CAJ | 학술논문

随着近年来灰霾天气影响区域和爆发频次的增多，灰霾已经严重影响到了卫星遥感对归一化植被指数（NDVI）的反演精度。现有针对气溶胶污染天气下的 NDVI 反演方法不适合非浓密植被地区和高气溶胶污染负载天气等情形。本文选取了珠江三角洲一次灰霾事件爆发前和爆发中的连续两天的 MODIS（Terra）数据，构建了分区去气溶胶植被指数（ZAFRI，Zonal Aerosol Free Vegetation Index），用以反演“污染日”的植被指数。结果显示本方法可较好地消除大气气溶胶对 NDVI 的影响， ZAFRI 比直接用 NASA 反射率产品计算的 NDVI 精度更高，可以作为灰霾“污染日”的 NDVI 替代指标。本方法将去气溶胶植被指数（AFRI）推广至珠江三角洲陆表各类区域上，为同类灰霾污染区域的 NDVI 反演提供一个新的可行途径。
수착근년래회매천기영향구역화폭발빈차적증다，회매이경엄중영향도료위성요감대귀일화식피지수（NDVI）적반연정도。현유침대기용효오염천기하적 NDVI 반연방법불괄합비농밀식피지구화고기용효오염부재천기등정형。본문선취료주강삼각주일차회매사건폭발전화폭발중적련속량천적 MODIS（Terra）수거，구건료분구거기용효식피지수（ZAFRI，Zonal Aerosol Free Vegetation Index），용이반연“오염일”적식피지수。결과현시본방법가교호지소제대기기용효대 NDVI 적영향， ZAFRI 비직접용 NASA 반사솔산품계산적 NDVI 정도경고，가이작위회매“오염일”적 NDVI 체대지표。본방법장거기용효식피지수（AFRI）추엄지주강삼각주륙표각류구역상，위동류회매오염구역적 NDVI 반연제공일개신적가행도경。
Haze has a strong impact on the precision of NDVI inversion by satellite remote sensing,with more regions being hit by haze more frequently in recent years. The inadequacy of existing inversion methods of NDVI in aerosol con-tamination weather is obvious in the case of non-dense vegetation and heavy load of aerosol contamination. This paper selects the MODIS(Terra)data for two successive days before and during the outbreak of a haze incident,establishing the Zonal Aerosol Free Vegetation Index to achieve the inversion of the NDVI in polluted days. The results show that this method can eliminate aerosol effects to NDVI better,and ZAFRI method has better precision than the NDVI directly cal-culated by NASA reflectivity products,and it can serve as a surrogate marker of NDVI in haze polluted days. This method generalizes the AFRI to all kinds of land surface regions,providing a new feasible method for the NDVI inversion in the same kinds of regions polluted by haze.