Patrick Martineau, Ph.D., postdoctoral researcher

Patrick Martineau

Patrick Martineau

    I am currently a postdoctoral researcher at the Research Center for Advanced Science and Technology (RCAST) at the University of Tokyo working with professor Hisashi Nakamura.

    My research focuses on climate variability in the extratropics from the surface to the stratopause.

    My most recent project is about the connection between the state of oceans and subseasonal variability in the lower troposphere over decadal to multidecadal timescales. I wish to improve our understanding of how ocean basic state can modulate atmospheric circulation on a large scale and how it then influences the propagation of Rossby waves, an important source of subseasonal variability in the mid-latitudes. The ultimate goal is to be able to better predict whether weather will become more or less variable in the future due to slow changes in ocean temperatures.

    I am also interested in the study of extreme events affecting the mid-latitudes in the Northern Hemisphere. One important question regarding climate change is whether extreme events, such as cold spells and heat waves, will become more frequent in the future. To answer this question, I use novel diagnostics of wave activity and apply them to observations to evaluate trends and understand the dynamics of these events.

    I also use observations and idealized models to study how the stratosphere and the troposphere are coupled together on subseasonal timescales. Some of the most dramatic dynamical events observed in the atmosphere, the sudden stratospheric warming events, occur in the polar stratosphere and have repercussions on the weather we experience at the surface. Understanding how these events are triggered and how they affect surface weather is thus of great importance.

    Finally, I am involved in the S-RIP project which aims to better characterize and understand differences in the representation of the atmosphere in reanalysis datasets. For this project I contribute to the chapter on Stratosphere-Troposphere coupling and I am also interested to compare the skill of reanalysis datasets to reproduce extreme weather events affecting the mid-latitudes.

    Email: pmartineau(at)atmos.rcast.u-tokyo.ac.jp
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