[[PageOutline]] Last edited [[Timestamp]] [[BR]] '''Author''' : Karen Edwards '''ticket''' : #855 '''Branch''' : [https://forge.ipsl.jussieu.fr/nemo/browser/branches/2011/dev_r2802_TOP_substepping] ---- === Description === Update the substepping option (using nn_dttrc) to work in the new TOP routines in VN3.3.1. This includes reintroducing the variable nittrc000 throughout the code and including the provision for averaging physics variables over the substep period. ---- === Testing === Testing could consider (where appropriate) other configurations in addition to NVTK]. ||NVTK Tested||!'''NO!'''|| ||Other model configurations||!'''AMM7, MED12'''|| ||Processor configurations tested||1, 2 and 32 processors|| ||If adding new functionality please confirm that the [[BR]]New code doesn't change results when it is switched off [[BR]]and !''works!'' when switched on||!'''YES!'''|| (Answering UNSURE is likely to generate further questions from reviewers.) 'Please add further summary details here' * Processor configurations tested * etc---- === Bit Comparability === ||Does this change preserve answers in your tested standard configurations (to the last bit) ?||!'''YES/NO !'''|| ||Does this change bit compare across various processor configurations. (1xM, Nx1 and MxN are recommended)||!'''YES/NO!'''|| ||Is this change expected to preserve answers in all possible model configurations?||!'''YES - for physics/ NO - for TOP models'''|| ||Is this change expected to preserve all diagnostics? [[BR]]!,,!''Preserving answers in model runs does not necessarily imply preserved diagnostics. !''||!'''YES!'''|| If you answered !'''NO!''' to any of the above, please provide further details: * Which routine(s) are causing the difference? * Why the changes are not protected by a logical switch or new section-version * What is needed to achieve regression with the previous model release (e.g. a regression branch, hand-edits etc). If this is not possible, explain why not. * What do you expect to see occur in the test harness jobs? * Which diagnostics have you altered and why have they changed?Please add details here........ ---- === System Changes === ||Does your change alter namelists?||!'''YES/NO !'''|| ||Does your change require a change in compiler options?||!'''YES/NO !'''|| If any of these apply, please document the changes required here....... ---- === Resources === !''Please !''summarize!'' any changes in runtime or memory use caused by this change......!'' ---- === IPR issues === ||Has the code been wholly (100%) produced by NEMO developers staff working exclusively on NEMO?||!'''YES/ NO !'''|| If No: * Identify the collaboration agreement details * Ensure the code routine header is in accordance with the agreement, (Copyright/Redistribution etc).Add further details here if required..........