5° degree resolution. The longitudinal resolution is identical to the standard model grid (increment: 2.8125°).