摘要
通过对近 40年来秦岭南北地区气候变化及与ElNino/LaNina事件相关性研究发现 ,秦岭南北地区气温与降水同步波动 ,但波动幅度有差别。二者都有暖干化趋势 ,秦岭以北变暖程度超过秦岭以南 ,而秦岭以南年降水量的绝对减少量大于秦岭以北 ,两地年平均气温和年降水量差值有缩小趋势。LaNina事件对秦岭南北地区的影响大于ElNino事件 ,LaNina年年平均气温明显下降 ,超过极显著相关水平 ,而降水增多。ElNino年气温略有升高趋势 ,降水略有减少趋势 。
By the studies on the climate change in northern and southern regions of the Qinling Mountains and correlated analysis between climate change and El Nino / La Nina phenomenon during the recent 40 years, result shows that the air temperature and the precipitation has synchronous fluctuation in northern and southern regions of the Qinling Mountains, but fluctuation range has difference. Both of them have warming and drying tendency. In the north region, the warm level surpasses that in the south region, and the absolute reducing of annual precipitation in the south region is larger than that in the north region. The annually mean air temperature and the annually precipitation difference values between two regions have reduce trend. For the influence to climate, the La Nina phenomenon is larger than El Nino phenomenon in the northern and the southern regions of the Qinling Mountains. In the La Nina years, annual mean air temperature descends obviously, exceed extremely notable related level, and the precipitation grows. In the El Nino years, annual mean air temperature omits the trend going up, and the precipitation has slightly the trend reducing, but do not reach the statistics related level.
出处
《山地学报》
CSCD
2002年第4期493-496,共4页
Mountain Research
基金
国家自然科学基金项目 ( 4 0 0 710 0 5 )
陕西省自然科学基金项目 ( 99D0 1)资助
