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http://physicalsciences.ucsd.edu
http://casgc.ucsd.edu
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Presented by:
- The James R. Arnold
Lectureship Endowment fund
- The UCSD Division of Physical
Sciences
- The California Space
Grant Consortium
An endowed lectureship has
been established to honor
Professor James R. Arnold, one of UCSD's first faculty members and the
founding chair of the Chemistry Department. If you would
like to contribute to future lectures please click on the the donation
form below.
Donation
form for James R. Arnold Lectureship
This is a free public lecture. A
reception in honor
of Professor Jim Arnold will be held immediately afterwards.
This
lecture was
recorded and archived for future viewing. Click here to view video
(QuickTime).
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Friday
May 8, 2009
4:00 PM - 6:30 PM
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ABSTRACT:
Humans obtain
metabolic energy by eating food. Nitrogen
is required to grow food, but natural
supplies of nitrogen for human purposes have been inadequate since the
beginning of the twentieth century. The
Haber-Bosch process, invented in the early 20th century, now
provides a virtually inexhaustible supply of nitrogen fertilizer. This one invention is responsible for the
existence of about half of the world’s population.
That’s the good news.
The other
news is that most of this nitrogen (and additional
amounts from fossil fuel combustion) is lost to the environment where
it
contributes to smog,
greenhouse effect, ecosystem eutrophication, acid rain
and loss of stratospheric ozone in a sequential manner—the Nitrogen
Cascade.
This seminar will
examine the impact of this increased N
mobilization on the global N cycle by contrasting N distribution in the
late-19th
Century with those of the
late-20th Century.
It will review our
understanding of
the primary points of nitrogen loss to the environment, and the impacts
on
people and ecosystems.
The
seminar will conclude with the challenges facing society
to optimize the use of nitrogen to provide food for the world’s
peoples, yet
minimize the negative consequences on the environment.
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James Galloway
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Sidman P. Poole Professor of Environmental
Sciences,
University of Virginia, Charlottesville, Virginia
James
N. Galloway is the Sidman P. Poole Professor of Environmental Sciences,
and
effective May 1, 2009, the Associate Dean of Science in the College of
Arts and
Sciences, at the University of Virginia. Dr.
Galloway received the B.A.
degree in Chemistry and Biology from
Whittier College in 1966. In 1972 he
received his Ph.D. degree in Chemistry from the University of
California, San
Diego; Jim Arnold was his advisor. Following
two years as a
professional potter in Lexington, Virginia, he
accepted a postdoctoral appointment with Gene Likens at Cornell
University. In 1976, he accepted a
position
as Assistant Professor of Environmental Sciences at the University of
Virginia.
He served as President of the Bermuda Biological Station for Research
(now
Bermuda Institute of Ocean Sciences) from 1988 to 1995, and as chair of
Environmental Sciences, University of Virginia from 1996 to 2001. He served as the founding chair of the
International Nitrogen Initiative from 2003 to 2008, and has been a
member of
the USA EPA Science Advisory Board since 2003.
In
2002 he was elected a Fellow of the American Association for the
Advancement of
Science. In 2008 he was elected a Fellow of the American Geophysical
Union and
was awarded, with Harold Mooney, the Tyler Prize for Environmental
Achievement.
His research on biogeochemistry includes the natural and anthropogenic
controls
on chemical cycles at the watershed, regional and global scales. His current research focuses on beneficial
and detrimental effects of reactive nitrogen as it cascades between the
atmosphere, terrestrial ecosystems and freshwater and marine ecosystems.
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National
Aeronautics
and Space Administration |
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National Space
Grant College
and Fellowship Program |
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Copyright 2007
California Space Grant Consortium
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