The impact of climate change on forest and grassland fires and future trends in Hulunbuir City, Inner Mongolia

ZHANG Heng, ZHANG Qiuliang, YUE Yang, SONG Ximing, DAI Haiyan, YI Bole

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2020, Vol. 44 ›› Issue (5) : 222-230.

PDF(1790 KB)
南京林业大学学报（自然科学版）
PDF(1790 KB)
JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2020, Vol. 44 ›› Issue (5) : 222-230. DOI: 10.3969/j.issn.1000-2006.201904049

The impact of climate change on forest and grassland fires and future trends in Hulunbuir City, Inner Mongolia

Author information +
History +

Abstract

【Objective】Climate warming is an important factor in the increase in number and area of forest and grassland fires. The Hulunbuir Grassland is an important ecological protection barrier in northern China, and occurs in a region significantly affected by climate change. The study of climate change and forest and grassland fires in Hulunbuir City provides a theoretical basis for the region to cope with meteorological disasters and prepare for forest and grassland fire prevention.【Method】Using R/S analysis and SPEI index analysis, meteorological data from 1961-2018 for Hulunbuir City (Inner Mongolia Autonomous Region) were analyzed to determine past and future trends and the degree of dryness and wetness. By analyzing Hulunbuir City forest and grassland fire data from 1990-2018, future fire trends were identified. The results of the analyses (meteorological factors and drought conditions) were combined with the forest and grassland fire data for Hulunbuir City. 【Result】① Between 1961 and 2018, in Hulunbuir City, the temperature and precipitation increased, whereas the relative humidity and number of sunshine hours decreased. Future temperature change trends are likely to reflect the past but trends in precipitation, relative humidity and sunshine hours are likely to be opposite to the past. Drought has continued in Hulunbuir City since 2011 and analysis of 24 of data shows that the drought is most likely to continue in the future. ② The number and burn area of forest fires showed an upward trend, 1 times/a and 318.38 hm 2/a, respectively whereas the number and burn area of grassland fires showed a downward trend, 0.41 time/a and 12 486 hm 2/a, respectively. ③ During the growing season, both forest and grassland fires are negatively correlated with temperature and precipitation. Grassland fires are positively correlated with relative humidity and sunshine hours whereas forest fires are negatively correlated with these two factors. ④ The number and burn area of forest and grassland fires shows a high degree of fit with the segment time scale SPEI, and the fitted curve was a quadratic function. 【Conclusion】This study predicts that the degree of drought in Hulunbuir will continue in the future. The occurrence of forest and grassland fires has a high fit with meteorological factors. It is suggested that the local authorities concerned formulate reasonable protective measures on the basis of understanding local climate change.

Key words

climate change / forest grassland fires / R/S analysis / standardized precipitation evapotranspiration index (SPEI) / future trend / Hulunbuir / Inner Mongolia

Cite this article

EndNote

Ris (Procite)

Bibtex

Download Citations
ZHANG Heng , ZHANG Qiuliang , YUE Yang , et al . The impact of climate change on forest and grassland fires and future trends in Hulunbuir City, Inner Mongolia[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY. 2020, 44(5): 222-230 https://doi.org/10.3969/j.issn.1000-2006.201904049

