@article{f66ff9422780432ba7341889cfd5c483,
title = "Seasonal Evolution of Canopy Stomatal Conductance for a Prairie and Maize Field in the Midwestern United States from Continuous Carbonyl Sulfide Fluxes",
abstract = "There are inherent challenges in scaling stomatal conductance (g (Formula presented.)) from leaf to canopy particularly over seasonal time scales when species distribution and canopy structure evolve. We address this gap using carbonyl sulfide (OCS) and CO (Formula presented.) fluxes from a predominantly C3 prairie and C4 maize field in the midwestern United States. The g (Formula presented.) derived from OCS fluxes captured a transition in the stomatal limitation on gross primary productivity (GPP) through the growing season as well as seasonally persistent g (Formula presented.) dynamics such as temperature optimum and a positive response of nighttime g (Formula presented.) to vapor pressure deficit. Near the termination of the prairie growing season, we observed a decrease in the relative OCS to CO (Formula presented.) flux that we hypothesize emerged from a rising contribution of C4 plants to productivity. The results show how plot-scale OCS and CO (Formula presented.) fluxes can be used as a trace gas diagnostic for transitions in the limiting factors for community GPP.",
keywords = "Canopy dynamics, Carbon cycle, Carbonyl sulfide, Prairie, Terrestrial ecosystems, Water cycle",
author = "M. Berkelhammer and B. Alsip and R. Matamala and D. Cook and Whelan, {M. E.} and E. Joo and C. Bernacchi and J. Miller and T. Meyers",
note = "Funding Information: We acknowledge the Illinois Water Resources Center for their financial support; Department of Energy staff and researchers at Argonne National Laboratory and Fermilab National Accelerator Laboratory for access and maintenance of the Fermilab field site; Chris Whelan (UIC) for support on species identification; Francois Ritter for assistance with the Energy Farm field installation; Jenny Bueno, Omar Ortiz, and Lucero Serrano for assistance with the soil incubation experiments; the UIC Earth and Environmental Sciences Soils and the Environment class for assistance in soil sampling; and Ari Berland and John Balediata for assistance with the Bondville field installation. Stephen Montzka for the unpublished carbonyl sulfide flask measurements from LEF (ftp://ftp.cmdl.noaa.gov/hats/carbonyl_sulfide/). Laura Hildebrand, Jimmy Zhou and Mark Potosnak for assistance with installation at the EPA AQS site. All data from this project are currently available at https://data.ess-dive.lbl.gov/view/doi:10.15485/1603451. Publisher Copyright: {\textcopyright}2020. American Geophysical Union. All Rights Reserved.",
year = "2020",
month = mar,
day = "28",
doi = "10.1029/2019GL085652",
language = "English (US)",
volume = "47",
journal = "Geophysical Research Letters",
issn = "0094-8276",
publisher = "American Geophysical Union",
number = "6",
}