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Articles 1 - 7 of 7
Full-Text Articles in Physical Sciences and Mathematics
"Stratigraphic Analysis Of Upper Cretaceous Rocks In The Mahajanga Basin, Northwestern Madagascar: Implications For Ancient And Modern Faunas: Reply.", Raymond Rogers, J.H. Hartman, D.W. Krause
"Stratigraphic Analysis Of Upper Cretaceous Rocks In The Mahajanga Basin, Northwestern Madagascar: Implications For Ancient And Modern Faunas: Reply.", Raymond Rogers, J.H. Hartman, D.W. Krause
Raymond Rogers
No abstract provided.
Ozone And Tracer Transport Variations In The Summer Northern Hemisphere Stratosphere, E. C. Cordero, S. R. Kawa
Ozone And Tracer Transport Variations In The Summer Northern Hemisphere Stratosphere, E. C. Cordero, S. R. Kawa
Eugene C. Cordero
Constituent observations from the Upper Atmosphere Research Satellite (UARS) in combination with estimates of the residual circulation are used to examine the transport and chemical budgets of HF, CH4 and O3 in the summer Northern Hemisphere. Budget calculations of HF, CH4 and O3 show that the transport tendency due to the residual circulation increases in magnitude and is largely opposed by eddy motions through the summer months. Ozone budget analyses show that between 100 and 31 hPa, the magnitudes of the mean circulation and eddy transport terms increase through the summer months, producing tendencies that are …
Solute Transport Through Laboratory-Scale Karstic Aquifers, Lee J. Florea, Carol M. Wicks
Solute Transport Through Laboratory-Scale Karstic Aquifers, Lee J. Florea, Carol M. Wicks
Lee J Florea, PhD, P.G.
Laboratory-scale models of branchwork and of network karstic aquifers were constructed to provide data needed for calibration of numerical models. The distribution and connectedness of the conduits and sinkholes were scaled similarly to those found in nature; however, the porosity of models (2 and 3%) and the recharge rate (80 cm/hr) could not be scaled appropriately. Pulses of 1-M NaCl were injected sequentially at ten locations on both models to determine transport parameters using QTRACER. For all experiments, the Reynolds numbers were <150, the Peclet numbers were >6, and the Froude numbers were ~0. The flow regime was laminar and subcritical and advective processes dominated …
Federal Fossil Fuel Subsidies And Greenhouse Gas Emissions: A Case Study Of Increasing Transparency For Fiscal Policy, John Dernbach, Doug Koplow
Federal Fossil Fuel Subsidies And Greenhouse Gas Emissions: A Case Study Of Increasing Transparency For Fiscal Policy, John Dernbach, Doug Koplow
John C. Dernbach
No abstract provided.
From Rio To Johannesburg: Implementing Sustainable Development At The Global And Local Scale, John Dernbach
From Rio To Johannesburg: Implementing Sustainable Development At The Global And Local Scale, John Dernbach
John C. Dernbach
No abstract provided.
Lead Isotope Tracking Of Atmospheric Response To Post- Industrial Conditions In Yerevan, Armenia, Charles Dunlap, Robert Kurkjian
Lead Isotope Tracking Of Atmospheric Response To Post- Industrial Conditions In Yerevan, Armenia, Charles Dunlap, Robert Kurkjian
Charles Dunlap
Temporal gradients in environmental lead concentrations and isotopic compositions trace the rapidly shifting transition from high to low industrial emissions in Yerevan, Armenia following the dissolution of the Soviet Union in the early 1990s. Shortly after the breakup, in 1995 and 1996, atmospheric lead concentrations averaged ~0.4 µg/m3 and the combustion of leaded gasoline was the primary source of industrial lead emissions in Yerevan. But by 1998, unleaded gasoline was predominant and atmospheric lead concentrations had decreased by two orders of magnitude to ≤ 0.003 µg/m3 because industrial lead emissions from stationary sources had also been radically curtailed. The increased …
Karst Genetic Model For The French Bay Breccia Deposits, San Salvador, Bahamas, Lee J. Florea, John Mylroie, Jim Carew
Karst Genetic Model For The French Bay Breccia Deposits, San Salvador, Bahamas, Lee J. Florea, John Mylroie, Jim Carew
Lee J Florea, PhD, P.G.
No abstract provided.