A5016695556- Geology and Paleoclimatology Research
- Climate change and permafrost
- Methane Hydrates and Related Phenomena
- Marine and coastal ecosystems
- Hydrocarbon exploration and reservoir analysis
- Geological Studies and Exploration
- Indigenous Studies and Ecology
- Cryospheric studies and observations
- Microbial Community Ecology and Physiology
- Paleontology and Stratigraphy of Fossils
- Polar Research and Ecology
- Pleistocene-Era Hominins and Archaeology
- Protist diversity and phylogeny
- Algal biology and biofuel production
- Arctic and Russian Policy Studies
- Atmospheric and Environmental Gas Dynamics
- Isotope Analysis in Ecology
- Geological and Geophysical Studies
- Groundwater and Isotope Geochemistry
- Fire effects on ecosystems
- Environmental DNA in Biodiversity Studies
- Geological formations and processes
- Archaeology and ancient environmental studies
- Diatoms and Algae Research
- Analytical Chemistry and Chromatography
Macalester College
2022-2024
Brown University
2013-2021
Woods Hole Oceanographic Institution
2018-2019
John Brown University
2015
Abstract Members of the order Isochrysidales are unique among haptophyte lineages in being exclusive producers alkenones, long‐chain ketones that commonly used for paleotemperature reconstructions. Alkenone‐producing haptophytes divided into three major groups based largely on molecular ecological data: Group I is found freshwater lakes, II occurs brackish and coastal marine environments, III consists open ocean species. Each group has distinct alkenone distributions; however, only Groups...
Rationale Measurements of alkenone unsaturation ratios are widely used for paleotemperature reconstructions in ocean and lake environments. Previously, we reported the discovery a series tri‐unsaturated positional isomers (Δ 14, 21, 28 ) from oligosaline freshwater lakes Greenland Alaska. In this work provide detailed analysis structures isotopic compositions ( δ 13 C 2 H) alkenones produced by “Greenland haptophyte”. Methods Alkenones were extracted sediments Lake BrayaSø, Greenland....