Now showing items 91-100 of 111
Local to Global Multi-Scale Multimedia Modeling of Chemical Fate and Population Exposure
(2017)
To assess environmental and human exposure to chemical emissions, two types of approaches are available: 1. intermediate- to high-resolution, substance/location-specific analyses, and 2. lower resolution, less specific ...
Interactions between Heliospheric and Ionospheric Plasma in Geospace
(2022)
The Sun interacts with the Earth through electromagnetic radiation, gravitationally, and through the solar wind. The solar wind carrying the Sun’s magnetic field interacts with the Earth’s magnetosphere and drives the ...
Evolution of Flux Transfer Events at the Magnetopause: MMS Observations and Global Hybrid-Vlasov Simulations
(2019)
Magnetic reconnection is the underlying physical process responsible for the release of energy stored in magnetic fields that powers plasma heating and acceleration. Flux transfer events (FTEs) are transient signatures of ...
Characterizing Heliospheric and Interstellar Interactions Using Pickup Ion Measurements
(2022)
The Heliosphere, orbiting the galactic center of the Milky Way, is a plasma bubble carved out of the Local Interstellar Medium (LISM) by the Sun's dynamic and magnetic influence. Its relative motion creates a steady inflow ...
Dynamics of the Jovian Magnetosphere: Combining Insights from Global MHD Simulations and In Situ Measurements From the Juno Spacecraft
(2021)
Unlike the terrestrial magnetosphere, which responds strongly to changes in the solar wind and interplanetary magnetic field, Jupiter's magnetosphere depends largely on internal processes related to its strong planetary ...
Development of the Next Generation High-Sensitivity CdZnTe Imaging Gamma-Ray Spectrometer for Planetary Science Applications.
(2013)
The Probing In situ with Neutrons and Gamma-rays (PING) instrument, developed at NASA Goddard Space Flight Center (GSFC) by the neutron/gamma-ray group, is a technology used to determine the subsurface elemental composition ...
Efficient Output-Based Adaptation Mechanics for High-Order Computational Fluid Dynamics Methods
(2018)
As numerical simulations are applied to more complex and large-scale problems, solution verification becomes increasingly important in ensuring accuracy of the computed results. In addition, although improvements in ...
The Significance of Proton Beams in the Multiscale Solar Wind
(2019)
The solar wind is a multiscale, near-collisionless plasma. Three significant timescales are decades, days, and seconds. These timescales are associated with the solar cycle, Coulomb collisions, and instabilities, ...
New Applications of Satellite-Measured Tropical Cyclone Wind Speeds
(2021)
Major hurricanes are becoming more frequent due to climate change and the warming of the oceans. Now more than ever, the ability to model hurricanes accurately and provide advanced warning to affected areas is crucial. ...
Understanding the Impacts of Mesosphere and Lower Thermosphere on Thermospheric Dynamics and Composition
(2021)
The Earth’s Ionosphere and Thermosphere (IT) is a highly dynamic system persistently driven by variable forcings both from above (Solar EUV and the magnetosphere) and the lower atmosphere. The forcing from below accounts ...