1 / 13

High-Resolution Climate Modeling Support: GMAO MERRA Data Set (1979-Present)

The GMAO MERRA Data Set provides critical resources for climate modeling support, featuring a half-degree resolution dataset with over 75.5 TB of data archived since 1979. Currently restricted access, this dataset includes 15 parameter subsets and facilitates inter-comparison analyses through input observed data against model output. As GMAO considers public distribution, the rolling archive supports ongoing research, with future enhancements including higher resolution datasets. Collaborations have generated high-quality distribution services, enhancing user experience in climate modeling studies.

jariah
Télécharger la présentation

High-Resolution Climate Modeling Support: GMAO MERRA Data Set (1979-Present)

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Climate Modeling SupportatGES DISC Forward Stream data set and subsets GMAO MERRA Data Set 1979 – Present

  2. Forward stream support • ½ deg data set resolution • Restricted access data set • Parent granule data continuously archived and available by FTP • 15 Parameter subsets created and pushed/pulled to various instrument teams. Data provided as 60 day rolling archive. • Higher resolution data set HDF5 and ¼ deg data set shortly to be delivered by GMAO to DISC • Initially provided as restricted access dataset • Currently being considered by GMAO for public distribution

  3. MERRA Data Set • Time period 1979 – Present (Feb. 2011) • Data holdings ~ 75.5 TBS, 284,020 files • Data Distribution • Cumulative stats (12/08 – 04/11) • 618 TBs • 37.8 Million files • Apr/2011 stats • 46.0 TBS • 4.3 Million files

  4. GMAO MERRA Obsvs Model dataset • New dataset more specialized than MERRA • Provides a deeper understanding of MERRA • User may see a strange/ questionable model feature • Input observed data can be compared with model output to evaluate reasonableness/error of feature • Obs satellite/conventional data on same model grid to facilitate inter-comparison analyses

  5. Gridded data characteristics-1 • Total data volume ~ 1 TB • Satellites (SSMI, NOAA, AIRS, AMSU,HIRS, MSU, etc) • Diurnal, monthly brightness temps • Conventional data buoy, ship, soundings, etc • Daily, sub-daily • Temporal period varies with satellite • Number of products ~150 • each prod. requires a DIFF for GCMD publication • Each product requires a GRADS control file

  6. Gridded data characteristics-2 • Three grid types • Observed minus Analysis • Observed minus Forecast • Observed values • Variables • Mean difference • SD of difference • # observed values per grid box

  7. Planned User Interface • Similar but separated from MERRA portal ordering page • Two tier product grouping • Satellite • Sub-product • Access services GRADS and FTP (no subsetting) • normal level of user support

  8. Questions to UWG • Does UWG consider that this dataset fits in to DISC’s climate modeling support role? • Should we consider ingesting other datasets of this type to facilitate modeling research studies?

  9. Some background notes • Close collaboration with GMAO (Mike, Arlindo & Gi-Kong) has resulted in production of a very high quality distribution service which has been well received and praised by our user community. • Excellent support and hard work by our contractors (Dana, Bhagi, Guang-dih) • Arlindo author of our grad’s subsetter (LATS4D) and new observed vs model datset.

More Related