THE SESSION DEDICATED TO TOM BULLEN’S MEMORY

Innovative Methods for Characterizing Metal and Nutrient Budgets in the Present and Past Terrestrial and Aquatic Environments

Recent analytical developments of isotope systematics in the past and present terrestrial and aquatic ecosystems, have resulted in an unprecedented increase in the volume of research on that topic. Similarly, advances in geochemical understanding of metal mobility in natural environments has increased. The aim of this session is to explore methods, tracers and research applications that will provide

i) stronger constraints on the origin(s) of elements,

ii) a better characterization of the processes controlling their budgets and

iii) historical records of variations of their cycles in the Environment (soil, sediment, water, air) at local and global scales.

The aim of this session is also to integrate complementary approaches to provide new insights into metal mobility. The session will explore new methods, tracers and applications using innovative spectroscopic techniques and multi-isotopic systematics that will provide stronger constraints on the origin (both natural and anthropogenic) and better characterization of the processes controlling the geochemical behavior of metals, metalloid, and nutrient contaminants in the environment (e.g., soil, sediment, water, air) at local and global scales. We aim to bring together experts from different communities to enhance the dialogue required for future collaborations.

TOM BULLEN

(1950-2018)

Thomas Darwin Bullen, a Research Hydrologist at the U.S. Geological Survey and a former Secretary of the International Association of GeoChemistry (IAGC) from 2008 to 2014, passed away on Sept. 7, 2018. Tom’s primary research focused on the use of metal and metalloid isotopes (e.g., Cr, Fe, Ca, B, Se and Te stable isotopes and Sr radiogenic isotopes) and water chemistry to understand hydrologic and biogeochemical processes at scales ranging from mineral-water interfaces to water flow paths in watersheds and regional aquifers.