摘要
根据平流层火山气溶胶传播规律研究,该文构建了反映火山喷发强度、平流层火山气溶胶相对浓度、火山气溶胶扩散速率和反映火山爆发地理位置并且按e指数规律衰减的火山活动指数(VEI)时空分布函数,进一步建立了北半球中高纬度、南北半球低纬度和南半球中高纬度3个1945-2008年逐月火山活动指数时间序列。根据3个逐月火山活动指数时间序列分别分析了北半球中高纬度、南北半球低纬度和南半球中高纬度火山活动对于相应纬度带地面气温的影响。研究表明:无论南北半球还是热带,火山活动强时地面气温下降,火山活动弱时地面气温上升,并且地面气温对于火山活动的响应明显滞后。
Based on the research of the propagation patterns of the stratospheric volcanic aerosols,the space-time distribution function of Volcanic Explosivity Index（VEI） with the exponential decay is constructed which can reflect the volcano eruption intensity,the relative concentration,the propagation rate of the stratospheric volcanic aerosols and the volcano eruption location.Furthermore,time series of the volcanic activity indexes（1945-2008） every 3 months at middle and high latitudes of the Northern Hemisphere,the low latitudes of the Northern and Southern Hemisphere and the middle and high latitudes of the Southern Hemisphere are built up. Based on the time series of volcanic activity indexes,the influences of the volcano activity on the surface temperature at middle and high latitudes of the Northern Hemisphere,at low latitudes of the Northern and Southern Hemisphere and at middle and high latitudes of the Southern Hemisphere,are analyzed separately.The results indicate that either at the Northern and Southern hemisphere or at the tropical zone the ground layer air temperature decreases when the volcanic activity is strong,while it increases when the volcanic activity is weak.At the same time,the variations of the ground layer air temperature lag behind those of the volcanic activity.
出处
《应用气象学报》
CSCD
北大核心
2010年第5期627-631,共5页
Journal of Applied Meteorological Science
基金
国家自然科学基金项目(40875041
40631006
40975038)资助
