Carbonaceous aerosols are critical, short-lived climate forcers (SLCFs) that play complex roles in the climate system through their interaction with solar radiation, cloud nucleation, and are also a major contributor to air pollution. Globally and within the Arctic, changing aer…
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Prediction of future climate change relies on the accuracy of models that can be calibrated using paleoclimate proxy data. The longest and most continuous records are based on marine sediment and ice cores, but cannot be dated using absolute radiometric techniques. Analyses of s…
The hydroclimate of the Iberian Peninsula has been suggested to be persistently dry during Medieval times due to a persistently positive North Atlantic Oscillation (NAO) mode (Trouet et al., 2009). However, modeling results and proxy records from the region indicate that substan…
The potential of Arctica islandica, a long lived marine bivalve with a lifespan of over 300 years, to reconstruct a high resolution (sub-annual) climate record is explored in this thesis. Fluctuations in trace element and isotopic data from live-collected specimens from Irvine B…
The sedimentary deposits of the Hadar Formation at Dikika and the Mount Galili Formation at Galili preserve a wealth of paleoenvironmental and paleoclimatic records spanning the last 5.29 Ma. Stable carbon and oxygen isotopic compositions of herbivore tooth enamel were analyzed …
Reconstruction of terrestrial paleoenvironments in ancient soils (paleosols) is analytically challenging if the organic carbon content is less than ~0.5% (low-organic-carbon soils). Lipid biomarkers derived from vascular plant waxes, specifically n -alkane homologues C25 through…