Now showing items 21-30 of 1000
NotCal04; comparison/ calibration 14C records 26-50 cal kyr BP
(Dept. of Geosciences, University of Arizona, 2004)
The radiocarbon calibration curve IntCal04 extends back to 26 cal kyr BP. While several high-resolution records exist beyond this limit, these data sets exhibit discrepancies of up to several millennia. As a result, no ...
Heterogeneous reservoirs in the marine carbon cycle
(Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2014-06)
Understanding the fate of primary production in the ocean is a challenging task because once produced, organic material is oxidized over timescales which range from minutes, to millions of years. This timescale diversity ...
Moist synoptic transport of CO2 along the mid-latitude storm track
(American Geophysical Union, 2011-05-12)
Atmospheric mixing ratios of CO2 are strongly seasonal in the Arctic due to mid-latitude transport. Here we analyze the seasonal influence of moist synoptic storms by diagnosing CO2 transport from a global model on moist ...
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?
Investigations of air-sea gas exchange in the CoOP Coastal Air-Sea Chemical Exchange project
(Oceanography Society, 2008-12)
The exchange of CO2 and other gases across the ocean-air interface is an extremely important component in global climate dynamics, photosynthesis and respiration, and the absorption of anthropogenically produced CO2. The ...
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 ...
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 ...
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 ...
Evidence for significant photochemical production of carbon monoxide by particles in coastal and oligotrophic marine waters
(American Geophysical Union, 2009-12-09)
Carbon monoxide (CO) photoproduction from particulate and chromophoric dissolved organic matter (CDOM) was determined in seawater from open-ocean and coastal areas. In confirmatory tests, poisoned or non-poisoned filtered ...