|Jul-14||Jul-13||Variance 2014 vs 2013|
At first glance, this seems a major drop from the readings over 401 ppm for the last three months. However a different perspective - the global IASI imagery - reveals that global CO2 remains over 400 ppm in many areas.
To illustrate, here is the July 31, 2014 Metop 1-B 12-24 hrs image for 972 mb.
Areas in purple to pink are 400-410 ppm.
Areas in yellow are over 420 ppm.
NOAA/OSPO does not provide the actual high readings for each cell. Note that global mean for this time and altitude is 402 ppm, significantly above the monthly averages noted above, or the preliminary 397.63 ppm reported by NOAA/ESRL for Mauna Loa on July 31st, 2014
NOAA/ESRL and Scripps Monthly data: http://co2now.org/
Daily Scripps: https://scripps.ucsd.edu/programs/keelingcurve/
NOAA/ESRL Daily: http://www.esrl.noaa.gov/gmd/ccgg/trends/weekly.html