Great Lakes water vapor measurements LGR Triple Water Isotope Analyzer deployed on the R/V Blue Heron
R/V Blue Heron The Welp lab participated in two cruises during summer 2016.
Leaf gas exchange measurements Student uses the LiCor 6400 to measure photosynthesis, transpiration, and stomatal conductance of different crops in the field.
Atmospheric CO2 seasonal cycle increases The peak-to-trough amplitude of the CO2 seasonal cycle at Barrow, Alaska has increased by about 50% over the last 50 years. Indicates wide-spread ecological changes have occurred.
Stable isotopes from the Kolyma River in Siberia Oxygen isotope analysis suggests that summer evapotranspiration in this northeastern Siberian ecosystem is fueled by as much as 40% snowmelt.
Water vapor exchange between crops and the atmosphere Measuring the isotopic composition of evapotranspiration and the sites of leaf water evaporation in a soybean canopy.
Artic zone and boreal zone Artic zone and boreal zone
El Nino signature discovered in oxygen isotopes of atmospheric CO2 This El Nino signal was used to estimate the global rate of terrestrial photosynthesis.