Observation of NOy uptake by particles in the Arctic tropopause region at low temperatures
Observation of NOy uptake by particles in the Arctic tropopause region at low temperatures
复制标题
北极对流层顶地区低温下颗粒对 NOy 吸收的观测
DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
C. Schiller
中科院分区：
文献类型：
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作者：
C. Feigl;H. Schlager;H. Ziereis;J. Curtius;F. Arnold;C. Schiller
1997年1月24日，在POLSTAR飞行期间，通过冰云进行了气体和冷凝相NOy，HNO 3，O3以及颗粒浓度和尺寸的测量。在对流层顶以下的冰云中，仅检测到2 - 4pptv粒子NOy。观察到的总HNO 3的平均混合比明显大于检测到的颗粒NOy。然而，考虑到NOy和HNO 3测量的组合误差限值，不能排除所观察到的NOy吸收受到可用气相HNO 3的限制。在卷云穿透期间测得的总HNO 3与气态NOy的比率仅为0.2，而在飞行的平流层部分为0.9。
Measurements of gas‐ and condensed‐phase NOy, HNO3, O3, and particle concentration and size were performed on 24 January 1997 during POLSTAR on a flight through an ice cloud. In the ice cloud below the tropopause only 2 to 4 pptv particle NOy were detected. The observed average mixing ratio of total HNO3 is significantly larger than the detected particle NOy. Considering the combined error limits of the NOy and HNO3 measurements, however, it cannot be ruled out that the observed uptake of NOy was limited by the available gas‐phase HNO3. The ratio of total HNO3 to gaseous NOy measured during the cirrus cloud penetration amounts only to 0.2 in contrast to 0.9 in the stratospheric part of the flight.