About 90% of the anthropogenic increase in heat stored in the climate system 6 is found the oceans. Therefore it is relevant to understand the details of ocean heat up7 take. Here we present a detailed, process-based analysis of ocean heat uptake (OHU) pro8 cesses in HiGEM1.2, an atmosphere-ocean general circulation model (AOGCM) with an 9 eddy-permitting ocean component of 1/3 resolution. Simi...