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

TRAX train Air Quality on Rails

Using urban infrastructure to measure air quality Read more on how mobile sample collection via urban transit is gathering critical data on air pollution in the Salt Lake valley. In cooperation with the Utah Transit Authority, Logan Mitchell (postdoc in Lin and Ehleringer Labs) has launched continuous measurements of air quality across the Salt Lake Valley on the TRAX Red Line.

Snowshoe champion

Postdoc Daniel Mendoza has qualified for the National Snowshoe Championships. Trudge on with speed, Daniel!

Bush publication on the Nerdmobile

Susan Bush has just published a technical description of the ’nerdmobile’, our mini-truck for continuous observations on greenhouse gases and air pollutants. Included in the paper are maps of the spatial patterns emerging from mobile measurements. You can download the paper "Design and application of a mobile ground-based observatory for continuous measurements of atmospheric trace-gas and criteria pollutant species " here.

Brett TippleLeaf wax hydrogen isotopes record both environmental water source and humidity

In a recent experimental and modeling study, Brett Tipple has shown that the n-alkanes in leaf waxes clearly record both the influences of water source and atmospheric humidity. The research is published in Plant, Cell & Environment


Christy Mancuso Mancuso receives fellowship for stable isotopes research

Christy Mancuso was awarded a National Institute of Justice Graduate Research Fellowship in Science, technology, Engineering and Mathematics. Her project is "Fingernails as Recorders of Region-of-Origin and Travel History." Christy will be looking at how stable isotope analyses of human fingernails can be used to reconstruct an individual's movements. The primary objective of the study is to determine the extent to which strontium and oxygen isotope ratios of human fingernails are useful as diagnostic tools of geographic movement, similar to studies that are establishing forensic utility of stable isotope analysis of scalp hair

Logan Mitchell 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.
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.
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