# file: nwr_N2O_MM.dat # # Nitrous Oxide (N2O) data from hourly in situ samples analyzed on # a gas chromatograph located at Niwot Ridge (NWR), Colorado # (C-1 site: 40.04 N, 105.54 W, elevation: 3018 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 # N2OritsNWRyr N2OritsNWRmon N2OritsNWRm N2OritsNWRsd N2OritsNWRn 1990 2 310.038 2.600 250 1990 3 310.113 2.097 108 1990 4 309.736 2.218 270 1990 5 308.900 1.634 330 1990 6 308.721 2.020 123 1990 7 307.460 1.615 399 1990 8 308.334 1.339 327 1990 9 308.377 1.091 365 1990 10 309.461 1.326 517 1990 11 310.040 2.038 380 1990 12 310.022 2.162 641 1991 1 310.106 1.995 686 1991 2 310.207 1.777 584 1991 3 310.021 2.566 620 1991 4 310.265 2.216 645 1991 5 309.709 1.822 528 1991 6 308.758 1.391 508 1991 7 308.642 1.301 671 1991 8 308.925 1.310 506 1991 9 309.244 1.466 474 1991 10 309.942 2.055 392 1991 11 309.983 2.316 499 1991 12 310.584 2.285 552 1992 1 310.793 2.768 456 1992 2 310.496 2.012 591 1992 3 310.869 2.048 684 1992 4 310.553 2.050 683 1992 5 310.383 1.889 623 1992 6 310.870 1.774 618 1992 7 310.954 2.159 660 1992 8 311.127 1.696 668 1992 9 310.823 1.672 628 1992 10 311.144 1.766 638 1992 11 311.428 2.186 605 1992 12 311.510 2.771 605 1993 1 311.441 2.781 622 1993 2 311.626 2.577 658 1993 3 311.774 2.422 715 1993 4 311.911 2.005 601 1993 5 311.580 1.877 687 1993 6 311.216 1.917 573 1993 7 311.317 2.166 625 1993 8 311.279 1.629 600 1993 9 310.973 1.871 647 1993 10 311.775 1.961 281 1993 11 311.465 3.149 415 1993 12 311.631 2.099 539 1994 1 311.576 2.225 602 1994 2 311.548 1.783 557 1994 3 311.544 0.863 580 1994 4 311.661 0.809 604 1994 5 311.284 1.401 362 1994 6 311.932 1.216 561 1994 7 311.949 1.049 458 1994 8 312.626 1.069 403 1994 9 312.101 0.994 578 1994 10 312.081 1.280 489 1994 11 312.152 1.762 565 1994 12 312.293 2.240 504 1995 1 312.274 2.783 688 1995 2 312.585 1.904 532 1995 3 312.454 1.821 547 1995 4 311.772 2.041 94 1995 5 312.948 2.496 607 1995 6 312.230 2.402 686 1995 7 312.205 1.830 645 1995 8 312.692 1.555 647 1995 9 312.654 1.551 632 1995 10 312.626 1.393 558 1995 11 312.977 1.931 665 1995 12 312.222 2.741 663 1996 1 311.355 2.806 639 1996 2 312.195 3.113 501 1996 3 313.199 1.401 507 1996 4 312.769 8.472 674 1996 5 313.440 10.102 500 1996 6 313.200 11.108 573 1996 7 311.072 10.357 485 1996 8 312.445 8.088 538 1996 9 313.015 4.963 469 1996 10 312.859 3.234 506 1996 11 313.305 3.603 333 1996 12 313.264 7.545 94 1997 1 313.548 6.173 546 1997 2 314.148 2.858 557 1997 3 313.908 4.477 277 1997 4 312.642 3.932 2 1997 5 313.945 1.795 275 1997 6 313.516 4.075 652 1997 7 314.298 1.920 491 1997 8 nan nan 0 1997 9 314.409 1.685 232 1997 10 314.250 3.516 454 1997 11 314.775 5.241 379 1997 12 314.562 3.709 354 1998 1 315.120 3.212 504 1998 2 315.061 2.246 632 1998 3 315.382 2.603 541 1998 4 314.662 3.201 453 1998 5 314.571 3.352 718 1998 6 314.768 3.352 667 1998 7 315.663 2.316 626 1998 8 315.892 3.377 467 1998 9 316.225 3.508 630 1998 10 315.932 5.280 619 1998 11 315.785 3.612 575 1998 12 316.046 5.964 729 1999 1 315.778 5.325 626 1999 2 315.723 4.685 581 1999 3 315.911 6.382 526 1999 4 316.305 4.375 548 1999 5 315.903 3.059 664 1999 6 317.306 8.841 696 1999 7 317.251 6.517 599 1999 8 316.792 4.429 631 1999 9 316.825 3.578 539 1999 10 316.534 2.508 657 1999 11 316.359 3.932 581 1999 12 316.203 4.023 399 2000 1 316.200 3.456 692 2000 2 316.538 4.309 672 2000 3 316.347 4.301 676 2000 4 317.359 4.451 697 2000 5 319.348 3.840 257 2000 6 nan nan 0 2000 7 nan nan 0 2000 8 317.717 2.765 349 2000 9 319.101 6.135 689 2000 10 319.707 5.577 676 2000 11 320.199 5.879 709 2000 12 319.221 3.951 697 2001 1 318.411 3.815 658 2001 2 317.076 3.136 600 2001 3 317.717 2.704 630 2001 4 317.395 3.031 572 2001 5 317.478 2.009 596 2001 6 317.404 2.756 640 2001 7 317.755 1.674 703 2001 8 318.270 1.657 154