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xiuchen measuring photosynthetic capacity

Xiuchen Jiang successfully defends thesis on bur oak thermal safety margins

Sunday, April 12, 2026
On Wednesday, April 8, Xiuchen successfully defended his M.A. thesis on "Changes in bur oak leaf temperature, critical temperature, and thermal safety margin under elevated temperature and CO2." Congratulations Xiuchen!
flux tower

Riley Pacer successfully defends thesis on cooling potential of restored prairie

Sunday, April 12, 2026
On Friday, April 3, Riley successfully defended her M.A. thesis on "Assessing the Biogeophysical Cooling Potential of Constructed Prairie with Eddy Covariance & Thermal UAS Remote Sensing." Congratulations Riley!
Map of FLUXNET sites

Feng Wang publishes new article evaluating gridded climate products in U.S.

In a new article in Environmental Research Letters, ECH2O Lab personnel show that annual tree growth models are not sensitive to large differences in precipitation among gridded meteorological datasets.
conceptual diagram

Seasonal stabilization effects slowed the greening of the Northern Hemisphere over the last two decades

Friday, July 11, 2025
In a new article in Nature Communications, Wen Zhang, Matt Dannenberg, and colleagues show that seasonal feedbacks slowed the rate of autumn vegetation greening of the Northern Hemisphere.
study area and precipitation anomalies

Feng Wang publishes new article on precipitation variability in the Qinghai-Tibet Plateau

In a new article in Geophysical Research Letters, Wang et al. use a millennial tree-ring reconstruction and climate simulations to show that recent humidification of the Qinghai-Tibet Plateau is exceptional and that wet-to-dry transitions are unprecedented over the past millennium.
Johnston et al 2025, JGR

Miriam Johnston publishes new research on plant responses to vapor pressure deficit

In a new paper in Journal of Geophysical Research: Biogeosciences, Miriam Johnston shows that carbon and water fluxes of U.S. ecosystems respond differently to vapor pressure deficit if it's driven by high temperatures than if it's driven by low humidity.
Capture Your Research award winner Riley Pacer

Riley Pacer wins graduate student Capture Your Research award

Friday, March 7, 2025
Graduate student Riley Pacer was awarded first place in University of Iowa's 2024 Capture Your Research graduate division for her photo of the Ashton Prairie flux tower.