地理科学 ›› 2000, Vol. 20 ›› Issue (4): 386-390.doi: 10.13249/j.cnki.sgs.2000.04.386

• 研究报道 • 上一篇    

长春地区稻田甲烷排放量的估算研究

闫敏华, 华润葵, 王德宣, 马学慧   

  1. 中国科学院长春地理研究所, 吉林, 长春130021
  • 收稿日期:1999-05-17 修回日期:2000-03-30 出版日期:2000-07-20 发布日期:2000-07-20
  • 基金资助:
    吉林省科学技术委员会青年基金资助项目(吉科合字第9634161号);中国科学院长春净月遥感站基金资助项目(站字第9504号)

Study on Estimation of Methane Emission from Rice Fields in Changchun Area

YAN Min-hua, HUA Run-kui, WANG De-xuan, MA Xue-hui   

  1. Changchun Institute of Geography, CAS, Changchun, Jilin 130021
  • Received:1999-05-17 Revised:2000-03-30 Online:2000-07-20 Published:2000-07-20

摘要: 1995~1997年3年的实验研究中,用静态箱法和气相色谱仪对长春地区不同水管理方式稻田的甲烷排放进行了采样和测量工作,1996年和1997年逢晴天还同步进行了地面实验基地的卫星遥感数据(TM和NOAA—AVHRR数据)的接收工作。根据测算的稻田甲烷排放通量和用遥感数据提取的水稻种植面积,估算出区域尺度的稻田甲烷排放总量。3年来的研究结果显示,长春地区水稻种植面积为17.7212×104hm2,稻田甲烷平均排放通量为2.984mg/(m2·h),长春地区稻田甲烷总排放量为0.0203Tg/a。用灰关联方法分析了稻田甲烷排放的影响因子,建立了以水稻植被指数为参数的淹灌稻田的甲烷排放通量估算模型

Abstract: The fluxes of CH4 emission from rice fields were measured by the method of static chamber in Changchun area in 3 consecutive years.The research results show that the mean flux of CH4 emission was 2.984mg/(m2·h) and the total amount of CH4 emission was 0.0203 Tg/a from the rice fields in Changchun area.Estimation of methane emission is a new application field of remote sensing.The estimating method of rice methane emission is as follows:1) TM and NOAA AVHRR data are used to measure rice area and to predict its change tendency; 2) rice NDVI values are got during various rice growth phases based on remote sensing of rice condition of growth; 3) the optimum correlation factor is elected according to gray system theory; 4) empirical formula between rice NDVI and CH4 fluxes of rice field is set up; 5) rice methane emission is estimated by rice area and NDVI.The method is used to estimate methane emission of rice field for the first time in Changchun area in 1996 and 1997.The results are acceptable after examination.

中图分类号: 

  • S161.9