file:  RITS_global_F12.txt

Chlorofluorocarbon-12 (F12) hemispheric and global monthly means from the NOAA/ESRL 
halocarbons program.  The following data is a combined data set from two or more measurement programs.  
Weighted averages of monthly mean data are combined, interpolated, and smoothed for each sampling location.
Hemispheric and global means are estimated by cosine weighting by latitude.

(PIs) Dr. James W. Elkins, Geoffrey S. Dutton, Dr. Bradley D. Hall

National Oceanic and Atmospheric Administration (NOAA)
Earth System Research Laboratory (ESRL)
325 Broadway, R/GMD1
Boulder, CO 80305-3328

Email:  James.W.Elkins@noaa.gov; Bradley.Hall@noaa.gov; Geoff.Dutton@noaa.gov
Phone:      (303) 497-6224            (303) 497-7011         (303) 497-6086
Fax:   (303) 497-6290

This work was funded in part by the Atmospheric Chemistry Project of NOAA's Climate and Global Change Program.

Data use policy:
These data are made freely available to the public and the scientific community in the belief that their wide dissemination
will lead to greater understanding and new scientific insights. The availability of these data does not constitute publication
of the data.  NOAA relies on the ethics and integrity of the user to assure that ESRL receives fair credit for their work.  If the data 
are obtained for potential use in a publication or presentation, ESRL should be informed at the outset of the nature of this work.  
If the ESRL data are essential to the work, or if an important result or conclusion depends on the ESRL data, co-authorship
may be appropriate.  This should be discussed at an early stage in the work.  Manuscripts using the ESRL data should be sent to ESRL
for review before they are submitted for publication so we can insure that the quality and limitations of the data are accurately
represented. The PIs can discuss the quality of the data and any potential problems with its analysis.  Recent data (less
than 1.5 years) are considered preliminary.  Please contact the PIs for more information.

The data should be cited in presentations or publications as the flowing: RITS Chlorofluorocarbon-12 data from 
the NOAA/ESRL halocarbons program. 

Calibration scale used:  NOAA 2008

More information about the calibration scale can be found at: 
http://www.esrl.noaa.gov/gmd/ccl/index.html

Global monthly data are provided in parts-per-trillion, ppt. 

NOAA/GMD Halocarbon Network, 
See (http://www.esrl.noaa.gov/gmd/dv/site/site_table.html#hats_flask) more information on current
halocarbon sampling sites.

alt=Alert, North West Territories, Canada (82.5N, 62.3W) (Atmospheric Environment Service Site); 
brw=Pt. Barrow, Alaska, USA (71.3N, 156.6W) (flask and in insitu); 
lef=Wisconsin, USA, (45.6N, 90.2W) (WLEF Television tower);
nwr=Niwot Ridge, Colorado, USA (40.052N, 105.585W) (University of Colorado site)(flask and in insitu);
kum=Cape Kumukahi, Hawaii, USA (19.5N, 154.8W);
mlo=Mauna Loa, Hawaii, USA (19.5N, 155.6W)(flask and in insitu); 
smo=Cape Matatula, American Samoa (14.3S, 170.6W)(flask and in insitu); 
cgo=Cape Grim, Tasmania, Australia (40.7S, 144.8E) (CSIRO/Australia site); 
psa=Palmer Station, Antarctica (64.6S, 64.0W) -GLASS FLASKS ONLY; 
spo=South Pole (90S)(flask and in insitu);
hfm=Massachusetts, USA (42.5N, 72.2W, 340m) (Harvard University site);
mhd=Mace Head, Ireland (53N, 10W);
thd=Trinidad Head, USA (41N, 124W, 120m);
tdf=Tierra del Fuego, Ushauia, Argentina (54.8S, 68.3W, 10); 
sum=Summit, Greenland (72.6N, 38.4W, 3210m)-GLASS FLASKS ONLY (flask and in insitu);

See (http://www.esrl.noaa.gov/gmd/obop/) for station statistics and personnel.

The last column of data is a five digit binary number that lists the measurement projects used in calculating
the assimilated global mean.  A number 1 indicates data from the corresponding project was uses.
The binary number is arranged from left to right: oldGC, RITS, otto, CATS, MS

oldGC = Original flask program started in 1977 at NOAA baseline observatories, expanded to 7 sites.
RITS = In-situ program started in 1987 at 4 stations (NWR added in 1990).
otto = New flask analysis GC installed in 1995, currently 11 sample sites.
CATS = New in-situ GCs installed from 1998-2000 at 5 stations.  Summit, Greenland added in 2007.
MS = Flasks analyzed via mass spectrometry.

nan = not a number or no data, and space(s) is the delimiter.

