| My Research |
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| BACKGROUND Key questions of the marine CO2 cycle relate to biological, chemical and physical processes of this greenhouse gas. An important topic is how the distribution of the surface pCO2 is controlled and how and why this parameter varies in time and space. During my doctorate thesis I was concerned with the marine CO2 cycle in the North Atlantic and this region shows considerable pCO2 variability. I used frequent underway pCO2 measurements to model the pCO2 variability with respect to biology, thermodynamics and air-sea exchange. One result is that the surface pCO2 mainly follows the sea surface temperature (SST) in the western basin. Here the biological forcing - modelled from the change in nitrate concentration - does not counteract the temperature effect such as in the eastern basin. In the latter the seasonal pCO2 cycle is less pronounced compared to the western basin with a much smaller seasonal amplitude (Lueger et al., 2004). I further used this dataset to estimates averaging effects by using different CO2 flux calculation methods (Lueger et al., 2006 a). In my current postdoctoral research I started a more extensive underway pCO2 database in the North Atlantic north of 40°N. These data were combined with remotely sensed satellite data which were used to calculate pCO2 algorithms and predict the CO2 flux in this area. Generally the most successful predictor has been sea surface temperature. In my recent work I found new algorithms that are based on not only SST but also employ mixed layer depth which helped to accurately predict surface ocean pCO2 and create seasonal CO2 flux maps (Lueger et al, 2006 b).
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PUBLICATIONS (peer-reviewed) (1) Lueger, H. The Variability of Surface pCO2 and Nutrients in the North Atlantic Ocean. Dissertation. University of Kiel, 2004.
(4) Lueger, H., Wanninkhof, R., Olsen, A. The CO2 air-sea flux in the North Atlantic estimated from satellite data. Under review for Tellus Series B, January 2006 b. (5) Tanhua, T., Biastoch, A., Körtzinger, A., Lueger, H., Böning, C., Wallace, D.W.R. Changes of anthropogenic CO2 and CFCs in the North Atlantic between 1981 and 2004. Under review for Global Biogeochemical Cycles, April 2006. |
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PRESENTATIONS Presentation at the Ocean Science Meeting (OSM) in Honolulu, Hawaii. Title: Common Data Reduction Common Data Reduction Practices for Underway fCO2 Measurements. February 2006.
Presentation at the University of California, Los Angeles (UCLA). Title: How to determine CO2 fluxes in the North Atlantic using VOS data. February 2006.
Presentation at the Ocean Ocean Carbon and Climate Change (OCCC) Workshop in Woodshole. Title: Seasonal Cycles of pCO2 and CO2 fluxes in the North Atlantic Ocean north of 40°N. August 2005.
Presentation as visiting scientist at the MS Explorer of the Seas courtesy of Royal Caribbean. Title: Cruise ships and climate change. May 2005.
Invited presentation at the American Geophysical Union conference in Vienna, Austria. Title: The SOLAS science and why is it important. April 2005.
Presentation at the Global Carbon Project Seminar in Tsukuba, Japan. Title: The Global Carbon Cycle as viewed from the Water Sciences. Part I: The Carbon Cycling in the Upper Ocean. July 2004.
Presentation at the Kiel Week (Aquarium). Title: "Autofrachter im Dienst der Wissenschaft: Das Projekt CAVASSOO am IfM, Kiel". June 2003.
Presentation at the shipping company Wallenius-Wilhelmsen in Stockholm.Title: "First results from CAVASSOO". November 2002. Presentation at the AGU conference in San Francisco, poster title: "Seasonal Amplitude of the Sea-Surface pCO2: Early Results from a new VOS-Line in the North Atlantic". December 2002. |
