青海共和盆地现代气候特征及其变化趋势

通过对青海共和盆地内共和、贵南、河卡和沙珠玉等台站近30年气象资料的初步分析,认为该区现代气候具有气温较低、冷热剧变;降水量少,变率大;风力大、频率高;霜期长、无绝对无霜期等四个特征。在气候区划上应属青藏高原温带内的半干旱干草原和干旱荒漠气候区。根据区内温度、降水的多年变化以及温度高、降水多的组合类型出现的机率最少这个事实,提出到本世纪末、下世纪初,如果温度、降水的自然变化趋势不出现大的波动,则随着人类活动的增温效应的出现,本区的气侯可能更为干旱。

The Character of Modern Climate in Gonghe Basin and Its Dynamic Variance

By analyzing the meteorological data at weather stations of Gonghe, Guinan, Heka and Shazhuyu of Qinghai province during last three decades, it is referred that the modern climate of this region is characterized by lower air temperature and high fluctuation of cold and worm weather, by inadequate precipitation and frequent variation, by strong wind force and high frequence and by long frost season without absolute free-frost days.From the viewpoint of climatic classification, this region belongs to climatic zone of semi-arid steppe and arid desert in the temperate zone of Qinghai-tibet plateau.According to the facts of 30 years variations of temperature and precipitation and of minimum frequences of occurrence of high temperature and adequate precipitation, it is presented in the study that, to the end of the Century and the early of next Century, the temperature-increasing effect will be caused along with the human activities and the climate in the region will be possible to be more drier if even no greater fluctuation of natural dynamic changes of temperature and precipitation took place.