PP23A:
Biomarkers from Source to Sink: Proxy Development, Mechanistic Theory, and Applications I


Submit an Abstract to this Session


Session ID#: 59489

Session Description:
Molecular fossils (biomarkers) can provide crucial information on the operation of Earth’s climate system, ecology, and biogeochemistry in the past through changes in their (relative) abundance and/or their isotopic composition. Interpretations of molecular and isotopic signals from biomarkers in sediments are typically grounded in empirical correlations. Developing mechanistic understandings of how environmental factors influence biosynthesis, and how biomarker signals are modified through transport and deposition, increases the value of these data and expands opportunities for their application. This session aims to bring together the organic geochemical and paleoclimate communities to further explore biomarker proxies. We welcome investigations of biomarker synthesis, transport, and post-depositional alteration, in addition to biomarker-based reconstructions of key aspects of Earth’s system on all time scales and from any depositional environment. We also encourage contributions that integrate biomarker proxies with modeling to obtain a more holistic understanding of the climate system.
Primary Convener:  Nemiah Ladd, ETH Swiss Federal Institute of Technology Zurich, Earth Sciences, Zurich, Switzerland
Conveners:  Yige Zhang, Yale University, Department of Geology and Geophysics, New Haven, United States, William Daniels, University of Massachusetts Amherst, Amherst, MA, United States and Bernhard David Naafs, University of Bristol, Department of Earth Sciences & Department of Chemistry, Bristol, United Kingdom
Primary Liaison:  Nemiah Ladd, University of Washington, Seattle, WA, United States
Chairs:  Nemiah Ladd, University of Washington, Seattle, WA, United States and Bernhard David Naafs, University of Bristol, Department of Earth Sciences & Department of Chemistry, Bristol, United Kingdom
OSPA Liaison:  William Daniels, University of Minnesota Duluth, Department of Earth, Geographic and Climate Sciences, Duluth, United States

Cross-Listed:
  • B - Biogeosciences
Index Terms:

0424 Biosignatures and proxies [BIOGEOSCIENCES]
0473 Paleoclimatology and paleoceanography [BIOGEOSCIENCES]
4912 Biogeochemical cycles, processes, and modeling [PALEOCEANOGRAPHY]
4924 Geochemical tracers [PALEOCEANOGRAPHY]

Abstracts Submitted to this Session:

What are global empirical calibrations hiding? The case of brGDGT membrane lipids (Invited) (386729)
Cindy De Jonge, University of Antwerp, Biology, Wilrijk, Belgium, Dajana Radujković, University of Antwerp, Biology, Antwerp, Belgium, Ivan A. Janssens, University of Antwerp, Department of Biology, Antwerp, Belgium, James Weedon, University of Antwerp, Antwerp, Belgium, Eiko E Kuramae, Netherlands Institute of Ecology, Wageningen, Netherlands and Francien Peterse, Utrecht University, Department of Earth Sciences, Utrecht, Netherlands
Global Patterns in Wetland Biomarker Stable Carbon Isotopic Compositions and Implications for Past Reconstructions of Methane Cycling (366469)
Gordon Neil Inglis1, Bernhard David Naafs2, Yanhong Zheng3, Judith Schellekens4 and Richard Pancost2, (1)University of Bristol, Organic Geochemistry Unit, School of Chemistry, Bristol, United Kingdom, (2)University of Bristol, Department of Earth Sciences & Department of Chemistry, Bristol, United Kingdom, (3)Northwest University, Department of Geology, Xi’an, China, (4)University of São Paulo, Department of Soil Science, Piracicaba, Brazil
Analysis of Sterol Diagenesis Stages in a Peat Core from Kamchatka, Russia (465644)
Tiara Ogus, SUNY College of Environmental Science and Forestry, Syracuse, NY, United States, Jonathan E Nichols, LDEO-Biology & Paleoenvironment, Palisades, United States, Dorothy M Peteet, NASA Goddard Institute for Space Studies, New York, NY, United States and Andrej Andreev, University of Cologne, Institute of Geology and Mineralogy, Cologne, Germany
Reconstructing Arctic Ocean salinity with hydrogen isotopes in palmitic acid (421170)
Julian P Sachs1, Rüdiger Stein2, Ashley E Maloney1, Matthew David Wolhowe1, Kirsten Fahl3 and Seung-il Nam4, (1)University of Washington, School of Oceanography, Seattle, WA, United States, (2)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Bremerhaven, Germany, (3)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Marine Geology, Bremerhaven, Germany, (4)Korea Polar Research Institute, Incheon, South Korea
A calibration of hydrogen isotope ratios of sedimentary plant waxes as a proxy for meteoric water in the Arctic (371265)
Jamie McFarlin, University of Colorado at Boulder, Geological Sciences, Boulder, CO, United States, Magdalena R Osburn, Northwestern University, Earth and Planetary Sciences, Evanston, IL, United States, Yarrow Axford, Northwestern University, Earth, Environmental, and Planetary Sciences, Evanston, IL, United States and Andrew Masterson, Northwestern University, Evanston, IL, United States
A new forward model of leaf wax hydrogen isotope ratios to bridge proxy and model estimates of past climate (350455)
Dr. Bronwen L Konecky, Washington University in St Louis, Earth and Planetary Sciences, St. Louis, MO, United States, Sylvia Dee, Rice University, Earth, Environmental, and Planetary Sciences, Houston, TX, United States and David Noone, University of Auckland, Department of Physics, Auckland, New Zealand

See more of: Paleoceanography and Paleoclimatology