Jocelyn Turnbull

TL;DR: This work shows that nitrogen additions significantly accelerate decomposition of light soil carbon fractions (with decadal turnover times) while further stabilizing soil carbon compounds in heavier, mineral-associated fractions ( with multidecadal to century lifetimes).

TL;DR: Reconstructed 14C activities varied substantially during the last glacial period, including sharp peaks synchronous with the Laschamp and Mono Lake geomagnetic field intensity minimal and cosmogenic nuclide peaks in ice cores and marine sediments, and simulations with a geochemical box model suggest much of the variability can be explained by geomagnetically modulated changes in 14C production rate together with plausible changes in deep-ocean ventilation and the global carbon cycle during glaciation.

TL;DR: An expanded Cariaco Basin 14C chronology is tied to 230Th-dated Hulu Cave speleothem records in order to provide detailed marine-based 14C calibration for the past 50,000 years.

TL;DR: In this paper, the authors developed the first comprehensive monitoring system of CO2 emissions at high resolution over the city of Indianapolis using a uniquely dense network of surface towers measuring continuously the atmospheric concentrations of greenhouse gases (GHGs).

TL;DR: In this article, the authors used the nearly ideal tracer 14CO2 to estimate the fossil fuel CO2 enhancement in boundary layer air at two sites in New England and Colorado.