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Ulrike Egerer

Postdoctoral Scientist

About Ulrike

Ulrike Egerer works as a postdoc at NSIDC, and she is a Visiting Fellow at the Cooperative Institute for Research in Environmental Sciences (CIRES). She studies turbulence and turbulent transport in the Arctic atmospheric boundary layer, and how these small-scale motions interact with clouds and the sea-ice surface. Her work is mainly based on measurements with balloons and uncrewed aircraft during field campaigns in the Arctic. Egerer has been involved in turbulence instrument development, data collection on field campaigns, data processing and scientific analyses. Combining the turbulence measurements with further observations and simulations, she hopes to add another piece to the puzzle in understanding processes in the changing Arctic atmosphere.

Specialties

Arctic atmospheric boundary layer, turbulence, turbulent fluxes, airborne in-situ measurements, turbulence instruments, data processing and analysis

Current Research

Turbulent energy fluxes in the Arctic cloudy atmospheric boundary layer (ABL): Turbulent fluxes constitute a major part of the atmospheric energy budget and influence the surface heat balance by distributing energy vertically through the atmosphere. However, few in-situ measurements exist of the vertical profile of turbulent fluxes in the Arctic ABL, especially under cloudy conditions. This project is based on measurements with an uncrewed aerial vehicle (UAV) during the MOSAiC field campaign in the central Arctic ocean during the sea ice melt season of 2020. First, a suitable method will be elaborated to derive turbulent fluxes from the UAV turbulence measurements. Second, the resulting vertical profiles of turbulent fluxes will be analyzed concerning different ABL and sea ice conditions, including the influence of atmospheric stability, stratification, clouds, leads, and melt ponds. This study will help to advance our understanding of how turbulent fluxes influence the surface energy budget and interact with the melting sea ice. Source of support: CIRES Visiting Fellowship

Education

Ph.D., Meteorology, University of Leipzig, 2021
Dipl.-Ing., Aerospace Engineering, TU Dresden, 2014