# file: spo_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: SPO -- South Pole, Antarctica -- 89.98 S, 24.80 W, 2810 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 "spo_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 # F11ottoSPOyr F11ottoSPOmon F11ottoSPOm F11ottoSPOsd F11ottoSPOn 1995 1 263.420 0.657 1 1995 2 262.470 0.773 1 1995 3 262.510 0.775 1 1995 4 nan nan 0 1995 5 262.050 0.460 1 1995 6 nan nan 0 1995 7 262.849 0.483 2 1995 8 nan nan 0 1995 9 nan nan 0 1995 10 262.940 0.526 1 1995 11 263.500 0.454 1 1995 12 nan nan 0 1996 1 262.140 1.200 1 1996 2 nan nan 0 1996 3 nan nan 0 1996 4 262.800 0.779 1 1996 5 nan nan 0 1996 6 262.856 0.566 2 1996 7 262.730 0.936 1 1996 8 263.255 0.700 2 1996 9 262.268 0.567 2 1996 10 262.450 0.391 1 1996 11 262.690 0.375 2 1996 12 262.460 0.570 2 1997 1 262.980 0.501 1 1997 2 nan nan 0 1997 3 261.530 0.602 1 1997 4 261.488 0.464 2 1997 5 262.010 0.565 1 1997 6 261.591 0.488 2 1997 7 262.290 0.755 1 1997 8 nan nan 0 1997 9 261.960 0.436 1 1997 10 261.840 0.504 1 1997 11 nan nan 0 1997 12 261.590 0.584 1 1998 1 nan nan 0 1998 2 262.073 0.379 2 1998 3 260.854 0.453 2 1998 4 nan nan 0 1998 5 260.820 0.474 1 1998 6 260.963 0.364 2 1998 7 261.510 0.388 1 1998 8 261.100 0.399 1 1998 9 260.890 0.710 1 1998 10 260.673 0.435 2 1998 11 nan nan 0 1998 12 261.030 0.712 1 1999 1 260.810 0.439 1 1999 2 260.422 0.396 3 1999 3 260.390 0.456 1 1999 4 259.600 0.326 1 1999 5 260.200 0.806 1 1999 6 259.268 0.649 3 1999 7 259.620 0.445 1 1999 8 259.190 0.365 1 1999 9 259.120 0.245 2 1999 10 259.193 0.269 2 1999 11 259.093 0.650 2 1999 12 258.815 0.261 2 2000 1 258.661 0.799 2 2000 2 258.150 0.406 2 2000 3 257.278 1.202 2 2000 4 257.590 0.526 1 2000 5 257.260 0.327 1 2000 6 257.544 0.439 2 2000 7 257.710 0.338 1 2000 8 257.355 0.539 2 2000 9 257.940 0.382 1 2000 10 257.220 0.439 1 2000 11 257.397 0.579 2 2000 12 257.357 0.318 2 2001 1 256.800 0.322 1 2001 2 256.273 0.421 3 2001 3 256.099 0.465 2 2001 4 255.280 0.499 1 2001 5 255.830 0.362 1 2001 6 255.562 0.319 2 2001 7 255.759 0.488 2 2001 8 255.745 0.318 2 2001 9 256.080 0.381 2 2001 10 255.758 0.364 2 2001 11 255.657 0.484 3 2001 12 255.646 0.466 2 2002 1 255.832 0.543 3 2002 2 255.398 0.497 3 2002 3 254.780 0.566 2 2002 4 255.728 0.639 3 2002 5 254.143 0.516 2 2002 6 253.294 0.247 3 2002 7 253.714 0.594 2 2002 8 253.590 0.589 1 2002 9 253.590 0.572 1 2002 10 253.619 0.579 2 2002 11 253.369 0.285 2 2002 12 253.346 0.623 2 2003 1 252.466 0.458 2 2003 2 251.815 0.499 3 2003 3 251.494 0.594 2 2003 4 251.192 0.489 3 2003 5 251.397 0.293 3 2003 6 251.385 0.434 2 2003 7 251.414 0.316 3 2003 8 251.541 0.223 3 2003 9 251.406 0.346 3 2003 10 251.204 0.460 3 2003 11 251.697 0.245 2 2003 12 251.606 0.378 3 2004 1 250.982 0.349 3 2004 2 250.656 0.422 3 2004 3 250.306 0.327 3 2004 4 249.605 0.535 2 2004 5 249.179 0.418 3 2004 6 249.452 0.289 3 2004 7 249.123 0.412 2 2004 8 249.279 0.416 2 2004 9 249.269 0.366 3 2004 10 249.031 0.289 3 2004 11 249.092 0.325 3 2004 12 248.929 0.211 3 2005 1 248.537 0.381 2 2005 2 248.546 0.396 2 2005 3 247.576 0.361 3 2005 4 247.574 0.557 2 2005 5 248.173 0.847 3 2005 6 247.129 0.561 3 2005 7 247.561 0.529 3 2005 8 247.504 0.518 2 2005 9 247.334 0.368 3 2005 10 247.388 0.306 3 2005 11 246.990 0.327 3 2005 12 247.045 0.436 4 2006 1 246.584 0.293 5 2006 2 246.406 0.333 3 2006 3 246.056 0.595 3 2006 4 245.725 0.290 2 2006 5 245.549 0.285 3 2006 6 245.351 0.267 3 2006 7 245.654 0.274 3 2006 8 245.542 0.268 2 2006 9 245.546 0.531 3 2006 10 245.317 0.497 3 2006 