Probing Finescale Dynamics and Microphysics of Clouds with Helicopter-Borne Measurements
Probing Finescale Dynamics and Microphysics of Clouds with Helicopter-Borne Measurements
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DOI：
10.1175/bams-87-12-1727
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发表时间：
2006-12
影响因子：
8
通讯作者：
H. Siebert;H. Franke;K. Lehmann;R. Maser;E. Saw;D. Schell;R. Shaw;M. Wendisch
中科院分区：
文献类型：
--
作者：
H. Siebert;H. Franke;K. Lehmann;R. Maser;E. Saw;D. Schell;R. Shaw;M. Wendisch
基于直升机的测量提供了在空间和时间上同时探测云的精细动力学和微观物理的机会。由于与研究飞机相比，真实空速较低，因此直升机可以进行更高空间分辨率的测量。为了规避直升机下流的影响，自主测量有效载荷机载云湍流观测系统 (ACTOS) 作为外部货物运输在直升机下方 140 m 处。 ACTOS 可以同时测量动态和云微物理参数，空间分辨率优于 10 厘米。湍流和云微物理过程之间的相互作用通过最近直升机测量的以下两个云案例进行了演示：i）具有低湍流度且没有强垂直动力的积云，以及相反，ii）活跃生长的云，具有增加的湍流和更强的上升气流。湍流和微物理测量...
Helicopter-based measurements provide an opportunity for probing the finescale dynamics and microphysics of clouds simultaneously in space and time. Due to the low true air speed compared with research aircraft, a helicopter allows for measurements with much higher spatial resolution. To circumvent the influence of the helicopter downwash the autonomous measurement payload Airborne Cloud Turbulence Observation System (ACTOS) is carried as an external cargo 140 m below the helicopter. ACTOS allows for collocated measurements of the dynamical and cloud microphysical parameters with a spatial resolution of better than 10 cm. The interaction between turbulence and cloud microphysical processes is demonstrated using the following two cloud cases from recent helicopter measurements: i) a cumulus cloud with a low degree of turbulence and without strong vertical dynamics, and, in contrast, ii) an actively growing cloud with increased turbulence and stronger updrafts. The turbulence and microphysical measurements ...