不同空间分辨率热红外数据在近海核电厂温排水监测一致性研究

摘要

针对近年来我国核电厂大力发展而引起的核电温排水体污染的问题，该文利用相同日期的环境一号 B星（HJ-1B）红外相机与 Landsat ETM＋热红外波段数据，均采用辐射传输模型法反演出大亚湾区域海表温度，通过同日期 MODIS 海温产品作为基准，比较 HJ-1B 数据、Landsat ETM＋数据温度反演的差别，在此基础上，基于同一基准温度提取方法，开展 HJ-1B 数据、Landsat ETM＋数据及 MODIS 反演结果3种不同空间分辨率数据在近海核电站温排水监测的一致性进行了分析与评价。研究表明：ETM＋数据温度反演精度高于 HJ-1B 结果，且更能体现高温升区监测精度；基于劈窗算法的 MODIS 海温反演精度更高，但不能反映温排水温升分布细节；综合考虑具有较高时间分布率和较大幅宽的 HJ-1B IRS 数据更能满足业务需求。%The same date HJ-1B satellite infrared Scanner (IRS)and Landsat satellite ETM thermal infrared data were applied in inversing the sea surface temperature in Daya Bay using the single-channel radiative transfer model and the inversion temperature were compared based on the same date Terra satellite MODIS sea surface temperature product.Based on the same reference temperature extraction method,the thermal discharge and rising temperature region results were compared in MODIS, ETM and IRS data.The research showed that the ETM data,with higher temperature retrieval precision and better details in thermal discharge,were more suitable for monitoring high temperature region than IRS data.And MODIS data were not suitable for monitoring the thermal discharge details with 1000 meters resolution,although MODIS data with high accuracy in sea surface temperature retrieval.HJ-1 B satellite IRS data with high time resolution and large scanning width could best meet the thermal discharge monitoring requirements.