The hemispheric and global mean error estimates are calculated using 1-standard deviation errors assigned to
the individual programs plus a systematic errors due to smoothing and interpolating.

RITS_F12_YYYY RITS_F12_MM RITS_NH_F12 RITS_NH_F12_sd RITS_SH_F12 RITS_SH_F12_sd RITS_Global_F12 RITS_Global_F12_sd RITS_F12_Programs
1987   1       nan       nan       nan       nan       nan       nan     01000
1987   2       nan       nan       nan       nan       nan       nan     01000
1987   3       nan       nan       nan       nan       nan       nan     01000
1987   4       nan       nan       nan       nan       nan       nan     01000
1987   5       nan       nan       nan       nan       nan       nan     01000
1987   6       nan       nan       nan       nan       nan       nan     01000
1987   7       nan       nan       nan       nan       nan       nan     01000
1987   8       nan       nan       nan       nan       nan       nan     01000
1987   9       nan       nan       nan       nan       nan       nan     01000
1987  10   441.397     1.520       nan       nan       nan       nan     01000
1987  11   443.222     2.976       nan       nan       nan       nan     01000
1987  12   444.009     1.158       nan       nan       nan       nan     01000
1988   1   444.700     2.089       nan       nan       nan       nan     01000
1988   2   446.026     1.614       nan       nan       nan       nan     01000
1988   3   447.414     2.182       nan       nan       nan       nan     01000
1988   4   448.291     2.229   430.718     2.211   439.504     3.140     01000
1988   5   448.900     1.974   431.623     1.424   440.261     2.434     01000
1988   6   449.926     1.845   432.472     0.645   441.199     1.954     01000
1988   7   451.737     1.496   433.920     1.647   442.829     2.225     01000
1988   8   454.257     2.041   436.050     0.952   445.153     2.252     01000
1988   9   457.269     1.765   438.662     2.079   447.966     2.727     01000
1988  10   460.256     1.296   441.565     0.837   450.911     1.543     01000
1988  11   462.653     1.684   444.442     1.254   453.548     2.100     01000
1988  12   464.364     1.756   446.851     1.178   455.607     2.115     01000
1989   1   465.651     1.747   448.467     1.595   457.059     2.366     01000
1989   2   466.983     1.858   449.394     1.887   458.189     2.648     01000
1989   3   468.686     1.498   450.256     1.371   459.471     2.031     01000
1989   4   470.277     1.816   451.439     0.842   460.858     2.002     01000
1989   5   471.180     1.715   452.614     1.314   461.897     2.161     01000
1989   6   472.008     2.112   453.680     1.245   462.844     2.452     01000
1989   7   473.823     1.604   455.051     0.660   464.437     1.734     01000
1989   8   476.663     1.644   456.789     0.574   466.726     1.741     01000
1989   9   479.595     1.922   458.611     0.549   469.103     1.999     01000
1989  10   481.824     1.082   460.300     0.857   471.062     1.381     01000
1989  11   483.418     1.195   461.741     1.148   472.579     1.657     01000
1989  12   484.695     1.625   463.086     1.571   473.890     2.261     01000
1990   1   485.387     2.129   464.561     1.115   474.974     2.404     01000
1990   2   485.158     1.892   466.150     1.203   475.654     2.242     01000
1990   3   484.599     1.990   467.682     1.199   476.140     2.323     01000
1990   4   486.553     2.055   469.008     0.918   477.780     2.250     01000
1990   5   487.469     1.397   470.192     1.337   478.831     1.934     01000
1990   6   488.671     1.395   471.370     0.578   480.020     1.510     01000
1990   7   489.824     2.057   472.688     0.855   481.256     2.228     01000
1990   8   491.188     1.950   474.373     1.113   482.780     2.246     01000
1990   9   492.887     1.206   476.271     1.516   484.579     1.937     01000
1990  10   494.434     1.577   477.990     1.154   486.212     1.954     01000
1990  11   495.478     1.318   479.487     1.363   487.482     1.896     01000
1990  12   495.973     3.230   481.002     1.355   488.487     3.503     01000
1991   1   495.954     1.381   482.597     0.711   489.275     1.553     01000
1991   2   496.121     1.756   483.769     1.795   489.945     2.511     01000
1991   3   497.057     1.043   484.161     0.664   490.609     1.236     01000
