Turbulence measurements in polar clouds during the (AC)3 aircraft campaigns ACLOUD, AFLUX and MOSAiC-ACA


Contact
Christof.Luepkes [ at ] awi.de

Abstract

Based on several case studies it is shown that clouds have a large impact on the mean and turbulent structure of the atmospheric boundary layer. This is shown by the analysis and comparison of results of data from different types of flight patterns. The data show clearly that turbulence is closely connected with radiation. Cloud top radiative cooling is redistributed by turbulence in the mixed layer. This is visible in different statistical moments of the turbulence, and often, e.g. a peak of the turbulent kinetic energy is measured within the clouds. As discussed in the talk, the detailed structure, depends on many parameters such as the atmospheric temperature and stability, the cloud optical thickness, wind speed and direction relative to the ice edge. Also surface roughness and the related wind shear are shaping profiles of turbulence moments. Finally, it is shown that the existence of multi-layer clouds is one of the most important factors for the turbulence structure of the lower atmospheric layers.



Item Type
Conference (Invited talk)
Authors
Divisions
Primary Division
Programs
Primary Topic
Helmholtz Cross Cutting Activity (2021-2027)
N/A
Peer revision
Not peer-reviewed
Publication Status
Published
Event Details
Oslo joint seminar in atmospheric, ocean and climate science, 03 Feb 2022 - 03 Feb 2022, University in Oslo (UiO), Department of Geosciences.
Eprint ID
55614
Cite as
Lüpkes, C. , Chechin, D. , Hartmann, J. , Stapf, J. and Wendisch, M. (2022): Turbulence measurements in polar clouds during the (AC)3 aircraft campaigns ACLOUD, AFLUX and MOSAiC-ACA , Oslo joint seminar in atmospheric, ocean and climate science, University in Oslo (UiO), Department of Geosciences, 3 February 2022 - 3 February 2022 .


Share

Geographical region

Research Platforms

Campaigns
POLAR 5 > P5_206_ACLOUD_2017
POLAR 5 > P5_216_AFLUX_2019
POLAR 5 > P5_223_MOSAiC_ACA_2020
POLAR 6 > P6_206_ACLOUD_2017


Actions
Edit Item Edit Item