Helicopter-borne measurements of small-scale processes in shallow cumulus convection over Barbados

巴巴多斯上空浅积云对流小规模过程的直升机测量

• 批准号: 164011789
• 负责人: Dr. Holger Siebert
• 金额: --
• 依托单位: Leibniz-Institut für Troposphärenforschung e.V. (TROPOS)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/164011789?language=en
• 关键词: Helicopter; borne; measurements; small; scale

The project proposed here aims at examining the complex interactions between atmospheric aerosol particles, small scale cloud dynamics, particle number size distributions, and radiative properties of trade wind cumulus clouds. The helicopter borne platform ’ACTOS’ will be used to measure meteorological parameters and properties of aerosol and clouds at Barbados. Measurements will be done in- and outside of clouds, with a high spatial resolution. For the first time, ACTOS will carry an adapted small CCNc (Cloud Condensation Nuclei counter) and newly developed fast instrumentation for aerosol characterization. Compared to aircraft measurements, the high spatial and temporal resolution, together with the low speed at which a helicopter flies, will enable a detailed examination of individual small trade wind cumuli and of their entrainment regions. Due to the ongoing mixing in these regions, they are important for the development of the cloud (droplet size distribution) as well as for modifying the aerosol (cloud processing, e.g. a change in particle hygroscopicity). This then also influences the optical properties of the cloud and its surroundings, and to capture this, radiation measurements will be done with instruments being positioned beneath the helicopter. By combining the different aspects, and particularly by examining the influence of different atmospheric aerosols, we aim at obtaining a better description of the early stages of trade wind cumuli, enabling a more detailed description of this cloud type in numerical (climate-) models. These proposed activities are embedded into a long term measurement program that will last for two years and that is realized by the MPI Hamburg (including remote sensing and measurements on the HALO aircraft).

此处提出的项目旨在检查大气气溶胶颗粒，小规模云动态，粒子数量分布和贸易气云云的辐射特性之间的复杂相互作用。直升机出生的平台“ Actos”将用于测量巴巴多斯气溶胶和云的气象参数和特性。测量将在云中进行，并具有很高的空间分辨率。 ACTOS首次将携带适合的小型CCNC（云凝结核计数器），并新开发的快速仪器用于气溶胶表征。与飞机测量值相比，高空间和临时分辨率以及直升机苍蝇的低速分辨率将详细检查单个小型贸易风能库利及其入口区域。由于这些区域中持续的混合，它们对于云的发展（液滴尺寸分布）以及修改气溶胶（例如云处理，例如粒子吸湿性的变化）至关重要。然后，这也影响了云及其周围环境的光学特性，为了捕获这一点，将使用位于直升机下方的仪器进行辐射测量。通过结合不同的方面，尤其是通过检查不同大气气溶胶的影响，我们旨在更好地描述贸易风量库里利的早期阶段，从而在数值（气候 - ）模型中更详细地描述这种云类型。这些提议的活动嵌入了一个长期测量计划中，该计划将持续两年，并由MPI Hamburg实现（包括遥远的敏感性和Halo飞机上的测量值）。

项目成果

New airborne retrieval approach for trade wind cumulus properties under overlying cirrus

• DOI: 10.1002/jgrd.50334
• 发表时间: 2013-05
• 期刊: Journal of Geophysical Research: Atmospheres
• 作者: F. Werner;H. Siebert;P. Pilewskie;T. Schmeissner;R. Shaw;M. Wendisch

Twomey effect observed from collocated microphysical and remote sensing measurements over shallow cumulus

• DOI: 10.1002/2013jd020131
• 发表时间: 2014-02
• 期刊: Journal of Geophysical Research: Atmospheres
• 作者: F. Werner;F. Ditas;H. Siebert;M. Simmel;B. Wehner;P. Pilewskie;T. Schmeissner;R. Shaw;S. Hartmann

Collocated measurements of boundary layer cloud microphysical and radiative properties: A feasibility study

边界层云微物理和辐射特性的并置测量：可行性研究

• DOI: 10.1029/2010jd013930
• 发表时间: 2010
• 期刊: Journal of Geophysical Research
• 作者: Henrich;H. Siebert;E. Jäkel;R. A. Shaw;M. Wendisch
• 通讯作者: M. Wendisch

The fine-scale structure of the trade wind cumuli over Barbados – An introduction to the CARRIBA project

巴巴多斯上空信风积云的精细尺度结构——CARRIBA项目简介

• DOI: 10.5194/acp-13-10061-2013
• 发表时间: 2013
• 期刊: Atmospheric Chemistry and Physics
• 影响因子: 6.3
• 作者: Siebert;M. Beals;J. Bethke;E. Bierwirth;T. Conrath;K. Dieckmann;F. Ditas;A. Ehrlich;D. Farrell;S. Hartmann;M. A. Izaguirre;J. Katzwinkel;L. Nuijens;G. Roberts;M. Schäfer;R. A. Shaw;T. Schmeissner;I. Serikov;B. Stevens;F. Stratmann
• 通讯作者: F. Stratmann

Retrieval of cirrus optical thickness and assessment of ice crystal shape from ground-based imaging spectrometry

利用地面成像光谱法反演卷云光学厚度并评估冰晶形状

• DOI: 10.5194/amt-6-1855-2013
• 发表时间: 2013
• 期刊: Atmospheric Measurement Techniques
• 影响因子: 3.8
• 作者: Schäfer;E. Bierwirth;A. Ehrlich;F. Heyner;M. Wendisch
• 通讯作者: M. Wendisch