Space Weather Effects of the April 15-23 2002 Geomagnetic Storm

Details Space Weather Effects of the April 15-23 2002 Geomagnetic Storm Space Weather Effects of the April 15-23 2002 Geomagnetic Storm

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja.....8177h&link_type=abstract

EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #8177

Computer Science

Scientific paper

One of the most important requirements for the space weather community is to improve ionospheric predictions for HF radio communications. During geomagnetic storm periods, the ionosphere undergoes dramatic variations including both increases and decreases of electron density compared with quiet days. A key component of understanding the observed ionospheric variations is to also understand the neutral thermosphere variations. In this paper, we discuss the April 15--21 2002 storm period. The ionospheric variations are measured using ground based ionosondes, radars, and satellite-borne instruments. The neutral parameters are determined from TIMED Global Ultraviolet Imager (GUVI) observations of the O/N2 ratio on the disk. A global 3D simulation of the coupled thermosphere-ionosphere using the NCAR TIMEGCM provides a framework for interpretation of the data, and for understanding the processes that drive the storm-time variability.

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