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Environmental Mercury Mapping, Modeling, and Analysis (EMMMA)

EMMMA supports mercury research and decision-making by providing tools for Mapping, Modeling, and Analysis of mercury data.

Understanding the causes and consequences of Hg contamination in the environment is a problem of enormous geographic scope and scientific complexity. Effectively addressing this task requires the integration of data and expertise from many scientific disciplines. The Environmental Mercury Mapping, Modeling, and Analysis (EMMMA) website, a joint effort of USGS and NIEHS, is designed to support environmental and health researchers, as well as land and resource managers by providing tools.


EMMMA: A web-based system for environmental mercury mapping, modeling, and analysis

Mercury in our environment - in our air, water, soil, and especially our food - poses significant hazards to human health, particularly for developing fetuses and young children. Because of the importance of this issue and the length of time it has been studied, large and complex data sets of mercury concentrations in various media and associated ancillary data have been generated by many Federal,
Paul P. Hearn,, Stephen P. Wente, David I. Donato, John J. Aguinaldo

A statistical model and national data set for partioning fish-tissue mercury concentration variation between spatiotemporal and sample characteristic effects

Many Federal, Tribal, State, and local agencies monitor mercury in fish-tissue samples to identify sites with elevated fish-tissue mercury (fish-mercury) concentrations, track changes in fish-mercury concentrations over time, and produce fish-consumption advisories. Interpretation of such monitoring data commonly is impeded by difficulties in separating the effects of sample characteristics (speci
Stephen P. Wente