# file: sum_F11_MM.dat # # Atmospheric measurements of CCl3F (CFC-11, Chlorofluorocarbon-11, F11) # # Measurements are from the NOAA/ESRL/GMD/HATS flask program # (http://www.esrl.noaa.gov/gmd/hats/flask/flasks.html). # Instrument ID: Otto # # Location: SUM -- Summit, Greenland -- 72.58 N, 38.48 W, 3217.54 m Elev. # See http://www.esrl.noaa.gov/gmd/dv/site/site_table.html#hats_flask for # more information about flask sampling sites. # # The data reported are from samples collected approximately once per week in # matching, concurrent, flask pairs and later analyzed on a gas chromatograph # with electron capture detection (GC-ECD) located in Boulder, Colorado, USA. # This system uses two standard reference gases for calibration and has been # in operation since very early in 1995. # # These data represent monthly mean estimates computed using those data marked # with a 0 in flag column 7 of the companion file named "sum_F11_All.dat". With # flask samples collected only weekly on average, monthly sampling statistics # are poor at best. As a result, the error reported is either the standard # deviation of the mean or a floor single-sample precision estimate. # # PIs: Dr. James W. Elkins, Dr. Bradley D. Hall, # Debra J. Mondeel, J. David Nance # # 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 # Phone: (303) 497-6224 (303) 497-7011 # # Email: Debra.J.Mondeel@noaa.gov; David.Nance@noaa.gov # Phone: (303) 497-6013 (303) 497-7002 # # Fax: (303) 497-6290 # # Data use policy: # If you use this data in a publication or report, we would appreciate that you # contact the principal investigators (PIs) first and discuss your interests. # The PIs can discuss the quality of the data and any potential problems with # its analysis. Please contact the PIs for more information. The data should # be cited in presentations or publications along the following lines: CFC-11 # data from the NOAA/ESRL halocarbons flask program. # # Calibration scale: NOAA 2016 # See http://www.esrl.noaa.gov/gmd/ccl/scales.html for more information about # calibration scales. # # Units: ppt # # Missing value: "nan" # # Data Columns: # yr Year # mon Month # m Monthly mean concentration of F11 in ppt # sd Standard deviation of the mean (or single-sample precision value) # n Number of samples # F11ottoSUMyr F11ottoSUMmon F11ottoSUMm F11ottoSUMsd F11ottoSUMn 2004 1 nan nan 0 2004 2 nan nan 0 2004 3 nan nan 0 2004 4 nan nan 0 2004 5 nan nan 0 2004 6 251.440 0.643 2 2004 7 251.419 0.361 2 2004 8 251.160 0.220 1 2004 9 251.277 0.481 2 2004 10 251.248 0.474 2 2004 11 251.503 0.411 3 2004 12 251.280 0.405 2 2005 1 251.429 0.377 2 2005 2 251.127 0.549 2 2005 3 251.321 0.370 2 2005 4 nan nan 0 2005 5 250.596 0.438 2 2005 6 250.196 0.295 2 2005 7 nan nan 0 2005 8 249.455 0.498 3 2005 9 nan nan 0 2005 10 249.176 0.794 2 2005 11 249.402 0.481 2 2005 12 249.670 0.795 1 2006 1 249.571 0.485 2 2006 2 249.701 0.482 2 2006 3 248.550 1.568 1 2006 4 248.760 0.534 1 2006 5 248.986 0.358 4 2006 6 247.857 0.580 3 2006 7 nan nan 0 2006 8 246.914 0.615 2 2006 9 246.900 0.600 1 2006 10 247.280 0.597 2 2006 11 247.820 0.443 1 2006 12 247.490 0.439 2 2007 1 247.432 0.438 2 2007 2 246.931 0.599 2 2007 3 246.814 0.576 2 2007 4 nan nan 0 2007 5 246.420 0.496 1 2007 6 245.791 0.615 2 2007 7 244.719 0.456 2 2007 8 244.786 