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The biogeochemical source and role of soluble organic-Fe(III) complexes in continental margin sediments
(Georgia Institute of Technology, 2014-09-10)
In the past couple of decades, the discovery that iron is a limiting nutrient in large regions of the ocean has spurred much research into characterizing the biogeochemical controls on iron cycling. While Fe(II) is soluble ...
Detecting deep tectonic tremor in Taiwan using dense arrays
(Georgia Institute of Technology, 2014-08-06)
Deep tectonic tremor has been observed in major subduction zones, strike-slip faults, inland faulting systems, and arc-continent collision environments around the Pacific Rim. However, detailed space-time evolution of its ...
Biodegradation of Macondo oil by aerobic hydrocarbon-degrading bacteria in the water column and deepsea sediments of the northern Gulf of Mexico
(Georgia Institute of Technology, 2014-11-25)
Previous studies have come to contrasting conclusions regarding nutrient limitation of hydrocarbon biodegradation in the Gulf of Mexico, and rate measurements are needed to support oil plume modeling. Thus, this study ...
A satellite and ash transport model aided approach to assess the radiative impacts of volcanic aerosol in the Arctic
(Georgia Institute of Technology, 2014-01-10)
The Arctic radiation climate is influenced substantially by anthropogenic and natural aerosols. There have been numerous studies devoted to understanding the radiative impacts of anthropogenic aerosols (e.g. those responsible ...
The patterns of polar near-surface ozone associated with various atmospheric conditions
(Georgia Institute of Technology, 2014-03-24)
Understanding the spatiotemporal pattern of near-surface ozone is the key part of polar atmospheric environment. The near-surface ozone can be depleted by the catalytic bromine chemistry in the heterogeneous phase but ...
Analog and numerical experiments investigating force chain influences on the bed physics of dense granular flows
(Georgia Institute of Technology, 2014-03-31)
Granular materials are composed of solid, discrete particles and exhibit mechanical properties that range from fluid to solid behavior. Some of the complexity exhibited by granular systems arises due to the long-range order ...
Examination of mineral dust variability and linkages to climate and land-cover/land-use change over Asian drylands
(Georgia Institute of Technology, 2014-03-31)
Large uncertainties remain in estimating the anthropogenic fraction of mineral dust and the climatic impact of dust aerosol, partly due to a poor understanding of the dust source dynamics under the influence of climate ...
Changing seasonality of convective events in the Labrador Sea
(Georgia Institute of Technology, 2014-04-09)
The representation of deep convection in ocean models is a fundamental challenge for climate science. Here a regional simulation of the Labrador Sea circulation and convective activity obtained with the Regional Oceanic ...
Improved inverse modeling of nitrogen oxides emissions using satellite measurements over China and evidence of volatile organics emissions over the tropical Pacific
(Georgia Institute of Technology, 2014-03-31)
We improved the assimilated daily inversion method by conducting model simulation, satellite retrieval, and inverse modeling sequentially on a daily basis. The improved procedure was applied to GOME-2 and OMI NO₂ measurements ...
Geochemistry of karst deposits in Borneo detailing hydroclimate variations in the Warm Pool across the late Pleistocene
(Georgia Institute of Technology, 2014-06-24)
Variability in the tropical ocean-atmospheric system causes global scale climate anomalies, most evident in the El Niño-Southern Oscillation’s coupled climate
feedbacks. Despite being an area of high interest, many ...