AIRS 359 hPa and IASI 600 mb CH4 - 2013

The following imagery is the methane PPBv from the 2013 AIRS/Aqua data, 45-90N latitude, as a 10 day average at 359 hPa ascending, created using Giovanni.
 
The methane mapped is that tracked in the middle troposphere at 26,045.1 feet or 7,938.6 meters.
 
 
  
 
 

 
Purple = LT 1800 PPBv
Greens = 1840-1870 PPBv
Yellows = 1870-1900 PPBv
Red = GT 1900 PPBv
 
 
 
 
 
 
 In March, 2013, the AIRS/AQUA/Giovanni withdrew CH4 reporting from its website. This column will no longer be updated after March 20, 2013
 





 
March 11-20, 2013
 
March 1-10, 2013
 
February 21-28, 2013
 
 
February 11-20, 2013
  
 
February 1-10, 2013
 
January 21-31, 2013
 
 
January 11-20, 2013
 
 
January 3-10, 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 http://www.nsof.class.noaa.gov/saa/products/welcome

 

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


NOTE: Mapped at 600 mb only

 
Dark Blue = 1780 PPBv
Dark Red = 1920 PPBv
 
 






March 11-20, 2013
 
 
 
March 1-10, 2013
 
February 21-28, 2013
 
February 11-20, 2013
 
February 1-10, 2013
 
 
January 21-31, 2013
 
January 11-20, 2013
  
January 1-10, 2013