Who's
who
Current
researchers in the Isotope Tracers team:
KENDALL, Carol
(650-329-4576, ckendall@usgs.gov)
Chief of the Isotope Tracers Project. Carol is a 4th generation Californian
who got her BS and MS at UC-Riverside, and later her PhD at the University of Maryland
while working at the USGS headquarters in Virginia. Since 1990, she has been the
head of the Isotope Tracers research project at the USGS regional office in
Menlo Park.
The purpose of this project is to develop new isotope methods and applications
to solve problems of national importance. Her main research focus is
tracing sources of nutrients, organics, and water in human-impacted aquatic
ecosystems. She is the co-editor of the 1998 book “Isotope Tracers in
Catchment Hydrology” and has taught dozens of isotope hydrology
short-courses over the past 20 years for the USGS and various federal,
state, academic, and international organizations.
MICHEL, Bob
(650-329-4547, rlmichel@usgs.gov)
EMERITUS. Former manager of the
Tritium Lab. Bob's main fields of
interest are alpine and arid zone hydrology.
SILVA, Steve
(650-329-4538, srsilva@usgs.gov)
Steve divides his time between methods development research, and several
research projects related to nutrient sources. Most of his current methods
development research has been on devising new ways to expand project
analytical capabilities. He is currently focused on tracing nitrate and POM
sources in big river systems using a multi-isotope approach.
YOUNG, Megan (650-329-4544, mbyoung@usgs.gov)
Manager of the Tritium Lab. Megan is
an isotope biogeochemist. She received her Ph.D.
from the Department of Geological & Environmental Sciences at Stanford University, working in Dr. Adina Paytan’s Chemical Oceanography lab. She is currently
working on several different projects using multiple stable isotopes to
trace interactions between groundwater, surface water, and anthropogenic
nutrient inputs. Her primary research project is the isotope component of a
large CALFED study in the San Joaquin River area tracing nutrient and
organic matter sources through the river system and linking these to low
dissolved oxygen conditions in the Stockton Deep Water Shipping Channel.
Megan is also working on using oxygen isotopes of dissolved phosphate to
identify different phosphate sources in aquatic ecosystems.
Past
team members:
BEMIS, Bryan.
Bryan was an
isotope geochemist post-doc. His main interests were applying isotopic
ratio techniques to solving environmental problems, including using
compound specific isotopic ratio techniques for tracing sources of
nutrients to the base of aquatic food webs, food chain reconstructions,
mercury bioaccumulation, characterizing sources of DOC to wetlands, and
correlating THM formation potential with DOC type. He is now a biogeochemist at Applied Marine Sciences, CA.
CHANG, Cecily.
Cecily divided her time between methods development work, and working with
WEBB, NAWQA, and other nitrate-related projects. Cecily developed an
improved method for collecting and analyzing nitrate for 18O
from very dilute, DOC rich waters that was used in many watershed nitrate
studies. She is currently focusing on nitrate sources and cycling in big
river systems. She has retired from the USGS.
DOCTOR, Dan (dhdoctor@usgs.gov)
Dan was an NRC post-doc, and divided his time between working on sources
and cycling of carbon (DIC and DOC) at one of the WEBB program sites (Sleepers
River VT) using our new automated TIC/TOC analyzer connected to an IsoPrime mass spectrometer, and working on our
CALFED-funded projects. He is now a research geologist at the USGS in
Reston VA.
ELLIOTT, Emily.
Emily was an isotope biogeochemist post-doc
working on our NYSERDA and EPRI-funded project on mapping the nitrate
isotopic composition of precipitation across the USA, and in particular the
state of NY. We were testing the
hypothesis that nitrate in precipitation derived from emissions from
vehicles and power plants might have distinguishable nitrate isotope
compositions. She is now an
assistant professor in the geology department of the University of
Pittsburgh, in PA.
WANKEL, Scott.
Scott divided his time between managing our laboratory database and helping
with method development and ongoing ecological projects, with his thesis
work (at Stanford, in collaboration with Adina Paytan).
He was especially interested in foodweb ecology at the bottom of the
foodweb. His dissertation focused on nutrient sources and cycling in Monterey Bay. He is now a research scientist
at WHOI, MA.
There
is more information about the "Isotope Tracers" project,
including project goals and recent publications, on the NRP homepage.
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