74 1001 ELKINS, JAMES; WAMSLEY, PAULA; HURST, DALE; ROMASHKIN, PAVEL; DUTTON, GEOFF U.S. DEPT OF COMMERCE, NOAA / CMDL / NITROUS OXIDE AND HALOCOMPOUNDS DIVISION ACATS STRAT 1 1 1996 02 12 1998 07 23 0 ELAPSED TIME IN SECONDS FROM 00:00:00 GMT ON SAMPLE DATE 7 1.0 1.0 1.0 1.0 1.0 1.0 1.0 9999.00 9999.000 9999.000 9999.000 9999.000 9999.000 9999.000 Mean Age of Air (year) Total Br (ppt) Total Organic Br (ppt) Total Inorganic Br (ppt) Total Cl (ppb) Total Organic Cl (ppb) Total Inorganic Cl (ppb) 52 Total chlorine and bromine are based on in situ measurements of organic species from either the Airborne Chromatograph for Atmospheric Trace Species (ACATS-IV) [see Elkins et al., 1996] or the Lightweight Airborne Chromatograph Experiment (LACE). Mean age of the air in years from the tropical tropopause is calculated using tropospheric trends from Geller et al., [1997] and a formula from Volk et al., [1997]. Total chlorine calculations are based on total chlorine from Montzka et al., [1996] and model generated correlations from Woodbridge et al. [1995] are used for the missing chlorine species, HCFC-22 and CH3Cl. Total bromine calculations are from Wamsley et al., [1997] where missing bromine organic species (CH3Br, halon-2402, halon-1301, CH2Cl2, and CH2BrCl) are calculated from correlations of NCAR WAS data versus CFC-11 are used. All values derived from theta < 380 were excluded, because of influence from the troposphere. All calculations of total halogen and inorganic halogen assume no inorganic input from the troposphere (Cly, Bry=0). References: Elkins, J. W., D. W. Fahey, J. M. Gilligan, G. S. Dutton, T. J. Baring, C. M. Volk, R. E. Dunn, R. C. Myers, S. A. Montzka, P. R. Wamsley, A. H. Hayden, J. H. Butler, T. M. Thompson, T. H. Swanson, E. J. Dlugokencky, P. C. Novelli, D. F. Hurst, J. M. Lobert, S. J. Ciciora, R. J. McLaughlin, T. L. Thompson, R. H. Winkler, P. J. Fraser, L. P. Steele and M. P. Lucarelli, Airborne gas chromatograph for in situ measurements of long-lived species in the upper troposphere and lower stratosphere, Geophysical Research Letters, 23, 347-350, 1996 Geller, L. S., J. W. Elkins, J. M. Lobert, A. D. Clarke, D. F. Hurst, J. H. Butler and R. C. Myers, Tropospheric SF6: Observed latitudinal distribution and trends, derived emissions and interhemispheric exchange time, Geophysical Research Letters, 24, 1997. Montzka, S.A., J.H. Butler, R.C. Myers, T.M. Thompson, T.H. Swanson, A.D. Clarke, L.T. Lock, J.W. Elkins, Decline in the tropospheric abundance of halogen from halocarbons: Implications for stratospheric ozone depletion., Science, 272, 1318-1322, 1996. Volk, C. M., J. W. Elkins, D. W. Fahey, G. S. Dutton, J. M. Gilligan, M. Loewenstein, J. R. Podolske, K. R. Chan, and M. R. Gunson, Evaluation of source gas lifetimes from stratospheric observations, Journal of Geophysical Research, 102, 