CAJ | 학술논문

干旱是影响社会发展和农业生产的主要气象灾害之一。利用中国新一代极轨气象卫星FY-3A上搭载的250 m中分辨率光谱成像仪（MERSI）数据，基于垂直干旱指数（PDI），结合山东省旱情统计数据，建立了适合山东省的PDI干旱指数分级标准，在此基础上对山东省2010～2011年秋冬季的干旱状况进行了监测，并将监测结果与同期的降水、温度和干旱监测资料以及19个国家级农气站的土壤相对湿度资料进行对比分析。结果表明：基于FY-3A/MERSI 250 m分辨率卫星资料计算的PDI能够客观反映山东省旱情的空间分布和动态发展过程。PDI与对应实地观测的10 cm、20 cm土壤相对湿度之间有较好的负相关性，且20 cm的土壤相对湿度较10 cm的土壤相对湿度与PDI的相关关系更稳定。因此，利用FY-3A/MERSI卫星资料监测山东省干旱状况具有可行性，适于在干旱监测业务中推广应用。
간한시영향사회발전화농업생산적주요기상재해지일。이용중국신일대겁궤기상위성FY-3A상탑재적250 m중분변솔광보성상의（MERSI）수거，기우수직간한지수（PDI），결합산동성한정통계수거，건립료괄합산동성적PDI간한지수분급표준，재차기출상대산동성2010～2011년추동계적간한상황진행료감측，병장감측결과여동기적강수、온도화간한감측자료이급19개국가급농기참적토양상대습도자료진행대비분석。결과표명：기우FY-3A/MERSI 250 m분변솔위성자료계산적PDI능구객관반영산동성한정적공간분포화동태발전과정。PDI여대응실지관측적10 cm、20 cm토양상대습도지간유교호적부상관성，차20 cm적토양상대습도교10 cm적토양상대습도여PDI적상관관계경은정。인차，이용FY-3A/MERSI위성자료감측산동성간한상황구유가행성，괄우재간한감측업무중추엄응용。
At present,drought is one of the important meteorological hazards on agriculture production and society development.As a big agricultural province in China,Shandong has a great vulnerability to drought.Based on the Medium Resolution Spectral Imager (MERSI)data with 250 m spatial resolution carried on the new Generation Polar-Orbiting Meteorological Satellite of China (FY-3A)and the drought statistical data by using the Perpendicular Drought Index (PDI),the grading standard of PDI were established, which is more suitable for drought monitoring in Shandong Province.On this basis,the drought of Shandong Province from the autumn 2010 to the winter 201 1 was monitored.In addition,the data of the rainfall,temperature,drought monitoring information and soil moisture obtained at 19 national agro-meteorological monitoring stations were used to verify the precision monitored by PDI.The re-sults show that the PDI obtained by FY-3A/MERSI satellite data was able to objectively reflect the spatial distribution and dynamic developing process of drought in Shandong Province.PDI had significant negative correlation with the relative soil moisture under 10 cm and 20 cm depth,and the correlation with the relative soil moisture of 20 cm depth was more stable than that of 10 cm depth.There-fore,the drought monitoring in Shandong Province based on FY-3A/MERSI satellite data was feasible,and it was suitable to wide-spread application in drought monitoring operation.