Tyler B. Coplen, Ph.D.
Dr. Tyler Coplen is the Director of the Reston Stable Isotope Laboratory of the USGS Water Resources Mission Area.
Tyler B. Coplen is an ST scientist in geochemistry. His research focuses on isotope hydrology, development of innovative analytical techniques for isotopic analysis of light elements, provides forensic-quality analytical services to USGS programs, and creates isotopic reference materials for calibration of mass spectrometers and laser absorption spectrometers in isotope laboratories worldwide. In 1974, he joined the U.S. Geological Survey, and in 1978, he set up the Reston Stable Isotope Laboratory, please visit the Reston Stable Isotope Laboratory website. He set up and led the Subcommittee on Natural Isotopic Fractionation (1985–2002) of the International Union of Pure and Applied Chemistry (IUPAC) that resulted in a dozen elements being assigned standard atomic-weight values that are intervals, instead of single values, to indicate that atomic-weight values of many elements are not constants of nature.
Professional Experience
Assistant Research Geochemist, University of California, Riverside 1970–1974
Education and Certifications
Ph.D. 1970, University of Chicago, Department of Geophysical Sciences, Advisor: Prof. Robert N. Clayton
M.S. 1968, University of Chicago, Department of Geophysical Sciences
B.S. 1966, Pacific Lutheran University, Major: Physics
Affiliations and Memberships*
Honorary Member, Commission on Isotopic Abundances and Atomic Weights of the International Union of Pure and Applied Chemistry
Science and Products
Filter Total Items: 18
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The relative contributions of summer and cool-season precipitation to groundwater recharge, Spring Mountains, Nevada, USA The relative contributions of summer and cool-season precipitation to groundwater recharge, Spring Mountains, Nevada, USA
A comparison of the stable-isotope signatures of spring waters, snow, snowmelt, summer (July thru September) rain, and cool season (October thru June) rain indicates that the high-intensity, short-duration summer convective storms, which contribute approximately a third of the annual precipitation to the Spring Mountains, provide only a small fraction (perhaps 10%) of the recharge to...
Authors
I.J. Winograd, A.C. Riggs, T.B. Coplen
A manual for a Laboratory Information Management System (LIMS) for light stable isotopes A manual for a Laboratory Information Management System (LIMS) for light stable isotopes
The reliability and accuracy of isotopic data can be improved by utilizing database software to (i) store information about samples, (ii) store the results of mass spectrometric isotope-ratio analyses of samples, (iii) calculate analytical results using standardized algorithms stored in a database, (iv) normalize stable isotopic data to international scales using isotopic reference...
Authors
Tyler B. Coplen
Unnatural isotopic composition of lithium reagents Unnatural isotopic composition of lithium reagents
Isotopic analysis of 39 lithium reagents from several manufacturers indicates that seven were artificially depleted in 6Li significantly in excess of the variation found in terrestrial materials. The atomic weight of lithium in analyzed reagents ranged from 6.939 to 6.996, and δ7Li, reported relative to L-SVEC lithium carbonate, ranged from −11 to +3013‰. This investigation indicates...
Authors
H. P. Qi, Tyler B. Coplen, Q. Zh Wang, Y. #NAME? Wang
Use of chemical and isotopic tracers to characterize the interactions between ground water and surface water in mantled karst Use of chemical and isotopic tracers to characterize the interactions between ground water and surface water in mantled karst
In the mantled karst terrane of northern Florida, the water quality of the Upper Floridan aquifer is influenced by the degree of connectivity between the aquifer and the surface. Chemical and isotopic analyses [18O/16O (δ18O), 2H/1H (δD), 13C/12C (δ13C), tritium (3H), and strontium‐87/strontium‐86 (87Sr/86Sr)] along with geochemical mass‐balance modeling were used to identify the...
Authors
B. G. Katz, T.B. Coplen, T.D. Bullen, J. Hal Davis
Data from Devils Hole Core DH-11 Data from Devils Hole Core DH-11
This report presents the stable isotope values measured in Devils Hole Core DH-11 and interpolated ages at the depth the samples were taken, as analyzed in a recent publication by Winograd and others (1997).
