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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >HALOGEN OCCULTATION EXPERIMENT OBSERVATIONS OF THE QUASI-BIENNIAL OSCILLATION AND THE EFFECTS OF PINATUBO AEROSOLS IN THE TROPICAL STRATOSPHERE
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HALOGEN OCCULTATION EXPERIMENT OBSERVATIONS OF THE QUASI-BIENNIAL OSCILLATION AND THE EFFECTS OF PINATUBO AEROSOLS IN THE TROPICAL STRATOSPHERE

机译：热带平流层中准双峰振荡的卤代烃职业观测和皮纳图博气溶胶的影响

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摘要

The time series of Halogen Occultation Experiment (HALOE) observed mixing ratios of chemical tracers in the tropical stratosphere (O-3, HCl, HF, CH4, NO2, NO, and H2O) exhibit obvious quasi-biennial oscillatory (QBO) characteristics. The pressure-time cross sections for the QBO signals in the mixing ratios of HCl, HF, CH4, NO, and H2O are presented for the first time. The QBO in O-3 and NO2 exibits similar amplitudes and patterns as observed and analyzed previously. An apparent in-phase relationship between O-3 and NO2 above 4 mbar is noted, which implies that ozone QBO may not be caused by NO2 chemical destruction in the upper stratosphere. During the early time period of the UARS mission (late 1991 to early 1992), the QBOs in most HALOE species are seen to be strongly affected by Pinatubo aerosols. In order to quantitatively define the different aerosol effects (heating Versus chemical) from HALOE data, we calculate the vertical displacements of constant volume mixing ratio surfaces of HALOE-measured species in the tropical lower stratosphere. The time evolutions of the vertical displacements of HCl and NOx (HALOE NO2 + NO) isopleths are seen to approximately follow that of HF. This indicates that the enhanced vertical velocity that acts to uplift the tracer profiles due to aerosol radiative heating is a significant effect. However, because of the uncertainty in the vertical displacement analyses of these tracers from HALOE data, it can only be concluded that changes in HCl and NOx from chemical effects are less than 30% and 80%, respectively. [References: 31]
机译：卤素掩星实验的时间序列（HALOE）观察到热带平流层中化学示踪剂（O-3，HCl，HF，CH4，NO2，NO和H2O）的混合比具有明显的准两年振荡（QBO）特征。首次显示了HCl，HF，CH4，NO和H2O混合比下QBO信​​号的压力-时间截面。 O-3和NO2中的QBO表现出与先前观察和分析的相似的振幅和模式。注意到在4 mbar以上，O-3与NO2之间存在明显的同相关系，这意味着臭氧QBO可能不是由平流层上部的NO2化学破坏引起的。在UARS任务的早期（1991年末至1992年初），大多数HALOE物种的QBO被认为受到Pinatubo气溶胶的强烈影响。为了从HALOE数据定量定义不同的气溶胶效应（加热与化学作用），我们计算了在热带低平流层中由HALOE测量的物种的恒定体积混合比表面的垂直位移。可以看到HCl和NOx的垂直位移的时间演变（HALOE NO2 + NO）等值线近似跟随HF的变化。这表明由于气溶胶辐射加热而引起的升高垂直速度的作用是提升示踪剂剖面，这是一个显着的效果。但是，由于从HALOE数据对这些示踪剂进行垂直位移分析的不确定性，只能得出以下结论：由于化学作用，HCl和NOx的变化分别小于30％和80％。 [参考：31]

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