Journal ArticleDOI
Removal of230Th and231Pa from the open ocean
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TLDR
In this article, the authors measured the concentration of dissolved 230Th and231Pa in sediment traps deployed in the Sargasso Sea (Site S2), the north equatorial Atlantic (site E), and the northern equatorial Pacific (Site P) as well as in particles collected by in situ filtration at Site E.About:
This article is published in Earth and Planetary Science Letters.The article was published on 1983-01-01. It has received 243 citations till now. The article focuses on the topics: Sediment trap & Particulates.read more
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Wind-Driven Upwelling in the Southern Ocean and the Deglacial Rise in Atmospheric CO2
Robert F. Anderson,Robert F. Anderson,Saleem H. Ali,Saleem H. Ali,Louisa I Bradtmiller,Louisa I Bradtmiller,Simon H.H. Nielsen,Martin Q. Fleisher,B. E. Anderson,Lloyd H. Burckle +9 more
TL;DR: In this article, the authors show that opal burial rates and thus upwelling were enhanced during the termination of the last ice age in each sector of the Southern Ocean, and they directly link increased ventilation of deep water to the deglacial rise in atmospheric CO2.
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Role of large particles in the transport of elements and organic compounds through the oceanic water column
Scott W. Fowler,George A. Knauer +1 more
TL;DR: The role of large detrital particles in the downward vertical mass flux in the sea has been investigated in a variety of sources, including sediment trap data as mentioned in this paper, and it has been shown that the relatively rare, large particles sinking through the water column are responsible for the majority of the downward mass flux.
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Rare earth elements in the Pacific and Atlantic Oceans
TL;DR: The first profiles of rare earth elements in the Pacific Ocean were reported in this paper, showing that the distribution of the rare earth groups is consistent with two simultaneous processes: 1) cycling similar to that of opal and calcium carbonate 2) adsorptive scavenging by settling particles and possibly by uptake at ocean boundaries.
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Particulate organic carbon fluxes to the ocean interior and factors controlling the biological pump: A synthesis of global sediment trap programs since 1983
TL;DR: In this article, the authors investigated the geographic contrasts of POC export at m/b and the supply rate of ∑CO2 to the world mesopelagic water column.
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Uranium and thorium isotopic and concentration measurements by magnetic sector inductively coupled plasma mass spectrometry
Chuan-Chou Shen,R. Lawrence Edwards,Hai Cheng,Jeffrey A. Dorale,R. B. Thomas,S. Bradley Moran,S. E. Weinstein,H. N. Edmonds +7 more
TL;DR: In this article, sector-field inductively coupled plasma mass spectrometry (ICP-MS) was used to measure the isotopic composition and concentration of uranium and thorium, focusing on the rare isotopes, 230Th and 234U.
References
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The supply and accumulation of silica in the marine environment
TL;DR: For example, the accumulation of biogenic silica in estuarine deposits removes a maximum of 8 × 1014g SiO2/yr or 10% of the dissolved silica input to the oceans as mentioned in this paper.
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Long-Range Atmospheric Transport of Soil Dust from Asia to the Tropical North Pacific: Temporal Variability
TL;DR: The concentration of airborne soil dust at Enewetak Atoll in April 1979 was 2.3 micrograms per cubic meter but decreased steadily to 0.02 microgramper cubic meter over the next 5 months, suggesting that the spring dust is probably derived from China.
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Distribution of thorium isotopes between dissolved and particulate forms in the deep sea
TL;DR: The distribution of 234Th, 230Th, and 228Th between dissolved and particulate forms was determined in 17 seawater samples from the Guatemala and Panama basins as discussed by the authors, where the seawater first passed through a Nuclepore filter (1.0-μm pore size) and then through a cartridge packed with Nitex netting that was impregnated with MnO2 to scavenge the dissolved Th isotopes.
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Uranium in open ocean: concentration and isotopic composition☆
TL;DR: Uranium concentrations and 234U/238U activity ratios have been determined in 63 seawater samples (nine vertical profiles) from the Atlantic, the Pacific, the Arctic, and the Antarctic oceans, using the alpha-spectrometric method for their determinations as discussed by the authors.
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Shaping of the continental rise by deep geostrophic contour currents.
TL;DR: Geostrophic contour-following bottom currents involved in the deep thermohaline circulation of the world ocean appear to be the principal agents which control the shape of the continental rise and other sediment bodies.