[1] Here we present near-annually resolved oxygen isotope records from two species of planktic foraminifera from the Cariaco Basin that reflect sea surface temperature (SST) and Intertropical Convergence Zone (ITCZ) precipitation-related salinity variations over the Caribbean and tropical North Atlantic spanning the last 2000 years. A strong, broad spatial pattern of correlation exists between ...

The Mg/Ca of marine calcareous Planktic Foraminifera (PF) shells is commonly used for sea surface temperature reconstructions. However, compared to open environments, hypersaline (>40) oligotrophic seas have been shown accommodate PF with higher and divergent relationships. To investigate influencing factors Mg uptake in regions, we measured the two flux-dominating species, Globigerinoides rube...

Field investigation, Microfacies analysis, and biostratigraphy have been carried out in the central parts of Ionian Basin (Aetoloakarnania area, Western Greece) order to decipher depositional environments that developed during accumulation Upper Cretaceous Eocene carbonate succession. Three different Standard types (SMF) observed, corresponding two (Facies Zones or FZ) a platform progradation. ...

Abstract. Oxygen-depleted regions of the global ocean are rapidly expanding, with important implications for biogeochemical cycles. However, our ability to make projections about future oxygen in is limited by a lack empirical data which test and constrain behavior climatic oceanographic models. We use depth-stratified plankton tows demonstrate that some species planktic foraminifera adapted li...

[1] Broecker and Clark [2002] use the ‘‘size normalized weight’’ of planktic foraminifera to estimate the carbonate ion concentration ([CO3 ]) of Atlantic glacial upper deep water. This method was introduced by Lohmann [1995] and is based on the fact that, within a defined size fraction, dissolution decreases shell weight in proportion to the degree of undersaturation with respect to CaCO3. On ...

Many methods are available for estimating ancestral values of continuous characteristics, but little is known about how well these methods perform. Here we compare six methods: linear parsimony, squared-change parsimony, one-parameter maximum likelihood (Brownian motion), two-parameter maximum likelihood (Ornstein-Uhlenbeck process), and independent comparisons with and without branch-length in...