0.317 4 2007 9 244.997 0.460 5 2007 10 245.094 0.430 2 2007 11 245.254 0.633 2 2007 12 244.473 0.608 2 2008 1 244.784 0.742 2 2008 2 244.547 0.477 2 2008 3 244.094 0.501 2 2008 4 244.083 0.657 2 2008 5 243.904 0.618 2 2008 6 243.258 0.280 6 2008 7 242.573 0.275 4 2008 8 242.642 0.355 3 2008 9 242.872 0.450 2 2008 10 242.900 0.448 2 2008 11 243.310 0.634 1 2008 12 243.307 0.337 2 2009 1 242.854 0.317 2 2009 2 242.770 0.339 1 2009 3 242.250 0.407 1 2009 4 241.770 0.304 1 2009 5 241.507 0.658 2 2009 6 241.300 0.405 1 2009 7 240.778 0.421 3 2009 8 241.099 0.319 5 2009 9 240.988 0.398 4 2009 10 241.114 0.349 2 2009 11 241.571 0.362 2 2009 12 241.601 0.382 2 2010 1 241.017 0.341 2 2010 2 241.090 0.366 2 2010 3 240.601 0.247 2 2010 4 240.428 0.251 2 2010 5 239.742 0.285 2 2010 6 239.326 0.672 2 2010 7 238.912 0.330 3 2010 8 238.704 0.431 4 2010 9 238.546 0.312 4 2010 10 238.835 0.443 2 2010 11 239.470 0.452 2 2010 12 239.232 0.451 2 2011 1 238.807 0.322 2 2011 2 238.699 0.305 2 2011 3 238.623 0.374 2 2011 4 238.187 0.381 2 2011 5 238.164 0.382 2 2011 6 237.865 0.554 2 2011 7 237.159 0.405 4 2011 8 236.753 0.650 3 2011 9 236.851 0.350 4 2011 10 237.410 0.597 1 2011 11 237.530 0.655 1 2011 12 237.399 0.448 2 2012 1 237.520 0.566 2 2012 2 237.080 0.279 1 2012 3 236.833 0.325 2 2012 4 236.030 0.515 1 2012 5 236.373 0.412 2 2012 6 235.630 0.477 1 2012 7 235.299 0.377 3 2012 8 nan nan 0 2012 9 nan nan 0 2012 10 nan nan 0 2012 11 nan nan 0 2012 12 nan nan 0 2013 1 nan nan 0 2013 2 nan nan 0 2013 3 nan nan 0 2013 4 nan nan 0 2013 5 nan nan 0 2013 6 nan nan 0 2013 7 nan nan 0 2013 8 nan nan 0 2013 9 nan nan 0 2013 10 233.440 0.489 1 2013 11 233.912 0.296 2 2013 12 233.962 0.264 3 2014 1 233.900 0.264 1 2014 2 233.423 0.619 2 2014 3 233.083 0.298 2 2014 4 233.330 0.692 2 2014 5 233.165 0.359 2 2014 6 232.570 0.334 2 2014 7 232.664 0.320 5 2014 8 232.922 0.445 3 2014 9 233.091 0.417 4 2014 10 233.282 0.629 2 2014 11 233.872 0.424 2 2014 12 233.801 0.329 2 2015 1 233.391 0.398 2 2015 2 233.482 0.431 2 2015 3 232.601 0.430 2 2015 4 232.200 1.018 1 2015 5 232.255 0.746 2 2015 6 nan nan 0 2015 7 231.045 0.495 2 2015 8 230.855 0.622 5 2015 9 231.491 1.936 3 2015 10 231.529 1.860 2 2015 11 231.902 1.837 2 2015 12 232.080 1.879 1 2016 1 231.512 1.832 2 2016 2 231.190 1.446 1 2016 3 nan nan 0 2016 4 nan nan 0 2016 5 nan nan 0 2016 6 230.270 1.209 1 2016 7 229.850 1.294 1 2016 8 229.720 0.464 1 2016 9 230.246 0.459 3 2016 10 230.419 0.551 2 2016 11 230.950 0.476 1 2016 12 230.234 1.075 2 2017 1 230.666 0.465 2 2017 2 230.550 0.538 1 2017 3 229.510 0.592 1 2017 4 229.830 0.596 1 2017 5 229.334 0.799 2 2017 6 229.576 0.542 2 2017 7 230.098 0.359 2 2017 8 229.699 0.440 5 2017 9 229.916 0.429 4 2017 10 230.150 0.597 1 2017 11 231.140 0.657 1 2017 12 230.598 0.322 2 2018 1 230.181 0.349 2 2018 2 230.360 0.443 1 2018 3 229.714 0.725 2 2018 4 229.659 0.549 2 2018 5 229.620 0.409 1 2018 6 nan nan 0 2018 7 228.661 0.406 3 2018 8 228.465 0.494 5 2018 9 228.705 0.605 4 2018 10 229.170 0.446 1 2018 11 229.360 0.449 1 2018 12 229.280 0.411 2 2019 1 229.430 0.448 2 2019 2 228.775 0.389 2 2019 3 228.737 0.616 2 2019 4 228.433 0.695 2 2019 5 228.097 0.563 2 2019 6 227.382 0.429 3 2019 7 227.000 0.661 1 2019 8 nan nan 0 2019 9 nan nan 0 2019 10 nan nan 0 2019 11 nan nan 0 2019 12 nan nan 0