78 1001 ELKINS, JAMES; WAMSLEY, PAULA; HURST, DALE; ROMASHKIN, PAVEL; DUTTON, GEOFF U.S. DEPT OF COMMERCE, NOAA / CMDL / NITROUS OXIDE AND HALOCOMPOUNDS DIVISION ACATS ASHOE/MAESA 1 1 1994 03 20 1998 08 07 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) 56 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. To calculate HCFC-22 ALIAS CH4 was used. ACATS did not measure SF6 on this flight. Mean age of air cannot be calculated. ACATS did not measure CH3CCl3. A derived CH3CCl3 from CFC-11 correlation is used in place. 1 GMTs Age TotalBr CBry Bry TotalCl CCly Cly 68070 9999.00 9999.000 9999.000 9999.000 9999.000 9999.000 9999.000 68250 9999.00 9999.000 9999.000 9999.000 9999.000 9999.000 9999.000 68610 9999.00 9999.000 9999.000 9999.000 9999.000 9999.000 9999.000 68790 9999.00 9999.000 9999.000 9999.000 9999.000 9999.000 9999.000 69150 9999.00 9999.000 9999.000 9999.000 9999.000 9999.000 9999.000 69330 9999.00 9999.000 9999.000 9999.000 9999.000 9999.000 9999.000 69690 9999.00 9999.000 9999.000 9999.000 9999.000 9999.000 9999.000 69870 9999.00 9999.000 9999.000 9999.000 9999.000 9999.000 9999.000 70230 9999.00 9999.000 9999.000 9999.000 9999.000 9999.000 9999.000 70410 9999.00 9999.000 9999.000 9999.000 9999.000 9999.000 9999.000 70770 9999.00 9999.000 9999.000 9999.000 9999.000 9999.000 9999.000 70950 9999.00 9999.000 9999.000 9999.000 9999.000 9999.000 9999.000 71310 9999.00 9999.000 9999.000 9999.000 9999.000 9999.000 9999.000 71490 9999.00 9999.000 9999.000 9999.000 9999.000 9999.000 9999.000 71850 9999.00 9999.000 9999.000 9999.000 9999.000 9999.000 9999.000 72030 9999.00 9999.000 9999.000 9999.000 9999.000 9999.000 9999.000 72390 9999.00 9999.000 9999.000 9999.000 9999.000 9999.000 9999.000 72570 9999.00 9999.000 9999.000 9999.000 9999.000 9999.000 9999.000 72930 9999.00 9999.000 9999.000 9999.000 9999.000 9999.000 9999.000 73110 9999.00 9999.000 9999.000 9999.000 9999.000 9999.000 9999.000 73470 9999.00 9999.000 9999.000 9999.000 9999.000 9999.000 9999.000 73650 9999.00 9999.000 9999.000 9999.000 9999.000 9999.000 9999.000 74010 9999.00 9999.000 9999.000 9999.000 9999.000 9999.000 9999.000 74190 9999.00 9999.000 9999.000 9999.000 9999.000 9999.000 9999.000 74550 9999.00 9999.000 9999.000 9999.000 9999.000 9999.000 9999.000 74730 9999.00 9999.000 9999.000 9999.000 9999.000 9999.000 9999.000 75090 9999.00 9999.000 9999.000 9999.000 9999.000 9999.000 9999.000 75270 9999.00 9999.000 9999.000 9999.000 9999.000 9999.000 9999.000 75630 9999.00 9999.000 9999.000 9999.000 9999.000 9999.000 9999.000 75810 9999.00 9999.000 9999.000 9999.000 9999.000 9999.000 9999.000 76170 9999.00 9999.000 9999.000 9999.000 9999.000 9999.000 9999.000 76350 9999.00 9999.000 9999.000 9999.000 9999.000 9999.000 9999.000