Space Weather at 75 AU
نویسنده
چکیده
Recent outer-heliosphere observations are reviewed from a space weather point of view by comparing the nature of solar wind, solar particle, and cosmic ray variations at the Voyagers and 1 AU. While the Sun still controls the interplanetary medium at 75 AU, the nearby boundaries of the heliosphere exert a strong influence on the environment.
منابع مشابه
Data Assimilation in the Solar Wind: Challenges and First Results
Data assimilation (DA) is used extensively in numerical weather prediction (NWP) to improve forecast skill. Indeed, improvements in forecast skill in NWP models over the past 30 years have directly coincided with improvements in DA schemes. At present, due to data availability and technical challenges, DA is underused in space weather applications, particularly for solar wind prediction. This p...
متن کاملApplication of a new phenomenological coronal mass ejection model to space weather forecasting
[1] Recent work by the authors has produced a new phenomenological model for coronal mass ejections (CMEs). This model, called the Tappin‐Howard (TH) Model, takes advantage of the breakdown of geometrical linearity when CMEs are observed by white‐light imagers at large distances from the Sun. The model extracts 3‐D structure and kinematic information on the CME using heliospheric image data. Th...
متن کاملA Study of the Influence of Percentage of Copper on the Structural and Optical Properties of Au-Cu Nanoparticle
Here we present our experimental results in synthesizing Au-Cu nano-particles with tunable localized surface plasmon resonance frequency through wet-chemical at temperature room. The reaction is performed in the presence of ascorbic acid as a reducing agent and polyvinyl pyrrolidone as capping agent via four different procedures: (1) mixture of 90% HAuCl4 and 10% CuSO4.5H2O precursors, (2) mixt...
متن کاملCharacteristic magnetic field and speed properties of interplanetary coronal mass ejections and their sheath regions
[1] Prediction of the solar wind conditions in near-Earth space, arising from both quasi-steady and transient structures, is essential for space weather forecasting. To achieve forecast lead times of a day or more, such predictions must be made on the basis of remote solar observations. A number of empirical prediction schemes have been proposed to forecast the transit time and speed of coronal...
متن کاملThe application of a new phenomelogical coronal mass ejection model to space weather forecasting
Recent work by the authors has produced a new phenomelogical forward model for coronal mass ejections (CMEs). This model, called the Tappin-Howard (TH) Model, takes advantage of the breakdown of geometrical linearity when CMEs are observed by white-light imagers at large distances from the Sun. The TH Model extracts three-dimensional structure and kinematic information on the CME using white li...
متن کامل