其他null检测 | 暖积云夹带的微观物理痕记-北京欧兰科技发展有限公司

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应用领域	其他
检测样本	其他
检测项目
参考标准	暂无

采用美国Artium公司的机载相位多普勒粒子干涉仪（PDI）飞行探头。测量暖积云中微小水液滴的粒径和速度，并据此得出液态水含量LWC数据。探头悬挂安装在双水獭飞机机翼下。在空中飞行状态下，对云层进行测量。

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Artium PDI-FP 双量程可机载飞行探头
型号：PDI-FPDR

¥50万 - 100万
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We analyse the cloud microphysical response to entrainment mixing in warm cumulus clouds observed from the CIRPAS Twin Otter during the GoMACCS field campaign near Houston, Texas, in summer 2006. Cloud drop size distributions and cloud liquid water contents from the Artium Flight phase-Doppler interferometer in conjunction with meteorological observations are used to investigate the degree to which inhomogeneous versus homogeneous mixing is preferred as a function of height above cloud base, distance from cloud edge and aerosol concentration. Using four complete days of data with 101 cloud penetrations (minimum 300m in length), we find that inhomogeneous mixing primarily explains liquid water variability in these clouds. Furthermore, we show that there is a tendency for mixing to be more homogeneous towards the cloud top, which we attribute to the combination of increased turbulent kinetic energy and cloud drop size with altitude which together cause the Damko¨ hler number to increase by a factor of between 10 and 30 from cloud base to cloud top. We also find that cloud edges appear to be air from cloud centres that have been diluted solely through inhomogeneous mixing. Theory predicts the potential for aerosol to affect mixing type via changes in drop size over the range of aerosol concentrations experienced (moderately polluted rural sites to highly polluted urban sites). However, the observations, while consistent with this hypothesis, do not show a statistically significant effect of aerosol on mixing type.

上一篇在一个双稳湍流涡旋火焰中，对间歇性动态的时间-频率定位

下一篇液滴脉冲管中液滴开始固化时的液滴粒径和温度估计

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北京欧兰科技发展有限公司

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