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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >RESPONSE OF SUMMERTIME ODD NITROGEN AND OZONE AT 17 MBAR TO MOUNT PINATUBO AEROSOL OVER THE SOUTHERN MIDLATITUDES - OBSERVATIONS FROM THE HALOGEN OCCULTATION EXPERIMENT
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RESPONSE OF SUMMERTIME ODD NITROGEN AND OZONE AT 17 MBAR TO MOUNT PINATUBO AEROSOL OVER THE SOUTHERN MIDLATITUDES - OBSERVATIONS FROM THE HALOGEN OCCULTATION EXPERIMENT

机译：17兆巴的夏季氮和臭氧对南方中期皮纳图博气溶胶的响应-卤素观测实验的观察。

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Observations of stratospheric NO, NO2, and O-3 from the Halogen Occultation Experiment (HALOE) are examined over the southern midlatitudes (35 degrees-45 degrees S) in the summers following the eruption of Mount Pinatubo, from early 1992 through mid-1995. The tracers HF and CH4, also observed by HALOE, are used to distinguish between the effects of chemistry and those of transport processes on the distribution of total reactive nitrogen (NOy) and ozone. Results show that at 17 mbar (about 28 km), in parcels of similar photochemical age, the abundances of summertime NO + NO2 (NOx) increased dramatically between 1992 and 1993 and then leveled off in subsequent years. The 1992-1993 increase is coincident in time with a sharp drop in aerosol surface area density as the Pinatubo aerosol cleared the atmosphere and gives evidence of the sensitivity of NOx to sulfate aerosol even at these altitudes, where the cycling of NOy through HNO3 is rapid. Results also show that summertime ozone abundances at 17 mbar declined by nearly 10% between 1992 and 1993 and then, Like NOx, remained about constant for the next three summers. The trend in ozone is opposite in sign to that observed at lower altitudes in the aftermath of the Pinatubo eruption and demonstrates the importance of the NOx catalytic cycles in the ozone loss budget above 26 km. [References: 57]
机译：在1992年年初至1995年中期爆发的皮纳图博火山爆发后的夏季，在南部中纬度地区（南纬35度至45度）检查了来自卤素掩星实验（HALOE）的平流层NO，NO2和O-3的观测结果。 HALOE还观察到了示踪剂HF和CH4，用于区分化学作用和运输过程对总活性氮（NOy）和臭氧分布的影响。结果表明，在光化学年龄相似的包裹中，在17 mbar（约28 km）处，夏季NO + NO2（NOx）的丰度在1992年至1993年之间急剧增加，然后在随后的几年中趋于平稳。 1992-1993年的增长与Pinatubo气溶胶清除大气层时气溶胶表面积密度的急剧下降相吻合，即使在这些高度下，NOy通过HNO3循环迅速的情况下，NOx对硫酸盐气溶胶的敏感性也得到了证明。 。结果还显示，从1992年到1993年，夏季的17 mbar臭氧丰度下降了近10％，然后，像NOx一样，在接下来的三个夏季保持不变。皮纳图博火山爆发后，臭氧的趋势与低空观测到的趋势相反，并且表明了NOx催化循环在26 km以上的臭氧损失预算中的重要性。 [参考：57]

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