Now showing items 21-30 of 957
Comment on “Modern-age buildup of CO2 and its effects on seawater acidity and salinity” by Hugo A. Loáiciga
(American Geophysical Union, 2007-09-25)
Export fluxes of calcite in the eastern equatorial Pacific from the Last Glacial Maximum to present
(American Geophysical Union, 2004-06-12)
The eastern equatorial Pacific (EEP) is an important center of biological productivity, generating significant organic carbon and calcite fluxes to the deep ocean. We reconstructed paleocalcite flux for the past 30,000 ...
Low reservoir ages for the surface ocean from mid-Holocene Florida corals
(American Geophysical Union, 2008-05-13)
The 14C reservoir age of the surface ocean was determined for two Holocene periods (4908–4955 and 3008–3066 calendar (cal) B.P.) using U/Th-dated corals from Biscayne National Park, Florida, United States. We found that ...
Submeter bathymetric mapping of volcanic and hydrothermal features on the East Pacific Rise crest at 9°50′N
(American Geophysical Union, 2007-01-19)
Recent advances in underwater vehicle navigation and sonar technology now permit detailed mapping of complex seafloor bathymetry found at mid-ocean ridge crests. Imagenex 881 (675 kHz) scanning sonar data collected during ...
Applications of fluorescence spectroscopy to environmental chemistry
(Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1992-02)
The work presented in this thesis consists of three parts. The first is a photophysical study of the mechanism of fluorescence quenching by stable nitroxyl radicals, which are becoming an important analytical tool for ...
Phosphate availability and the ultimate control of new nitrogen input by nitrogen fixation in the tropical Pacific Ocean
(Copernicus Publications on behalf of the European Geosciences Union, 2008-01-29)
Due to the low atmospheric input of phosphate into the open ocean, it is one of the key nutrients that could ultimately control primary production and carbon export into the deep ocean. The observed trend over the last 20 ...
Hydrogen isotope exchange between n-alkanes and water under hydrothermal conditions
To investigate the extent of hydrogen isotope (2H and 1H) exchange between hydrocarbons and water under hydrothermal conditions, we performed experiments heating C1–C5 n-alkanes in aqueous solutions of varying initial 2H/1H ...
Oceanography : plankton in a warmer world
Satellite data show that phytoplankton biomass and growth generally decline as the oceans’ surface waters warm up. Is this trend, seen over the past decade, a harbinger of the future for marine ecosystems?
Paleoreconstruction of organic carbon inputs to an oxbow lake in the Mississippi River watershed : effects of dam construction and land use change on regional inputs
(John Wiley & Sons, 2015-10-10)
We use a dated sediment core from Lake Whittington (USA) in the lower Mississippi River to reconstruct linkages in the carbon cycling and fluvial sediment dynamics over the past 80 years. Organic carbon (OC) sources were ...