Zobrazeno 1 - 10
of 64
pro vyhledávání: '"Hugh D. Livingston"'
Autor:
Pavel P. Povinec, J.-F. Commanducci, Hugh D. Livingston, T. P. Ryan, Iolanda Osvath, S. Mulsow
Publikováno v:
Journal of Radioanalytical and Nuclear Chemistry. 263:437-440
A “sentinel”-type device, equipped with a NaI (Tl)-based underwater gamma-spectrometer mounted on a stationary buoy, transmitting data through satellite connection, was deployed in the north-western Irish Sea.The data recorded and received in rea
Autor:
Orihiko Togawa, Pavel P. Povinec, Toshimichi Ito, Ken O. Buesseler, Gi Hoon Hong, Hugh D. Livingston, Victor E. Noshkin, Roberta Delfanti, Asker Aarkrog, Hartmut Nies, Katsumi Hirose, Shigeki Shima
Publikováno v:
Journal of Environmental Radioactivity. 81:63-87
Under an IAEA's Co-ordinated Research Project "Worldwide Marine Radioactivity Studies (WOMARS)" 90Sr, 137Cs and (239,240)Pu concentration surface water time series in the Pacific and Indian Oceans have been investigated. The Pacific and Indian Oceans
Autor:
S. Mulsow, Toshimichi Ito, Hugh D. Livingston, Beniamino Oregioni, Yoshihiro Ikeuchi, Janine Gastaud, Hiroshi Moriya, Orihiko Togawa, Ingo Goroncy, Jerome La Rosa, Sang-Han Lee, Lang Huynh-Ngoc, Håkan Pettersson, Katsumi Hirose, Pavel P. Povinec, Michio Aoyama, Laval Liong Wee Kwong, Shigeki Shima
Publikováno v:
Deep Sea Research Part II: Topical Studies in Oceanography. 50:2607-2637
An international sampling cruise, the IAEA’97 NW Pacific Expedition, was carried out in 1997 with the primary objective of contributing to better understanding of the present distributions of radionuclides in the open ocean and of the processes aff
Autor:
Pavel P. Povinec, Hugh D. Livingston
Publikováno v:
Ocean & Coastal Management. 43:689-712
The present sources of anthropogenic radionuclides in the marine environment, consisting of global fallout, nuclear weapons testing, releases from nuclear facilities, radioactive waste dumping, the Chernobyl accident and nuclear submarine and aircraf
Publikováno v:
Journal of Geophysical Research: Oceans. 104:11099-11114
In this paper, we use the distribution of the artificial radionuclide, 137Cs, to investigate mixing and ventilation in the Black Sea. Timeseries data of vertical radionuclide distributions are combined with model simulations in order to follow the ma
Publikováno v:
Journal of Environmental Radioactivity. 43:187-203
Strontium-90 data are used to verify the mixing and ventilation patterns simulated in a circulation model of the Black Sea. We trace physical processes using 90Sr which was delivered after the Chernobyl accident, primarily via riverine discharges in
Publikováno v:
Deep Sea Research Part I: Oceanographic Research Papers. 45:1111-1125
Anthropogenic 129 I ( t 1/2 =15.7 My) discharged by the nuclear fuel reprocessing facilities at Sellafield (UK) and La Hague (France) is a promising tracer of physical and biogeochemical processes in the North Atlantic and Arctic Oceans. To improve u
Publikováno v:
Deep Sea Research Part II: Topical Studies in Oceanography. 42:1495-1517
Determination of the naturally occurring radionuclides 232 Th, 230 Th, 228 Th and 210 Pb, and the anthropogenic radionuclides 241 Am, 239,240 Pu, 134 Cs and 137 Cs in water samples collected across the Nansen Basin from the Barents Sea slope to the G
Publikováno v:
Deep Sea Research Part I: Oceanographic Research Papers. 40:1569-1595
Measurement of 234 Th and 228 Th in suspended and sinking particles made during the 1989 JGOFS North Atlantic Bloom Experiment permit estimation of the rates of particle cycling. Using a simple model of thorium-particle interactions applied to water
Publikováno v:
Deep Sea Research Part A. Oceanographic Research Papers. 39:1115-1137
The disequilibrium between the particle-reactive tracer 234 Th ( t 1 2 = 24.1 days) and its soluble parent, 238 U, was used to examine Th scavenging and export fluxes during the U.S. JGOFS North Atlantic Bloom Experiment (24 April–30 May 1989) at