3 results match your criteria: "Department of Earth Sciences Faculty of Geosciences Utrecht University Utrecht The Netherlands.[Affiliation]"
Article Synopsis
- The distribution of modern shallow-water tropical corals is primarily influenced by temperature, thriving only in waters above 16-18°C year-round.
- Researchers tested whether solar radiation limits the spread of coral reefs toward the poles during warmer climates, using a new model for coral calcification.
- Findings indicate that calcification rates significantly decline past 40° latitude and severely drop after 50° latitude due to less winter daylight, implying that light availability restricts coral reef expansion, not temperature alone, and that fossil coral distribution is not a reliable indicator for water temperatures in these areas.
The Paleocene-Eocene Thermal Maximum (PETM) is recognized globally by a negative excursion in stable carbon isotope ratios (δC) in sedimentary records, termed the carbon isotope excursion (CIE). Based on the CIE, the cause, duration, and mechanisms of recovery of the event have been assessed. Here, we focus on the role of increased organic carbon burial on continental margins as a key driver of CO drawdown and global exogenic δC during the recovery phase.
View Article and Find Full Text PDFNegligible Quantities of Particulate Low-Temperature Pyrogenic Carbon Reach the Atlantic Ocean via the Amazon River.
Global Biogeochem Cycles
September 2021
Particulate pyrogenic carbon (PyC) transported by rivers and aerosols, and deposited in marine sediments, is an important part of the carbon cycle. The chemical composition of PyC is temperature dependent and levoglucosan is a source-specific burning marker used to trace low-temperature PyC. Levoglucosan associated to particulate material has been shown to be preserved during riverine transport and marine deposition in high- and mid-latitudes, but it is yet unknown if this is also the case for (sub)tropical areas, where 90% of global PyC is produced.
View Article and Find Full Text PDF