file: tot_cl.dat | Measure of the chlorine (Cl), equivalent chlorine (ECl), and effective equivalent chlorine (EECl) burden of the lower atmosphere from the National Oceanic and Atmospheric Administration/Climate Monitoring and Diagnostics Laboratory Flask Program and In Situ Measurements Program. | Monthly means were compiled for the hemispheric abundance of Cl, ECl, and EECl in the lower atmosphere from: | 1) measurements of CFC-11, CFC-12, CH3CCl3, and CCl4 from gas chromatographs located at 4 or 5 remote locations (BRW, NWR, MLO, SMO, SPO; see below for key to abbreviations) equipped with electron-capture detectors | and | 2) measurements of Halon-1211, Halon-1301, HCFC-22, HCFC-142b, HCFC-141b, HFC-134a from flasks sampled at 7 remote locations and analyzed by gas chromatography with mass spectrometry or electron-capture detection. | All data were weighted by the cosine of sampling latitude before hemispheric monthly means were estimated. | Monthly means were then weighted by the appropriate factors (# of chlorine atoms per molecule, etc.) and summed to arrive at the summed abundance of Cl, ECl, and EECl. | | Stephen A. Montzka, James W. Elkins, James H. Butler, Thayne M. Thompson, and Richard C. Myers | National Oceanic and Atmospheric Administration (NOAA) Climate Monitoring and Diagnostics Laboratory (CMDL) 325 Broadway, Mail Stop R/E/CG1 Boulder, CO 80303 U.S.A. Internet e-mail address: smontzka@cmdl.noaa.gov; jelkins@cmdl.noaa.gov; jbutler@cmdl.noaa.gov; rmyers@cmdl.noaa.gov Phone: sam: (303) 497-6657; jwe: (303) 497-6224; jhb: (303) 497-6898 rcm: (303) 497-7061 FAX: (303) 497-6290 | T. H. Swanson, A. D. Clarke, L. T. Lock | Cooperative Institute for Research in the Environmental Sciences (CIRES); University of Colorado Boulder, C0 80309 U.S.A. Internet e-mail address: aclarke@cmdl.noaa.gov; Phone: (303) 497-6013 FAX: (303) 497-6290 | Daniel J. Endres | National Oceanic and Atmospheric Administration (NOAA) NOAA/CMDL--Point Barrow Observatory Pouch 8888 Barrow, AK 99723 U.S.A. Phone: (907) 852-6500 FAX: (907) 852-4622 | Alan M. Yoshinaga, Russell C. Schnell | National Oceanic and Atmospheric Administration (NOAA) NOAA/CMDL Mauna Loa Observatory P.O. Box 275 Hilo, HI 96720 U.S.A. Phone: (808) 961-3788 FAX: (808) 961-3789 | Mark Winey | National Oceanic and Atmospheric Administration (NOAA) NOAA/CMDL Samoa Observatory Pago Pago, American Samoa 96799 U.S.A. Phone: 011 (684) 622-7455 FAX: 011 (684) 699-4440 | Bernard G. Mendonca | National Oceanic and Atmospheric Administration (NOAA) c/o NOAA/CMDL South Pole Observatory (Relayed messages through CMDL Boulder) 325 Broadway Boulder, CO 80303 U.S.A. Phone: (303) 497-6733 FAX: (303) 497-6290 Internet e-mail address: bmendonca@cmdl.noaa.gov | Mark V. Losleben | University of Colorado Mountain Research Station (MRS) 818 County Rd 116 Nederland, CO 80466 U.S.A. Phone: (303) 492-8841 FAX: (303) 492-6388 Internet e-mail address: losleben_m@cubldr.colorado.edu | Neil B. A. Trivett, Doug E. J. Worthy, Victoria Hudec, and Valerie Chorney | Atmospheric Environment Service (AES) 4605 Dufferin Street Downsview, Ontario M3H 5T4, Canada Phone: (416) 739-4462 FAX: (416) 739-4664 