林业科学 ›› 2026, Vol. 62 ›› Issue (6): 56-70.doi: 10.11707/j.1001-7488.LYKX20250583
高博洋1,徐健楠2,李伟克3,王明玉3,宁吉彬1,杨光1,*(
)
收稿日期:2025-09-22
修回日期:2026-02-12
出版日期:2026-06-10
发布日期:2026-06-13
通讯作者:
杨光
E-mail:yangguang@nefu.edu.cn
基金资助:
Boyang Gao1,Jiannan Xu2,Weike Li3,Mingyu Wang3,Jibin Ning1,Guang Yang1,*(
)
Received:2025-09-22
Revised:2026-02-12
Online:2026-06-10
Published:2026-06-13
Contact:
Guang Yang
E-mail:yangguang@nefu.edu.cn
摘要:
目的: 全球气候变暖、极端天气频发,导致雷击火灾的规模更大、强度更高、破坏性更强。探究大兴安岭雷击火灾的时空分布及聚集性演变规律,并识别其关键驱动因素,为雷击火灾的防控和管理提供科学依据。方法: 基于2013—2024年大兴安岭雷击火灾历史数据,综合运用统计分析、二维高斯核密度分析、地理探测器等方法,分析雷击火灾的动态演化规律、空间聚集特征及关键驱动因素的解释力。结果: 1) 12年间共发生雷击火灾791次,2019年达到峰值。雷击火灾主要集中在4—10月,尤其是春季防火期和夏季生长期,最早记录为4月24日,最晚为9月19日。春季防火期结束后雷击火灾数量回落,但于7月中旬再次达到高峰。每日13:00—17:00(不含 17:00 时刻)为雷击火灾的高发时段,占总发生次数的50%以上。2) 12年间雷击火灾整体在研究区西北部呈明显聚集。逐年分析显示,聚集区呈现年度差异。采用自然断裂法将雷击火灾核密度值划分为5个风险等级,南部地区通常为极低风险区域(仅2022年出现少量雷击火灾)。Getis-Ord Gi*显著性检验显示,极高风险区具有稳定的空间聚集特征。3) 前3日平均气温、月最高气温、海拔、月平均气温、0~7 cm土层土壤湿度和归一化植被指数是各年份中解释力最强的核心驱动因素。相对湿度和月平均气温(较高解释力出现次数9次)、海拔和归一化植被指数(7次)等组合在历年数据中解释力普遍较强,表明其对雷击火灾的发生影响较为显著。此外,月平均气温、月最高气温和海拔与其他驱动因素的组合亦具有较高解释力。结论: 近年来大兴安岭雷击火灾发生整体呈波动趋势,建议在夏季(特别是午后14:00时左右)加强对重点林区的防范。12年间雷击火灾在乌玛、永安山、图强和阿木尔地区持续呈显著聚集特征,部分年份(2015和2018年)雷击火灾事件分布较散,呈随机分布特征,无显著聚集。不同类型因子的交互作用存在差异,其中气象因子之间的交互效应较为明显,在雷击火灾的发生机制中占据主导作用。本研究揭示了雷击火灾的时空演化规律及关键驱动机制,为防火决策的精细化和区域化管理提供了科学依据。
中图分类号:
高博洋,徐健楠,李伟克,王明玉,宁吉彬,杨光. 大兴安岭雷击火时空聚集性及其驱动因素[J]. 林业科学, 2026, 62(6): 56-70.
Boyang Gao,Jiannan Xu,Weike Li,Mingyu Wang,Jibin Ning,Guang Yang. Spatiotemporal Clustering of Lightning-Ignited Forest Fires in Daxing’ anling Mountains and Itʼs Driving Factors[J]. Scientia Silvae Sinicae, 2026, 62(6): 56-70.
