edu.ucar.opensky::articles:26700 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-24T19:22:49.565170 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d72z19mk https://doi.org/10.57931/1885756 https Related Dataset #1 IM3/HyperFACETS Thermodynamic Global Warming (TGW) Simulation Datasets https://doi.org/10.6078/D1941T https Related Dataset #2 Snowpack, precipitation, and temperature measurements at the Central Sierra Snow Laboratory for water years 1971 to 2019 https://doi.org/10.5065/D6WD3XH5 https Related Software #1 NCAR Command Language (NCL) Recreating the California New Year's flood event of 1997 in a regionally refined Earth System Model 2023-10-01T00:00:00Z publication https://n2t.org/ark:/85065/d72z19mk https://doi.org/10.1029/2023MS003793 Rhoades, A. M. author Zarzycki, C. M. author Inda-Diaz, H. A. author Ombadi, M. author Pasquier, U. author Srivastava, A. author Hatchett, B. J. author Dennis, E. author Heggli, A. author McCrary, Rachel author McGinnis, Seth A. author Rahimi-Esfarjani, S. author Slinskey, E. author Ullrich, P. A. author Wehner, M. author Jones, A. D. author UCAR/NCAR - Library publisher The 1997 New Year's flood event was the most costly in California's history. This compound extreme event was driven by a category 5 atmospheric river that led to widespread snowmelt. Extreme precipitation, snowmelt, and saturated soils produced heavy runoff causing widespread inundation in the Sacramento Valley. This study recreates the 1997 flood using the Regionally Refined Mesh capabilities of the Energy Exascale Earth System Model (RRM-E3SM) under prescribed ocean conditions. Understanding the processes causing extreme events informs practical efforts to anticipate and prepare for such events in the future, and also provides a rich context to evaluate model skill in representing extremes. Three California-focused RRM grids, with horizontal resolution refinement of 14 km down to 3.5 km, and six forecast lead times, 28 December 1996 at 00Z through 30 December 1996 at 12Z, are assessed for their ability to recreate the 1997 flood. Planetary to synoptic scale atmospheric circulations and integrated vapor transport are weakly influenced by horizontal resolution refinement over California. Topography and mesoscale circulations, such as the Sierra barrier jet, are better represented at finer horizontal resolutions resulting in better estimates of storm total precipitation and storm duration snowpack changes. Traditional time-series and causal analysis frameworks are used to examine runoff sensitivities state-wide and above major reservoirs. These frameworks show that horizontal resolution plays a more prominent role in shaping reservoir inflows, namely the magnitude and time-series shape, than forecast lead time, 2-to-4 days prior to the 1997 flood onset. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. None eng geoscientificInformation