Updating CAMELS-AUS to increase the catchment sample, lengthen hydrometeorological timeseries, and improve attribute information

This presentation will introduce version 2 (v2) of the Australian edition of the Catchment Attributes and Meteorology for Large-sample Studies (CAMELS) dataset. Since its initial release in 2021, CAMELS-AUS has been important in advancing research on hydrological change, arid-zone hydrology, and hydrological model refinement, with uptake by researchers both in Australia and internationally. This update significantly expands the dataset's scope and utility. The number of catchments covered has more than doubled, increasing from 222 to 561. Temporal coverage has been extended by eight years, now reaching 2022, compared to 2014 in the previous version. Furthermore, the quality and depth of attribute information has been enhanced, with improvements in information regarding hydrological signatures and streamflow uncertainty quantification. These  changes position CAMELS-AUS v2 as an improved and up-to-date resource for hydrological research and practical applications across Australia. CAMELS-AUS v2 is freely downloadable from https://doi.org/10.5281/zenodo.12575680