TY - JOUR A1 - Hultqvist, B. T1 - Downward ion acceleration at auroral latitudes: cause of parallel electric field JO - Ann. Geophys. J1 - ANGEO VL - 20 IS - 8 SP - 1117 EP - 1136 Y1 - 2002/08/31 PB - Copernicus Publications SN - 1432-0576 UR - https://angeo.copernicus.org/articles/20/1117/2002/ L1 - https://angeo.copernicus.org/articles/20/1117/2002/angeo-20-1117-2002.pdf DO - 10.5194/angeo-20-1117-2002 ER -