AIRS Version 6 Level 2 data represent a significant improvement over AIRS Version 5 Level 2 products in terms of greater stability, yield, and quality. Several algorithmic improvements have been made by the AIRS Project in conjunction with the AIRS Science Team. Improvements include: (a) Improved soundings of Tropospheric and Sea Surface Temperatures, day and night; (b) Improvements are larger with increasing cloud cover; (c) Improved retrievals of surface spectral emissivity, day and night; (d) Most of the spurious temperature bias trend seen in earlier versions has been removed; (e) Substantially improved retrieval yield (number of soundings accepted for output) for climate studies; (f) AIRS-Only retrievals with comparable accuracy to AIRS/AMSU retrievals; and (g) More realistic hemispheric seasonal variability and global distribution of Carbon Monoxide. Retrievals from AIRS are being used as a component of the Collaborative Climate Model and Observational Data Services (CCMODS) project to identify and correct biases in modeled physical processes occurring at many spatial or temporal scales.
Three of the significant changes for the Version 6 L3 data include:
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|AIRS Level 2 quick browse image for Jan. 7, 2013|
|A side-by-side comparison of Version 5 PCldTopStd and Version 6 PCldTop shows the improved resolution of the AIRS Cloud retrieval in Version 6 which is now at the AIRS resolution (~13 km) rather the AMSU resolution (~45 km). Source: http://disc.sci.gsfc.nasa.gov/datareleases/aqua-airs-version-6-near-real-time|
|These figures show a side-by -side comparison of AIRS NRT Version 5 (left panel) and Version 6 (right panel) total column CO converted to mixing ratio. Source: http://disc.sci.gsfc.nasa.gov/datareleases/aqua-airs-version-6-near-real-time|
National Center for Atmospheric Research Staff (Eds). Last modified 22 Feb 2017. "The Climate Data Guide: AIRS (Atmospheric InfraRed Sounder): Version 6 Level 2." Retrieved from https://climatedataguide.ucar.edu/climate-data/airs-atmospheric-infrared-sounder-version-6-level-2.