Increase of carbonyl fluoride (COF2) in the stratosphere and its contribution to the 1992 budget of inorganic fluorine in the upper stratosphere
Increase of carbonyl fluoride (COF2) in the stratosphere and its contribution to the 1992 budget of inorganic fluorine in the upper stratosphere
复制标题
平流层碳酰氟（COF2）的增加及其对1992年平流层上部无机氟预算的贡献
DOI：
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发表时间：
1994
期刊：
影响因子：
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通讯作者：
M. Ko
中科院分区：
文献类型：
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作者：
R. Zander;C. Rinsland;E. Mahieu;M. Gunson;C. B. Farmer;M. Abrams;M. Ko
COF 2的体积混合比分布已通过30 ° N和54 ° S之间的平流层的大部分来自一系列的0.01-/cm分辨率的红外太阳光谱记录在掩星模式的大气痕量分子光谱（ATMOS）仪器在ATLAS 1航天飞机使命的1992年3月至4月。与1985年4月至5月ATMOS/Spacelab 3使命获得的类似结果相比，发现在7年的时间间隔内，平流层中上部COF 2的累积增加量为67%。通过将COF 2结果的一部分与同样来自ATMOS观测的平流层上部HF浓度相结合，进一步发现，35公里高度以上的无机氟收支增加了在1985-1992年这段时间里，增长率为（60 +/- 10）%，相当于平均指数增长率为（6.7 +/- 1/1）%/年，或在1 sigma置信水平下，参考1985年的线性增长率为（8.5 +/- 1.3）%/年。1985年和1992年在平流层上部发现的总无机F原子体积混合比以及在此期间的增加反映了20世纪80年代早期至中期地面人造含氟化合物的增加。这表明氟的自然来源，特别是火山活动，对平流层上部观测到的氟变化的影响可以忽略不计。目前的研究结果和模型结果的比较的影响进行了讨论。«少
Volume mixing ratio profiles of COF2 have been derived through most of the stratosphere between 30 deg N and 54 deg S from series of 0.01-/cm resolution infrared solar spectra recorded in the occultation mode by the atmospheric trace molecule spectroscopy (ATMOS) instrument during the ATLAS 1 space shuttle mission of March-April 1992. When compared with similar results obtained from the ATMOS/Spacelab 3 mission of April-May 1985, the cumulative increase in the burden of COF2 in the middle and upper stratosphere was found to be 67% for that 7-year time interval. By combining a subset of these COF2 results with upper stratospheric concentrations of HF also derived from the ATMOS observations, it was further found that the budget of inorganic fluorine above 35 km altitude increased by (60 +/- 10)% over the 1985-1992 time interval, which corresponds to an average exponential rate of increase of (6.7 +/- 1/1)%/yr, or a linear rate of increase reference to 1985 of (8.5 +/- 1.3)%/yr at the 1 sigma confidence level. The total inorganic F atom volume mixing ratio found in the upper stratosphere for 1985 and 1992 and the increase during this perid mirror the rise in man-made fluorine-bearing compounds at the groundmore » during the early to mid 1980s. This demonstrates the negligible impact of natural sources of fluorine, in particular volcanic activity, on the observed change in F in the upper stratosphere. Implications of the present findings and comparison with model results are discussed.« less