摘要
用1971～2004年甘肃黄土高原39个站的气温10℃初日和高空资料，分析了其气候特征和环流背景，建立了预测方法．结果表明，甘肃黄土高原日平均气温稳定通过10℃的初日有3个偏早区，分别位于北道、兰州、泾川；有3个偏迟区，分别位于华家岭、东乡、岷县附近．初日早年甘肃黄土高原500hPa、700hPa高度场和温度场为宽广的脊控制，OLR场受正距平控制；初日迟年甘肃黄土高原500hPa、700hPa高度场和温度场深厚的槽影响，OLR场受负距平影响．
Based on 39 stations on Gansu loess plateau and the upper air materials from 1971 to 2004, the beginning date being at 10℃, the features of its climate and the circulation background are analyzed. The forecast method is established. The result indicates that there are 3 early districts which lie respectively in Beidou, Lanzhou and Jingchuan and also 3 late districts, which lie in Huajialing, Dongxiang and Minxian County. The early loess plateau 500 hPa of Gansu 700 hPa high playground and temperature field were controlled by a broad ridge while the late annual loess plateau 500 hPa, 700 hPa high playground and temperature field influenced by the deep trough of Gansu.
出处
《甘肃科学学报》
2007年第1期101-104,共4页
Journal of Gansu Sciences
基金
甘肃省科技攻关项目(GS022-A45-149)
关键词
甘肃黄土高原
10℃气温初日
分布特征
环流特征
预测方法
Gansu loess plateau
beginning date at 10℃
characteristics of distribution~ characteristic ofcirculation
method for forecasts
