1. Earth and Environmental Sciences Program The City University of New York Graduate Center New York NY USA
2. Department of Earth and Atmospheric Sciences City University of New York City College New York NY USA
3. Smithsonian Environmental Research Center Edgewater MD USA
4. Department of Chemistry College of Environmental Science and Forestry State University of New York Syracuse NY USA
5. Analytical Biogeochemistry German Research Center for Environmental Health Neuherberg Germany
6. Chesapeake Biological Laboratory University of Maryland Center for Environmental Science Solomons MD USA