Internet e-mail address: arqmgen@cid.aes.doe.ca | Paul J. Fraser | Division of Atmospheric Research (DAR) Commonwealth Scientific and Industrial Research Organization (CSIRO) Private Bag No. 1, Mordialloc Victoria 3195, Australia Phone: 011 (613) 586-7666 FAX: 011 (613) 586-7600 Internet e-mail address: pjf@atmos.dar.csiro.au | Laurence W. Porter | Cape Grim Baseline Air Pollution Station (CGBAPS) P.O. Box 346 Smithton, Tasmania 7330, Australia Phone: 011 61 04 521629 FAX: 011 61 04 522600 Internet e-mail address: /G=GRIM/S=BAPS/O=MET.BUREAU/@telememo.au | ******************************************************** If you use this data in a publication or report, NOAA and CDIAC policy requires that you contact the principal investigators first and discuss your interests. By including this data here in electronic form, we are trying to encourage scientific interaction. Furthermore, if you use the data in any presentation or publication, you must give credit to the National Oceanic and Atmospheric Administration (NOAA)/Climate Monitoring and Diagnostics Laboratory (CMDL) in Boulder, CO as a source of the data. | For more information, see the article in which this summary data was published: | S. A. Montzka, J. H. Butler, R. C. Myers, T. M. Thompson, T. H. Swanson, A. D. Clarke, L. T. Lock, and J. W. Elkins, Decline in the tropospheric abundance of halogen from halocarbons: Implications for stratospheric ozone depletion, Science, 272, 1318-1322, 1996. | ******************************************************** NOAA/CMDL Halocarbon Flask Network, ppt=parts per trillion by mole fraction for flask pair or individual flask ALT=Alert, North West Territories, Canada (82.5N, 62.3W) (Atmospheric Environment Service Site); BRW=Pt. Barrow, Alaska, USA (71.3N, 156.6W); NWR= Niwot Ridge, Colorado, USA (40.052N, 105.585W) (University of Colorado site); MLO=Mauna Loa, Hawaii, USA (19.5N, 155.6W); SMO=Cape Matatula, American Samoa (14.3S, 170.6W); CGO=Cape Grim, Tasmania, Australia (40.7S, 144.8E) (CSIRO/Australia site); SPO=South Pole (90S); | Principal Investigators: Steve Montzka NOAA/CMDL (303) 497-6657 or Jim Elkins NOAA/CMDL (303) 497-6224 or Jim Butler (303) 497-6898. Internet E-mail address: smontzka@cmdl.noaa.gov, jelkins@cmdl.noaa.gov, jbutler@cmdl.noaa.gov | most recent update to this file occurred on 5/24/96 | Reported mixing ratios are dry mole fraction in parts per trillion (ppt) | Chlorine from the following halocarbons: CFC-11, CFC-12, CFC-113 CH3CCl3, CCl4 Halon-1301, Halon-1211 HCFC-22, HCFC-142b, HCFC-141b HFC-134a | Effective Equivalent Chlorine (EECl) from the halocarbons listed above: fraction release for CFC-11 = 0.8 alpha for bromine = 100 | Equivalent Chlorine (ECl) from the halocarbons listed above: alpha for bromine = 40 | sample Cl Cl Cl EECl EECl EECl ECl ECl ECl date NH SH GLOBE NH SH GLOBE NH SH GLOBE | 1992.0417 3056.5 2907.6 2982.1 2391.7 2304.5 2348.1 3154.7 3006.0 3080.3 1992.1250 3056.7 2906.6 2981.7 2420.2 2296.6 2358.4 3164.9 3004.0 3084.5 1992.2083 n.d. n.d. n.d. n.d. n.d. n.d. n.d. n.d. n.d. 1992.2917 3077.3 2916.8 2997.0 2451.5 2312.8 2382.2 3190.5 3021.6 3106.1 1992.3750 3080.6 2919.5 3000.1 2455.3 2309.5 