河南省生长季演变特征分析

根据河南省52年(1961-2012)的111个气象站的气象数据,基于0℃、3℃、5℃、10℃、15℃和20℃共6个温度临界值,对生长季特征(生长季初日、生长季终日和生长季长度)的变化规律进行了分析研究,结果表明50多年来,河南省除豫中以外的豫北、豫东、豫西、豫南、豫西南五个地区生长季初日表现出了速度显著提前的趋势。生长季初日整体由东向西逐渐推迟,终日整体由东向西逐渐提前,生长季长度也由东向西逐渐提前。突变检验表明,生长季长度在六个临界温度值下均有较明显的延长趋势。

Spatial and temporal evolutionary characteristics of the growing season in Henan Province

Based on meteorological data from 111 meteorological stations in Henan Province for 52 years (1961-2012), the temporal variation patterns of growing season characteristics (growing season beginning day, growing season end day and growing season length) were analysed and studied based on six temperature thresholds: 0°C, 3°C, 5°C, 10°C, 15°C and 20°C. The results showed that for more than 50 years, except for central Henan, the other five northern, eastern, western, southern and southwestern Henan regions showed a trend of significantly earlier growing season beginning days. The beginning day was gradually delayed from east to west, the end day was generally advanced from east to west, and the length of the growing season was also advanced from east to west. The mutation test showed that the growing season length tended to lengthen more significantly at all six critical temperature values.