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AIRS Version 5 IR-Only CO2 products released

Aqua AIRS Version 5 IR-Only Level 2 and Level 3 CO2 products are both now available

AIRS Version 5 IR-Only CO2 products released

Global average CO2 mixing ratio is displayed for the AIRS+AMSU (AIRX3C2M) and IR-Only (AIRS3C2M) monthly mean products from January 2009 through December 2012.

AIRS Version 5 IR-Only CO2 products released

Atmospheric Infrared Sounder (AIRS) Version 5 IR-Only Level 2 (AIRS2STC,AIRS2SPC) and Level 3 CO2 (AIRS3C2D, AIRS2C28, and AIRS3C2M) products are now available.

The AIRS CO2 post-processing retrieval algorithm now uses AIRS Level 2 Version 5 products as input.  Because of an increase in noise for channel 5 of the Advanced Microwave Sounding Unit (AMSU),  the yield of Level 2 data from the AIRS+AMSU algorithm declined.  Therefore, production of CO2 data derived from the AIRS+AMSU algorithm was discontinued after February 29, 2012 (DOY 60). 

Processing based on the new IR-Only algorithm commenced with data from January 2010.  The overlap in the two product types (AIRS+AMSU and IR-Only) will facilitate comparison between the two retrieval scenarios.  The AIRS Version 5 Release Tropospheric CO2 Products document (large PDF file, 13.7 MB) indicates that the IR-Only and AIRS+AMSU derived CO2 products have similar accuracy and yield over the two-year period from 2010-2011, when AMSU channel 5 was still useful.  AIRS CO2 products will continue to be produced using the Version 5 IR-Only algorithm until the Version 6 CO2 product is produced.

 

Documentation:
Documentation for AIRS Version 5 CO2 products is available on the AIRS Version 5 Documentation page.
 
Data Access:
Access methods for AIRS data are listed on the AIRS Data Holdings page.

 
 Questions or comments? Email the NASA GES DISC Help Desk: gsfc-help-disc@lists.nasa.gov

 

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Last updated: Mar 23, 2016 12:22 PM ET
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