2382.4 3194.8 3021.3 3108.1 1992.4583 3078.3 2925.6 3002.0 2462.2 2323.5 2392.9 3194.2 3031.1 3112.7 1992.5417 3078.8 2934.2 3006.5 2464.8 2328.7 2396.7 3194.7 3039.7 3117.2 1992.6250 3081.4 2940.6 3011.0 2458.7 2338.1 2398.4 3197.3 3046.6 3121.9 1992.7083 3084.0 2942.6 3013.3 2453.6 2349.1 2401.4 3199.2 3051.0 3125.1 1992.7917 3074.2 2940.1 3007.2 2460.0 2343.0 2401.5 3191.3 3050.1 3120.7 1992.8750 3082.9 2946.6 3014.7 2475.8 2328.2 2402.0 3200.7 3051.5 3126.1 1992.9583 3092.4 2949.1 3020.7 2482.7 2350.9 2416.8 3214.6 3059.8 3137.2 1993.0417 3093.4 2957.4 3025.4 2465.0 2359.3 2412.1 3211.1 3065.7 3138.4 1993.1250 3089.5 2956.8 3023.1 2479.2 2355.0 2417.1 3210.9 3066.6 3138.7 1993.2083 3091.2 2957.5 3024.4 2489.8 2351.7 2420.8 3211.7 3064.5 3138.1 1993.2917 3081.6 2958.4 3020.0 2480.9 2361.2 2421.0 3205.6 3069.0 3137.3 1993.3750 3081.3 2945.4 3013.4 2466.8 2355.8 2411.3 3204.0 3056.6 3130.3 1993.4583 3088.3 2961.8 3025.1 2484.4 2373.4 2428.9 3214.0 3075.7 3144.9 1993.5417 3081.1 2958.2 3019.7 2477.1 2380.5 2428.8 3202.5 3070.6 3136.6 1993.6250 3073.6 2971.8 3022.7 2468.3 2379.2 2423.8 3194.6 3083.8 3139.2 1993.7083 3079.0 2974.1 3026.6 2474.5 2377.3 2425.9 3201.2 3088.5 3144.9 1993.7917 3090.9 2963.9 3027.4 2493.4 2371.4 2432.4 3217.9 3078.3 3148.1 1993.8750 3098.2 2973.1 3035.6 2500.0 2382.0 2441.0 3224.5 3089.6 3157.1 1993.9583 3094.1 2972.8 3033.5 2499.5 2392.6 2446.0 3221.2 3092.4 3156.8 1994.0417 3081.9 2977.0 3029.4 2498.7 2392.0 2445.4 3211.0 3092.6 3151.8 1994.1250 3081.3 2978.2 3029.7 2494.8 2390.6 2442.7 3210.6 3095.9 3153.3 1994.2083 3090.0 2974.2 3032.1 2498.8 2381.5 2440.2 3219.4 3090.6 3155.0 1994.2917 3085.4 2973.4 3029.4 2505.7 2387.7 2446.7 3217.5 3091.1 3154.3 1994.3750 3079.6 2968.7 3024.2 2499.2 2393.0 2446.1 3209.6 3087.5 3148.6 1994.4583 3069.0 2965.5 3017.3 2487.0 2392.7 2439.8 3198.2 3085.4 3141.8 1994.5417 3069.3 2965.8 3017.5 2487.7 2392.5 2440.1 3201.3 3085.8 3143.5 1994.6250 3061.4 2962.9 3012.2 2476.4 2387.5 2432.0 3189.7 3082.0 3135.9 1994.7083 3057.1 2964.7 3010.9 2478.4 2392.5 2435.4 3187.3 3085.9 3136.6 1994.7917 3063.4 2965.5 3014.5 2488.4 2384.8 2436.6 3195.7 3086.9 3141.3 1994.8750 3072.4 2964.0 3018.2 2494.7 2375.6 2435.2 3205.1 3085.6 3145.4 1994.9583 3062.8 2961.2 3012.0 2486.4 2375.4 2430.9 3195.6 3080.7 3138.1 1995.0417 3053.4 2958.3 3005.8 2480.3 2387.0 2433.7 3187.4 3081.1 3134.2 1995.1250 3056.8 2962.4 3009.6 2458.1 2379.2 2418.6 3185.5 3082.5 3134.0 1995.2083 3050.9 2958.8 3004.8 2456.6 2378.8 2417.7 3184.3 3081.6 3133.0 1995.2917 3051.7 2959.2 3005.4 2468.6 2376.1 2422.3 3187.1 3081.0 3134.1 1995.3750 3045.8 2957.9 3001.8 2470.7 2377.7 2424.2 3180.4 3081.6 3131.0 1995.4583 3041.6 2953.2 2997.4 2465.7 2375.4 2420.5 3176.5 3078.4 3127.4 1995.5417 3035.5 2953.1 2994.3 2458.4 2370.3 2414.4 3170.1 3077.3 3123.7 1995.6250 3039.5 2953.6 2996.5 2460.6 2374.0 2417.3 3175.4 3077.9 3126.7 1995.7083 3032.8 2955.3 2994.1 2452.0 2384.3 2418.2 3167.4 3082.5 3125.0 1995.7917 3037.9 2954.9 2996.4 2460.0 2383.6 2421.8 3176.1 3083.4 3129.8 1995.8750 3040.4 2948.5 2994.5 2458.0 2374.6 2416.3 3178.2 3076.0 3127.1 1995.9583 3036.5 2954.0 2995.2 2458.2 2382.8 2420.5 3175.6 3083.9 3129.8 | end of file