Research page of Julien Emile-Geay

		JEG : The Research Page
Research Interests		I am currently a post-doctoral researcher at the Georgia Institute of Technology, after finishing my PhD in November... this website needs a rebirth, which it will get soon... Broadly speaking, my research is concerned with the role of the Tropics in long-term climate change. The central actor of this game is of course the El Niño-Southern Oscillation (ENSO) phenomenon, whose behavior I strive to understand on decadal to millennial timescales. My current research project is "Constraining the tropical Pacific’s role in low-frequency climate change of the last millennium", with Kim Cobb, Michael Mann, Nick Graham, Mike Alexander and Martin Hoerling.
CV		My curriculum vitae (in PDF, but not in Latin, be reassured)
Publications		Work done during my PhD thesis : Dissertation abstract (PDF) Grand Dissertation in Technicolor : ENSO dynamics and the Earth's climate : from decades to Ice Ages (PDF, 8.7 Mb) Chapter 1 : Emile-Geay, J. and M. A. Cane, Pacific decadal variability in the view of linear equatorial wave theory . PDF In preparation for the Journal of Physical Oceanography Chapter 2 : Emile-Geay, J., R. Seager, M. A. Cane, E.C. Cook, G.H. Haug, Volcanoes and ENSO over the past millennium. Submitted to Journal of Climate. PDF Chapter 3 : Emile-Geay, J., M. A. Cane, R. Seager, A. Kaplan, P. Almasi, ENSO as a mediator of the solar influence on climate . under revision for Paleoceanography. PDF Clement, A.C., Emile-Geay, J., Seager, R., Cane, M. A. , Evans, M.N., America for the last millennium, PAGES Newsletter , Aug 2006 PDF Herweijer, C., R. Seager, E. C. Cook, and J. Emile-Geay, 2007: North american droughts of the last millennium from a gridded network of tree-ring data. Journal of Climate, in press. PDF Work done during my Master's thesis at LOCEAN in Paris, France (Diplôme d'Etudes Approfondies, 2001) : Emile-Geay, J., and Madec, G., Geothermal heating, diapycnal mixing, and the abyssal circulation. to be re-submitted to Journal of Geophysical Research PDF Work done during my second year at the Ecole Normale Supérieure (Maîtrise, 2000) as a visiting student at Lamont: Emile-Geay, J., M. A. Cane, N. Naik, R. Seager, A. C. Clement and A. van Geen, 2003: Warren revisited: Atmospheric freshwater fluxes and "Why is no deep water formed in the North Pacific ?". Journal of Geophysical Research - Oceans, 108(C6): 3178, doi: 10.1029/2001JC001058. PDF
Presentations		Conference in Mathematical Geophysics, June 2004. Abstract European Geophysical Union, Vienna , April 2005. Abstract Cooperative Institute for Climate Applications and Research , September 2005. PDF American Geophysical Union, December 2005. PDF Conference in Mathematical Geophysics, June 2006.
Data		DATA Data used in the PAGES newsletter article (link) : The following files contain a table (1000 rows by 3 columns). The first column is time (years A.D.), the second is the forcing (W/m2) and the third is the model response, as described by the 100-member ensemble average of the NINO3 index over 1000-1999 A.D. forced by radiative anomalies in two cases : Solar Irradiance anomalies, as in Crowley (2000) and Mann et al (2005). ASCII file Solar Irradiance + Volcanic aerosol frocing anomalies (same reference). ASCII file Other : NINO3 index from Cane-Zebiak model, 150,000 yr unforced run (code by Takashi Kagimoto, JAMSTEC) binary Here is a Matlab script to read it : read_KG_ind2.m (you need to specify a length of 150 000 years and 4 values per year (npy=4) )

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