表1
雷击火灾驱动因素及其所属类型①"
| 类型Category | 驱动因素Driving factor |
| 地形Topography | 海拔Elevation |
| 坡度Slope* | |
| 坡向Aspect* | |
| 气象Meteorological | 累计降水量Cumulative precipitation 前3日累计降水量Three-day cumulative precipitation before a lightning-ignited fire* |
| 前3日最高气温Three-day maximum temperature before a lightning-ignited fire* 前3日平均气温Three-day mean temperature before a lightning-ignited fire* 露点温度(地表以上2 m处空气达到饱和时所需冷却到的温度)Dewpoint temperature (temperature to which the air, at two meters above the surface of the earth, would have to be cooled to reach saturation) 气温(陆地、海洋或内陆水体表面以上2 m高度的气温)Temperature (temperature of air at two meters above the surface of land, sea or in-land waters.) 月平均气温Monthly mean temperature* 月最高气温Monthly maximum temperature* | |
| 0~7 cm土层土壤湿度0–7 cm soil layer soil moisture 空气相对湿度Relative air humidity*(详见公式1~3 See formula 1–3) | |
| 10 m东向风分量Eastward component of the 10 m wind 10 m北向风分量Northward component of the 10 m wind 风向Wind direction*(详见公式4 See formula 4) 风速Wind speed*(详见公式5 See formula 5) | |
| 可燃物Fuel | 归一化植被指数Normalized difference vegetation index |
图6
2013—2024年大兴安岭雷击火灾核密度 A:雷击火核密度分布(整体) Overall kernel density distribution of lightning-ignited fires;B:雷击火核密度局部聚集区1 Local cluster area 1 of lightning-ignited fire kernel density;C:雷击火核密度局部聚集区2 Local cluster area 2 of lightning-ignited fire kernel density;D:雷击火核密度局部聚集区3 Local cluster area 3 of lightning-ignited fire kernel density"
图10
2013—2024年各驱动因子对雷击火灾核密度的解释力 Wspd:风速Wind speed;Wdir:风向Wind direction;WV:10 m北向风分量Northward component of 10 m wind;WU:10 m东向风分量Eastward component of 10 m wind;CP:累计降水量Cumulative precipitation;T:气温Temperature;TmeanPre3day:前3日平均气温Three-day mean temperature before lightning-ignited fire;TmaxPre3day:前3日最高气温Three-day maximum temperature before a lightning-ignited fire;SM:0~7 cm土层土壤湿度0–7 cm soil layer soil moisture;Slp:坡度Slope;RH:空气相对湿度Relative air humidity;CPPre3day:前3日累计降水量Three-day cumulative precipitation before lightning-ignited fire;TmeanMonth:月平均气温Monthly mean temperature;TmaxMonth:月最高气温Monthly maximum temperature;Elev:海拔Elevation;Td:露点温度Dewpoint temperature;Asp:坡向Aspect;NDVI:归一化植被指数Normalized difference vegetation index."
图11
雷击火灾核心驱动因子解释力的年际稳定性 TmeanPre3day:前3日平均气温Three-day mean temperature before a lightning-ignited fire;SM:0~7 cm土层土壤湿度0–7 cm soil layer soil moisture;TmeanMonth:月平均气温Monthly mean temperature;TmaxMonth:月最高气温Monthly maximum temperature;Elev:海拔Elevation;NDVI:归一化植被指数Normalized difference vegetation index."
图12
双驱动因子解释力年度变化热力图(部分组合) Elev × NDVI:海拔和归一化植被指数的双因子组合Two-factor combination of elevation and normalized difference vegetation index;RH × TmeanMonth:空气相对湿度和月平均气温的双因子组合Two-factor combination of relative air humidity and monthly mean temperature;SM × NDVI:0~7 cm土层土壤湿度和归一化植被指数的双因子组合Two-factor combination of 0–7 cm soil layer soil moisture and normalized difference vegetation index;SM × TmaxMonth:0~7 cm土层土壤湿度和月最高气温的双因子组合Two-factor combination of 0–7 cm soil layer soil moisture and monthly maximum temperature;T × SM:气温和0~7 cm土层土壤湿度的双因子组合Two-factor combination of temperature and 0–7 cm soil layer soil moisture;TmaxPre3day × Td:前3日最高气温和露点温度的双因子组合Two-factor combination of three-day maximum temperature before a lightning-ignited fire and dewpoint temperature;TmaxPre3day × TmaxMonth:前3日最高气温和月最高气温的双因子组合Two-factor combination of three-day maximum temperature before a lightning-ignited fire and monthly maximum temperature;TmaxPre3day × TmeanMonth:前3日最高气温和月平均气温的双因子组合Two-factor combination of three-day maximum temperature before a lightning-ignited fire and monthly mean temperature;TmaxPre3day × Wdir:前3日最高气温和风向的双因子组合Two-factor combination of three-day maximum temperature before a lightning-ignited fire and wind direction;WV × NDVI:10 m北向风分量和归一化植被指数的双因子组合Two-factor combination of northward component of 10 m wind and normalized difference vegetation index."
图13
2023年双因子交互解释力矩阵热力图 Wspd:风速Wind speed;Wdir:风向Wind direction;WV:10 m北向风分量Northward component of 10 m wind;WU:10 m东向风分量Eastward component of 10 m wind;CP:累计降水量Cumulative precipitation;T:气温Temperature;TmeanPre3day:前3日平均气温Three-day mean temperature before lightning-ignited fire;TmaxPre3day:前3日最高气温Three-day maximum temperature before a lightning-ignited fire;SM:0~7 cm土层土壤湿度0?7 cm soil layer soil moisture;Slp:坡度Slope;RH:空气相对湿度Relative air humidity;CPPre3day:前3日累计降水量Three-day cumulative precipitation before a lightning-ignited fire;TmeanMonth:月平均气温Monthly mean temperature;TmaxMonth:月最高气温Monthly maximum temperature;Elev:海拔Elevation;Td:露点温度Dewpoint temperature;Asp:坡向Aspect;NDVI:归一化植被指数Normalized difference vegetation index."
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