Wuppertal 2015 – wissenschaftliches Programm

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EP: Fachverband Extraterrestrische Physik

EP 2: Space-Weather-1

EP 2.2: Hauptvortrag

Montag, 9. März 2015, 17:30–18:00, G.10.02 (HS 9)

Ionospheric weather - an integral part of space weather — •Norbert Jakowski — German Arerospace Center, Neustrelitz, Germany

The ionosphere is on the one hand strongly impacted by space weather phenomena originating from the sun; on the other hand it is an integral part of space weather characterized by specific phenomena. These phenomena are closely coupled with associated thermospheric and magnetospheric processes. The talk reviews in particular those space weather effects which are observable by ground and space based GNSS measurements performed at DLR Neustrelitz since many years. Discussed are short- mid- and long- term effects caused by direct electromagnetic and corpuscular radiation associated with solar flares, solar rotation and solar cycle. As will be shown by selected case studies, Coronal Mass Ejections (CMEs) of the sun may heavily disturb regular ionospheric processes causing strong perturbations of the ionospheric structure and dynamics in particular at high latitudes. It is shown that ground and space based GNSS measurements provide valuable data sets to better understand generation and propagation of storm phenomena, to forecast them and to estimate their impact on modern telecommunication, navigation and radar systems. Degradation or even loss of their functionality caused by space weather hazards can be mitigated to some extent by ionospheric weather services whose tasks are briefly addressed.