基于遥感数据的东北三省植被春季物候对极端温度的响应特征

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中图分类号 X171 文献标志码A 文章编号 1007-7731(2026)02-0062-05

DOI号 10.16377/j.cnki.issn1007-7731.2026.02.017

nalysis of the response characteristics of vegetation start of the growing season in the three Northeastern Provinces to extreme temperatures based on remote sensing data

Li Yuning

(Harbin Normal University,Harbin15oO25,China)

AbstractTo explore the response mechanism of vegetation start of the growing season (SOS) in the three Northeastern Provinces to extreme temperature events,this studyutilized the MODIS NDVI dataset and remote sensing datasuchasERA5-Land,andemployedthedynamic thresholdmethod toextract thevegetation SOSofthisarea from 2001 to 2020.Based on the meteorological data from 1981 to 2020,the temperature threshold was determined using the percentile threshold method,andextreme temperature events from 2OO1 to 2O2O were extracted.The Theil-Sen trendanalysis method and Mann-Kendall test method were combined to investigate thechanges inthevegetation SOS inthe three northeastern provinces.Furthermore，Pearson correlation analysis was conducted to explore the relationship between the vegetation SOS and extreme temperature events.The results showed that thevegetation SOS inthe studyarea was mostlyconcentrated intheperiodfromday10Otoday130from2Olto2O20,withanoverall changerateof-0.25d/a,indicatingan advancing trend.Thevegetation SOSwas generallynegatively corelated with extreme high-temperature indicators,and the response to extreme high-temperature events in March and April was moresignificant.However，thecorrelationwithextremelow-temperatureindicatorswasrelatively ambiguous.In summary,an increaseinthefrequencyand intensityof extreme high-temperature events willcausethevegetation SOS inthe studyareato advance.The response of the vegetation SOS in the studyarea to extreme low-temperature events is more complex.

Keywordsvegetation start of the growing season; normalized diffrence vegetation index;extreme temperature climate change; remote sensing

植被物候是植被整个生长发育过程的周期性现象，通过发芽、展叶、开花、落叶等关键节点的变化，反映对气候变化的响应。（剩余8634字）