吉林大学学报(地球科学版) ›› 2021, Vol. 51 ›› Issue (3): 864-876.doi: 10.13278/j.cnki.jjuese.20200161
王凤艳1, 王梓铭1, 王明常1, 姜琦刚1, 杨天亮2, 张馨月1, 赵明宇1
Wang Fengyan1, Wang Ziming1, Wang Mingchang1, Jiang Qigang1, Yang Tianliang2, Zhang Xinyue1, Zhao Mingyu1
摘要: 为了研究中蒙俄经济走廊沿海与内陆地区归一化植被指数(NDVI)的分布特征,利用MOD13Q1 NDVI数据集、MERRA2气象再分析数据和AVHRR土地覆盖数据,以中蒙俄经济走廊研究区内2种代表性植被(林地和树木茂盛的草地)为例,采用回归分析法和相关性分析法研究了近年来研究区NDVI在不同纬度、距海岸线不同距离及不同时间的变化特征,并分析了气温与降水对NDVI的影响。结果表明:2015—2019年内5月下旬—9月,沿海地区植被生长状态基本优于内陆地区,从距离海岸线500 km左右开始,NDVI明显下降;沿海地区(0~500 km)与内陆地区NDVI在时间变化上也略有不同,沿海地区2种代表性植被的NDVI时序变化模型拟合效果较好。受沿海与内陆地区降水、气温差异影响,在植被生长顶峰期(0719—0723),随着纬度上升,沿海与内陆地区NDVI差异逐渐减小:沿海地区NDVI在上升期比内陆地区约提前1个月进入饱和,下降期滞后约1个月;低纬度地区2种植被对降水量更为敏感,相关系数最高为0.393(显著性水平P<0.01),而高纬度地区两种植被对气温更为敏感,相关系数最高为0.534(P<0.01)。
中图分类号:
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