... of naturally seeped oil into sinking particles. Determination of post-spill baselines for these isotopic signatures allows for evaluation of anthropogenic inputs in future. 10 10 2017 12 05 2018 Copyright: © 2018 The Author(s) 2018 This is an open-access article distributed under the terms...

... isotopes (δ 13 CO and δC 18 O) in air during the winters of 2013–14 and 2014–15 at tall tower sampling sites in and around Indianapolis, USA. A tower located upwind of the city was used to quantitatively remove the background CO signal, allowing for the first unambiguous isotopic characterization...

...Sae Yun Kwon; Joel D. Blum; Daniel J. Madigan; Barbara A. Block; Brian N. Popp; Jody W. Deming; Tamar Barkay Analyses of mercury (Hg) isotope ratios in fish tissues are used increasingly to infer sources and biogeochemical processes of Hg in natural aquatic ecosystems. Controlled experiments...