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Author Topic: METOP IASI Global Mean Methane January to October, 2014  (Read 3694 times)

Apocalypse4Real

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METOP IASI Global Mean Methane January to October, 2014
« on: November 02, 2014, 03:44:55 AM »
After long muttering about doing this, I decided to blog the global mean methane results from collecting the METOP IASI 2-A imagery for the last couple of years.

In summary, during January to October 2014, global mean methane, as reported by the EUMETSAT METOP IASI instrument, jumped significantly above last year's readings. Global mean methane year to date, as measured by Metop 2-A IASI through October, 2014 climbed to 1807.80 ppb or 6.38 ppb above 2013.

There is more detail - dekadal and monthly data. Here is the link: http://a4rglobalmethanetracking.blogspot.com/2014/11/global-mean-methane-moves-up.html

viddaloo

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Re: METOP IASI Global Mean Methane January to October, 2014
« Reply #1 on: November 02, 2014, 05:23:30 AM »
Thanks, A4R.

PS: Do they really only keep a 3–day archive for the methane measurements? I can only find October 30th, October 31st and November 1st. How can I find October 29th?

PPS: Can these data be downloaded as CSV or similar text–based data?
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crandles

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Re: METOP IASI Global Mean Methane January to October, 2014
« Reply #2 on: November 02, 2014, 01:39:04 PM »
To put that 6.38 ppb increase in context
MLO 2005 averaged 1789.5 ppb
MLO 2013 averaged 1831.2 ppb

an increase of 41.7 over 8 years or 5.2ppb per year

Mauna Loa flask data is downloadable from
http://www.esrl.noaa.gov/gmd/dv/iadv/

which I did for above calculations:
https://docs.google.com/spreadsheets/d/1u8sfseSpUpJ1CSqvsPEVIj_veYLcvvLYr6A88y6nA4I/edit?usp=sharing

Apocalypse4Real

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Re: METOP IASI Global Mean Methane January to October, 2014
« Reply #3 on: November 02, 2014, 02:53:37 PM »
vidaloo,

There are only three days of imagery available at any time, it is not archived. There are no csv or text files of the data. To create Methanetracker, Omar Cabrera took each image and pulled the locational and CH4 reading data for each point, which was a fair amount of coding.

Crandles,

Thanks for the perspective on the historical rate increase. It is of concern. I am interested in what an El Nino will do to that rate in the coming years, if one develops. Methane increase rates have declined since 1984, but there is variability in the pattern with increases and decreases correlating with El Nino, in the WDCGG monthly data.

jai mitchell

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Re: METOP IASI Global Mean Methane January to October, 2014
« Reply #4 on: November 02, 2014, 08:13:51 PM »
To put that 6.38 ppb increase in context
MLO 2005 averaged 1789.5 ppb
MLO 2013 averaged 1831.2 ppb

an increase of 41.7 over 8 years or 5.2ppb per year

Mauna Loa flask data is downloadable from
http://www.esrl.noaa.gov/gmd/dv/iadv/

which I did for above calculations:
https://docs.google.com/spreadsheets/d/1u8sfseSpUpJ1CSqvsPEVIj_veYLcvvLYr6A88y6nA4I/edit?usp=sharing

Crandles,

Thanks for the doc,
Standard Deviation   189.1504544
don't think we get much from annual or even decadal comparisons on individual daily samples

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viddaloo

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Re: METOP IASI Global Mean Methane January to October, 2014
« Reply #5 on: November 03, 2014, 12:32:02 AM »
vidaloo,

There are only three days of imagery available at any time, it is not archived. There are no csv or text files of the data. To create Methanetracker, Omar Cabrera took each image and pulled the locational and CH4 reading data for each point, which was a fair amount of coding.

Thanks, A4R. Seems having that kind of valuable and important data and consciously throwing it out the window after only 3 days, is crazy. Or willfully ignorant. Seeing that it is the United States government doing this, we must assume it is pure evil. Any chance Omar can share or release the OCR algorithm on a Creative Commons licence?
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