26597.行星際條件對極光的影響

1、中國科學(xué)院研究生院博士后學(xué)位論文行星際條件對極光的影響姓名：楊亞芬申請學(xué)位級別：博士后專業(yè)：地球物理學(xué)；空間物理學(xué)指導(dǎo)教師：呂建永；王勁松201110AbstractTheauroraisaninterestingphenomenonresultingfromthesolarwind—magnetosphere卜ionospherecouplingAvarietyofactivitiesonSuncausethedisturbances

2、oftheinterplanetarymagneticfield(IMF)andsolarwindWhenthesedisturbancesarriveEarth，theywilldisturbancetheEarth’Smagnetosphereionosphere，andthenproducetheauroraathighlatitudesVariationsinthesolarwinddynamicpressurecancreat

3、echangesintheall—roralbrightness，especiallyinthedaysideregion(06—08MLT)MainlyusingPolarUltravioletImager(uVI)auroralimagesandNASAOMNImagneticfieldandplasmadata，weinvestigatetherelationshipbetweeninterplanetaryparam—eters

4、anddaysideauroraintensificationⅥkfirstidentifythedaysideauroracasescausedbythesolarwinddynamicpressureincreasesthrough1997，1998and1999，anddividethesecasesintotwotypes：onewithintensificationandtheotherwithoutsignificantin

5、tensificationfollowingtheincreaseofthesolarwinddynamicpressureThenwecasebycaseexaminetheseparateroleofthesolarwinddensityandvelocityonauroralbrightnessOurresultdemonstratesthatthedaysideauroraintensificationrequirestheco

6、ntributionsofboththedensityandsolarwindvelocityincreasesThesolarwinddensityincreasealone(withoutvelocityincrease)couldnotcreatethedaysideauroraintensificationOntheotherhandthroughintegratingtheauroralenergyfromPolarUVIau

7、roralimageswhichhavethewholeauroalovals，andcombiningtheobservationdataofIMFandsolarwindfromNASA0MNI，weinvestigatetheinfluenceofIMFandsolarwindonauroralactivities，andanalyzetheseparateroleofthesolarwinddensityandvelocityo

8、naurora，respectivelyWestatisticallyanalyzetheauroralenergyindifferentregions(dawnside，dayside，duskside，nightside)andtheinterplanetaryconditions，andfindthat：WhenIMFBzissouth，theeffectofIMFonaurorasinthedawnsideandnightsid