通过ANUSPLINE空间插值以及气候学意义上的幂函数换算,探讨中国大陆生态区紫外辐射时空动态变化规律。结论如下:(1)紫外辐射多年平均值和多年季节平均值大致以季风区和非季风区分界为界线,呈现西部高东部低的总体格局,这主要与中国的地势和气候特点有关。(2)部分生态区40 a来年和四季紫外辐射呈显著减少趋势;冬季的紫外辐射年际间变化程度较大,其次是夏季和秋季,春季和年均紫外辐射年际变化较小;可分1961~1972、1973~1990、1991~2000 年3个时段,大部分生态区第二时段年和季节紫外辐射平均值较小,第三时段普遍又开始增大,比第一时段小。
The UV of some eco-regions of China present reduction trend; the inter-annual change of winter is the biggest among four seasons, followed by summer, autumn, and spring. The annual change UV is small. It can be divided into three stages i. e. 1961-1972, 1973-1990 and 1991-2000. The second stage of the annual and seasonal average UV in a large part of eco-regions is lower than the first stage and the third stage, and the first stage takes on the biggest stage.
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