Global change encompasses changes in the characteristics of inter-related climate variables
in space and time, and derived changes in terrestrial processes, including human activities …

Paleosols (fossil soils) are preserved throughout the geologic record in depositional settings
ranging from alluvial systems to between basalt flows. Until recently, paleosols were studied …

The images or other third party material in this book are included in the work's Creative
Commons license, unless indicated otherwise in the credit line; if such material is not …

In contrast to most other fields of noble gas geochemistry that mostly regard atmospheric
noble gases as' contamination,'air-derived noble gases make up the far largest and hence …

A 30,000-year paleotemperature record derived from noble gases dissolved in carbon-14-
dated ground water indicates that the climate in lowland Brazil (Piaui Province, 7° S, 41.5° …

Sulfur hexafluoride (SF6) is primarily of anthropogenic origin but also occurs naturally. The
troposphere concentration of SF6 has increased from a steady state value of 0.054±0.009 to …

Several studies have used the temperature dependence of gas solubilities in water to derive
paleotemperatures from noble gases in groundwaters. We present a general method to infer …

Large discrepancies in published neon and nitrogen solubility data limit the interpretation of
oceanic measurements of these gases. We present new solubility measurements for neon …

Geochemistry has contributed significantly to the understanding of ground-water systems
over the last 50 years. Historic advances include development of the hydrochemical facies …

One of the principal uses of environmental tracers is for determining the ages of soil waters
and groundwaters.(We may refer to this as 'hydrochronology'by analogy with the dating of …