摘要
通过对南亚高压的季节性变化与甘肃省春季第一场≥10mm的区域性降水即第一场透雨出现时间和初夏转入多雨期的统计分析,初步揭示了南亚高压在季节性变化过程中及最终在青藏高原上空建立与甘肃省特别是甘肃河东地区春季第一场透雨及转入多雨期的相关关系。分析结果表明,南亚高压在季节性变化过程中登上中南半岛与甘肃省河东地区春季第一场透雨的出现具有显著关系,南亚高压在青藏高原上空建立与甘肃省初夏转入多雨期同样具有显著关系。因此,准确掌握南亚高压的季节性变化及登上高原的日期,不论对于准确预报出春季第一场透雨,还是转入多雨期,都有着重要的参考和指导意义。
According to statistical analysis of the seasonal change of the South Asia high, the date of the first regional precipitation over 10mm(the first soaking rain) in spring and the date of changing to more rain period in early summer in Gansu province, the paper reveals the correlativity primarily among the South Asia high during its seasonal change and setting up above Qinghai-Tibet Plateau, the first soaking rain in spring and changing to more rain period in early summer in Gansu especially in the east region of the River. Analyse results indicate that there is remarkable relation between the South Asia High visiting the Middle-Southern Peninsulas during its seasonal change and the first soaking rain in spring in Gansu, and between the South Asia high setting up above Qinghai-Tibet plateau and changing to more rain period in early summer in Gansu as well. So it's important to know the seasonal change of the South Asia high and the date of its visiting the Plateau for us to predict the appearance of the first soaking rain and the date of changing to more rain period accurately.
出处
《干旱气象》
2004年第1期34-37,共4页
Journal of Arid Meteorology
基金
甘肃省科技攻关项目"西北干旱成因及其应用"(GS012-A45-118)资助
关键词
南压高压
降水
季节性变化
甘肃
South Asian High
Gansu
the precipitation in spring,early summer
