Conveners
Poster Session 1.6
- Manolis Georgoulis (RCAAM of the Academy of Athens)
We present a statistical study on the early evolution of coronal mass ejections (CMEs), to better understand the effect of CME (over)-expansion and how it relates to the production of Solar Energetic Particle (SEP) events. We study the kinematic CME characteristics in terms of their radial and lateral expansion, from their early evolution in the Sun’s atmosphere as observed in EUV imagers and...
Although the sources of the fast solar wind are known (the coronal holes), the exact acceleration mechanism of the fast solar wind is still not fully understood. An important factor that can improve our understanding is the combination of remote sensing and in-situ measurements.
In order to combine them, it is necessary to accurately identify the source location of the in-situ solar wind with...
The strive for improving space weather forecasts naturally comes with the need for a standardized validation scheme for the involved models. Especially the performance of coronal (magnetic field) models that form the lower boundary of forecasting simulations is crucial as their errors are further propagated by solar wind models. We therefore developed a benchmarking system, allowing the...
For forecasting the arrival of coronal mass ejections (CMEs) at Earth, heliospheric 3D models such as EUHFORIA (EUropean Heliospheric FORcasting Information Asset) [Pomoell and Poedts,2018] rely on the correct observational input of the initial, near-Sun CME parameters (e.g. latitude, longitude, velocity, angular width, etc). The input parameters can be obtained by fitting the structure of...
The EUropean Heliospheric FORecasting Information Asset (EUHFORIA, Pomoell and Poedts, 2018) is a physics-based heliospheric and CME propagation model designed for space weather forecasting and other scientific studies. Although EUHFORIA can predict the solar wind plasma and magnetic field parameters at Earth, it is not designed to evaluate geomagnetic indices like Disturbance-storm-time (Dst)...
Time-series of historical solar irradiance variations is an important input to climate models. An extension of the record of direct irradiance measurements available since 1978 to earlier times is only possible with the help of models. For this, we need to know the evolution of the surface magnetic field. The longest record of direct observations of solar activity is the sunspot number...
The role of magnetic reconnection in the acceleration of coronal mass ejections (CMEs) has been widely discussed. However, because CMEs are found to have expansion speed which is comparable to propagation speed in the corona, it is still not clear about which portion of the reconnection contributes to the acceleration and expansion separately. To address this question, we analyze a fast CME...
