GALBRAITH Eric
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Earth & Planetary Sciences eric.galbraith@mcgill.ca |
Ph.D., University of British Columbia, Canada (2006)
Department of Earth and Planetary Sciences, McGill University
Publications
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Rodgers, K.B., Fletcher, S.E.M., Bianchi, D., Beaulieu, C., Galbraith, E.D., Gnanadesikan, A., Hogg, A.G., Iudicone, D., Lintner, B., Naegler, T., Reimer, P.J., Sarmiento, J.L., Slater, R.D., 2011. Interhemispheric gradient of atmospheric radiocarbon reveals natural variability of Southern Ocean winds, Climate of the Past Discussions, 7(1), 347-379. pdf
Galbraith, E.D., Gnanadesikan, A., Dunne, J.P., Hiscock, M.R., 2010. Regional impacts of iron-light colimitation in a global biogeochemical model, Biogeosciences, 7 (3), 1043-1064. pdf
Jaccard, S.L., Galbraith, E.D., Sigman, D.M., Haug, G.H., 2010. A pervasive link between Antarctic ice core and subarctic Pacific sediment records over the past 800 kyrs, Quaternary Science Reviews, 29 (1-2), 206-212. pdf
Somes, C.J., Schmittner, A., Galbraith, E.D., Lehmann, M.F., Altabet, M.A., Montoya, J.P., Letelier, R.M., Mix, A.C., Bourbonnais, A., Eby, M., 2010. Simulating the global distribution of nitrogen isotopes in the ocean, Global Biogeochemical Cycles, 24(4), GB4019. pdf
Publications Pré-GEOTOP
Galbraith, E.D., Gnanadesikan, A., Dunne, J.P., Hiscock, M.R., 2009. Regional impacts of iron-light colimitation in a global biogeochemical model, Biogeosciences Discussions, 6, 7517-7564.
Jaccard, S.L., Galbraith, E.D., Sigman, D.M., Haug, G.H., Francois, R., Pedersen, T.F., Dulski, P., Thierstein, H.R., 2009. Subarctic Pacific evidence for a glacial deepening of the oceanic respired carbon pool, Earth and Planetary Science Letters, 277(1-2), 156-165.
Galbraith, E.D., Kienast, M., Jaccard, S.L., Pedersen, T.F., Brunelle, B.G., Sigman, D.M., Kiefer, T., 2008. Consistent relationship between global climate and surface nitrate utilization in the western subarctic Pacific throughout the last 500 ka, Paleoceanography, 23(2), art. no. PA2212.
Kienast, M., Lehmann, M.F., Timmermann, A., Galbraith, E., Bolliet, T., Holbourn, A., Normandeau, C., Laj, C., 2008. A mid-Holocene transition in the nitrogen dynamics of the western equatorial Pacific: Evidence of a deepening thermocline? Geophysical Research Letters, 35(23), art. no. L23610.
Schmittner, A., Galbraith, E.D., 2008. Glacial greenhouse-gas fluctuations controlled by ocean circulation changes, Nature, 456(7220), 373-376.
Schmittner, A., Oschlies, A., Matthews, H.D., Galbraith, E.D., 2008. Future changes in climate, ocean circulation, ecosystems, and biogeochemical cycling simulated for a business-as-usual CO¸2 emission scenario until year 4000 AD, Global Biogeochemical Cycles, 22 (1), art. no. GB1013.
Galbraith, E.D., Jaccard, S.L., Pedersen, T.F., Sigman, D.M., Haug, G.H., Cook, M., Southon, J.R., Francois, R., 2007. Carbon dioxide release from the North Pacific abyss during the last deglaciation, Nature, 449(7164), 890-893.
Schmittner, A., Galbraith, E.D., Hostetler, S.W., Pedersen, T.F., Zhang, R., 2007. Large fluctuations of dissolved oxygen in the Indian and Pacific oceans during Dansgaard-Oeschger oscillations caused by variations of North Atlantic Deep Water subduction, Paleoceanography, 22(3), art. no. PA3207.
Meissner, K.J., Galbraith, E.D., Völker, C., 2005. Denitrification under glacial and interglacial conditions: A physical approach, Paleoceanography, 20(3), art. no. PA3001, 1-13, DOI: 10.1029/2004PA001083.
Galbraith, E.D., Kienast, M., Pedersen, T.F., Calvert, S.E., 2004. Glacial-interglacial modulation of the marine nitrogen cycle by high-latitude O2 supply to the global thermocline, Paleoceanography, 19(4), 1-12, DOI: 10.1029/2003PA001000.
Book Chapters
Galbraith, E.D. , Sigman, D., Pedersen, T., Robinson, R.S., Past changes in the marine nitrogen cycle. In Nitrogen in the Marine Environment, 2nd edition; Capone, D., Bronk, D., Mulholland, M. and Carpenter, E. (eds.), Elsevier 2008. (Invited chapter)
Thèmes de recherche
The marine ecosystem exerts a fundamental control on the chemistry of the oceans, as well as - via air-sea gas exchange - on the chemistry of the atmosphere. For example, the atmospheric concentrations of carbon dioxide and nitrous oxide are both significantly impacted by where and how organisms grow in the ocean, and what happens to them when they die. At the same time, the physical climate state has an impact on the marine ecosystem, primarily by changing ocean circulation. This changes things like the resupply of nutrients from the deep ocean to the sunlit surface, and the supply of dissolved oxygen from the surface to the deep. I use three complementary tools to study these links between the marine ecosystem and climate: observations of the modern ocean, simulations of ocean biogeochemistry with computer models, and sedimentary records of past climate change. The geological archive offers a rich array of natural experiments during which the climate and marine ecosystem changed, sometimes violently - but the archive is hard to read, and the mechanisms at work are often ambiguous. Observations of the modern ocean are critical in order to understand the dynamical processes at play behind these past changes. Computer models can help to explore hypotheses, by illustrating natural modes of variability in the climate system, by testing their applicability to past episodes of change, and by pinpointing uncertainties. Ultimately, the research is directed toward an enhanced appreciation of variability in the Earth system, which may help us predict future changes.Étudiants
Yang, Simon: M.Sc. in Earth and Planetary sciences, McGill University
Sujet de recherche: Dynamics of the Antarctic circumpolar nutrient pump
Carozza, David: Ph.D. in Earth and Planetary sciences, McGill University
Sujet de recherche: Integrating economics and the Earth system