25543-64,1997. Wamsley, P. R., J. W. Elkins, D. W. Fahey, G. S. Dutton, C. M. Volk, R. C. Myers, S. A. Montzka, J. H. Butler, A. D. Clarke, P. J. Fraser, L. P. Steele, M. P. Lucarelli, E. L. Atlas, S. M. Schauffler, D. R. Blake, F. S. Rowland, W. T. Sturges, J. M. Lee, S. A. Penkett, A. Engel, R. M. Stimpfle, K. R. Chan, D. K. Weisenstein, M. K. W. Ko and R. J. Salawitch, Distribution of halon-1211 in the upper troposphere and lower stratosphere and the 1994 total bromine budget, Journal of Geophysical Research, 103, 1513-26, 1998. Woodbridge, E. L., J. W. Elkins, D. W. Fahey, L. E. Heidt, S. Solomon, T. J. Baring T. M. Gilpin, W. H. Pollock, S. M. Schauffler, E. L. Atlas, M. Loewenstein, J. R. Podolske, C. R. Webster, R. D. May, J. M. Gilligan, S. A. Montzka, K. A. Boering and R. J. Salawitch, Estimates of total organic and inorganic chlorine in the lower stratosphere from in situ and flask measurements, Journal of Geophysical Research, 100, 3057-3064, 1995. 1 GMTs Age TotalBr CBry Bry TotalCl CCly Cly 71826 9999.00 9999.000 9999.000 9999.000 9999.000 9999.000 9999.000 72006 9999.00 9999.000 9999.000 9999.000 9999.000 9999.000 9999.000 72186 9999.00 9999.000 9999.000 9999.000 9999.000 9999.000 9999.000 72366 9999.00 9999.000 9999.000 9999.000 9999.000 9999.000 9999.000 72726 -0.20 18.897 20.037 -1.140 3.536 3.457 0.078 72906 -0.24 18.909 20.030 -1.122 3.534 3.508 0.026 73086 -0.07 18.863 19.847 -0.984 3.541 3.479 0.061 73266 -0.09 18.869 19.417 -0.548 3.540 3.461 0.078 73626 -0.06 18.861 19.242 -0.381 3.541 3.458 0.083 73806 -0.29 18.919 19.342 -0.422 3.532 3.449 0.084 73986 -0.22 18.901 19.918 -1.016 3.535 3.491 0.044 74166 -0.24 18.908 19.395 -0.487 3.534 3.440 0.094 74526 0.20 18.793 19.172 -0.379 3.550 3.407 0.143 74706 1.16 18.530 14.504 4.027 3.572 3.060 0.512 74886 1.52 18.426 12.867 5.559 3.576 2.884 0.692 75066 2.01 18.283 11.832 6.450 3.578 2.765 0.813 75426 2.02 18.278 11.816 6.462 3.578 2.784 0.794 75606 1.85 18.329 11.901 6.428 3.578 2.777 0.801 75786 1.50 18.432 13.259 5.173 3.576 9999.000 9999.000 76326 2.34 18.184 11.462 6.722 3.577 9999.000 9999.000 76506 1.85 18.331 12.375 5.956 3.578 9999.000 9999.000 76686 2.05 18.272 11.893 6.378 3.578 9999.000 9999.000 76866 2.34 18.184 10.927 7.257 3.577 9999.000 9999.000 77226 3.27 17.892 8.386 9.506 3.564 9999.000 9999.000 77406 3.03 17.968 8.748 9.220 3.568 9999.000 9999.000 77586 3.67 17.764 7.357 10.407 3.553 9999.000 9999.000 78126 3.39 17.853 7.991 9.863 3.561 9999.000 9999.000 78306 3.63 17.774 7.424 10.351 3.554 9999.000 9999.000 78486 3.24 17.903 8.209 9.694 3.564 9999.000 9999.000 78666 2.92 18.004 9.246 8.758 3.570 9999.000 9999.000 79026 2.94 17.996 9.186 8.810 3.570 9999.000 9999.000 79386 3.05 17.963 8.896 9.067 3.568 9999.000 9999.000 79566 3.44 17.837 8.454 9.383 3.559 9999.000 9999.000 79926 9999.00 9999.000 9999.000 9999.000 9999.000 9999.000 9999.000 80106 9999.00 9999.000 9999.000 9999.000 9999.000 9999.000 9999.000 80286 9999.00 9999.000 9999.000 9999.000 9999.000 9999.000 9999.000 80466 9999.00 9999.000 9999.000 9999.000 9999.000 9999.000 9999.000