祁连圆柏径向生长对气候要素响应的再分析

A re- analysis on the response of radial growth of Sabina przewalskii to the climatic change

基于国际年轮数据库中祁连圆柏树轮宽度数据建立了树轮宽度标准年表,利用相关函数检验了年表与临近气象站月(旬)平均气温、降水量之间的关系,旨在探讨旬值气候数据在树轮气候学研究中是否更具有优势,并从更精细时间尺度上揭示祁连圆柏径向生长与气候要素之间的关系。研究结果显示:多时段气候累积效应对树木径向生长的影响要高于单独时段气候对树木径向生长的影响;较月值气候数据组合,树轮年表与旬值气候数据组合之间具有更强的相关性。研究结果表明,在树轮气候学研究中,旬值气候数据的利用将有助于更精确表达树轮-气候间关系。研究结果有助于弥补树轮气候学研究中旬值气候数据应用的严重不足,为树轮气候学研究提供新的思路。

Based on the tree- ring width data from the International Tree- Ring Data Bank,we established ring- width standardized chronologies. Then,we analyzed the correlation between the standardized chronologies and historical temperature and precipitation in month and ten- day obtained from nearby meteorological stations. In order to discover whether ten- day temperature and precipitation data could draw a better conclusion than monthly data in dendroclimatology study or not,we compared the two correlation results and studied the tree radial growth in a more precise time- scale. The results show that multi- period climate had a cumulative effect on sabina przewalskii radial growth and a stronger impact than a single period climate. Compared with monthly data,the relationship between ten- day climatic data and ring- width chronologies was stronger. What＇s more,in the dendroclimatology research,ten- day climate data contributed to the more precise to express the relationship between tree- ring and climate,enabling our research to compensate for dendroclimatology study and to provide fresh ideas in this area.