1991   4   498.270     1.242   484.328     1.377   491.299     1.854     01000
1991   5   499.205     1.352   484.848     0.877   492.027     1.611     01000
1991   6   499.868     1.446   485.653     0.485   492.761     1.525     01000
1991   7   500.305     1.550   486.625     0.625   493.465     1.671     01000
1991   8   500.595     1.518   487.807     0.637   494.201     1.646     01000
1991   9   501.229     1.900   489.117     0.720   495.173     2.032     01000
1991  10   502.487     1.050   490.381     0.571   496.434     1.195     01000
1991  11   503.826     1.380   491.498     0.909   497.662     1.652     01000
1991  12   504.768     1.269   492.637     1.214   498.703     1.756     01000
1992   1   505.464     0.847   494.127     0.995   499.795     1.307     01000
1992   2   506.072     1.013   495.690     2.022   500.881     2.262     01000
1992   3   506.628     0.934   496.727     0.705   501.677     1.170     01000
1992   4   507.327     0.794   497.337     0.814   502.332     1.137     01000
1992   5   508.282     1.088   497.960     0.466   503.121     1.184     01000
1992   6   509.327     1.333   498.781     0.630   504.054     1.474     01000
1992   7   510.358     1.161   499.820     0.382   505.089     1.222     01000
1992   8   511.349     0.857   500.940     0.532   506.144     1.009     01000
1992   9   512.005     1.407   501.924     0.691   506.964     1.567     01000
1992  10   512.227     0.793   502.748     0.616   507.488     1.004     01000
1992  11   512.442     0.963   503.631     1.026   508.036     1.407     01000
1992  12   512.803     0.868   504.534     1.564   508.668     1.789     01000
1993   1   513.075     0.874   505.136     0.776   509.106     1.169     01000
1993   2   513.295     0.941   505.567     1.231   509.431     1.549     01000
1993   3   513.692     1.079   506.011     1.197   509.851     1.611     01000
1993   4   514.319     0.845   506.200     1.115   510.260     1.399     01000
1993   5   515.062     0.832   506.214     1.526   510.638     1.738     01000
1993   6   515.822     0.996   506.539     0.750   511.180     1.247     01000
1993   7   516.623     1.011   507.367     1.137   511.995     1.522     01000
1993   8   517.480     0.896   508.436     0.981   512.958     1.329     01000
1993   9   518.421     1.006   509.268     0.970   513.844     1.397     01000
1993  10   519.399     1.169   509.819     0.866   514.609     1.455     01000
1993  11   520.066     1.145   510.558     0.913   515.312     1.465     01000
1993  12   520.277     0.941   511.560     1.046   515.919     1.407     01000
1994   1   520.424     1.131   512.443     0.753   516.434     1.358     01000
1994   2   520.805     1.040   513.031     0.766   516.918     1.291     01000
1994   3   521.326     0.880   513.399     0.622   517.363     1.078     01000
1994   4   521.862     0.951   513.594     0.896   517.728     1.307     01000
1994   5   522.466     1.015   513.714     0.849   518.090     1.323     01000
1994   6   523.321     1.152   513.976     0.812   518.648     1.409     01000
1994   7   524.345     1.524   514.472     0.818   519.409     1.730     01000
1994   8   525.146     0.946   515.219     0.980   520.183     1.362     01000
1994   9   525.674     1.100   516.200     0.536   520.937     1.224     01000
1994  10   526.088     1.258   517.113     1.027   521.600     1.624     01000
1994  11   526.268     0.929   517.618     0.634   521.943     1.124     01000
1994  12   526.176     0.709   517.852     0.917   522.014     1.160     01000
1995   1   526.033     1.018   518.292     1.568   522.162     1.869     01000
1995   2   526.059     0.811   519.038     1.224   522.549     1.468     01000
1995   3   526.416     0.809   519.716     0.604   523.066     1.010     01000
1995   4   527.058     0.618   520.169     0.546   523.614     0.825     01000
1995   5   527.769     1.034   520.562     0.575   524.166     1.183     01000
1995   6   528.524     0.808   521.011     0.595   524.768     1.004     01000
1995   7   529.437     0.985   521.528     0.472   525.483     1.092     01000
1995   8   530.401     1.244   522.044     0.485   526.223     1.336     01000
1995   9   531.143     1.070   522.562     0.472   526.853     1.169     01000
