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CORDEX

CORDEX. KANAMARU Hideki. CORDEX. A COordinated Regional climate Downscaling EXperiment Develop a framework Foster an international coordinated effort for input to impact/adaptation work and to the IPCC AR5

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CORDEX

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  1. CORDEX KANAMARU Hideki

  2. CORDEX • A COordinated Regional climate Downscaling EXperiment • Develop a framework • Foster an international coordinated effort for input to impact/adaptation work and to the IPCC AR5 • Promote greater interaction and communication between global climate modelers, the downscaling community and end-users to better support impact/adaptation activities.

  3. a. Historical runs for the period Jan 1950 – Dec 2005 • b. RCP4.5 and RCP8.5 scenario runs for the period Jan 2006 – Dec 2100 • c. AMIP integrations : All years. • d. Decadal hindcasts/forecasts : A minimum of 3 members/GCM for the 3 integration periods initialized at the first date and run to the second date: (i) 1980-2010, (ii) 1990-2000, (iii) 2005-2035

  4. CMIP5-GCMs (6 hourly, global data on model levels, Temperature, eastward and northward wind velocity, specific humidity and surface pressure. Daily and/or monthly values of sea surface temperature, sea-ice fraction, soil moisture and soil temperature), early summer of 2010

  5. for the period 1989-2008. will be used to evaluate the downscaled results across different methods, models and regions of the world. • ERA-interim (6-hourly, global, multi level data 2°x2°version of the original ERA-interim), now

  6. Protocol • 0.44°x0.44° for an equatorial rotated coordinate system, resulting in a quasi-regular resolution of ~50km. • Groups may run higher resolution after completing 50km - 0.22°x0.22° resolution and 0.11°x0.11° resolution (suggested for Europe), for example • Spectral nudging or not • there is still an ongoing discussion as to whether 3-hourly values of 2-metre temperature and precipitation should also be stored at the central CORDEX archive

  7. Diagnostic study • Task Force on Regional Climate Downscaling (TFRCD) welcomes volunteers to coordinate analysis of CORDEX downscaled data on various domains. • Collation and quality-control of suitable observation data.

  8. Domains • RCM interior domain, i.e. the area left once the boundary relaxation zone is excluded.

  9. RMIP Regional Climate Model Intercomparison Project for Asia • RIEMS – China • RegCM3 - Japan • NJU MM5 - China • SNU RCM - Korea • MRI (JSM_BAIM) - Japan • CSIRO CCAM - Australia

  10. NARCCAP • North American Regional Climate Change Assessment Program • 1980-2004 • 2041-2070 minus 1971-2000

  11. Groups are encouraged to perform as many of the limited-area integrations as possible • Africa – focus region • We ask that the CORDEX domain be fully within your interior model domain and you try to deviate as little as possible from the requested domain, while still satisfying your own interests.

  12. Data archive • Core, relevant to all communities: monthly and seasonal means; • Tier 1, relevant to most communities: daily surface/selected upper air data; • Tier 2, higher frequency and more complete atmospheric/surface variables. • Danish Meteorological Institute

  13. Which version of RSM? • Which group to do what region with ERA-interim? • With CMIP5? • Global downscaling? • Link to your own research interests?

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