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Interactions between nitrogen fixation and methane cycling in boreal peat bogs
(Georgia Institute of Technology, 2015-04-27)
Microbial nitrogen (N2) fixation supplies important nitrogen inputs to boreal peatlands, extremely oligotrophic ecosystems dominated by Sphagnum mosses. In this study, we coupled major and trace nutrient analyses and rate ...
Sensitivity analysis of surface wind field reconstructions in tropical cyclones
(Georgia Institute of Technology, 2014-07-02)
Accurate forecasts of tropical cyclone surface wind fields are essential for decisions involving evacuation preparation and damage potential. Towards addressing these actions, a comparison of the CFAN tropical cyclone ...
Reconciling diatom productivity and iron flux in the southern ocean
(Georgia Institute of Technology, 2015-04-24)
Iron plays an important role in the regulation of biological productivity and the carbon cycle of the Southern Ocean. Recently, synchrotron X-ray spectromicroscopy revealed that molar iron to silicon (Fe:Si) ratios in ...
The variability and seasonal cycle of the Southern Ocean carbon flux
(Georgia Institute of Technology, 2013-07-03)
Both physical circulation and biogeochemical characteristics are unique in the Southern Ocean (SO) region, and are fundamentally different from those of the northern hemisphere. Moreover, according to previous research, ...
Signatures of the El Nino-southern oscillation on rainfall and cave dripwater oxygen isotopes in N. Borneo
(Georgia Institute of Technology, 2019-12-11)
Oxygen isotope (δ18O) records of speleothem carbonates are a critical terrestrial paleoclimate archive, providing insight into past hydroclimate variations and past changes in atmospheric circulation. Specifically, time ...
Enhanced dissolved organic matter recovery from saltwater samples with coupled electrodialysis and solid phase extraction
(Georgia Institute of Technology, 2015-12-01)
Complexities associated with dissolved organic matter (DOM) isolation from seawater have hampered compositional characterization of this key component of global carbon and nutrient cycles. Two techniques, Electrodialysis ...
Prominent contribution of hydrogen peroxide to intracellular reactive oxygen species (ROS) generated upon exposure to naphthalene secondary organic aerosols (SOA)
(Georgia Institute of Technology, 2019-07-26)
Multiple studies have found an association between exposure to particulate matter (PM) and adverse health endpoints. One of the suggested mechanisms in which inhalable particles exert damage is by inducing the overproduction ...
Uncovering local magnetospheric processes governing the morphology and periodicity of Ganymede’s aurora using three-dimensional multifluid simulations of Ganymede’s magnetosphere
(Georgia Institute of Technology, 2013-04-08)
The electrodynamic interaction of Ganymede’s mini-magnetosphere with Jupiter’s corotating magnetospheric plasma has been shown to give rise to strong current systems closing through the moon and its ionosphere as well as ...
Timing of deglacial Atlantic meridional overturning variability from a high-resolution seawater cadmium reconstruction
(Georgia Institute of Technology, 2016-08-01)
A new, high-resolution record of benthic seawater Cd (Cdw) was generated from a Florida Straits-region sediment core. The record provides additional evidence for Cdw below modern values at this location during the Younger ...
Reanalysis of ammonia/ammonium partitioning and particle pH prediction from the Atlanta Aerosol Nucleation and Real-Time Characterization Experiment (ANARChE)
(Georgia Institute of Technology, 2018-04-27)
Atmospheric particle acidity, which is described by particle pH, has effects on aerosol formation, composition, and toxicity. It also has impacts on ecosystem and climate. During the past 15 years, NOx and SO2 emissions ...