yearly variation meaning in English
年变动
年变化
年变量
Examples
- The precipitation frequencies is analysed according to 1956 ~ 2000 years of rainfall record series in baoding area . the features of distribution of rainfall are detailed evaluated . firstly , the distribution of monthly precipitation is not even . for instance . the annual rainfall amount is about 548mm in whole year , about 80 % of them in summer season . secondly , yearly variation of rainfall is greater . thirdly , the abundant years usually are followed by short years , but the important changes have taken place in the last decades . before 70 ' s the abundant years took the dominant position , from the 70 ' s to the middle of 80 ' s the short years took place more frequently than ever . after the later of 80 ' s , the short years hold the main position . the above knowledge is instructive for guiding the rainwater resources effective utilization
本文利用1956 2000年保定市的长系列降雨资料，对保定市降水量进行了频率分析、年内变化分析和多年变化分析，明确了保定市降水量年内、年际间的变化情况：保定市降水量年内分配不均，汛期( 6 - 9月)占年降水量的81 。保定市降水量年际间变化大，丰水年和枯水年交替发生， 70年代以前以丰水年段为主； 70年代到80年代前期降水量丰枯交替频繁，总的接近于枯水年段； 80年代后期至今以枯水年段为主。这种降水分布规律对农业生产雨水资源的高效利用具有重要的指导意义。 - In order to provide scientific advice for wintertime agricultural production in guangdong province , we analyzed and studied the yearly variations and spatial distribution of the winter chilling damage in guangdong for the latest 44 years by using mean daily temperature and daily minimum temperature of 22 meteorological stations in guangdong from december , 1957 to february , 2001
用广东省22个分布较均匀的代表站1957年12月? 2001年2月冬季( 12月? 2月)逐日平均气温和最低气温资料，对广东省近44年来冬季寒害的发生规律及地域分布特征进行了分析和研究，为广东省冬季农业生产提供科学指导。