I am on leave the 2024 calendar year, after which I will be
retired from Oberlin College. My current address is 13 Wetomachick
Avenue, Westerly, RI 02891.
Research interests
Dynamical systems and its applications
Low-order climate modeling Publications
My most recent work centers on conceptual climate models, in which
the influence of major climate components such as incoming solar
radiation and surface albedo is studied. This research has been
supported by the Mathematics and Climate Research Network.
I have been strongly influenced by the dynamical systems approach to
climate modeling advanced by Dick McGehee.
J.A. Walsh and E. Widiasih, A discontinuous ODE model of the
glacial cycles with diffusive heat transport, in the Special
Issue "Applied Analysis of Ordinary Differential Equations,"
ed. S. Balasuriya, Mathematics8 (3) (March
2020), doi:10.3390/math8030316.
J.A. Walsh, E. Widiasih, J. Hahn and R. McGehee, Periodic
orbits for a discontinuous vector field arising from a
conceptual model of glacial cycles, Nonlinearity29
(2016), 1843-1864.
J.A. Walsh and R. McGehee, Modeling
climate
dynamically,The College Mathematics Journal44
(5) (2013), 350-363. (A special issue devoted to the Mathematics
of Planet Earth.)