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610.1/GMAO GEOS-5 Data Production Overview

610.1/GMAO GEOS-5 Data Production Overview. Gi-Kong Kim. Introduction to 610.1/GMAO & GEOS-5. Focus of the presentation: Introduce GESDIS staff to the GEOS-5 production at a high level and the collaboration between GES DISC and GMAO for the end-to-end GEOS-5 production operations.

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610.1/GMAO GEOS-5 Data Production Overview

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  1. 610.1/GMAO GEOS-5 Data Production Overview Gi-Kong Kim

  2. Introduction to 610.1/GMAO & GEOS-5 • Focus of the presentation: • Introduce GESDIS staff to the GEOS-5 production at a high level and the collaboration between GES DISC and GMAO for the end-to-end GEOS-5 production operations Office Head Michele Rienecker • GMAO has been established as a core resource in the development and use of satellite observations through the integrating tools of models and assimilation systems. Global ocean, atmosphere and land surface models are developed as components of assimilation and forecast systems as well as for addressing the weather and climate research questions . • The GEOS-5 data assimilation system (DAS) is based on the GEOS-5 Atmospheric General Circulation Model (AGCM) integrated with the Gridpoint Statistical Interpolation (GSI) Analysis. ESMF IT Liason Production I&T; Ops SW; Production; Sys admin Modeling AGCM; LSM; OGCM; CGCM; Integration Assimilation Satellite Data; Analysis; Monitoring & Valid; OSSEs SSD I & Forecasts; ODAS; LDAS; Var & Pred Constituents Ozone; Aerosols; Ocean Bio; CCC

  3. GMAO Products Page: http://gmao.gsfc.nasa.gov/products/

  4. GEOS-5 Data Assimilation • GEOS-5 integrates the observations and models to produce the best representation of the atmospheric state • GEOS-5 covers the entire globe with physically consistent data

  5. GEOS-5 Data Assimilation Schematic

  6. Production Streams • Near Real Time (NRT): Assimilation products (DAS), • Forecasts (http://gmao.gsfc.nasa.gov/forecasts/) • Reprocessing for Instrument Teams • Long-term re-analysis: MERRA • Customized products: • - CERES team: uses controlled set of input obs to minimize data shock • when a new data type is introduced in the mid-stream • - YOTC

  7. GEOS-5.2.0 NRT Assimilation Products • V5.2.0 data are in HDF-4 at ½ deg spatial resolution. • The next version, v5.6.2, will be in HDF-5 at ¼ deg .

  8. GEOS-5 Data Users • EOS Instrument Teams: CERES, MLS, TES, CALIPSO, MODIS/Land • Science Support: GMI-CTM, GEOS-CHEM (Harvard), U of MD, … • Other Projects: GEWEX/CEOP, POWER, FLASHFlux, SRB, YOTC, GLDAS, • Flood Warning, SPARC-IPY, JAXA/SMILES, … • Field Experiments: Recently ARCTAS, TIGERZ-II, HIPPO, GloPac, GRIP (Aug, 2010) • General Users of MERRA products at GES DISC/MDISC

  9. Input Observations for NRT Production • Most of the input data for NRT are obtained via GES DISC. Some of the input data for • non –real time use are obtained directly from other sources such RSS, ECMWF, NCAR, … • All the input data are in BUFR format • Currently working with NRT AIRS data team at GES DISC to acquire AIRS radiance • data from LANCE.

  10. Data Processing • Processing done using HEC resources at NCCS • - Uses queues of sizes ranging from 144-cpu (1/2 deg) • to 720-cpu (1/4 deg) on the NCCS ‘discover’ system • - GCM performance scales well as the number of CPUs is increased, • but less so with GSI • - Throughput: 6dd/d – 10dd/d, 30dd/d desired (MERRA: 10dd/d) • (On the average, GEOS-5 system is upgraded once a year) • - High throughtput vs high spatial resolution • * NRT production timeline 12Z DAS 0Z DAS 6Z DAS 18Z DAS Post Proc Post Proc Post Proc Post Proc Data 18z 0z 6z 12z 0Z 5-day Fcst 12Z 5-day Fcst AIRS AIRS AIRS AIRS GDAS GDAS GDAS GDAS Z0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 0 L 7pm 1am 7am 1pm 7pm

  11. Quality Assurance • Online QA • - Input observations are screened before the analysis • - Output QC by QuADS (range check, hydrostatic check, ..) • Offline product quality assessment • - Monitoring meeting held weekly • - Various analysis and monitoring tools • are developed and used • E.g., OBS2HTML diagrams, • forecast skill scores, O-F and • O-A stats, comparison with data • from other centers (NCEP, ECMWF,..)

  12. Data Distribution • NRT data and MERRA via GES DISC • - NRT data distributed to subscribed users after predefined subsetting. • MERRA: On web-based online data system with various tools for data search and order (Mirador), subsetting, data transport (ftp, openDAP, GDS), visualization (Giovanni). MERRA user metrics (http://gmao.gsfc.nasa.gov/products/) show that data are being accessed by users from over the globe at a steady rate. • mdisc: http://disc.sci.gsfc.nasa.gov/mdisc/ • NCCS data portal for mission support and science collaborators • - Forecasts as well as assimilation products are made available • for mission support • - Data retained online for 6 months • - GRIP mission support page: http://gmao.gsfc.nasa.gov/projects/grip/

  13. Source for more information • GMAO research page: http://gmao.gsfc.nasa.gov/ • Technical report: ‘The GEOS-5 Data Assimilation System – • Documentation of Version 5.0.1, 5.1.0, and 5.2.0’

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