The increase of O + ion loss rate through chemical reaction due to Joule heating and enhancement of ion temperature resulted from strong electric field played a crucial role in the auroral zone.

• 强对流电场引起大气焦耳加热与离子增温而使O+ 离子消失的化学反应速率增大所导致的电离损失 ,对极光椭圆区负暴起主要作用 ;