# file: mlo_N2O_MM.dat # # Nitrous Oxide (N2O) data from hourly in situ samples analyzed on # a gas chromatograph located at Mauna Loa (MLO), Hawaii # (19.539 N, 155.578 W, elevation: 3397 m). # # Atmospheric Measurements from the NOAA/ESRL Radiatively Important Trace # Species (RITS) program. The RITS program started in 1983 and continued # until 2000. A detailed history of the RITS program can be found at # http://www.esrl.noaa.gov/gmd/hats/insitu/insitu.html # # PIs: Dr. James W. Elkins, Dr. Bradley D. Hall, J. David Nance # # National Oceanic and Atmospheric Administration (NOAA) # Earth System Research Laboratory (ESRL) # 325 Broadway, R/GMD1 # Boulder, CO 80305-3328 # # See (http://www.esrl.noaa.gov/gmd/obop/) for station statistics and personnel. # # 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. We are trying to encourage scientific discussion. 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 as the flowing: # Nitrous Oxide data from the NOAA/ESRL halocarbons in situ program. # # Calibration scale used: NOAA 2006 # # More information about the calibration scale can be found at: # http://www.esrl.noaa.gov/gmd/ccl/ # # The RITS GCs sampled once per hour from the early 1990s onward. # Monthly-averaged data are provided in parts-per-billion (ppb). # # Abbreviations: # yr year # mon month # min minute # m daily/monthly median concentration (or hourly value) # sd standard deviation # n number of samples # brw Barrow, Alaska # nwr Niwot Ridge, Colorado # mlo Mauna Loa, Hawaii # smo Cape Matatula, American Samoa # spo South Pole, Antarctica # nan not-a-number (missing data) # # year, mon, concentration in ppb, std. dev, number of samples # N2OritsMLOyr N2OritsMLOmon N2OritsMLOm N2OritsMLOsd N2OritsMLOn 1987 6 306.676 1.437 52 1987 7 306.380 1.278 48 1987 8 307.142 1.235 60 1987 9 306.703 0.884 99 1987 10 306.624 0.611 150 1987 11 306.619 0.696 48 1987 12 306.555 1.673 14 1988 1 307.103 1.612 48 1988 2 306.465 1.216 113 1988 3 306.572 1.292 140 1988 4 306.754 0.991 232 1988 5 306.739 1.477 191 1988 6 306.539 1.381 158 1988 7 306.917 0.746 169 1988 8 306.752 0.840 198 1988 9 306.846 1.036 191 1988 10 307.007 0.916 200 1988 11 307.162 0.970 145 1988 12 307.230 1.270 163 1989 1 307.355 1.055 127 1989 2 307.425 0.965 82 1989 3 307.419 0.965 167 1989 4 306.337 1.616 173 1989 5 306.814 0.867 256 1989 6 307.164 0.656 315 1989 7 307.531 0.666 305 1989 8 307.820 0.654 332 1989 9 307.724 0.924 327 1989 10 308.154 0.782 320 1989 11 307.981 0.849 352 1989 12 308.144 1.135 292 1990 1 308.140 1.200 288 1990 2 308.129 0.866 237 1990 3 307.952 1.510 227 1990 4 308.027 0.726 320 1990 5 308.434 1.785 705 1990 6 308.543 2.013 547 1990 7 308.802 2.126 578 1990 8 309.018 1.947 649 1990 9 308.886 2.312 695 1990 10 308.256 1.465 460 1990 11 308.177 0.714 505 1990 12 308.295 0.878 649 1991 1 308.494 0.686 586 1991 2 308.536 0.637 554 1991 3 308.593 0.785 709 1991 4 308.627 0.626 634 1991 5 308.648 0.775 535 1991 6 308.558 0.608 667 1991 7 308.527 0.657 572 1991 8 308.573 0.585 348 1991 9 nan nan 0 1991 10 nan nan 0 1991 11 nan nan 0 1991 12 nan nan 0 1992 1 nan nan 0 1992 2 309.295 0.563 75 1992 3 309.359 0.758 517 1992 4 309.192 0.766 560 1992 5 309.284 0.738 654 1992 6 309.188 0.617 600 1992 7 309.045 0.616 675 1992 8 309.124 0.678 655 1992 9 309.099 0.648 635 1992 10 309.113 0.604 593 1992 11 309.151 0.640 642 1992 12 309.138 0.631 661 1993 1 309.099 0.778 607 1993 2 309.138 0.629 635 1993 3 309.098 0.578 640 1993 4 309.076 0.588 572 1993 5 309.075 0.620 702 1993 6 309.249 0.825 701 1993 7 309.090 0.747 593 1993 8 309.120 0.792 463 1993 9 309.298 1.012 487 1993 10 309.651 1.034 487 1993 11 309.764 0.974 583 1993 12 309.962 1.053 640 1994 1 310.070 0.996 657 1994 2 310.158 1.015 594 1994 3 310.269 1.316 666 1994 4 310.503 1.639 638 1994 5 310.399 1.501 630 1994 6 310.610 1.740 696 1994 7 310.555 1.766 517 1994 8 310.640 2.077 463 1994 9 310.311 2.375 595 1994 10 310.398 1.984 588 1994 11 310.662 1.937 600 1994 12 310.886 1.773 611 1995 1 310.789 1.613 621 1995 2 310.859 1.773 432 1995 3 310.524 3.070 652 1995 4 310.954 2.698 594 1995 5 309.679 2.873 602 1995 6 310.030 1.458 681 1995 7 309.753 1.538 708 1995 8 309.600 1.624 652 1995 9 309.393 1.561 710 1995 10 309.489 1.571 526 1995 11 311.067 2.296 600 1995 12 311.100 2.231 641 1996 1 311.123 2.107 633 1996 2 311.198 2.634 541 1996 3 311.508 2.559 712 1996 4 311.168 2.960 513 1996 5 311.911 2.940 532 1996 6 312.377 3.746 649 1996 7 312.411 4.478 550 1996 8 312.245 0.585 519 1996 9 312.290 0.558 549 1996 10 312.468 0.560 647 1996 11 312.400 0.615 630 1996 12 312.450 0.604 682 1997 1 312.459 0.560 683 1997 2 312.309 0.590 471 1997 3 312.037 0.560 328 1997 4 312.308 0.598 652 1997 5 312.220 0.631 688 1997 6 312.510 0.593 579 1997 7 312.559 0.595 701 1997 8 312.630 0.510 360 1997 9 312.268 0.600 343 1997 10 312.514 0.694 699 1997 11 312.621 0.687 670 1997 12 312.752 0.613 650 1998 1 312.809 0.651 546 1998 2 313.334 0.779 500 1998 3 313.823 0.602 559 1998 4 313.694 0.603 343 1998 5 313.793 0.617 738 1998 6 313.729 0.594 657 1998 7 313.777 0.538 740 1998 8 313.881 0.506 739 1998 9 313.989 0.643 666 1998 10 314.740 0.819 569 1998 11 314.761 0.737 217 1998 12 314.726 0.754 496 1999 1 314.849 0.735 739 1999 2 314.782 0.784 672 1999 3 314.670 0.795 423 1999 4 314.744 0.839 667 1999 5 314.947 0.795 665 1999 6 314.776 1.003 640 1999 7 313.589 0.969 731 1999 8 313.442 0.935 665 1999 9 313.462 0.944 590 1999 10 314.062 0.968 678 1999 11 314.320 1.137 620 1999 12 315.632 0.881 395 2000 1 315.717 0.967 586 2000 2 315.974 0.983 691 2000 3 315.985 0.911 695 2000 4 315.969 0.806 237