Leaf teeth are conspicuous and often diagnostic features of many plant species. In mesic environments with sufficient nutrient resources, the percentage of toothed species in extant floras generally correlates negatively with temperature; consequently, fossil leaf teeth are widely used to estimate continental paleotemperatures. However, the function of leaf teeth with respect to climate is poor...

Understanding how and why diversification rates vary across evolutionary time is central to understanding how biodiversity is generated and maintained. Recent mathematical models that allow estimation of diversification rates across time from reconstructed phylogenies have enabled us to make inferences on how biodiversity copes with environmental change. Here, we explore patterns of temporal di...

Abstract Pronounced global cooling around the Eocene–Oligocene transition (EOT) was a pivotal event in Earth’s climate history, controversially associated with opening of Drake Passage. Using physical laboratory model we revisit fluid dynamics this marked reorganization ocean circulation. Here show, seemingly contradicting paleoclimate records, that our experiments pathway yields higher values ...

Validation of the decadal to centennial timescale variability of coupled climate models is limited by the scarcity of long observational records. Proxy indicators of climate, such as tree rings, ice cores, etc., can be utilized for this purpose. This study presents a quantitative comparison of the variability of the third version of the Hadley Centre ocean–atmosphere coupled model with a networ...

The La Cantera Formation (Aptian) represents an underfilled lake system developed in extensional basin during the Cretaceous hothouse and it bears abundant diverse fossil record. Our goal was to investigate paleoclimate conditions of unit from a multiproxy approach. We analyzed two proxies: a) stable isotope (carbon oxygen) composition basal Actinopterygii Neopterygii fish remains indeterminate...

The main purpose of the paper is to create an optimal strategy for field testing wedge ice isotope and radiocarbon analyses. scientific significance this task need a detailed isotopic characterization well-dated sections with wedges. solution problem will allow us obtain complete paleotemperature scenario Holocene late Pleistocene in north Western Siberia, northern central Yakutia, Chukotka, Ar...