Authors
Jurate Maciunas Landwehr, T.B. Coplen, K.R. Ludwig, I.J. Winograd, A.C. Riggs
Duration and structure of the past four interglaciations Duration and structure of the past four interglaciations
Reanalysis and additional dating of the Devils Hole ??18O paleotemperature record confirm that the last interglaciation in the Great Basin (the continental analog of marine isotopic substage 5e) lasted ???22,000 yr, consistent with the Vostok paleotemperature record which suggests a duration of ???19,000 yr for this event in Antarctica. The three preceding interglaciations in the Devils...
Authors
I.J. Winograd, J.M. Landwehr, K.R. Ludwig, T.B. Coplen, A.C. Riggs
Science and Products
Filter Total Items: 18
No Result Found
Filter Total Items: 153
The relative contributions of summer and cool-season precipitation to groundwater recharge, Spring Mountains, Nevada, USA The relative contributions of summer and cool-season precipitation to groundwater recharge, Spring Mountains, Nevada, USA
A comparison of the stable-isotope signatures of spring waters, snow, snowmelt, summer (July thru September) rain, and cool season (October thru June) rain indicates that the high-intensity, short-duration summer convective storms, which contribute approximately a third of the annual precipitation to the Spring Mountains, provide only a small fraction (perhaps 10%) of the recharge to...
Authors
I.J. Winograd, A.C. Riggs, T.B. Coplen
A manual for a Laboratory Information Management System (LIMS) for light stable isotopes A manual for a Laboratory Information Management System (LIMS) for light stable isotopes
The reliability and accuracy of isotopic data can be improved by utilizing database software to (i) store information about samples, (ii) store the results of mass spectrometric isotope-ratio analyses of samples, (iii) calculate analytical results using standardized algorithms stored in a database, (iv) normalize stable isotopic data to international scales using isotopic reference...
Authors
Tyler B. Coplen
Unnatural isotopic composition of lithium reagents Unnatural isotopic composition of lithium reagents
Isotopic analysis of 39 lithium reagents from several manufacturers indicates that seven were artificially depleted in 6Li significantly in excess of the variation found in terrestrial materials. The atomic weight of lithium in analyzed reagents ranged from 6.939 to 6.996, and δ7Li, reported relative to L-SVEC lithium carbonate, ranged from −11 to +3013‰. This investigation indicates...
Authors
H. P. Qi, Tyler B. Coplen, Q. Zh Wang, Y. #NAME? Wang
Use of chemical and isotopic tracers to characterize the interactions between ground water and surface water in mantled karst Use of chemical and isotopic tracers to characterize the interactions between ground water and surface water in mantled karst
In the mantled karst terrane of northern Florida, the water quality of the Upper Floridan aquifer is influenced by the degree of connectivity between the aquifer and the surface. Chemical and isotopic analyses [18O/16O (δ18O), 2H/1H (δD), 13C/12C (δ13C), tritium (3H), and strontium‐87/strontium‐86 (87Sr/86Sr)] along with geochemical mass‐balance modeling were used to identify the...
Authors
B. G. Katz, T.B. Coplen, T.D. Bullen, J. Hal Davis
Data from Devils Hole Core DH-11 Data from Devils Hole Core DH-11
This report presents the stable isotope values measured in Devils Hole Core DH-11 and interpolated ages at the depth the samples were taken, as analyzed in a recent publication by Winograd and others (1997).
Authors
Jurate Maciunas Landwehr, T.B. Coplen, K.R. Ludwig, I.J. Winograd, A.C. Riggs
Duration and structure of the past four interglaciations Duration and structure of the past four interglaciations
Reanalysis and additional dating of the Devils Hole ??18O paleotemperature record confirm that the last interglaciation in the Great Basin (the continental analog of marine isotopic substage 5e) lasted ???22,000 yr, consistent with the Vostok paleotemperature record which suggests a duration of ???19,000 yr for this event in Antarctica. The three preceding interglaciations in the Devils...
Authors
I.J. Winograd, J.M. Landwehr, K.R. Ludwig, T.B. Coplen, A.C. Riggs
*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government