Microphysical Properties of Warm Clouds During The Aircraft Take-Off and Landing Over Bucharest, Romania

Sabina Stefan,Andreea Boscornea,Sorin Nicolae Vajaiac,B Gross,F Moshary,M Arend

doi:10.1051/epjconf/201611916006

Abstract

This paper is focused on airborne measurements of microphysical parameters into warm clouds when the aircraft penetrates the cloud, both during take-off and landing. The experiment was conducted during the aircraft flight between Bucharest and Craiova, in the southern part of Romania. The duration of the experimental flight was 2 hours and 35 minutes in October 7th, 2014, but the present study is dealing solely with the analysis of cloud microphysical properties at the beginning of the experiment (during the aircraft take-off) and at the end, when it got finalized by the aircraft landing procedure. The processing and interpretation of the measurements showed the differences between microphysical parameters, emphasizing that the type of cloud over Bucharest changed, as it was expected. In addition, the results showed that it is important to take into account both the synoptic context and the cloud perturbation due to the velocity of the aircraft, in such cases.

Highlights

Cloud systems are the most important components of the atmosphere
The parameterization of cloud radiative properties, which is important for climatic models, depends on the parameterization of microphysical parameters like effective radius, drop size distributions and liquid water content (LWC) [2]
This study was designed to analyze the microphysical parameters during a take-off and landing procedures over the Bucharest airport, in time of an experimental flight between Bucharest and Craiova, which are two cities in southern part of Romania

Summary

Introduction

Cloud systems are the most important components of the atmosphere. The microphysical properties of clouds play an important role in weather forecasting, in the radiative and energetic budget of the earth, and, as such, in climatological studies [1]. The parameterization of cloud radiative properties, which is important for climatic models, depends on the parameterization of microphysical parameters like effective radius, drop size distributions and liquid water content (LWC) [2]. The drop/droplets concentrations and their size distributions are influenced by environment conditions, especially by temperature, pressure and atmospheric aerosol particles concentrations [3]. This study was designed to analyze the microphysical parameters during a take-off and landing procedures over the Bucharest airport, in time of an experimental flight between Bucharest and Craiova, which are two cities in southern part of Romania.

Methods

Results

Conclusion