J4 ›› 2004, Vol. 22 ›› Issue (4): 60-63.

• 论文 • 上一篇    下一篇


(中国气象局兰州干旱气象研究所,甘肃省气候变化与防灾减灾重点实验室,甘肃兰州 730020)   

  1. (中国气象局兰州干旱气象研究所,甘肃省气候变化与防灾减灾重点实验室,甘肃兰州 730020)
  • 收稿日期:2004-09-02 修回日期:2004-11-05 出版日期:2004-12-31 发布日期:2004-12-31
  • 作者简介:梁芸(1975-),女,宁夏中卫人,助理工程师,从事卫星遥感业务服务工作

A Method to Identify Forest and Grass Fire in Gansu Province

 LIANG  Yun   

  1. (Institute of Arid Meteorology,CMA,Key Laboratory of Arid Climate Change and Reducing Disaster, Lanzhou 730020,China)
  • Received:2004-09-02 Revised:2004-11-05 Online:2004-12-31 Published:2004-12-31



关键词: EOS/MODIS, 亮温, 阈值, 火灾


Using the EOS/MODIS data of six forest and grassland fires which occurred during 2002,12~2003,5 in Gansu province,
the relation of the brightness temperature in channel 20 and 31 was analyzed, including fire area, fire influencing area and normal
environment, and an approximate threshold was found.The results indicate the normal environment always on condition of (T20-
T31)/T20<0.08,fire influencing area always on condition of 0.08<(T20-T31)/T20<0.093,and the fire area always on condition
of(T20-T31)/T20>0.093. By quantitatively distinguishing the“4.15”forest fire in Diebu with this method, it has proved that
the threshold has a good effect on the fire region’s identifying and fire area’s estimating. This method can be applied in the operation
for forest and grassland fire mornitoring.

Key words: EOS/MODIS, brightness temperature, threshold, fire