Todd K Hinkley
Todd Hinkley is a Scientist Emeritus with the Geology, Geophysics, and Geochemistry Science Center.
Science and Products
Filter Total Items: 27
Comment on "Next-Generation Ice Core Technology Reveals True Minimum Natural Levels of lead (Pb) in the atmosphere: Insights from the Black Death" by More et al. Comment on "Next-Generation Ice Core Technology Reveals True Minimum Natural Levels of lead (Pb) in the atmosphere: Insights from the Black Death" by More et al.
Results and interpretation of the subject article are surprising and conflict with expectations about atmospheric deposition of lead (Pb)Before interpretation of subject article is accepted a body of information about natural deposition of lead (Pb) must be consideredThis body of information includes knowledge of volcano emissions, chemistry of natural dusts, and isotopes of lead (Pb)
Authors
Todd K. Hinkley
Investigation of thallium fluxes from subaerial volcanism-Implications for the present and past mass balance of thallium in the oceans Investigation of thallium fluxes from subaerial volcanism-Implications for the present and past mass balance of thallium in the oceans
A suite of 34 volcanic gas condensates and particulates from Kilauea (Hawaii), Mt. Etna and Vulcano (Italy), Mt. Merapi (Indonesia), White Island and Mt. Nguaruhoe (New Zealand) were analysed for both Tl isotope compositions and Tl/Pb ratios. When considered together with published Tl–Pb abundance data, the measurements provide globally representative best estimates of Tl/Pb = 0.46 ± 0...
Authors
R.G.A. Baker, M. Rehkamper, T. K. Hinkley, S.G. Nielsen, J.P. Toutain
Mid-Holocene change in types of degassing volcanoes, using indium in Antarctic ice as a tracer of volcanic source type Mid-Holocene change in types of degassing volcanoes, using indium in Antarctic ice as a tracer of volcanic source type
Proportions of trace metals in Antarctic ice samples indicate that the type of volcanoes that dominated atmospheric emissions changed at about the middle of the Holocene from relatively mafic, deep source volcanoes to more silicic, shallower-source volcanoes. We base this inference on the strong contrast in the abundances of the trace metal indium (In), relative to other trace metals...
Authors
T. Hinkley, A. Matsumoto
Lead (Pb) in old Antarctic ice: Some from dust, some from other sources Lead (Pb) in old Antarctic ice: Some from dust, some from other sources
Recently published data on amounts and isotopic compositions of lead (Pb) and on amounts of mineral dust in pre-industrial Antarctic ice can be further interpreted by means of simple calculations. These show that two distinct types of Pb were provided by the atmosphere to the continent in varying proportions during Pleistocene and Holocene time. One type of Pb is that contained in the...
Authors
T. Hinkley
Trace metal concentrations in snow from the Yukon River Basin, Alaska and Canada Trace metal concentrations in snow from the Yukon River Basin, Alaska and Canada
We report here on metal concentrations in snow collected from the Yukon River basin. Atmospheric transport of metals and subsequent deposition is a known mechanism for introducing metals into the northern environment. Potential sources of airborne elements are locally generated terrestrial sources, locally derived anthropogenic sources, and long range atmospheric transport. Sites were...
Authors
B. Wang, L. Gough, T. Hinkley, J. Garbarino, P. Lamothe
Dust emission and deposition in the southwestern United States - Integrated field, remote sensing, and modeling studies to evaluate response to climatic variability and land use Dust emission and deposition in the southwestern United States - Integrated field, remote sensing, and modeling studies to evaluate response to climatic variability and land use
No abstract available.
Authors
Richard L. Reynolds, Marith C. Reheis, Todd K. Hinkley, Richard Tigges, G. Clow, Paul J. Lamothe, J. Yount, P. Chavez, D. Mackinnon, M. Velasco, S. Sides, D. Soltesz, N. Lancaster, M. Miller, R. Fulton, Jayne Belnap
Science and Products
Filter Total Items: 27
Comment on "Next-Generation Ice Core Technology Reveals True Minimum Natural Levels of lead (Pb) in the atmosphere: Insights from the Black Death" by More et al. Comment on "Next-Generation Ice Core Technology Reveals True Minimum Natural Levels of lead (Pb) in the atmosphere: Insights from the Black Death" by More et al.
Results and interpretation of the subject article are surprising and conflict with expectations about atmospheric deposition of lead (Pb)Before interpretation of subject article is accepted a body of information about natural deposition of lead (Pb) must be consideredThis body of information includes knowledge of volcano emissions, chemistry of natural dusts, and isotopes of lead (Pb)
Authors
Todd K. Hinkley
Investigation of thallium fluxes from subaerial volcanism-Implications for the present and past mass balance of thallium in the oceans Investigation of thallium fluxes from subaerial volcanism-Implications for the present and past mass balance of thallium in the oceans
A suite of 34 volcanic gas condensates and particulates from Kilauea (Hawaii), Mt. Etna and Vulcano (Italy), Mt. Merapi (Indonesia), White Island and Mt. Nguaruhoe (New Zealand) were analysed for both Tl isotope compositions and Tl/Pb ratios. When considered together with published Tl–Pb abundance data, the measurements provide globally representative best estimates of Tl/Pb = 0.46 ± 0...
Authors
R.G.A. Baker, M. Rehkamper, T. K. Hinkley, S.G. Nielsen, J.P. Toutain
Mid-Holocene change in types of degassing volcanoes, using indium in Antarctic ice as a tracer of volcanic source type Mid-Holocene change in types of degassing volcanoes, using indium in Antarctic ice as a tracer of volcanic source type
Proportions of trace metals in Antarctic ice samples indicate that the type of volcanoes that dominated atmospheric emissions changed at about the middle of the Holocene from relatively mafic, deep source volcanoes to more silicic, shallower-source volcanoes. We base this inference on the strong contrast in the abundances of the trace metal indium (In), relative to other trace metals...
Authors
T. Hinkley, A. Matsumoto
Lead (Pb) in old Antarctic ice: Some from dust, some from other sources Lead (Pb) in old Antarctic ice: Some from dust, some from other sources
Recently published data on amounts and isotopic compositions of lead (Pb) and on amounts of mineral dust in pre-industrial Antarctic ice can be further interpreted by means of simple calculations. These show that two distinct types of Pb were provided by the atmosphere to the continent in varying proportions during Pleistocene and Holocene time. One type of Pb is that contained in the...
Authors
T. Hinkley
Trace metal concentrations in snow from the Yukon River Basin, Alaska and Canada Trace metal concentrations in snow from the Yukon River Basin, Alaska and Canada
We report here on metal concentrations in snow collected from the Yukon River basin. Atmospheric transport of metals and subsequent deposition is a known mechanism for introducing metals into the northern environment. Potential sources of airborne elements are locally generated terrestrial sources, locally derived anthropogenic sources, and long range atmospheric transport. Sites were...
Authors
B. Wang, L. Gough, T. Hinkley, J. Garbarino, P. Lamothe
Dust emission and deposition in the southwestern United States - Integrated field, remote sensing, and modeling studies to evaluate response to climatic variability and land use Dust emission and deposition in the southwestern United States - Integrated field, remote sensing, and modeling studies to evaluate response to climatic variability and land use
No abstract available.
Authors
Richard L. Reynolds, Marith C. Reheis, Todd K. Hinkley, Richard Tigges, G. Clow, Paul J. Lamothe, J. Yount, P. Chavez, D. Mackinnon, M. Velasco, S. Sides, D. Soltesz, N. Lancaster, M. Miller, R. Fulton, Jayne Belnap