Since the GEOS-5 seasonal forecasts are global with an initialized sea-ice distribution, the GMAO has begun to contribute to the Sea Ice Outlook for September Sea Ice extent organized by SEARCH and ARCUS. The consensus is for an increasing downward trend of September sea ice extent, well below the 1979-2007 September mean.
The GEOS-5 Observation Impact Monitoring System has been upgraded to include the effects of moist physical processes. The upgrade provides more accurate estimates of observation impact in GEOS-5, especially for moist-sensitive observations from AIRS, MHS, TMI, and some wind observations. View Observation impacts.
The story “Planet on Fire” went live in the NASA Visualization Explorer iPad app on March 7. It showcases a global tour of fires from the MODIS instruments aboard the Terra and Aqua satellites and the GEOS-5/GOCART models run by the Global Modeling and Assimilation Office (GMAO, 610.1) on the NASA Center for Climate Simulation (NCCS, 606.2) Discover supercomputer. The story has received over 131,700 hits. The story content is available on the Scientific Visualization Studio (SVS, 606.4) website.
The NASA Technical Memorandum, Atmospheric Reanalyses—Recent Progress and Prospects for the Future. A Report from a Technical Workshop, April 2010 (TM—2012-104606-Vol 29) is now available.
In April 2010, developers representing each of the major reanalysis centers met at Goddard to discuss technical issues—system advances and lessons learned—associated with recent and ongoing atmospheric reanalyses and plans for the future. The meeting included overviews of each center's development efforts, a discussion of the issues in observations, models and data assimilation, and, finally, identification of priorities for future directions and potential areas of collaboration. This report summarizes the deliberations and recommendations from the meeting as well as some advances since the workshop.
To mark Earth Day 2012, we are inviting you to create your own compelling video vision of NASA's exploration of Earth. You could be selected to view the launch of an upcoming Earth science mission in person! Deadline is May 31, 2012.
A new ocean surface diagnostics product and a new land surface diagnostics product have been added to the suite of MERRA data. The new ocean surface product is a 1-hourly, 2-dimensional ocean surface diagnostics product on a 2/3 by 1/2 degree grid. The product is also available as a monthly mean and seasonal product. A supplemental and improved set of hourly land surface hydrological fields ("MERRA-Land") on a 2/3 by 1/2 degree grid benefits from corrections to the precipitation forcing with a global gauge-based precipitation product and from revised parameter values in the rainfall interception model, changes that effectively correct for known limitations in the MERRA surface meteorological forcings.
The NASA Technical Memorandum, by Andrea Molod and colleagues in the GMAO's model development group describes the climatology of atmospheric simulations with the Fortuna version of the GEOS-5 AGCM. This is the current public release version of GEOS-5 and the version that was used for the GMAO's CMIP5 simulations. The document summarizes an extensive evaluation of the mean climate of many simulated fields with available observational estimates from satellites and reanalyses. It also describes the evolution from the version of GEOS-5 used for MERRA to the Fortuna version.
The GMAO is supporting the National Climate Assessment (NCA) by providing enabling tools of assimilated data sets that synthesize and integrate the existing satellite (and conventional) data streams for the EOS/Aura period. As an initial contribution, regional and sector-specific products have been derived from MERRA and are available from our NCA web page. Our plan is to develop products from an ongoing climate analysis using GMAO's integrated assimilation systems that will enable an on-going, permanent assessment capacity and capability.
The GMAO has started the real time GEOS-5.7.2 data assimilation production on August 19, 2011. The new system generates data products at ¼ deg horizontal resolution and of significantly improved quality, resulting from many advances made in both the model and analysis. The GEOS-5.2.0 data production will continue in parallel until the end of 2011, to allow GEOS-5 real time data users ample time to transition to the new products.
A visualization of a GEOS-5 atmospheric carbon cycle simulation conducted at Oak Ridge National Laboratory (ORNL) has been highlighted in the list of the Best Science Visualization Videos of 2009 by Wired magazine. The visualization was produced at ORNL by Jamison Daniel and David Erickson.
The Modern Era Retrospective-analysis for Research and Applications (MERRA) production is underway and multi-year segments of the meteorological analyses from each of the 3 production streams are now available online at the GES DISC.