Coral geochemical tracers have been used in studies of the paleoclimatology and paleoceanography tropics subtropics. We measured Sr/Ca oxygen isotope ratios (δ 18 O) a coral sample collected from southern part Lombok Strait, significant outlet Indonesian Throughflow (ITF) to Indian Ocean, reconstruct historical record sea surface temperature (SST) seawater δ O. Seawater O can be approximate sal...

Abstract. The aim of paleoclimate studies resolving climate variability from noisy proxy records can in essence be reduced to a statistical problem. challenge is extract meaningful information about these by reducing measurement uncertainty through combining measurements for proxies while retaining the temporal resolution needed assess timing and duration variations parameters. In this study, w...

Recurrence networks are a powerful nonlinear tool for time series analysis of complex dynamical systems. While there are already many successful applications ranging from medicine to paleoclimatology, a solid theoretical foundation of the method has still been missing so far. Here, we interpret an ɛ-recurrence network as a discrete subnetwork of a "continuous" graph with uncountably many vertic...

Abrupt climate changes, especially at millennial timescales, have become a key topic in paleoclimatology because of their link with the tipping point theory and extensive impacts on future scenarios. Although best documented ice-cores marine sediments, they are also recorded different archives land, among which Chinese loess speleothem records particular interest. These effectively document orb...

stable isotope analysis, being used in many research areas, has also been applied in archaeology during the last three decades to address questions regarding the paleoclimatology and ancient diet, mobility and migration. despite the growing number of the application of stable isotope analysis in archaeological studies, there is a very few research in this regard in archaeology of iran. this res...

The ‘*O/r60 ratios of cellulose and the D/H ratios of cellulose nitrate were determined for linen, a textile produced from the fibers of the flax plant Linum usitatissimum, and for maize (Zea mays) from a variety of geographic locations in Europe, the Middle East, and North and South America. The regression lines of bD values on 6”O values had slopes of 5.4 and 5.8 for the two species. Statisti...

Oxygen atoms within fossil wood provide high-resolution records of climate change, particularly for the Quaternary. However, current analysis methods of fossil cellulose do not differentiate between different positions of the oxygen atoms. Here, we propose a refinement to tree-cellulose paleoclimatology modeling, using the cellulose-derived compound phenylglucosazone as the isotopic substrate. ...

where he is also Director of the Center for the Environment. He currently serves on President Obama's Council of Advisors on Science and Technology. He has authored more than one hundred articles on topics in geochemistry, geology, paleoclimatology, ocean-ography, energy technology, and energy policy. Over the last ten years, technological innovation has transformed U.S. energy resources. Geolo...