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Data associated with “Adapting the COSP Radar Simulator to Compare GCM Output and GPM Precipitation Radar Observations”

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dc.contributor.authorRiley Dellaripa, Emily M.
dc.contributor.authorFunk, Aaron
dc.contributor.authorSchumacher, Courtney
dc.contributor.authorBai, Hedanqiu
dc.contributor.authorSpangehl, Thomas
dc.coverage.spatialGlobalen_US
dc.coverage.temporal2017-06-06-2017-06-39en_US
dc.date.accessioned2021-06-01T23:02:23Z
dc.date.available2021-06-01T23:02:23Z
dc.date.issued2021
dc.descriptionThis dataset includes the global 2° and 1° CAM5 output variables for June 2017 that were used as input into our version of the COSP simulator package as described in the publication. A README file is included to describe the unix scripts used to prepare the data files for input into COSP.en_US
dc.descriptionDepartment of Atmospheric Science
dc.description.abstractComparisons of precipitation between general circulation models (GCMs) and observations are often confounded by a mismatch between model output and instrument measurements, including variable type and temporal and spatial resolution. To mitigate these differences, the radar-simulator Quickbeam within the Cloud Feedback Model Intercomparison Project (CFMIP) Observation Simulator Package (COSP) simulates reflectivity from model variables at the sub-grid scale. This work adapts Quickbeam to the dual-frequency Precipitation Radar (DPR) onboard the Global Precipitation Measurement (GPM) satellite. The longer wavelength of the DPR is used to evaluate moderate-to-heavy precipitation in GCMs, which is missed when Quickbeam is used as a cloud radar simulator. Latitudinal and land/ocean comparisons are made between COSP output from the Community Atmospheric Model version 5 (CAM5) and DPR data. Additionally, this work improves the COSP sub-grid algorithm by applying a more realistic, non-deterministic approach to assigning GCM grid box convective cloud cover when convective cloud is not provided as a model output. Instead of assuming a static 5% convective cloud coverage, DPR convective precipitation coverage is used as a proxy for convective cloud coverage. For example, DPR observations show that convective rain typically only covers about 1% of a 2°grid box, but that the median convective rain area increases to over 10% in heavy rain cases. In our CAM5 tests, the updated sub-grid algorithm improved the comparison between reflectivity distributions when the convective cloud cover is provided versus the default 5% convective cloud cover assumption.en_US
dc.description.sponsorshipThis research was supported by the NASA Data for Operation and Assessment (NDOA) program grant NNX17AH45G. Emily Riley Dellaripa was also supported by NASA CYGNSS grant NNX17AH77G. We would like to acknowledge high-performance computing support from Cheyenne (doi:10.5065/D6RX99HX) provided by NCAR's Computational and Information Systems Laboratory, sponsored by the National Science Foundation, and from the Texas A&M Supercomputing Center.en_US
dc.format.mediumNetCDF
dc.format.mediumTAR
dc.format.mediumGZIP
dc.format.mediumTXT
dc.format.mediumSH
dc.identifier.urihttps://hdl.handle.net/10217/232461
dc.identifier.urihttp://dx.doi.org/10.25675/10217/232461
dc.languageEnglishen_US
dc.language.isoengen_US
dc.publisherColorado State University. Librariesen_US
dc.relation.ispartofResearch Data
dc.relation.isreferencedbyRiley Dellaripa, E. M., A. Funk, C. Scumacher, H. Bai, and T. Spangehl, 2021: Adapting the COSP Radar Simulator to Compare GCM Output and GPM Precipitation Radar Observations, J. Atmos. Ocean. Technol., 38,1457-1475. https://doi.org/10.1175/JTECH-D-20-0089.1en_US
dc.rights.licenseThe material is open access and distributed under the terms and conditions of the Creative Commons Public Domain "No rights reserved" (https://creativecommons.org/share-your-work/public-domain/cc0/).
dc.rights.urihttps://creativecommons.org/share-your-work/public-domain/cc0/
dc.subjectCAM5en_US
dc.subjectCOSPen_US
dc.subjectGPMen_US
dc.titleData associated with “Adapting the COSP Radar Simulator to Compare GCM Output and GPM Precipitation Radar Observations”en_US
dc.typeDataseten_US

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CAM5_for_COSP_README.txt
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 README for data use instructions
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COSP_CAM5_t3.cam.h2.2017-06-01-03600_REFF.nc.gz
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782.29 MB
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 Effective radius variables from CAM5 2° run for 1-30 June 2017
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COSP_CAM5_t3.cam.h2.2017-06-01-03600_numconc.nc.gz
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 Number concentration variables from CAM5 for 2° run for 1-30 June 2017
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COSP_CAM5_t3_CFAD.cam.h2.2017-06-01-03600.nc.tar.gz
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 2° CAM5 file that contains 1-3 June 2017
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COSP_CAM5_t3_CFAD.cam.h2.2017-06-04-03600.nc.tar.gz
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 2° CAM5 file that contains 4-6 June 2017
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