宇宙线福布希下降对京津冀地区闪电计数的短期影响

Short term effect of Forbush Decrease on the lightning frequency over Beijing Tianjin-Hebei region

研究 1 989年～ 1 994年间夏季前后福布希下降对LLP80 - 0 2型闪电定位系统在此期间于京津冀地区所测的 2 2 732 6次闪电活动的短期影响后发现 ,在所覆盖的 60 0km× 60 0km区域内 ,在渤海湾至河北中部及河北西部一带 ,闪电次数存在两个数百公里尺度的正响应区 ,差异显著性置信度优于 5× 1 0 - 3.而在此区域内 ,闪电活动对耀斑爆发恰恰相反 ,是明显的负响应 .

The short term responses of 227 326 lightning measured by LLP80 02 to Forbush Decrease over Beijing Tianjin Hebei region around the summers of 1989～1994 are studied.In the region of 600km×600km,there are two areas of positive obvious responses both with a scale of several hundred kilometers. They are in the Bohai Bay covering the middle of Hebei with a significanct level better than 5×10 -3 and the west of Hebei.But in these two areas,the responses of lightning activities to solar flares with just opposite behaviour are evidently negative.