Sunday, December 7, 2014

November, 2014 Methane Moves up to New Monthly and Annual Mean Highs

Accelerated methane release through summer and fall continue to impact global methane levels for November, 2014 and year to date .

The two METOP satellites carry the IASI instrument which enables global capture of carbon dioxide (CO2) and methane (CH4) concentrations by 100 atmospheric levels, divided into 12 hour periods. They help give a broader understanding of the concentrations and distributions of these two greenhouse gases and complement the local specific readings that ground stations provide in the AGAGE, ESRL or WDCGG networks.

Metop IASI 2-A

For November 1-10, mean methane for 2-A averaged 1818.95 ppb, which was 10.57 ppb more than November 1-10, 2013.

November 11-20 saw the average mean methane reach 1816.29 ppb, which was an increase of 8.84 ppb over the same period in 2013.

November 21-30 saw a continuation of that trend, with average mean methane at 1813.35 ppb, or 8.14 ppb higher than November 21-30, 2013.

For the month, the IASI 2-A mean methane averaged 1816.20 ppb or 9.18 ppb over November, 2013. 

The year to date mean methane average moved up to 1808.70, which is 6.77 ppb above 2013's average through November 30th.

Metop IASI 1-B 

The METOP IASI 1-B readings are usually 8-10 ppb higher than those recorded by 2-A. These were not available through the NOAA OSPO until this year, so there is no comparison to 2013.

For November 1-10, mean methane for 1-B averaged 1826.21 ppb.

November 11-20 saw the average mean methane reach 1824.65 ppb.

November 21-30 had an average mean methane at 1821.50 ppb.

For the month, the IASI 1-B mean methane averaged 1824.12 ppb. 

Continuing Increases:

What continues to drive the increases seem to be the following:

Global fires, especially in wetlands.

Oil and natural gas production.

Rainfall or surface melt which triggers methogenic organisms.

In a few short days, I'll have my first data that will track two years of methane collected from the IASI imagery.



1 comment:

  1. This seems to be in keeping with October and September's totals. Certainly warranting some concern, but the methane bomb does not appear to be going off yet. Hopefully not ever