Search
Now showing items 1-3 of 3
The geochemistry of methane isotopologues
(Massachusetts Institute of Technology, 2017)
This thesis documents the origin, distribution, and fate of methane and several of its isotopic forms on Earth. Using observational, experimental, and theoretical approaches, I illustrate how the relative abundances of ...
Ecosystem metabolism in salt marsh tidal creeks and ponds : applying triple oxygen isotopes and other gas tracers to novel environments
(Massachusetts Institute of Technology, 2017)
Salt marshes are physically, chemically, and biologically dynamic environments found globally at temperate latitudes. Tidal creeks and marshtop ponds may expand at the expense of productive grass-covered marsh platform. ...
Scavenging and transport of thorium radioisotopes in the North Atlantic Ocean
(Massachusetts Institute of Technology, 2018)
Many chemical constituents are removed from the ocean by attachment to settling particles, a process referred to as "scavenging." Radioisotopes of thorium, a highly particle-reactive element, have been used extensively to ...