摘要
利用1982—2006年NOAA AVHRR-GIMMS NDVI和2002—2010年MODIS NDVI这2种数据并结合周边13个气象站的地表温度数据,分析1982—2010年黑龙江省多年冻土区生长季植被NDVI在时间和空间上的尺度变化及其与地表温度的响应关系。结果表明,黑龙江省多年冻土区生长季GIMMS NDVI和MODIS NDVI对植被NDVI具有很好的指示作用;1988—2004年植被波动较大,2004年以后植被增长趋势逐渐放缓,趋于平稳;在1982—2006年,植被NDVI与地表温度5月为显著正相关,6月相关性很弱,7、9、10月呈低度相关,8月则相关性显著。在2002—2010年,5、10月为低度相关,6月为显著相关,7—8月相关性较弱,9月为显著相关。总体来看,植被覆盖度不断变好;植被NDVI与地表温度具有较强的相关性,年际变化总趋势较为相似,具有同期性。
Using data of 1982-2006 NOAA AVHRR-GIMMS NDVI and 2002-2010 MODIS NDVI combined with surface temperature data of 13 weather stations,the spatial and temporal scales of the vegetation NDVI in growing season in the permafrost regions of Heilongjiang Province during 1982-2010 were studied and their response to surface temperature was analyzed.The research showed that the GIMMS NDVI and MODIS NDVI in the growing season of permafrost regions in Heilongjiang Province were consistent,and both had a good indication of vegetation NDVI.From 1988 to 2004,the trend of vegetation fluctuation was obvious.After 2004,the vegetation growth trend gradually slowed down and stabilized.During 1982-2006,vegetation NDVI was positively correlated with land surface temperature and significantly correlated in May.The correlation was very weak in June,with low correlation in July,September and October,and significant in August.During 2002-2010,May and October were low-level correlations,and June was a significant correlation,the correlation between July and August was weaker and September was significant.On the whole,the vegetation coverage continued to improve.The NDVI of vegetation had a strong correlation with surface temperature,and the interannual variations were similar and had the same period.
作者
李珺瑶
张冬有
王吉祥
LI Jun-yao;ZHANG Dong-you;WANG Ji-xiang(Heilongjiang Province Key Laboratory of Geographical Environment Monitoring and Spatial Information Service in Cold Regions,Harbin Normal University,Harbin,Heilongjiang 150025)
出处
《安徽农业科学》
CAS
2020年第14期72-77,共6页
Journal of Anhui Agricultural Sciences
基金
国家自然科学基金项目(41671064)。
关键词
NDVI
时空变化
地温
响应
黑龙江省多年冻土区
NDVI
Temporal and spatial variation
Ground temperature
Response
Permafrost region of Heilongjiang Province
