IASI 2011-2012-2013 970-600 mb CH4 Comparison

IASI 2011
 
The following imagery has been generously provided by Dr. Leonid Yurganov, JCET Research Group, UMBC. It maps the 2011 IASI CH4 methane PPBv data as a 10 day average from 970-600 mb or from 1,201.6 feet or 366.3 meters to 13,794.9 feet or 4,204.7 meters - the lower troposhere.
 
For the science, IR processing and platform description, see this paper: http://www.atmos-chem-phys.net/9/7889/2009/acp-9-7889-2009.pdf
 
The actual alghorithm is explained in:
 
Xiong X, Barnet C, Maddy E, Wei J, Liu X, and Pagano T S (2010) Seven Years’ Observation of Mid-Upper Tropospheric Methane from Atmospheric Infrared Sounder. Remote Sens 2: 2509-2530, doi:10.3390/rs2112509
 
All IASI data are downloaded from
 

The AIRS algorithm by Xiong et al was applied to IASI without significant changes.

 

Dark Blue = 1780 PPBv

Dark Red = 1920 PPBv
 
The map record covers only select periods of June to December. Scroll down for comparisons.
 
The map labels are above the image.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
December 11-20, 2011 970-600 mb
 
 December 1-10, 2011 970-600 mb
 
November 21-30, 2011 970-600 mb
 
 November 11-20, 2011 970-600 mb
 
November 1-10, 2011 970-600 mb
 
 October 21-31, 2011 970-600 mb
 
 October 11-20, 2011 970-600 mb
 
 October 1-10, 2011 970-600 mb
 
 September 21-30, 2011 970-600 mb
 
September 11-20, 2011 970-600 mb
 
 September 1-10, 2011 970-600 mb
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
July 11-20, 2011 970-600 mb
 
July 1-10, 2011 970-600 mb
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
June 11-20, 2011 970-600 mb
 
 
 
IASI 2012
 
The following imagery has been generously provided by Dr. Leonid Yurganov, JCET Research Group, UMBC. It maps the 2012 IASI CH4 methane PPBv data as a 10 day average from 970-600 mb or from 1,201.6 feet or 366.3 meters to 13,794.9 feet or 4,204.7 meters - the lower troposhere.
 
For the science, IR processing and platform description, see this paper: http://www.atmos-chem-phys.net/9/7889/2009/acp-9-7889-2009.pdf
 
The actual alghorithm is explained in:
 
Xiong X, Barnet C, Maddy E, Wei J, Liu X, and Pagano T S (2010) Seven Years’ Observation of Mid-Upper Tropospheric Methane from Atmospheric Infrared Sounder. Remote Sens 2: 2509-2530, doi:10.3390/rs2112509
 
All IASI data are downloaded from
 
 
The AIRS algorithm by Xiong et al was applied to IASI without significant changes.
 
Dark Blue = 1780 PPBv
Dark Red = 1920 PPBv
 
The IASI imagery for 2012 is complete - scroll down for comparison.  The change in mb range does make a slight difference in comparison to prior years. 
 
The map labels are above the image.
 
 
 
December 21-30, 2012 600 mb
 
December 11-20, 2012 600 mb
 
December 1-10, 2012 600 mb
 
November 21-30, 2012 600 mb
 
 November 11-20, 2012 600 mb
 
November 1-10, 2012 600 mb
 
October 21-31, 2012 600 mb
 
October 11-20, 2012 600 mb
 
October 1-10, 2012, 600 mb
 
September 21-30, 2012 600 mb
 
 September 11-20, 2012 600 mb
 
September 1-10, 2012, 600 mb
 
August 21-30, 2012 600 mb
 
August 11-20, 2012 600 mb
 
August 1-10, 2012 600 mb
 
 July 21-31, 2012 600 mb
 
July 11-20, 2012 600 mb
 
July 1-10, 2012 600 mb
 
June 21-30, 2012 600 mb

June 11-20, 2012 600 mb
 
June 1-10, 2012 600 mb
 
May 21-31, 2012 600 mb
 
 May 11-20, 2012 600 mb
 
 May 1-10, 2012 600 mb
 
April 21-30, 2012 600 mb
 
April 11-20, 2012 600 mb
 
April 1-10, 2012 600 mb
 
March 21-30, 2012 600 mb
 
Mar 11-20, 2012 600 mb
 
Mar 1-10, 2012 600 mb
 
Feb 21-28, 2012 600 mb
 
Feb 11-20, 2012 600 mb
 
Feb 1-10, 2012 600 mb
 
Jan 21-31, 2012 600 mb
 
Jan 11-20, 2012 600 mb
 
Jan 1-10, 2012 600 mb
IASI 2013
 
The following imagery has been generously provided by Dr. Leonid Yurganov, JCET Research Group, UMBC. It maps the 2012 IASI CH4 methane PPBv data as a 10 day average from 970-600 mb or from 1,201.6 feet or 366.3 meters to 13,794.9 feet or 4,204.7 meters - the lower troposhere.
 
For the science, IR processing and platform description, see this paper: http://www.atmos-chem-phys.net/9/7889/2009/acp-9-7889-2009.pdf
 
The actual alghorithm is explained in:
 
Xiong X, Barnet C, Maddy E, Wei J, Liu X, and Pagano T S (2010) Seven Years’ Observation of Mid-Upper Tropospheric Methane from Atmospheric Infrared Sounder. Remote Sens 2: 2509-2530, doi:10.3390/rs2112509
 
All IASI data are downloaded from
 
 
The AIRS algorithm by Xiong et al was applied to IASI without significant changes.
 
Dark Blue = 1780 PPBv
Dark Red = 1920 PPBv
 
Since the IASI imagery for 2013 has not been completed - scroll down for comparison. The comparisons are based upon what Dr. Yurganov has created/made available. The change in mb range does make a slight difference in comparison to prior years.
 
The map labels are above the image.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
June 21-30, 2013 600 mb
 
June 11-20, 2013 600 mb 
 
June 1-10, 2013 600 mb 
 
May 21-31, 2013 600 mb 
 
May 11-20, 2012 600 mb 
 
May 1-10, 2013 600 mb 
 
April 21-30, 2013 600 mb 
 
April 11-20, 2013 600 mb 
 
April 1-10, 2013 600 mb  
 
March 21-30, 2013 600 mb
 
Mar 11-20, 2013 600 mb
 
Mar 1-10, 2013 600 mb
 
Feb 21-28, 2013 600 mb
 
Feb 11-20, 2013 600 mb
 
Feb 1-10, 2013 600 mb
 
Jan 21-31, 2013 600 mb - Barents Kara "Record High" CH4 - Yurganov
  
Jan 11-20, 2013 600 mb
 
Jan 1-10, 2013 600 mb