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林业科学 ›› 2006, Vol. 42 ›› Issue (5): 98-103.doi: 10.11707/j.1001-7488.20060518

• 论文及研究报告 • 上一篇    下一篇

林火在空间上的波动性及其区域化行为

王明玉1 孙龙2 舒立福1 田晓瑞1   

  1. 1.中国林业科学研究院森林生态环境与保护研究所国家林业局森林保护学重点实验室,北京100091;2.东北林业大学林学院,哈尔滨150040
  • 收稿日期:2004-03-22 修回日期:1900-01-01 出版日期:2006-05-25 发布日期:2006-05-25

Fluctuation of Forest Fire in Spatial Space and Their Regional Behavior

Wang Mingyu1,Sun Long2,Shu Lifu1,Tian Xiaorui1   

  1. 1.Institute of Forest Ecology, Environment and Protection, CAF Key Lab. Of Forest Protection of State Forestry Bureau Beijing 100091;2.College of Forestry,Northeast Forestry University Harbin 150040
  • Received:2004-03-22 Revised:1900-01-01 Online:2006-05-25 Published:2006-05-25

摘要:

应用美国阿拉斯加州1950—2000年,加利福尼亚州1895—2001年及中国黑龙江省1980—1999年林火数据,分别计算出每年火灾发生的火场质心的经纬度坐标,用波谱分析研究其质心随年份的波动现象。结果表明:3个区域的林火的火场质心分别以一定的分布中心呈波动状态,其中火场质心在阿拉斯加州的分布中心为151.11°W、64.96°N,在加利福尼亚州的分布中心为120.02°W、37.11°N,在黑龙江省的分布中心为127.07°E、49.59°N。火场质心在美国阿拉斯加州和加利福尼亚州经度方向上均具有较强的周期性,阿拉斯加州的林火火场质心在经度方向的周期为4.2a和6.25a;加利福尼亚州的林火火场质心在经度方向上的波动周期为6.24a和106a。黑龙江省的林火火场质心在经纬度方向均具有较为明显的波动性,其周期为3.3a和6.67a。而阿拉斯加州和加利福尼亚州的林火火场质心在纬度方向上不具有周期性,林火发生以低频率的大面积火灾为主。

关键词: 森林火灾, 可燃物, 全球变化, 波动

Abstract:

Historical forest fires datum from Alaska State (1950—2000), California State (1895—2001), USA and Heilongjiang Province (1980—1999), P.R. China were used to calculate the longitude and latitude of annual burned area's centroids of these regions. Fluctuation phenomena by year were analyzed using spectrum analysis. The results showsed that burned area's centroids in these three regions are in fluctuation condition encircling the distribution center. The distribution centers in Alaska State, California State and Heilongjiang Province are 151.11°W Longitude, 64.96°N Latitude, 120.02°W Longitude, 37.11°N Latitude and 127.07°E Longitude, 49.59°N Latitude respectively. Fluctuation of burned area's centroids in Alaska State and California State in longitude has clear periodicity, and the periodicities are 4.2 a, 6.25 a in Alaska State and 6.24 a,106 a in California State. Fluctuation of burned area's centroids in Heilongjiang Province has periodicity both in longitude and latitude, and the periodicities are both 3.3 a, 6.67 a. Fluctuation of burned area's centroids in Alaska State and California State in latitude does not have periodicity, and low frequency large forest fires domain most of them.

Key words: forest fires, fuel, global change, fluctuation