Directory

Christian Haas

Publications

• Haas, C., Lobach, J., Hendricks, S., Rabenstein, L., Pfaffling, A.(2009). 'Helicopter-borne measurements of sea ice thickness, using a small and lightweight, digital EM system', Journal of Applied Geophysics, 67(3), 234-241.
• Nicolaus, M., Haas, C., Willmes, S.(2009). 'Evolution of first- and second-year snow properties on sea ice in the Weddell Sea during spring-summer transition', Journal of Geophysical Research, 114, D17109
• Pedersen, C.A., Hall, R., Gerland, S., Sivertsen, A.H., Svenoe, T., Haas, C. 2009  'Combined airborne profiling over Fram Strait sea ice: Fractional sea-ice types, albedo, and thickness measurements' Cold Regions Science and Technology  55: 23-32
• Willmes, S., Bareiss, J., Haas, C., Nicolaus, M. 2009  'Observing snowmelt dynamics on fast ice in Kongsfjorden, Svalbard, with NOAA/AVHRR data and field measurements' Polar Research  28(2): 203-213
• Willmes, S., Haas, C., Nicolaus, M., Bareiss, J.(2009). 'Satellite microwave observations of the interannual variability of snowmelt on sea ice in the Southern Ocean', J. Geophys. Res., 114, C03006.
• Haas, C., Pfaffling, A., Hendricks, S., Rabenstein, L., Etienne, J.-L., Rigor, I.(2008). 'Reduced ice thickness in Arctic Transpolar Drift favors rapid ice retreat', Geophys. Res. Lett., 35, L17501.
• Pfaffling, A., Haas, C., Reid, J. E.(2007). 'A direct helicopter EM sea ice thickness inversion, assessed with synthetic and field data', Geophysics, 72, F127-F137.
• Haas, C., Nicolaus, M., Willmes, S., Worby, A., Flinspach, D.(2008). 'Sea ice and snow thickness and physical properties of an ice floe in the western Weddell Sea and their changes during spring warming', Deep Sea Research II 55(8-9), 963-974.

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Research area

Sea ice, Arctic, Antarctic, sea ice thickness, electromagnetic (EM) sounding, microwave remote sensing, climate change

Research interest

Christian Haas is a sea ice geophysicist with a strong research interest in the role of sea ice in the climate system both in the Arctic and Antarctic, and its interaction with the biosphere. His research is also aiming at revealing the underlying causes for the recent, strong sea ice retreat in the Arctic. Christian is working on studies of sea ice properties and processes by means of in-situ measurements, airborne and satellite remote sensing, and modelling. His main activities are the establishment of operational ice thickness measurements in the Arctic Ocean, with the goal of systematic observations for climate studies, and satellite and in-situ investigations of snow processes on sea ice. At present, Christian holds an Alberta Ingenuity Scholarship.

Research opportunity

I am looking for graduate students who would be interested in studying and working in one of the following areas:

• Development of new airborne and ground-based sensors and algorithms for sea ice and snow surveying, involving in particular electromagnetic induction (EM) sounding, laser scanning, radar profiling, and DGPS surveying.
• Observations and modelling of sea ice and snow properties and processes in the Arctic and Antarctic, and in Alberta, and their interpretation in the context of climate change. This includes satellite remote sensing and in-situ measurements by various satellite and in-situ sensors.
• All projects comprise extensive field trips to the Arctic and Antarctic.

Education

University of Bremen