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Showing 1 to 5 of 5 for “"Thorium-234"”.

  1. Monthly variability in upper ocean biogeochemistry due to mesoscale eddy activity in the Saragasso Sea

    Sweeney, Erin N.Massachusetts Institute of Technology and Woods Hole Oceanographic Institution2001

    … Sea. Measurements of primary production, thorium-234 flux, nitrate+nitrite, and photosynthetic pigments made at the US JGOFS Bermuda Atlantic Time-series Study (BATS) site were used. During the three years of this study, four out of six high thorium- 234 flux events over 1000 dpm/m2/d …

    woods-hole Repository record

  2. Monthly variability in upper ocean biogeochemistry due to mesoscale eddy activity in the Saragasso Sea

    Sweeney, Erin N. (Erin Nicole), 1971-Massachusetts Institute of Technology2001

    … Sea. Measurements of primary production, thorium-234 flux, nitrate+nitrite, and photosynthetic pigments made at the US JGOFS Bermuda Atlantic Time-series Study (BATS) site were used. During the three years of this study, four out of six high thorium- 234 flux events over 1000 dpm/m 2/d …

    mit Repository record

  3. Particle export and flux through the Mesopelagic in the high-latitude north and South Atlantic

    Martin, PatrickUniversity of Southampton2011

    … was tracked using Lagrangian sediment traps and thorium-234 disequilibria. A large pulse of diatom detritus was exported suddenly at the end of the bloom, probably upon impending Si-limitation. The particles were rich in transparent exopolymer particles (TEP, sticky polysaccharides secreted by …

    soton Repository record

  4. Phosphorous cycling in the Gulf of Maine : a multi-tracer approach

    Benitez-Nelson, Claudia R.Massachusetts Institute of Technology and Woods Hole Oceanographic Institution1998

    … (t_= 14.3 d), phosphorus-33 (t_ = 25.3 d), thorium-234 (t_ = 24.1) and beryllium-7 (t_ = 53.3 d). New techniques were developed for the extraction, purification and measurement of 32p and 33p in rainwater and in inorganic, organic and particulate pools in seawater. In order to constrain the …

    woods-hole Repository record

  5. Investigating the ocean’s biological pump using thorium-235 and polonium-210

    Clevenger, Samantha J.Massachusetts Institute of Technology and Woods Hole Oceanographic Institution2024

    … In this thesis, the two radioisotope pairs 234Th/238U and 210Po/210Pb are utilized. Chapter 2 is an update of the 234Th/238U measurement method which simplifies the protocol, and allows for expansion of use. Chapter 3 presents an unprecedentedly extensive, non-steady state study of …

    woods-hole Repository record