Now showing items 251-260 of 269
The STONE Curve: A ROC‐Derived Model Performance Assessment Tool
(Wiley, 2020-07-15)
A new model validation and performance assessment tool is introduced, the sliding threshold of observation for numeric evaluation (STONE) curve. It is based on the relative operating characteristic (ROC) curve technique, ...
Empirical plasmapause models from magnetic indices
(American Geophysical Union, 2003-02-18)
We use a database of CRRES in situ observations of plasmapause crossings to build empirical models of the plasmapause location as a function of geomagnetic indices. Previous models used the maximum value in Kp during the ...
International field intercomparison of atmospheric mercury measurement methods
(Kluwer Academic Publishers; Springer Science+Business Media, 1995-02)
To determine the extent of comparability of sampling and analytical procedures for atmospheric mercury (Hg) being used by different scientific groups around the world and hence the compatibility of measurement results, the ...
Wet deposition of mercury and ambient mercury concentrations at a site in the Lake Champlain basin
(Kluwer Academic Publishers; Springer Science+Business Media, 1995-02)
The “Great Waters” program, established in the 1990 Clean Air Act Amendments, mandated that atmospheric deposition of hazardous air pollutants to Lake Champlain (including Hg) be assessed. An assessment of the magnitude ...
Ambient levels and dry deposition fluxes of mercury to Lakes Huron, Erie and St. Clair
(Kluwer Academic Publishers; Springer Science+Business Media, 1995-02)
Ambient concentrations and dry deposition fluxes of Hg in the gas and particle phase to Lakes St. Clair, Erie and Huron were estimated with a hybrid receptor-deposition model (HRD). The ambient gas and particulate phase ...
Sources of mercury in the Arctic
(Kluwer Academic Publishers; Springer Science+Business Media, 1995-02)
Global and regional emission inventories of mercury are reviewed with special emphasis on the source regions with potential impact on the Arctic environment. These sources are located mostly in Eurasia and North America ...
Atmospheric sources, transport and deposition of mercury in Michigan: Two years of event precipitation
(Kluwer Academic Publishers; Springer Science+Business Media, 1995-02)
To assess the sources, transport and deposition of atmospheric mercury (Hg) in Michigan, a multi-site network was implemented in which Hg concentrations in event precipitation and ambient samples (vapor and participate ...
Energetic Electron Flux Predictions in the Near-Earth Plasma Sheet From Solar Wind Driving
(American Geophysical Union, 2022-09-19)
Suprathermal electrons in the near-Earth plasma sheet are important for inner magnetosphere considerations. They are the source population for outer radiation belt electrons and they pose risks to geosynchronous satellites ...
Nitrogen oxides, regional transport, and ozone air quality: Results of a regional-scale model for the midwestern United States
(Kluwer Academic Publishers; Springer Science+Business Media, 1993-03)
An overview of the role of NO x in the formation of rural O 3 , regional transport and its potential impact on urban air quality is presented. An analysis of a specific O 3 excursion in southeast Michigan (8-2-90) is ...