摘要
通过2006~2016年中等分辨率成像光谱仪MODIS(Moderate Resolution Imaging Spectroradiometer)的MCD12Q2数据集和NPP(Net Primary Productivity,净初级生产力)数据MOD17A3HGF为数据源,研究河北省的草地和林地的物候期:生长季起始期SOS(Start of Season)、生长季结束期EOS(End of Season)和生长季长度LOS(Length of Season)的多年均值空间分布和多年变化趋势,通过相关分析法研究草地和林地的物候期对NPP的相关关系,并进行显著性检验判断变化趋势和相关系数在α=0.05水平上的显著性。结果表明:河北省草地SOS大多出现在第108~153 d,EOS大多出现在第273~304 d,LOS大多为128~190 d。林地SOS大多出现在第107~128 d,EOS大多出现在第282~306 d,LOS大多为162~194 d。河北省草地和林地的SOS主要呈现出提前趋势,EOS呈现延后趋势,LOS主要呈现增长趋势;草地和林地的物候期与NPP主要呈现中度相关,其中SOS与NPP主要呈现负相关,EOS、LOS与NPP主要呈现正相关。
Moderate Resolution Imaging Spectroradiometer(MODIS)MCD12Q2 dataset and MOD17A3HGF NPP(Net Primary productivity)data were used as data sources to study the spatial distribution and change trend of annual mean of phenological period of grassland and woodland in Hebei Province.The phenological period included Start Of growing Season(SOS),End Of growing Season(EOS)and Length Of growing Season(LOS).The correlation between phenological period of grassland and woodland and NPP was studied by correlation analysis method,and the significance of change trend and correlation coefficient atα=0.05 level was judged by significance test.The results showed that SOS of grassland in Hebei Province mostly appeared on 108~153 DOY(day of year),EOS mostly appeared on 273~304 DOY,most of LOS was 128~190 days.while SOS of woodland mostly appeared on 107~128 DOY,EOS mostly appeared on 282~306 DOY,most of LOS was 162~194 days.SOS of grassland and woodland in Hebei Province showed early trend,EOS showed delayed trend,and LOS showed growing trend;the phenological period of grassland and woodland was mainly moderately correlated to NPP,and SOS was mainly negatively correlated to NPP,while LOS and EOS were mainly positively correlated to NPP.
作者
张晨
袁金国
Zhang Chen;Yuan Jinguo(School of Geographical Sciences,Hebei Normal University,Shijiazhuang 050024,China;Hebei Technology Innovation Center for Remote Sensing Identification of Environmental Change,Shijiazhuang 050024,China;Laboratory of Environmental Evolution and Ecological Construction in Hebei Province,Shijiazhuang 050024,China;Tangshan Fenghuang Middle School,Tangshan 063000,China)
出处
《遥感技术与应用》
CSCD
北大核心
2022年第1期205-217,共13页
Remote Sensing Technology and Application
基金
国家重点研发计划项目(2016YFD0801005)
河北师范大学重点基金(130539)
河北省高校重点学科建设项目。
