Using EOS/MODIS data obtained from 15 to 18 April in 2003 in Diebu fatal forest fire,the drought before fire,the fire region among fire and the fire area after fire are analyzed roundly. The result shows that EOS/MODI...Using EOS/MODIS data obtained from 15 to 18 April in 2003 in Diebu fatal forest fire,the drought before fire,the fire region among fire and the fire area after fire are analyzed roundly. The result shows that EOS/MODIS telemetry can improve ability to inspect forest fire and drought, and sustain forest fireproofing technically. The brightness temperature in day and night and NDVI obtained from 31 channel of EOS/MODIS can reflect the soil humidity and the vegetation, and can be used to forecast forest fire and estimate fire danger. The drought is reflected by EOS/MODIS telemetry in the first and second ten days of April 2003, and advantage Diebu fatal forest fire. EOS/MODIS can inspect forest fire continuously, and offer the fire region, fire area and temperature and so on. The fire area can be estimated by using the change of vegetation index in the fire.展开更多
文摘大气温湿廓线是数值预报中最基本的气象参数，高光谱红外卫星可以观测到较高垂直分辨率的大气信息，为了准确获取廓线信息，利用搭载于美国对地观测卫星Suomi NPP（national polar-orbiting partner-ship）平台上的CrIS（cross-track infrared sounder）红外高光谱观测资料，讨论了通道选取方法，采用特征向量统计法反演法得到初始大气廓线，利用非线性牛顿迭代法进一步提高反演精度。将反演结果和全球数据同化系统GDAS（global data assimilation system ）模式分析数据以及配对的无线探空值进行比较，发现反演结果与真值趋势一致，较之初始廓线有显著提高，在100～700 hPa之间，温度廓线反演精度最高，均方差小于1 K ，在300～900 hPa之间，湿度廓线反演精度最高，均方差小于20％，与所选取通道的雅各比峰值区间一致。
文摘Using EOS/MODIS data obtained from 15 to 18 April in 2003 in Diebu fatal forest fire,the drought before fire,the fire region among fire and the fire area after fire are analyzed roundly. The result shows that EOS/MODIS telemetry can improve ability to inspect forest fire and drought, and sustain forest fireproofing technically. The brightness temperature in day and night and NDVI obtained from 31 channel of EOS/MODIS can reflect the soil humidity and the vegetation, and can be used to forecast forest fire and estimate fire danger. The drought is reflected by EOS/MODIS telemetry in the first and second ten days of April 2003, and advantage Diebu fatal forest fire. EOS/MODIS can inspect forest fire continuously, and offer the fire region, fire area and temperature and so on. The fire area can be estimated by using the change of vegetation index in the fire.
