Integrating Multimedia Models To Assess Nitrogen Losses From The Mississippi River Basin To The Gulf Of Mexico, Ruoyu Wang
Nov 2018
Integrating Multimedia Models To Assess Nitrogen Losses From The Mississippi River Basin To The Gulf Of Mexico, Ruoyu Wang
Ruoyu Wang
This study describes and implements an integrated, multimedia, process-based system-level approach to estimating nitrogen (N) fate and transport in large river basins. The modeling system includes the following components: (1) Community Multiscale Air Quality (CMAQ), (2) Weather Research and Forecasting Model (WRF), (3) Environmental Policy Integrated Climate (EPIC), and (4) Soil and Water Assessment Tool (SWAT). The previously developed Fertilizer Emission Scenario Tool for CMAQ (FEST-C), an advanced user interface, integrated EPIC with the WRF model and CMAQ. The FEST-C system, driven by process-based WRF weather simulations, includes atmospheric N additions to agricultural cropland and agricultural cropland contributions to ammonia emissions. This study focuses …
Reconsidering Downwind Operation By Analysis Of The Nrel Phase Vi Data, Scott Larwood, Raymond Chow
Jun 2018
Reconsidering Downwind Operation By Analysis Of The Nrel Phase Vi Data, Scott Larwood, Raymond Chow
Scott M. Larwood
Data are presented comparing upwind versus downwind operation of the National Renewable Energy Laboratory’s Phase VI wind turbine. Power was not reduced as expected for downwind, which may be attributed to inboard three-dimensional effects. Average flap bending loads were reduced with downwind coning and compared well with prediction. Fatigue loads were increased with downwind; however, fatigue was mitigated with a tower shroud. The shroud needs to align with the freestream, demonstrated by an increase in fatigue loads from a 10° shroud misalignment. Pressure data were acquired in the tower wake at the rotor location with and without the shroud. The …
Predication Of The Sources Of Particulate Polycyclic Aromatic Hydrocarbons In China With Distinctive Characteristics Based On Multivariate Analysis, Ruoyu Wang
May 2018
Predication Of The Sources Of Particulate Polycyclic Aromatic Hydrocarbons In China With Distinctive Characteristics Based On Multivariate Analysis, Ruoyu Wang
Ruoyu Wang
Particulate polycyclic aromatic hydrocarbons (PAHs) have the characteristics of high carcinogenicity, degradation resistance, and long-distance transport. It is necessary to determine the critical sources that contribute to PAHs in atmospheric particulatematter (PM), soils, and sediments. In the present study, particulate PAHs were collected from Chinese cooking, biomass combustion, waste incineration, coal combustion, and petroleum combustion in different regions of the Chinese mainland. Through linear regression analysis, the relationships have been investigated between different measurement units, including the mass of particulate PAHs per mass of particle matter, mass of particulate PAHs per volume of …
Resilience Is A Property Of A System And A Network, Igor Linkov, Benjamin D. Trump, Jeffrey Keisler
Feb 2018
Resilience Is A Property Of A System And A Network, Igor Linkov, Benjamin D. Trump, Jeffrey Keisler
Jeffrey Keisler
This e-Letter, available at http://science.sciencemag.org/content/359/6379/986/tab-e-letters, responds to the Science special issue on resilience. We argue that it in order to move from understanding resilience toward improving it, it is useful to incorporate not just the systems perspective, but also that of network science.
