MEASUREMENTS OF HCFC-142B AND HCFC-141B IN THE CAPE-GRIM AIR ARCHIVE - 1978-1993

被引:42
作者
ORAM, DE [1 ]
REEVES, CE [1 ]
PENKETT, SA [1 ]
FRASER, PJ [1 ]
机构
[1] CSIRO,DIV ATMOSPHER RES,CRC SO HEMISPHERE METEOROL,MORDIALLOC,VIC 3195,AUSTRALIA
关键词
D O I
10.1029/95GL02849
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
Stored air samples collected at Cape Grim, Tasmania since 1978, have been analyzed by GC-MS to investigate the change in the tropospheric concentration of HCFC-142b and HCFC-141b over the past 15 years. Between April 1978 and September 1993 the concentration of HCFC-142b rose from 0.20 +/- 0.02 pptv to 3.0 +/- 0.3 pptv, with the majority of this increase occurring from 1989 onwards. By mid-1993 the rate of increase had reached 0.9 +/- 0.1 pptv/yr. From 1982 to 1991 the average concentration of HCFC-141b was 0.08 +/- 0.01 pptv. A very sharp increase in concentration began in 1992. however, such that it reached 0.46 +/- 0.05 pptv by September 1993. Using a 2-D model of atmospheric chemistry, constrained by these observations, global emissions of these two compounds have been calculated and found to differ from other estimates, This is partly due to the background concentration levels which existed prior to the start of the other estimated emissions.
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页码:2741 / 2744
页数:4
相关论文
共 19 条
[1]   ESTIMATES OF ATMOSPHERIC HYDROXYL RADICAL CONCENTRATIONS FROM THE OBSERVED DECAY OF MANY REACTIVE HYDROCARBONS IN WELL-DEFINED URBAN PLUMES [J].
BLAKE, NJ ;
PENKETT, SA ;
CLEMITSHAW, KC ;
ANWYL, P ;
LIGHTMAN, P ;
MARSH, ARW ;
BUTCHER, G .
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 1993, 98 (D2) :2851-2864
[2]   GLOBAL TRENDS AND ANNUAL RELEASES OF CCL3F AND CCL2F2 ESTIMATED FROM ALE/GAGE AND OTHER MEASUREMENTS FROM JULY 1978 TO JUNE 1991 [J].
CUNNOLD, DM ;
FRASER, PJ ;
WEISS, RF ;
PRINN, RG ;
SIMMONDS, PG ;
MILLER, BR ;
ALYEA, FN ;
CRAWFORD, AJ .
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 1994, 99 (D1) :1107-1126
[3]  
DERWENT RG, 1990, TROPOSPHERIC LIFETIM, V2, P125
[4]  
ELKINS J, 1994, NITROUS OXIDE HALOCA, P72
[5]   DECREASE IN THE GROWTH-RATES OF ATMOSPHERIC CHLOROFLUOROCARBON-11 AND CHLOROFLUOROCARBON-12 [J].
ELKINS, JW ;
THOMPSON, TM ;
SWANSON, TH ;
BUTLER, JH ;
HALL, BD ;
CUMMINGS, SO ;
FISHER, DA ;
RAFFO, AG .
NATURE, 1993, 364 (6440) :780-783
[6]  
FRASER P, 1991, BASELINE, V89, P16
[7]  
KAYE JA, 1994, NASA1339 REP
[8]   OBSERVED STRATOSPHERIC PROFILES AND STRATOSPHERIC LIFETIMES OF HCFC-141B AND HCFC-142B [J].
LEE, JM ;
STURGES, WT ;
PENKETT, SA ;
ORAM, DE ;
SCHMIDT, U ;
ENGEL, A ;
BAUER, R .
GEOPHYSICAL RESEARCH LETTERS, 1995, 22 (11) :1369-1372
[9]   EARLY TRENDS IN THE GLOBAL TROPOSPHERIC ABUNDANCE OF HYDROCHLOROFLUOROCARBON-141B AND HYDROCHLOROFLUOROCARBON-142B [J].
MONTZKA, SA ;
MYERS, RC ;
BUTLER, JH ;
ELKINS, JW .
GEOPHYSICAL RESEARCH LETTERS, 1994, 21 (23) :2483-2486
[10]   MEASUREMENT OF CCL3F AND CCL4 AT HARWELL OVER THE PERIOD JANUARY 1975 NOVEMBER 1977 [J].
PENKETT, SA ;
BRICE, KA ;
DERWENT, RG ;
EGGLETON, AEJ .
ATMOSPHERIC ENVIRONMENT, 1979, 13 (07) :1011-1019