摘要
基于 MODIS/TERRA 、FY -3B/MERSI 和 HJ/CCD 监测数据，结合研究区同步土壤湿度实测资料，利用垂直干旱指数（PDI），对比分析了各传感器在干旱时空动态中对旱情响应的敏感性和可靠性。结果显示：在黄土高原半干旱区各遥感卫星监测到的 PDI 指数与土壤相对湿度呈显著负相关，与0～20 cm 相对湿度相关最为密切；MODIS 的 PDI 监测信息与实际春旱发展前期状况最为接近，HJ 的 PDI 监测信息对干旱后期效应性相对较差，HJ 、MODIS 和 FY3B 的 PDI 监测信息都能够比较真实的反映干旱缓解后的实际情况。
Based on the MODIS/TERRA ,FY - 3B/MERSI and HJ/CCD monitoring data ,combined the syn-chronous measured soil moisture data in research area ,using the perpendicular drought index （PDI） ,comparatively ana-lyzed the sensitivity and reliability of various sensors responded to drought .The results showed that ：It was the negative correlation between the PDI indexes with the soil relative moisture from the various remote sensing of satellites in the semiarid Loess Plateau ,and it was the most close with the relative soil moisture in 0 ~ 20 cm depth ,also the monitoring PDI index of the MODIS was more close with the real situation in early spring drought development ,but the PDI moni-toring information of HJ was relatively poor to drought effects in late ,the whole PDI monitoring information of the HJ , MODIS and FY3B can be reflected the actual situation after the drought relieved .
出处
《干旱地区农业研究》
CSCD
北大核心
2014年第2期47-51,共5页
Agricultural Research in the Arid Areas
基金
科技部农业科技成果转化资金项目(2011GB24160005)
关键词
遥感卫星数据
垂直干旱指数
黄土高原半干旱区
土壤相对湿度
remote sensing data of satellite
perpendicular drought index
semiarid Loess Plateau
relative soil moisture
