The data contained in this folder is associated to the paper "The recent increase of atmospheric methane from 10 years of ground-based NDACC FTIR observations since 2005."
Files containing daily mean FTIR observations and GEOS-Chem total columns time series (concurrent days) are named XXX_TC.csv

where XXX is the station code.

Unit of total columns is molecules/cm²

Station codes :
EUR - Eureka, Canada, 80.05°N, -86.42°E, 610 m a.s.l.
KIR - Kiruna, Sweden, 67.84°N, 20.39°E, 420 m a.s.l.
ZUG - Zugspitze, Germany, 47.42°N, 10.98°E, 2954 m a.s.l.
JFJ - Jungfraujoch, Switzerland, 46.55°N, 7.98°E, 3580 m a.s.l.
TOR - Toronto, Canada, 43.66°N, -79.4°E, 174 m a.s.l.
TSU - Tsukuba, Japan, 36.05°N, 140.12°E, 31 m a.s.l.
IZA - Izaña, Spain, 28.29°N, -16.48°E, 2370 m a.s.l.
WOL - Wollongong, Australia, -34.41°N, 150.88°E, 31 m a.s.l.
LAU - Lauder, New Zealand, -45.04°N, 169.68°E, 370 m a.s.l.
AHT - Arrival heights, New Zealand, -77.83°N, 166.65°E, 200 m a.s.l.

Files containing seasonally smoothed GEOS-Chem tagged total columns time series are named XXX_GCT.csv where XXX is the station code.

Tracer codes : 
tot - total methane
bb - biomass burning
bf - biofuel
co - coal
ef - livestock
ga - gas and oil
oa - other anthropogenic
on - other natural
ri - rice
sa - soil absorption (sink)
wa - waste
wl - wetlands

The authors of this paper should be notified for potential use of these data in a publication or presentation.

Please reference these data as 

Bader, W., Bovy, B., Conway, S., Strong, K., Smale, D., Turner, A. J., Blumenstock, T., Boone, C., Collaud Coen, M.,
Coulon, A., Garcia, O., Griffith, D. W. T., Hase, F., Hausmann, P., Jones, N., Krummel, P., Murata, I., Morino, I.,
Nakajima, H., O'Doherty, S., Paton-Walsh, C., Robinson, J., Sandrin, R., Schneider, M., Servais, C., Sussmann, R., and Mahieu, E.:
The recent increase of atmospheric methane from 10 years of ground-based NDACC FTIR observations since 2005,
Atmos. Chem. Phys., 17, 2255-2277, doi:10.5194/acp-17-2255-2017, 2017.