- Coastal observing systems and their use in data assimilation models
- Study of coastal phenomena in context of their influence on global processes and budgets
- Study of natural versus anthropogenic variability of global biogeochemical cycles using observational data and numerical models of varying complexity and spatial extent
- Investigation of drivers of oxygen minimum zone variability under recent and climate change scenarios
- Regional case studies (e.g. coastal ocean, upwelling regions) of physical and chemical atmosphere-ocean interactions and their influence on sub-surface ocean physics, chemistry, and biology
- Evaluating and developing numerical ocean models using satellite data constraints (especially sea surface temperature, surface winds, and ocean colour products), and self-organizing ecosystem structures
- Scientific Manager, Department Head New Technologies, and Lead Project Manager COSYNA (Coastal Observing System for Nordic and Arctic Seas) Helmholtz-Zentrum Geesthacht, Institute of Coastal Research, Geesthacht, Germany
2014 - present
• Coordination of multi-institutional research activities in the North Sea
• Development and adaptation of physical and biogeochemical models for the North and Baltic Seas.
• Validation and application of models to assimilate measurements
• Design and development of a concept for “the Global Coast”, including versatile measurement platforms and numerical models
- Assistant Researcher, Department of Atmospheric and Oceanic Sciences and Joint Institute for Regional Earth System Science and Engineering
University of California, Los Angeles, Los Angeles, CA
2006 - 2013
• Development of a coupled ocean-ecosystem model as part of a NASA Carbon Monitoring System pilot study
• Numerical analysis of oxygen minimum zones and their variability
• Theoretical analysis of mechanisms governing the observed high variability in subsurface ocean biogeochemical quantities on interannual to decadal time-scales
• Numerical analysis of biogeochemical variability in modewaters (observations and numerical models) with emphasis on atmospheric drivers and signal transmission in the ocean interior
• Combined satellite data and model analysis of sea surface temperatures, heat budgets, and ocean currents.
• Eddy detection from satellite data (altimetry and sea surface temperatures)
- Postdoctoral Research
Institute of Geophysics and Planetary Physics, University of California, Los Angeles, Los Angeles, CA
2001 - 2006 (research advisor: Nicolas Gruber)
• Development of a conceptual model for biological remineralization and export for different marine environments using data from oceanic time series stations and numerical models of varying complexity
• Analysis of seasonal, interannual, and decadal variability of biogeochemical cycles in the subtropic and subpolar gyres.
• Implementation and coupling of a prognostic multi-functional group ecosystem model to a general ocean circulation model
- Doctoral Research Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany
1997 - 2001 (research advisors: Rüdiger Gerdes and Dirk Olbers)
• Investigation of interhemispheric interactions in the Atlantic Ocean performing response experiments with a coupled ocean-sea ice model (MOM-2)
• Analysis of the sensitivity of the global ocean circulation to variability in salinity and wind stress forcing
• Modification and development of a regional sea-ice model for use with a global ocean circulation model
- Diploma/Masters Research Max Planck Institute for Meteorology, Hamburg, Germany
1996 - 1997 (research advisor: Hans Graf)
• Analysis of teleconnection patterns and atmospheric precursors to the build-up of the equatorial warm pool during El Niño events (data and modeling)
• Reconstruction of general weather patterns during the Laacher See volcanic eruption in approx. 10,900 B.C. and localization of corresponding circulation patterns in atmospheric circulation model runs
- Adjunct Assistant Professor Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA
2006 - 2013
• Climate Change: From Puzzles to Policies
• Introduction to Atmospheric Environment
• Physical Oceanography
• Introduction to Chemical Oceanography
• California’s Ocean
• Directed Research in Atmospheric and Oceanic Sciences
