# Land diagnostic outputs from ACCESS-3 **URL:** \ **Category:** Biogeochemistry Land\ **Tags:** access-cm3, access-esm\ **Created:** [6 February 2024 03:29 UTC](https://forum.access-hive.org.au/t/land-diagnostic-outputs-from-access-3/1781 "2024-02-06T03:29:05Z")\ **Posts on this page:** 1\ **Showing post:** 3
**Author:** ![inh599](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.access-hive.org.au/inh599/32/3400_2.png) [@inh599](https://forum.access-hive.org.au/u/inh599)\ **Post date:** [14 February 2024 05:16 UTC](https://forum.access-hive.org.au/t/land-diagnostic-outputs-from-access-3/1781/3 "2024-02-14T05:16:43Z")
@CloLanglais - could we clarify/check what you discussing? I suspect that the information is already provided - and it is our intention to ensure that equivalent fields are provided as part of CM3/ESM3 - but I may have misunderstood. Both ACCESS-ESM1.5 and ACCESS-CM2 provide gridded runoff information via CMOR variables `mrro` (total = surface+deep drainage) and `mrros` (surface runoff). These are available at different time resolutions (monthly or daily averages) for most (all?) simulations under directories `Lmon` or `day` under the respective sections on project fs38 on the NCI. River outflow into the ocean is also available from both models as CMOR variable `friver` at monthly time resolutions (directory `Omon`). However note that `friver` is provided aligned to the river model grid (1x1 degree) and this differs to the UM/land grid. Additionally - notes of caution - i) in order to better satisfy the technical requirements of global conservation of water, river outflow in CM2 is scaled globally to balance net water added/lost elsewhere in the terrestrial system (evaporation from lakes, inland water basins). This is typically a small effect - but conceptually it does imply that runoff integrated over a catchment may not equal river outflow. ii) water conservation/runoff from the ice regions is complicated by the iceberg schemes - these differ between ESM1.5 and CM2. --- _[View the full topic](https://forum.access-hive.org.au/t/land-diagnostic-outputs-from-access-3/1781)._