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Retrospective-analyses (or reanalyses) have been a critical tool in studying weather and climate variability for the last 15 years. Reanalyses blend the continuity and breadth of output data of a numerical model with the constraint of vast quantities of observational data. The result is a long-term continuous data record. The Modern Era Retrospective-analysis for Research and Applications was developed to support NASA's Earth science objectives, by applying the state-of-the-art GMAO data assimilation system that includes many modern observing systems (such as EOS) in a climate framework.

The MERRA time period covers the modern era of remotely sensed data, from 1979 through the present, and the special focus of the atmospheric assimilation is the hydrological cycle.

The time period covered by the visualization is the months of May, June, and July of 1988 and 1993, two years with contrasting extreme weather events during the summer: a drought through the midwestern states of the US in 1988, and heavy rains and flooding through the same region in 1993.

This visualization shows the combined U and V components of wind at three different pressure levels: 850 mb, 500 mb, and 300 mb. The pressure coordinate is greatly exaggerated.

This animation was created as part of a presentation for the Nasa Center for Climate Simulation (NCCS) hyperwall display. This is a set of tiled high definition displays consisting of 5 displays across by 3 displays down. The full resolution of all combined displays is 6840 pixels accross by 2304 pixels down. For the full presentation, see the link below.

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Drought, Summer 1988    Drought, Summer 1988
Duration: 1.5 minutes
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Floods, Summer 1993    Floods, Summer 1993
Duration: 1.5 minutes
Available formats:
  1280x720   Frames
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  1280x720   MPEG-2   193 MB
  1280x720   MPEG-4   112 MB
  320x180     X-FLV       2 MB
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Animation Number:3733
Animators:Trent L. Schindler (UMBC) (Lead)
 Greg Shirah (NASA/GSFC)
 Horace Mitchell (NASA/GSFC)
Scientists:Michael Bosilovich (NASA/GSFC)
 Siegfried D. Schubert (NASA/GSFC)
Please give credit for this item to:
NASA/Goddard Space Flight Center Scientific Visualization Studio
SVS >> Climate
SVS >> Drought
SVS >> Floods
SVS >> Moisture
SVS >> Hyperwall
SVS >> For Educators
SVS >> Natural Disaster >> Fire
SVS >> Atmosphere >> Wind >> Water Vapor
SVS >> Atmosphere >> Circulation
SVS >> Climate >> Temperature
SVS >> Climate >> Precipitation
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Many of our multimedia items use the GCMD keywords. These keywords can be found on the Internet with the following citation:
Olsen, L.M., G. Major, K. Shein, J. Scialdone, S. Ritz, T. Stevens, M. Morahan, A. Aleman, R. Vogel, S. Leicester, H. Weir, M. Meaux, S. Grebas, C.Solomon, M. Holland, T. Northcutt, R. A. Restrepo, R. Bilodeau, 2013. NASA/Global Change Master Directory (GCMD) Earth Science Keywords. Version logo - the U.S. Government's official Web portal. + Privacy Policy and Important Notices
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