Greetings and Welcome to My Home Page!
I am an applied mathematician interested in
the mathematics of physical systems.
My research focuses on the development of
analytical and computational methods for
differential equations describing these systems.
My current research interest is in the dynamics of Earth's climate system.
"Mathematics and Climate,"
co-authored with my colleague Hans Engler (Georgetown University), was selected
for the "2013 Choice Award"
by the Atmospheric Science Librarians International (ASLI)
for its "accessible explanations in key areas where
climate and mathematics meet."
Recently, I have become interested in the concept of resilience and
the impact of climate change on human activities,
in particular on food systems and food security.
I am Founding Chair of the SIAM Activity Group on
"Mathematics of Planet Earth"
and co-director of the
"Mathematics and Climate Research Network,"
an NSF-funded network linking researchers across
the U.S. to develop the mathematics needed
to better understand Earth's climate.
My current academic affiliations are with
the Department of Mathematics and Statistics at
Georgetown University in Washington, DC, and
the University of Illinois at Urbana-Champaign,
where I am Adjunct Professor in the School of Music.
I am a Fellow of the
Society for Industrial and Applied Mathematics (SIAM), class of 2009, and
a member of the SIAM Committee on Science Policy.
I currently serve as editor in chief of the monthly newsletter
and as editor in chief of the SIAM Book Series on
"Mathematical Modeling and Computation."
I spent most of my scientific career in the
Mathematics and Computer Science Division
(and its predecessor, the Applied Mathematics Division)
of Argonne National Laboratory.
I retired from Argonne in December 2008 but retain
my affiliation with the laboratory as
Senior Mathematician Emeritus.
I have held visiting positions at several universities
in the U.S. and abroad, and have served
the mathematics community as Program Director
in the Division of Mathematical Sciences of the
National Science Foundation from 2001 until 2008,
with an interruption in 2004-'05.
I reside in Washington, DC.
(Note: The District of Columbia is not a state.
We have a Representative in the U.S. Congress,
who has limited voting privileges.
This colonial status is based on the U.S. Constitution,
Article 1, Section 8, Clause 17.
"Taxation without Representation.")
My coordinates are given below.