11 245.240 0.507 3 2006 12 245.019 0.306 3 2007 1 244.658 0.461 3 2007 2 244.245 0.452 2 2007 3 244.139 0.472 3 2007 4 243.521 0.440 3 2007 5 243.266 0.371 2 2007 6 243.144 0.344 4 2007 7 243.165 0.273 3 2007 8 243.030 0.268 3 2007 9 242.940 0.376 1 2007 10 243.061 0.402 3 2007 11 243.040 0.489 3 2007 12 242.914 0.518 3 2008 1 242.691 0.416 4 2008 2 242.334 0.421 3 2008 3 241.620 0.730 2 2008 4 241.656 0.371 3 2008 5 241.176 0.393 2 2008 6 241.533 0.432 4 2008 7 241.423 0.418 2 2008 8 241.602 0.509 3 2008 9 241.257 0.424 3 2008 10 241.387 0.317 4 2008 11 241.147 0.296 3 2008 12 240.986 0.281 4 2009 1 240.532 0.459 4 2009 2 240.408 0.287 4 2009 3 239.882 0.321 3 2009 4 239.596 0.264 4 2009 5 239.147 0.502 2 2009 6 239.259 0.295 4 2009 7 239.374 0.426 3 2009 8 239.462 0.218 4 2009 9 239.415 0.262 2 2009 10 239.103 0.214 3 2009 11 239.260 0.215 4 2009 12 239.034 0.254 3 2010 1 238.866 0.447 3 2010 2 238.480 0.280 1 2010 3 237.990 0.518 1 2010 4 237.648 0.291 3 2010 5 237.688 0.351 3 2010 6 237.885 0.649 2 2010 7 237.934 0.550 3 2010 8 237.678 0.507 3 2010 9 237.360 0.507 1 2010 10 237.830 0.401 4 2010 11 237.544 0.503 3 2010 12 237.276 0.342 4 2011 1 236.944 0.334 2 2011 2 236.483 0.301 4 2011 3 236.024 0.295 3 2011 4 235.647 0.442 3 2011 5 235.730 0.443 1 2011 6 235.621 0.300 3 2011 7 235.814 0.301 3 2011 8 nan nan 0 2011 9 nan nan 0 2011 10 nan nan 0 2011 11 235.210 0.518 1 2011 12 235.025 0.483 2 2012 1 235.234 0.491 3 2012 2 234.970 0.559 4 2012 3 234.279 0.490 3 2012 4 234.330 0.450 4 2012 5 234.113 0.432 3 2012 6 nan nan 0 2012 7 233.790 0.174 1 2012 8 233.350 0.290 2 2012 9 233.222 0.564 2 2012 10 233.400 0.564 2 2012 11 233.447 0.477 2 2012 12 233.160 0.774 1 2013 1 232.380 0.605 1 2013 2 232.440 3.554 1 2013 3 232.219 0.728 2 2013 4 231.905 0.519 3 2013 5 231.706 0.554 3 2013 6 231.976 0.658 2 2013 7 231.989 1.003 3 2013 8 231.356 0.550 4 2013 9 231.298 0.411 3 2013 10 231.024 0.307 4 2013 11 231.135 0.369 2 2013 12 231.024 0.477 4 2014 1 230.721 0.747 3 2014 2 230.397 0.387 4 2014 3 230.267 0.387 3 2014 4 230.028 0.438 4 2014 5 229.732 0.211 3 2014 6 229.758 0.367 4 2014 7 230.161 0.458 2 2014 8 230.018 0.424 3 2014 9 230.071 0.350 4 2014 10 229.805 0.417 3 2014 11 229.889 0.577 2 2014 12 229.896 0.319 3 2015 1 230.170 0.468 1 2015 2 229.210 0.528 4 2015 3 229.309 0.271 3 2015 4 229.163 0.455 3 2015 5 229.110 0.472 2 2015 6 228.897 0.401 3 2015 7 228.944 0.405 2 2015 8 228.946 0.349 4 2015 9 228.860 0.688 3 2015 10 228.962 0.663 3 2015 11 228.839 0.530 2 2015 12 229.005 1.296 3 2016 1 nan nan 0 2016 2 227.734 0.785 2 2016 3 nan nan 0 2016 4 227.310 0.408 2 2016 5 227.600 0.450 1 2016 6 nan nan 0 2016 7 227.860 1.122 1 2016 8 227.068 0.498 2 2016 9 227.180 0.432 1 2016 10 226.958 0.446 2 2016 11 227.399 0.484 3 2016 12 226.780 0.504 1 2017 1 nan nan 0 2017 2 226.905 0.318 3 2017 3 226.339 0.324 2 2017 4 226.585 0.454 3 2017 5 226.080 0.445 3 2017 6 226.794 0.701 2 2017 7 226.111 0.561 3 2017 8 226.603 0.640 4 2017 9 227.103 0.403 2 2017 10 226.828 0.442 4 2017 11 227.079 0.252 3 2017 12 226.928 0.364 4 2018 1 226.310 0.425 3 2018 2 nan nan 0 2018 3 225.525 0.690 3 2018 4 225.571 0.565 4 2018 5 226.002 0.629 3 2018 6 226.094 0.597 4 2018 7 225.918 0.597 3 2018 8 225.675 0.694 4 2018 9 225.709 0.815 3 2018 10 225.708 0.711 4 2018 11 225.260 0.557 2 2018 12 225.777 0.662 4 2019 1 225.431 0.668 3 2019 2 225.282 0.438 2 2019 3 nan nan 0 2019 4 nan nan 0 2019 5 nan nan 0 2019 6 nan nan 0 2019 7 nan nan 0 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