黑龙江省大兴安岭地区植被生长与北极震荡的关系

摘要

归一化植被指数(Normalized Difference Vegetation Index,NDVI)能够较好的反映植被的生长状况.根据2001-2015年NODIS/NDVI月值数据和北极震荡数据,探究北极震荡过程对黑龙江大兴安岭地区森林生长的影响,同时引入温度因子,对这种影响的机制进行了初步探讨,分析北极震荡过程是如何影响黑龙江大兴安岭地区森林的生长.研究结果表明:黑龙江大兴安岭地区森林生长与数千里之外的北极震荡过程具有较高的相关性.在生长季内,3月的北极震荡指数(AO)值和4月的NDVI值的决定系数为0.70,3月的北极震荡指数(AO)值能够解释4月的NDVI值的70%的变化.此外,北极震荡过程可以影响黑龙江大兴安岭地区的气温,而气温又能影响森林的生长,即北极震荡过程可以通过影响黑龙江大兴安岭地区的气温进而影响黑龙江大兴安岭地区森林的生长.此研究为林业工作者提供了一个新颖的视角,对更好地管理和利用森林资源具有重要意义.%Normalized difference vegetation index(NDVI)can reflect the condition of vegetation growth.Using the monthly data of MODIS/NDVI between 2001 and 2015,contemporaneous data of temperature and Arctic Oscillation(AO)index,we investigate the influence of Arctic Oscillation process on the forest growth of Daxinganling in Heilongjiang province.Furthermore,the meteorological factors are introduced.The mechanism of this effect is discussed,and the influence of Arctic Oscillation on the growth of forest in Daxinganling in Heilongjiang province is analyzed.The results show that the growth of forest in Daxinganling in Heilongjiang province is related to AO,which is away from it at thousands of miles.During the growing season,the AO in March was able to account for 70% of the NDVI change in April.In addition,the Arctic oscillation process can affect the temperature in Daxinganling in Heilongjiang province and the temperature can affect the growth of forests,so the Arctic oscillation process can affect the growth of forests in this area affected by the temperature.This study provides a new perspective for forestry workers to management and utilization of forest resources of great significance.