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Earth and Environmental Sciences
Vinton Professor of Earth and Environmental Engineering
Earth and Environmental Sciences
139 Comer
61 Route 9W - PO Box 1000
(845) 365-8176


Fields of interest: 
Aqueous Geochemistry, Physical Oceanography, Climate, Contaminant Transport.

My research focuses on the application of noble gases and other isotopes to natural systems with emphasis on the oceans and groundwater. My research is directed to understanding the natural state of these water bodies, the human perturbation of the natural state, and the possibility to design engineering solutions to the problems caused by human impact. The problems we are working on range from basic studies of circulation patterns of water in the ocean and groundwater flow systems to the variability of the oceanic circulation under natural and anthropogenically forced conditions or the transport and transformation of contaminants. Other projects include paleoclimate and paleocirculation studies.

For most of our studies, we use trace substances of natural or anthropogenic origin (isotopes or chemical compounds). In some cases we follow the penetration of such substances into the water bodies of interests in a fashion that is similar to dye experiments, but on a much larger scale. In other cases, we use combinations of isotopes as ?radioactive clocks? (e.g., tritium, the radioactive isotope of hydrogen, and its decay product, the noble gas isotope 3He). In some cases, we deliberately inject small amounts of inert trace gases into specific water bodies (e.g., the Hudson River) and study their spreading and mixing. Such experiments provide the closest analogues to the spreading of contaminants in the environment.

In many cases, we combine our experimental work with modeling studies to understand the underlying physics of the circulation or to explore predictability. Modeling studies also provide insight into management options for certain water bodies.

Some of my projects include:


List of degrees from highest to lowest:

Lamont Projects:

Referenced in the Following News Items:

Selected Publications:

Decrease of river runoff in the upper waters of the Eurasian Basin, Arctic Ocean, between 1991 and 1996: Evidence from delta O-18 data Schlosser, P.; Newton, R.; Ekwurzel, B.; Khatiwala, S.; Mortlock, R.; Fairbanks, R. Geophysical Research Letters May 1 Volume: 29 Issue: 9 p.: - (2002) Doi 10.1029/2001gl013135
Determination of longitudinal dispersion coefficient and net advection in the tidal Hudson River with a large-scale, high resolution SF6 tracer release experiment Ho, D. T.; Schlosser, P.; Caplow, T. Environmental Science & Technology Aug 1 Volume: 36 Issue: 15 p.: 3234-3241 (2002) UNSP ES015814+
Excess helium and neon in the southeast Pacific: Tracers for glacial meltwater Hohmann, R.; Schlosser, P.; Jacobs, S.; Ludin, A.; Weppernig, R. Journal of Geophysical Research-Oceans Nov Volume: 107 Issue: C11 p.: - (2002) Doi 10.1029/2000jc000378