Research in the Ehleringer Lab is directed at answering four ecological questions of societal relevance. First, how does drought influence carbon cycles in ecosystems of the western US? Second, how do humans and our choices influence carbon and water cycles in urban ecosystems? Third, how can stable isotopes analyses inform us about process related to human activities, our movements, and dietary choices? Fourth, how can we reconstruct climate history and broad precipitation patterns using biomarker proxies?

In the News

MOBILE MONIITORING OF TRACE GASES Logan Mitchell, working with Ryan Bares, l has installed greenhouse gas and ozone sensors into the TRAX light rail system. See the Utah Transit Authority article here, and read more about mobile measuring of urban greenhouse gas emissions here.
Popfar 2 site 33RD "depraved" year The Ehleringer and Sandquist labs just completed the 33rd survery of population dynamics of three desert shrubs. Read a blog post update here.


Global warming in the late holocene Postdoc Logan Mitchell has a paper in Science providing evidence of the human contribution to increased atmospheric methane concentration. Read more
Chakraborty NEW LAB MANAGER We are pleased to welcome Dr. Suvankar Chakraborty as manager of SIRFER, the Stable Isotope Ratio Facility for Environmental Research. Suvankar comes to us from the University of Kentucky, where he was the Research Facility Manager in the stable isotope laboratory in the Department of Earth and Environmental Sciences.
URBAN RED BUTTE MAP Will McDonald has recently completed a 40-cm resolution map of the vegetation of the urban portions of the Red Butte Creek watershed. This map will now allow iUTAH researchers and land managers the capacity to evaluate transpiration, water runoff, and ecological dynamics in the very urbanized watershed. Click here for a high resolution map and poster.
MELISSA BERKE accepted a new faculty position in Geology on the Notre Dame campus in South Bend. Look for her latest research results soon on n-alkane isotope variation along the North American monsoon gradient.
The NERDMOBILE is coming to your neighborhood. Our mobile laboratory provide high precision, instantaneous measurements of CO, CO2, CH4, NOX, O3, and particulate matter. Click here to learn more and to see some of the transect data sets.

LEAF WAXES record early season hydrology. In Brett Tippleā€™s latest paper in PNAS, he describes results of a series of experiments that are making paleoclimatologist reconsider how they interpret n-alkane isotope data (derived from leaf waxes). Click here to learn more.

SIE News Measuring co2 to fight global warming. Jiim Ehleringer and colleagues have developed a method which could reliably detect changes in CO2 of 15% or more. Potential climate treaties would necessarily rely on the ability to verify CO2 emissions. Ehleringer did the study with four Massachusetts atmospheric scientists: Kathryn McKain and Steven Wofsy of Harvard University, and Thomas Nehrkorn and Janusz Eluszkiewicz of Atmospheric and Environmental Research, Inc.
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