>spo monthly 1983-2013

>src: ch4_spo_surface-flask_1_ccgg_month.dat

>That looks good (i.e. like the plot from NOAA, apart that the data starts at 1983 and stops in 2013)


Actually it just occurred to me that even if it looks quite similar to the Syowa data that's actually not Syowa data.
That is the station id of Syowa is syo and not spo and the data file linked to from Syowa carries the syo id. spo is south pole, which is close to syowa so no wonder that the data looks similar.

In particular if I look at ftp://aftp.cmdl.noaa.gov/data/trace_gases/ch4/flask/surface/ch4_syo_surface-flask_1_ccgg_event.txt (I still think about visualizing temps and CH4 of Syowa and Halley) I see
that the data starts in 1986 but stops already in Dec. 2007:


>SYO 2007 10 17 06 50 00 3126-99 P ch4 CCGG 1748.080 1.700 ... H4 2008 05 12 09 16 00 -69.0000 39.5750 14.00 253983
SYO 2007 11 11 10 07 00 3775-99 P ch4 CCGG 1743.680 1.700 ... H4 2008 05 12 09 59 00 -69.0000 39.5750 14.00 253978
SYO 2007 11 11 10 07 00 3776-99 P ch4 CCGG 1744.040 1.700 ... H4 2008 05 12 10 13 00 -69.0000 39.5750 14.00 253979
SYO 2007 11 19 06 25 00 2989-99 P ch4 CCGG 1744.540 1.700 ... H4 2008 05 19 14 10 00 -69.0000 39.5750 14.00 253968
SYO 2007 11 19 06 25 00 2990-99 P ch4 CCGG 1743.720 1.700 ... H4 2008 05 19 14 24 00 -69.0000 39.5750 14.00 253969
SYO 2007 12 03 06 10 00 653-99

So thats bad, because the interesting part is after 2007.