A5059773774- Coral and Marine Ecosystems Studies
- Geology and Paleoclimatology Research
- Paleontology and Stratigraphy of Fossils
- Ocean Acidification Effects and Responses
- Calcium Carbonate Crystallization and Inhibition
- Marine and fisheries research
- Isotope Analysis in Ecology
- Marine Biology and Ecology Research
- Ichthyology and Marine Biology
- Methane Hydrates and Related Phenomena
- Marine Bivalve and Aquaculture Studies
- Hydrocarbon exploration and reservoir analysis
- Cephalopods and Marine Biology
- Geological and Geophysical Studies
- Astro and Planetary Science
- Marine animal studies overview
- Marine and environmental studies
- Minerals Flotation and Separation Techniques
- Geochemistry and Elemental Analysis
- Marine and coastal plant biology
- Planetary Science and Exploration
- Geomagnetism and Paleomagnetism Studies
- Marine and coastal ecosystems
- Ionosphere and magnetosphere dynamics
- Groundwater and Isotope Geochemistry
University of Washington
2014-2024
Lawrence Berkeley National Laboratory
2010-2015
Woods Hole Oceanographic Institution
2015
Seattle University
2014
California Institute of Technology
2006-2014
The Sr/Ca ratio of coral aragonite is used to reconstruct past sea surface temperature (SST). Twenty‐one laboratories took part in an interlaboratory study measurements. Results show bias can be significant, and the extreme case could result a range SST estimates 7°C. However, most data fall within narrower Porites reference material JCp‐1 now characterized well enough have certified value 8.838 mmol/mol with expanded uncertainty 0.089 following International Association Geoanalysts (IAG)...
Plankton, corals, and other organisms produce calcium carbonate skeletons that are integral to their survival, form a key component of the global carbon cycle, record an archive past oceanographic conditions in geochemistry. A aspect formation these biominerals is interaction between organic templating structures mineral precipitation processes. Laboratory-based studies have shown atomic-scale processes can profoundly influence architecture composition minerals, but importance calcifying...
The relationship between seawater temperature and the average Mg/Ca ratios in planktic foraminifera is well established, providing an essential tool for reconstructing past ocean temperatures. However, many species display alternating high low Mg-bands within their shell walls that cannot be explained by alone. Recent experiments demonstrate intrashell Mg variability Orbulina universa, which forms a spherical terminal shell, paced diurnal light/dark cycle. Whether Mg-heterogeneity also...
Assemblages of megabenthos are structured in seven depth-related zones between ∼700 and 4000 m on the rocky topographically complex continental margin south Tasmania, southeastern Australia. These patterns emerge from analysis imagery specimen collections taken a suite surveys using photographic situ sampling by epibenthic sleds, towed video cameras, an autonomous underwater vehicle remotely operated (ROV). Seamount peaks shallow had relatively low biomass diversity assemblages, which may be...
In this study we use microsampling techniques to explore diagenetic processes in carbonates. These are important as they can affect the accuracy of U series chronometry. Fission track maps deep‐sea scleractinian corals show a threefold difference between minimum and maximum [U] modern corals, which is reduced factor 2 fossil corals. We micromilling MC‐ICP‐MS make detailed analyses δ 234 initial distributions from 218 ka modern. Within each coral observe large range values, with high values...
The concentration and spatial distribution of major (Ca, Mg) trace elements (Na, Sr, S, Li, Ba, Pb, U) in different Corallium skeletons (C. rubrum, C. japonicum, elatius, konojoi) have been studied by electron microprobe (EMP) laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS). EMP data show positive Na-Mg negative Na-S Mg-S correlations all skeletons. LA-ICPMS display additional Sr-Mg, Li-Mg, U-Mg correlations. Medullar zones the skeletons, corresponding to fast growing...
Mg/Ca and Sr/Ca ratios in calcium carbonate are important components of many palaeoclimate studies. We present an isotope dilution method relying on a single mixed spike containing 25 Mg, 43 Ca 87 Sr. Dozens samples per day, as small 10 μg carbonate, could be dissolved, spiked run ICP‐MS with precision 0.8% (2 RSD). Two instruments types, sector field quadrupole ICP‐MS, were compared. The best long term found was 0.4% RSD), although this increased by up to factor two when very different Mg...
Abstract We designed and developed a system to efficiently extract dissolved inorganic carbon (DIC) from seawater groundwater samples for radiocarbon dating. The Rapid Extraction of Dissolved Inorganic Carbon System (REDICS) utilizes gas‐permeable polymer membrane contactor the DIC an acidified water sample in form dioxide (CO 2 ), introduce it helium gas stream, cryogenically isolate it, store stable isotope analysis. REDICS offers multiple advantages extraction method which has been used...