摘要
利用青海１９５９～１９９６年月平均最高、最低气温以及总云量和日照时数等资料，在剔除台站迁移较大的站点之后，对青海高原近４０年来最高和最低温度的变化特征及其与云量和日照时数的关系进行了初步分析。结果发现，近４０年来青海高原最高气温秋冬季为弱的升温趋势，春季则为明显的降温趋势。最低气温各季都为升温趋势，秋、冬季最为明显，春、夏次之。无论最高、最低或是平均温度的变化趋势，都是高海拔地区（３０００ｍ以上）比低海拔地区（３０００ｍ以下）弱。相关分析表明，最高温度的变化与总云量和日照时数有关，最低温度的升高则与总云量的增加有关。
The linear trends of maximum and minimum temperat ure in the Qinghai Plateau and their relationship between the both and total clo ud amount and su nshine time have been preliminarily analyzed.The results show that the maximum temperatures in the Qinghai Plateau displa y a weak warming trend in winter and autumn during rece nt 40 years (1959～1996), but they have obvious cooling trends in spring.The minimum temperatures show warming trend in all seasons especially in winter and autumn.Moreover,the long term trends of monthly maximum,minimum a nd average temperatures at the higher altitude areas(higher than 3 000 m) are al l weaker than those in the lower altitude areas (lower than 3 000 m). A close relationship between maximum temperatures and sunshine duration and tota l cloudness exists, while the minimum temperatures show strong relation to total cloud amounts,su ggesting that the extreme temperature in this area is influenced by increases of cloud amount and reduced insolation.
出处
《高原气象》
CSCD
北大核心
1999年第2期230-235,共6页
Plateau Meteorology
基金
国家"九.五"科技项目
关键词
青海高原
最低温度
总云量
日照时数
最高温度
Qinghai Plateau Maximum and minimum temperatu re Total cloudness Sunshine time
