摘要
基于火灾信息资源管理系统(Fire Information for Resource Management System,FIRMS)MODIS(Moderate-resolution Imaging Spectroradiometer)与VIIRS(Visible Infrared Imaging Radiometer)的活跃火位置数据,按照2000—2018年不同时间(年、月、时)和空间(国家)尺度分析了北极地区活跃火动态变化,旨在为活跃火的预测和管理提供依据。研究结果表明:(1)2012—2018年,MODIS C6(MODIS Near Real-time 1 km active fire products,MCD14DL)与VIIRS V1(VIIRS Near Real-time 375 m active fire products,VNP14-IMGTDL_NRT)活跃火频次趋势一致,最大值与最小值分别出现在2013年与2015年;(2)北极地区活跃火频次累计最多的国家是俄罗斯,最少的国家是挪威,两套产品年际变化在不同国家特征颇为相似;(3)北极地区7国(俄罗斯、美国、加拿大、丹麦、挪威、瑞典和芬兰)活跃火现象主要集中在6—8月,活跃火观测时段主要集中在各国当地时间12时左右。
Based on Fire Information for Resource Management System(FIRMS),MODIS and VIIRS active fire position data,dynamic changes of active fires in the Arctic region were analyzed at different temporal(yearly,monthly,and hourly)and spatial(country)scales from 2000 to 2018,to provide a basis for the prediction and management of active fires.The results showed that:(1)from 2000 to 2018,MODIS C6(MODIS NRT 1 km active fire products,MCD14DL)and VIIRS V1(VIIRS NRT 375 m active fire products,VNP14IMGTDL_NRT)active fire frequency trends were consistent,with maximum and minimum values appearing in 2013 and 2015 respectively.(2)In the Arctic region,the country with the greatest cumulative active fire frequency was Russia,and the country with the lowest active fire frequency was Norway.The interannual variations of the two sets of products were quite similar in different countries.(3)The active fires in the seven countries of the Arctic region(Russia,the United States,Canada,Denmark,Norway,Sweden,and Finland)were mainly concentrated in June–August,and the active fire observation period was mainly concentrated around 12:00 local time in various countries.
作者
薛乃婷
张震
杜志恒
胡克宏
张莎莎
黄丹妮
Xue Naiting;Zhang Zhen;Du Zhiheng;Hu Kehong;Zhang Shasha;Huang Danni(School of Geomatics,Anhui University of Science and Technology,Huainan 232000,China;State Key Laboratory of Cryospheric Sciences,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China)
出处
《极地研究》
CAS
CSCD
北大核心
2020年第4期555-564,共10页
Chinese Journal of Polar Research
基金
国家自然科学基金(41701087)资助。
