edu.ucar.gdex::d198000 eng; USA utf-8 dataset NSF NCAR Geoscience Data Exchange datahelp@ucar.edu https://gdex.ucar.edu NSF NCAR Geoscience Data Exchange The Geoscience Data Exchange (GDEX), managed by the Computational and Information Systems Laboratory (CISL) at NSF NCAR, contains a large collection of meteorological, atmospheric composition, and oceanographic observations, and operational and reanalysis model outputs, integrated with NSF NCAR High Performance Compute services to support atmospheric and geosciences research. download pointOfContact 2026-04-22T01:47:29Z ISO 19115 Geographic Information - Metadata ISO19115:2003/Cor 1 2006 https://doi.org/10.5065/3CF6-8910 The GLACE Hydrology Experiment d198000 2020-08-20 publication Kumar, Sanjiv author NSF National Center for Atmospheric Research publisher The GLACE Hydrology experiment investigates the impact of land and atmosphere anomaly coupling on land variability. This is a new two-stage climate model experimental design . First, as in the GLACE and CMIP5 experiment, two identical sets of coupled land and atmosphere climate model (CAM5 with CLM4.5) ensembles are performed, with each simulation using the same prescribed observed sea surface temperatures and radiative forcing for the years from 1971 to 2014. In one set, land and atmosphere anomaly coupling is removed by prescribing soil moisture to follow the control model seasonal soil moisture climatology (land and atmosphere uncoupled), to enable a contrast with the original control set (land and atmosphere coupled). Then, the atmospheric outputs from both sets of simulations are used to force land-only ensemble simulations, allowing investigation of the resulting soil moisture variability and memory under both the coupled and uncoupled scenarios. We implemented the GLACE Hydrology experiment in the Community Earth System Modeling framework (CESM) using the Community Atmospheric Model version 5 (CAM5) and Community Land Model version 4.5 (CLM4.5) and performed two 10 member ensemble experiments with the observed monthly sea surface temperature data from 1971 to 2014 as the oceanic boundary condition. Each ensemble member was created by a small random perturbation to initial atmospheric conditions using the same method as in the CESM Large Ensemble. The same land model initial conditions, taken from a transient land-only CLM4.5 simulation are used in all the simulations. For each ensemble member, we first perform the control experiment and then use its soil moisture climatology to make the corresponding land/atmosphere uncoupled atmosphere simulation. The 3-hourly atmospheric data from each ensemble member, having been saved, is then (in stage 2) used to drive the corresponding land-only simulation. completed datahelp@ucar.edu pointOfContact notPlanned dataset https://gdex.ucar.edu/images/ds_logos/default_200_200.png Logo thumbnail from URL png NetCDF4 dataset Resource Type 2021-03-30 revision 4.4 DataCite Metadata Working Group orginator resourceTypeGeneral CESM > NCAR Community Earth System Model U.S. National Aeronautics and Space Administration Global Change Master Directory GCMD 2026-04-15 revision 23.7 NASA Global Change Master Directory orginator Valids List: Platforms EARTH SCIENCE > AGRICULTURE > SOILS > SOIL MOISTURE/WATER CONTENT EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC RADIATION > NET RADIATION EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC TEMPERATURE > SURFACE TEMPERATURE > AIR TEMPERATURE EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WATER VAPOR > WATER VAPOR PROCESSES > EVAPORATION EARTH SCIENCE > ATMOSPHERE > PRECIPITATION > LIQUID PRECIPITATION > RAIN EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > GROUND WATER > GROUND WATER PROCESSES/MEASUREMENTS > DRAINAGE EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > SURFACE WATER > SURFACE WATER PROCESSES/MEASUREMENTS > RUNOFF U.S. National Aeronautics and Space Administration Global Change Master Directory GCMD 2026-04-15 revision 23.7 NASA Global Change Master Directory orginator Valids List: Science and Services Keywords Creative Commons Attribution 4.0 International License None grid 1.25 eng utf-8 climatologyMeteorologyAtmosphere -180.0 180.0 -90.0 90.0 1971-01-01T0000+00 2015-09-01T0000+00 NSF NCAR Geoscience Data Exchange datahelp@ucar.edu https://gdex.ucar.edu distributor 379627.895 https://gdex.ucar.edu/datasets/d198000/ https Dataset Description Related Link information https://gdex.ucar.edu/datasets/d198000/dataaccess/ https Data Access Related Link download none asNeeded