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Ocean-driven basal melting of Antarctic ice shelves plays an important role in the mass loss of the Antarctic Ice Sheet. Ice shelf cavity-resolving ocean models are a valuable tool for understanding ice shelf-ocean interactions and for simulating projections of ice shelf and ocean states under future climate. Designed to assess the current state of ice shelf\u2013ocean modelling, the second Ice Shelf\u2013Ocean Model Intercomparison Project, ISOMIP+, consists of 12 ocean model configurations submitted with a common, idealised experimental setup. Here, we focus on the experiments Ocean0\u20132 (Asay-Davis et\u00a0al.,\u00a02016), which are ocean models with idealised, static ice shelf geometries, but where the ocean reaches a balance with prescribed far-field ocean conditions. Different thermal transfer coefficient values (ranging from 0.011 to 0.2) are used for each model in the melting parameterisation to achieve a common, tuned melt rate since the models cover a range of types of vertical coordinates, ice\u2013ocean boundary layer treatments, and numerical schemes. These model differences lead to spread in the resultant ocean properties, circulation, boundary-layer structure and spatial distribution of melting. We also highlight similarities between models, such as a shared linear relationship across most models between melt rate and overturning and barotropic streamfunctions during the spin-up and spin-down, demonstrating a robust relationship between melt and circulation across models and forcing conditions. The ISOMIP+ results provide a systematic comparison of ice shelf cavity-capable ocean models. However, we also demonstrate the need for realistic ice shelf\u2013ocean model intercomparison projects (some already underway) to assess model biases and inter-model variation against sparse observations. Further research is needed to understand the differences between models and further improve our modelled representations of the ice\u2013ocean boundary layer and ice shelf cavity circulation.<\/jats:p>","DOI":"10.5194\/tc-20-2053-2026","type":"journal-article","created":{"date-parts":[[2026,4,13]],"date-time":"2026-04-13T13:01:28Z","timestamp":1776085288000},"page":"2053-2088","source":"Crossref","is-referenced-by-count":0,"title":["Results of the second Ice Shelf\u2013Ocean Model Intercomparison Project (ISOMIP+)"],"prefix":"10.5194","volume":"20","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0052-7668","authenticated-orcid":false,"given":"Claire K.","family":"Yung","sequence":"first","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1990-892X","authenticated-orcid":false,"given":"Xylar S.","family":"Asay-Davis","sequence":"additional","affiliation":[]},{"given":"Alistair","family":"Adcroft","sequence":"additional","affiliation":[]},{"given":"Christopher Y. 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