1995  10   531.522     0.957   523.124     0.482   527.323     1.072     01000
1995  11   531.622     0.871   523.705     0.602   527.664     1.059     01000
1995  12   531.620     1.223   524.390     1.037   528.005     1.604     01000
1996   1   531.618     1.558   525.180     1.009   528.399     1.856     01000
1996   2   531.657     0.959   525.726     0.569   528.692     1.115     01000
1996   3   531.737     0.849   525.834     0.656   528.785     1.073     01000
1996   4   531.918     0.801   525.806     0.831   528.862     1.154     01000
1996   5   532.322     0.767   525.951     0.495   529.136     0.912     01000
1996   6   532.890     0.803   526.254     0.391   529.572     0.894     01000
1996   7   533.459     0.907   526.624     0.455   530.042     1.014     01000
1996   8   533.934     0.813   527.037     0.412   530.485     0.911     01000
1996   9   534.293     0.941   527.502     0.454   530.898     1.045     01000
1996  10   534.580     0.797   528.107     0.640   531.343     1.022     01000
1996  11   534.822     0.714   528.829     0.559   531.826     0.906     01000
1996  12   535.002     0.565   529.482     0.529   532.242     0.775     01000
1997   1   535.046     0.957   529.959     0.777   532.502     1.233     01000
1997   2   534.927     0.641   530.304     0.639   532.616     0.905     01000
1997   3   534.767     0.687   530.517     0.995   532.642     1.209     01000
1997   4   534.715     0.794   530.532     0.431   532.623     0.904     01000
1997   5   534.912     1.218   530.501     0.519   532.706     1.324     01000
1997   6   535.393     1.034   530.697     0.604   533.045     1.197     01000
1997   7   535.980     0.819   531.115     0.477   533.548     0.948     01000
1997   8   536.581     0.816   531.559     0.443   534.070     0.929     01000
1997   9   537.132     0.932   531.901     0.442   534.517     1.032     01000
1997  10   537.490     0.988   532.096     0.429   534.793     1.077     01000
1997  11   537.704     0.882   532.229     0.414   534.966     0.974     01000
1997  12   537.891     0.866   532.487     0.659   535.189     1.089     01000
1998   1   538.107     0.916   532.817     1.373   535.462     1.650     01000
1998   2   538.437     0.775   532.938     0.912   535.687     1.197     01000
1998   3   538.842     0.835   532.794     0.966   535.818     1.276     01000
1998   4   539.182     0.759   532.653     1.010   535.917     1.264     01000
1998   5   539.423     0.912   532.772     0.426   536.097     1.006     01000
1998   6   539.634     0.936   533.091     0.427   536.363     1.029     01000
1998   7   539.839     1.047   533.474     0.481   536.656     1.152     01000
1998   8   540.084     1.024   533.956     0.684   537.020     1.231     01000
1998   9   540.377     0.891   534.522     0.938   537.449     1.293     01000
1998  10   540.549     0.778   535.005     0.804   537.777     1.119     01000
1998  11   540.608     0.998   535.244     1.160   537.926     1.531     01000
1998  12   540.696     0.897   535.343     1.410   538.020     1.671     01000
1999   1   540.908     0.610   535.612     2.004   538.260     2.095     01000
1999   2   540.568     0.626   535.971     2.036   538.269     2.131     01000
1999   3   540.641     0.882   536.099     0.838   538.370     1.216     01000
1999   4   540.735     0.612   536.130     0.901   538.433     1.089     01000
1999   5   540.841     0.744   536.371     0.670   538.606     1.001     01000
1999   6   540.999     1.075   536.832     0.460   538.915     1.169     01000
1999   7   541.288     0.979   537.337     0.889   539.312     1.322     01000
1999   8   541.692     0.830   537.724     0.873   539.708     1.205     01000
1999   9   542.072     0.992   537.999     0.563   540.035     1.141     01000
1999  10   542.288     0.491   538.340     0.664   540.314     0.826     01000
1999  11   542.372     0.593   538.822     0.798   540.597     0.994     01000
1999  12   542.407     0.437   539.268     0.831   540.838     0.939     01000
2000   1   542.427     0.487   539.500     0.729   540.963     0.877     01000
2000   2   542.477     0.469   539.542     0.826   541.009     0.950     01000
2000   3   542.625     0.496   539.624     0.461   541.125     0.677     01000
2000   4   542.861     0.860   539.385     0.372   541.123     0.937     01000