The thumbnails below show several years of preliminary monthly-mean tropospheric NO₂ columns retrieved from GOME. Slant columns were retrieved for the specific time period, however the air mass factor calculation in the retrieval uses monthly-mean air mass factors for 1996-97 as determined in Martin et al. [2002; 2003]. Click on the image for an enlargement. Plots of seasonal means are also available for 1995-2000. Please contact Randall Martin for the data.

July 1995	August 1995	September 1995	October 1995
November 1995	December 1995	January 1996	February 1996
March 1996	April 1996	May 1996	June 1996
July 1996	August 1996	September 1996	October 1996
November 1996	December 1996	January 1997	February 1997
March 1997	April 1997	May 1997	June 1997
July 1997	August 1997	September 1997	October 1997
November 1997	December 1997	January 1998	February 1998
March 1998	April 1998	May 1998	June 1998
July 1998	August 1998	September 1998	October 1998
November 1998	December 1998	January 1999	February 1999
March 1999	April 1999	May 1999	June 1999
July 1999	August 1999	September 1999	October 1999
November 1999	December 1999	January 2000	February 2000
March 2000	April 2000	May 2000	June 2000
July 2000	August 2000	September 2000	October 2000
November 2000	December 2000	January 2001	February 2001
March 2001	April 2001	May 2001	June 2001