Groundwater age dating with chlorofluorocarbons
Abrasiveness also seems to be the one quality currently shared by most political appointees and prominent heads of state. Acid: a substance with a p H less than 7 due to prevalent hydrogen ions. The human stomach contains hydrochloric acid with a p H of 1; battery acid is stronger, but not by much. Acid Rain: precipitation heavy with nitric and sulfuric acid.Most of it is generated by sulfur dioxide and nitrogen dioxide (air pollution). Results include fish and plant deaths, corrosion, groundwater pollution, and soil erosion. Actinomycetes: formerly classified as fungi because of their filaments, the actinomycetales include many types of soil bacteria.CFC-12 (CCl) was first released to the atmosphere in the 1960’s.The atmospheric concentrations of these CFCs increased until 1993 for CFC-113, 1994 for CFC-11, and 2004 for CFC-12 and decreased since the maximum concentrations were reached.The technique of using CFC’s as transient tracers to derive estimates of seawater ventilation ages is well established and the use of these tracers to derive estimates of groundwater recharge age is becoming increasingly common.CFCs are potentially useful tracers of groundwater flow because they are non-reactive and their input history is well known.The recent decreasing CFC concentrations have complicated their use as transient tracers because in some cases two ages are possible.SF signature based on the atmospheric concentration and the temperature dependent solubility coefficient of each compound.
The glossary that follows assumes a definition of ecology--the study of interactions between organisms and their environment--much wider than what fits under the field's habitual statistical persona.
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