Paleoclimate records from glacial Indian and Pacific oceans sediments document millennial-scale fluctuations of subsurface dissolved oxygen levels and denitrification coherent with North Atlantic temperature oscillations. Yet the mechanism of this teleconnection between the remote ocean basins remains elusive. Here we present model simulations of the oxygen and nitrogen cycles that...
Paleoclimate records from glacial Indian and Pacific oceans sediments document millennial-scale fluctuations of subsurface dissolved oxygen levels and denitrification coherent with North Atlantic temperature oscillations. Yet the mechanism of this teleconnection between the remote ocean basins remains elusive. Here we present model simulations of the oxygen and nitrogen cycles that...
Iron is considered to play a large role in the cycling of Si in Fe-limited regions of the ocean, but little is known about its role in Si biogeochemistry outside these areas. Here, we present published sediment trap data, new nutrient profiles and high resolution sedimentary records (Si isotopes, Biogenic...
Thomas and Megahan [1998] provide a thoughtful reanalysis of our earlier paper [Jones and Grant, 1996]. Thomas and Megahan [1998] (hereinafter referred to as T&M) reacted to three assertions made by Jones and Grant [1996] (hereinafter referred to as J&G): (1) "forest harvesting has increased peak discharges by as much...
This study shows how patronage framed and fashioned the careers of Thomas Hobbes and
his patron William Cavendish, the earl of Newcastle. Newcastle's protection allowed
Hobbes to articulate heterodox ideas without immediate fear of reprisal. It also enabled
him to solidify his status as a gentleman and the intellectual equal...
A NE–SW-trending graben at Kap Dalton on the Blosseville Kyst contains an at least 600 m thick
succession of Eocene basalt lavas and sediments. The succession has been investigated by new field
work, geochemical analysis and radiometric dating by the ⁴⁰Ar-³⁹Ar incremental heating method.
The results show that the volcanic...
Isotopic analyses of dissolved molybdenum are presented for sediment pore waters from a reducing
sedimentary basin and for fluids from a low-temperature ridge flank hydrothermal system. δ⁹⁸/⁹⁵Mo in
these fluids range from 0.8 to 3.5%₀ (relative to a laboratory standard), demonstrating that marine
sedimentary reactions significantly fractionate Mo isotopes. Within...
Background: Multinucleon transfer reactions have recently attracted attention as a possible path to the synthesis of new neutron-rich heavy nuclei.
Purpose: We study transfer reactions involving massive nuclei with the intention of understanding if the semi-classical model GRAZING coupled to an evaporation and fission competition model can satisfactorily reproduce experimental...
Environmental DNA sequencing has revealed the expansive biodiversity of microorganisms
and clarified the relationship between host-associated microbial communities and host
phenotype. Shotgun metagenomic DNA sequencing is a relatively new and powerful
environmental sequencing approach that provides insight into community biodiversity and
function. But, the analysis of metagenomic sequences is complicated...
The effect of the Coriolis interaction upon the sharing of energy between rotational and vibrational excitation
during an electronic transition is considered with particular emphasis on recoil-induced excitation during
photoionization. If there is a large change in equilibrium bond length upon ionization, then Coriolis coupling
leads to a significant transfer...