63 research outputs found
Evaluation of a proposal for reliable low-cost grid power with 100% wind, water, and solar
A number of analyses, meta-Analyses, and assessments, including those performed by the Intergovernmental Panel on Climate Change, the National Oceanic and Atmospheric Administration, the National Renewable Energy Laboratory, and the International Energy Agency, have concluded that deployment of a diverse portfolio of clean energy technologies makes a transition to a low-carbon-emission energy system both more feasible and less costly than other pathways. In contrast, Jacobson et al. [Jacobson MZ, Delucchi MA, Cameron MA, Frew BA (2015) Proc Natl Acad Sci USA 112(49):15060-15065] argue that it is feasible to provide low-cost solutions to the grid reliability problem with 100% penetration of WWS [wind, water and solar power] across all energy sectors in the continental United States between 2050 and 2055 , with only electricity and hydrogen as energy carriers. In this paper, we evaluate that study and find significant shortcomings in the analysis. In particular, we point out that this work used invalid modeling tools, contained modeling errors, and made implausible and inadequately supported assumptions. Policy makers should treat with caution any visions of a rapid, reliable, and low-cost transition to entire energy systems that relies almost exclusively on wind, solar, and hydroelectric power
The dementia-associated APOE Δ4 allele is not associated with rapid eye movement sleep behavior disorder
Qualidade microbiológica de filés de tilåpia do Nilo (Oreochromis niloticus) durante o armazenamento em gelo
Staphylococcus aureus enterotoxigĂȘnico no vestĂbulo nasal de manipuladores de alimentos em cozinhas de hospitais do municĂpio de JoĂŁo Pessoa, PB, Brasil
An observational and modeling study of the processes leading to deep, moist convection in complex terrain
A case study of orographic convection initiation (CI) that occurred along the eastern slopes of the Vosges
Mountains in France on 6 August 2007 during the Convective and Orographically-Induced Precipitation
Study (COPS) is presented. Global positioning system (GPS) receivers and two Doppler on Wheels (DOW)
mobile radars sampled the preconvective and storm environments and were respectively used to retrieve
three-dimensional tomographic water vapor and wind fields. These retrieved data were supplemented with
temperature, moisture, and winds from radiosondes from a site in the eastern Rhine Valley. High-resolution
numerical simulations with the Weather Research and Forecasting (WRF) Model were used to further investigate
the physical processes leading to convective precipitation.
This unique, time-varying combination of derived water vapor and winds from observations illustrated an
increase in low-level moisture and convergence between upslope easterlies and downslope westerlies along
the eastern slope of the Vosges Mountains. Uplift associated with these shallow, colliding boundary layer
flows eventually led to the initiation of moist convection. WRF reproduced many features of the observed
complicated flow, such as cyclonic (anticyclonic) flow around the southern (northern) end of the Vosges
Mountains and the east-side convergent flow below the ridgeline. The WRF simulations also illustrated
spatial and temporal variability in buoyancy and the removal of the lids prior to convective development. The
timing and location of CI from the WRF simulations was surprisingly close to that observed
P.542 Epigenetic regulation in the dorsal hippocampus of rats exposed to methylazoxymethanol acetate; a model of schizophrenia
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