• Teaching Apprentice Practicum
- Docent Los Angeles County Underwater Instructor Training Course, Carson, CA
• Introduction to Oceanography
- Docent Cruising Classroom Program for K-12 and college students, UCLA Seaworld,
Marina del Rey, CA
2005 - 2008
• Seawater Chemistry
- Public Programs Docent UCLA Ocean Discovery Center, Santa Monica, CA
2002 - 2004
• Ocean Biology and Environmental Science
- Teaching Assistant University of Bremen, Germany
• Dynamic Oceanography and Meteorology
- Teaching Assistant and Revision of Lectures University of Hamburg, Germany
• Dynamic Meteorology
- Voynova, Y.G., H. Brix, W. Petersen, S. Weigelt-Krenz and M. Scharfe, Extreme Flood Impact on Estuarine and Coastal Biogeochemistry: the 2013 Elbe Flood, Biogeosciences, 14, 541-557, doi:10.5194/bg-14-541-2017, 2017
- Brix, H., D. Menemenlis, C. Hill, S. Dutkiewicz, D. Wang, O. Jahn, K. Bowman, and H. Zhang, Using Green’s Functions to Initialize and Adjust a Global, Eddying Ocean Biogeochemistry General Circulation Model, Ocean Modelling, 95, 1-14, doi: 10.1016/j.ocemod.2015.07.008, 2015
- Lesley E. Ott, Steven Pawson, George J. Collatz, Watson W. Gregg, Dimitris Menemenlis, Holger Brix, Cecile S. Rousseaux, Kevin W. Bowman, Junjie Liu, Annmarie Eldering, Michael R. Gunson and Stephan R. Kawa (2015): Assessing the magnitude of CO2 flux uncertainty in atmospheric CO2 records using products from NASA's Carbon Monitoring Flux Pilot Project. Journal of Geophysical Research: Atmospheres, Volume 120, Issue 2, 27 January 2015, Pages: 734–765, DOI: 10.1002/2014JD022411
- Liu, J.; Bowman, K.W.; Lee, M.; Henze, D.K.; Bousserez, N.; Brix, H.; Collatz, G,J.; Menemenlis, D.; Ott, L.; Pawson, S.; Jones, D.; Nassar, R.: Carbon monitoring system flux estimation and attribution: impact of ACOS-GOSAT XCO2 sampling on the inference of terrestrial biospheric sources and sinks. In: Tellus B. Vol. 66 (2014) 22486. (DOI: 10.3402/tellusb.v66.22486)
- Brix, H., K.I. Currie, and S.E. Mikaloff Fletcher: Seasonal Variability of the Carbon Cycle in Subantarctic Surface Water in the South West Pacific, Global Biogeochemical Cycles, 27, 200-211, doi: 10.1002/gbc.20023, 2013.
- Álvarez, M., T. Tanhua, H. Brix, C. Lo Monaco, N. Metzl, E. McDonagh, and H.L. Bryden: Decadal Biogeochemical Changes in the Subtropical Indian Ocean Associated with Subantarctic Mode Water, Journal of Geophysical Research, 116, C09016, doi:10.1029/2010JC006475, 2011.
- Deutsch, C., H. Brix, T. Ito, H. Frenzel, and L. Thompson: Climate Forced Variability of Ocean Hypoxia, Science, 333(6040), pp. 336-339, doi:10.1126/science.1202422, 2011.
- Reid, P. C., A. Fischer, E. Lewis-Brown, M. Meredith, M. Sparrow, A. Andersson, A. Antia, N. Bates, U. Bathman, G. Beaugrand, H. Brix, S. Dye, M. Edwards, T. Furevik, R. Gangstø, H. Hátún, R. R. Hopcroft, M. Kendall, S. Kasten, R. Keeling, C. LeQuéré, F. T. Mackenzie, G. Malin, C. Mauritzen, J. Ólafsson, C. Paull, E. Rignot, K. Shimada, M. Vogt, C. Wallace, Z. Wang, and R. Washington: Impacts of the Oceans on Climate Change, In D. W. Sims, editor: Advances in Marine Biology, Vol. 56, Burlington: Academic Press, 2009, pp. 1-150.
- Brix, H., N. Gruber, D.M. Karl, and N.R. Bates: On the relationships between primary, net community, and export production in subtropical gyres, Deep Sea Research II, 53(5-7), 698-717, doi:10.1016/j.dsr2.2006.01.024, 2006.
- Brix, H., N. Gruber, and C.D. Keeling: Interannual variability of the upper ocean carbon cycle at station ALOHA near Hawaii, Global Biogeochem. Cycles, 18(4), GB4019, doi:10.1029/2004GB002245, 2004.
- Keeling, C.D., H. Brix, and N. Gruber: Seasonal and long-term dynamics of the upper ocean carbon cycle at station ALOHA near Hawaii, Global Biogeochem. Cycles, 18(4), GB4006, doi:10.1029/2004GB002227, 2004.
- Brix, H., and R. Gerdes: North Atlantic Deep Water and Antarctic Bottom Water: Their interaction and influence on the variability of the global ocean circulation, J. Geophys. Res., 108(C2), 3022, doi:10.1029/2002JC001335, 2003.
- Brix, H., J.L. Hench, H.L. Johnson, T.M.S. Johnston, J.A. Polton, M. Roughan, and P. Testor: An International Perspective on Graduate Education in Physical Oceanography, Oceanography, 16(3), 128-133, 2003.