Auflistung Alle Publikationen nach Mitwirkenden "Sigman, Daniel M."
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Ice Age‐Holocene Similarity of Foraminifera‐Bound Nitrogen Isotope Ratios in the Eastern Equatorial Pacific
Studer, Anja S.; Mekik, Figen; Ren, Haojia; Hain, Mathis P.; Oleynik, Sergey; Martínez‐García, Alfredo; Haug, Gerald H.; Sigman, Daniel M. (Paleoceanography and Paleoclimatology, 2021-05-19)Bulk sediment δ15N records from the eastern tropical Pacific (ETP) extending back to the last ice age most often show low glacial δ15N, then a deglacial δ15N maximum, followed by a gradual decline to a late Holocene δ15N ... -
Laboratory Assessment of the Impact of Chemical Oxidation, Mineral Dissolution, and Heating on the Nitrogen Isotopic Composition of Fossil‐Bound Organic Matter
Martínez‐García, Alfredo; Jung, Jonathan; Ai, Xuyuan E.; Sigman, Daniel M.; Auderset, Alexandra; Duprey, Nicolas N.; Foreman, Alan; Fripiat, François; Leichliter, Jennifer; Lüdecke, Tina; Moretti, Simone; Wald, Tanja (Geochemistry, Geophysics, Geosystems, 2022-08-19)Fossil‐bound organic material holds great potential for the reconstruction of past changes in nitrogen (N) cycling. Here, with a series of laboratory experiments, we assess the potential effect of oxidative degradation, ... -
The Nitrogen Isotopic Composition of Tissue and Shell-Bound Organic Matter of Planktic Foraminifera in Southern Ocean Surface Waters
Smart, Sandi M.; Fawcett, Sarah E.; Ren, Haojia; Schiebel, Ralf; Tompkins, Emily M.; Martínez-García, Alfredo; Stirnimann, Luca; Roychoudhury, Alakendra; Haug, Gerald H.; Sigman, Daniel M. (Geochemistry, Geophysics, Geosystems, 2020)We present the first nitrogen isotope (δ15N) measurements of planktic foraminifera, paleoceanographically important zooplankton, from the nutrient-rich waters of the modern Southern Ocean. Foraminifera were collected from ...