A5010439742- Geology and Paleoclimatology Research
- Marine Biology and Ecology Research
- Isotope Analysis in Ecology
- Oceanographic and Atmospheric Processes
- Paleontology and Stratigraphy of Fossils
- Climate variability and models
- Marine Bivalve and Aquaculture Studies
Cardiff University
2017-2019
Abstract The lack of long‐term, highly resolved (annual to subannual) and absolutely dated baseline records marine variability extending beyond the instrumental period (last ~50–100 years) hinders our ability develop a comprehensive understanding role ocean plays in climate system. Specifically, without such records, it remains difficult fully quantify range natural mediated by robustly attribute recent changes anthropogenic or drivers. Here we present 211 year (1799–2010 C.E.; all dates...
Abstract The Mg/Ca ratio of foraminiferal calcite is a widely used empirical proxy for ocean temperature. Foraminiferal Mg/Ca‐temperature relationships are based on extant species and species‐specific, introducing uncertainty when applying them to the fossil tests extinct groups. Many modern show remarkable heterogeneity in their intra‐test Mg distributions, typically due presence high bands, which have biological origin. Importantly, banding patterns differ between species, could affect...
Abstract Our understanding of North Atlantic Ocean variability within the coupled climate system is limited by brevity instrumental records and a deficiency absolutely dated marine proxies. Here we demonstrate that spatial network stable oxygen isotope series derived from molluscan sclerochronologies (δ 18 O shell ) can provide skillful annually resolved reconstructions key components with absolute dating precision. Analyses common δ variability, using principal component analysis, highlight...
The combined influence of temperature and the isotopic composition seawater (δ18Ow) often precludes use oxygen isotope (δ18O) records, derived from marine carbonates, to reconstruct absolute temperatures, without application an independent δ18Ow proxy. Here we investigate carbon records (δ13Cshell), long-lived bivalve Glycymeris glycymeris, as a proxy for variability. Our analyses indicate G. glycymeris δ13Cshell data growth increments >20 years age contain strong ontogenetic trends (−0.013‰...