References

List( Publishing order | Descend order by publishing year | Descend order by cited within ) Chart analysis
[1]
李兴华, 武文杰, 张存厚 , 等. 气候变化对内蒙古东北部森林草原火灾的影响[J]. 干旱区资源与环境, 2011,25(11):114-119.
LI X H, WU W J, ZHANG C H , et al. Influence of climate change on north-eastern of Inner Mongolia grassland forest fire[J]. J Arid Land Resour Environ, 2011,25(11):114-119. DOI: 10.13448/j.cnki.jalre.2011.11.011.
Cited in this article [1]
[2]
李兴华, 任丽媛, 刘秀荣 . 气候变化对内蒙古草原火灾的影响[J]. 干旱区资源与环境, 2014,28(4):129-133.
LI X H, REN L Y, LIU X R . Impact of climate change on the grassland fires in Inner Mongolia[J]. J Arid Land Resour Environ, 2014,28(4):129-133. DOI: 10.13448/j.cnki.jalre.2014.04.013.
Cited in this article [1]
[3]
HEPTING G H . Climate and forest diseases[J]. Annual Review of Phytopathology, 1963,1(1):31-50. DOI: 10.1146/annurev.py.01.090163.000335.
https://doi.org/10.1146/annurev.py.01.090163.000335
http://www.annualreviews.org/doi/10.1146/annurev.py.01.090163.000335
Cited in this article [1]
[4]
CLARK J S . Effect of climate change on fire regimes in Northwestern Minnesota[J]. Nature, 1988,334(6179):233-235. DOI: 10.1038/334233a0.
https://doi.org/10.1038/334233a0
https://doi.org/10.1038/334233a0
Cited in this article [1]
[5]
CLARK J S . Fire and climate change during the last 750 yr in Northwestern Minnesota[J]. Ecological Monographs, 1990,60(2):135-159. DOI: 10.2307/1943042.
https://doi.org/10.2307/1943042
http://doi.wiley.com/10.2307/1943042
Cited in this article [1]
[6]
CARCAILLET C, BERGERON Y, RICHARD P J H , et al. Change of fire frequency in the Eastern Canadian boreal forests during the Holocene: does vegetation composition or climate trigger the fire regime?[J]. Journal of Ecology, 2001,89(6):930-946. DOI: 10.1111/j.1365-2745.2001.00614.x.
https://doi.org/10.1111/j.1365-2745.2001.00614.x
http://doi.wiley.com/10.1111/j.1365-2745.2001.00614.x
Cited in this article [1]
[7]
CARCAILLET C, RICHARD P J H . Holocene changes in seasonal precipitation highlighted by fire incidence ineastern Canada[J]. Clim Dyn, 2000,16(7):549-559. DOI: 10.1007/s003820000062.
https://doi.org/10.1007/s003820000062
http://link.springer.com/10.1007/s003820000062
Cited in this article [1]
[8]
孙凤华, 杨素英, 陈鹏狮 . 东北地区近44年的气候暖干化趋势分析及可能影响[J]. 生态学杂志, 2005,24(7):751-755, 762.
SUN F H, YANG S Y, CHEN P S . Climatic warming-drying trend in Northeastern China during the last 44 years and its effects[J]. Chin J Ecol, 2005,24(7):751-755, 762. DOI: 10.13292/j.1000-4890.2005.0035.
Cited in this article [1]
[9]
孙龙, 王千雪, 魏书精 , 等. 气候变化背景下我国森林火灾灾害的响应特征及展望[J]. 灾害学, 2014,29(1):12-17.
SUN L, WANG Q X, WEI S J , et al. Response characteristics and prospect of forest fire disasters in the context of climate change in China[J]. J Catastrophology, 2014,29(1):12-17. DOI: 10.3969/j.issn.1000-811X.2014.01.003.
Cited in this article [1]
[10]
宫大鹏, 康峰峰, 刘晓东 . 新巴尔虎草原火时空分布特征及对气象因子响应[J]. 北京林业大学学报, 2018,40(2):82-89.
GONG D P, KANG F F, LIU X D . Spatial and temporal distribution patterns of grassland fire and its response to meteorological factors in Xin Barag Prairie of northwestern China[J]. J Beijing For Univ, 2018,40(2):82-89. DOI: 10.13332/j.1000-1522.20170402.
Cited in this article [2]
[11]
贾子金, 胡艳宇, 霍光伟 , 等. 呼伦贝尔典型草原主要气象因子变化与群落多样性特征研究[J]. 安徽农业科学, 2015,43(13):235-237.
JIA Z J, HU Y Y, HUO G W , et al. Analysis of the change of main meteorological factors and community diversity characteristics of typical steppe in Hulun Buir[J]. J Anhui Agric Sci, 2015,43(13):235-237. DOI: 10.3969/j.issn.0517-6611.2015.13.081.
Cited in this article [1]
[12]
宋来萍, 刘礴霏, 王玉华 , 等. 呼伦贝尔沙地不同树龄樟子松对气候的响应[J]. 南京林业大学学报(自然科学版), 2020,44(2):159-164.
SONG L P, LIU B F, WANG Y H , et al. Age-dependent-tree-ring growth responses of Pinus sylvestris var. mongolica to climate in Hulunbuir sandy land[J]. J Nanjing For Univ(Nat Sci Ed), 2020,44(2):159-164. DOI: 10.3969/j.issn.1000-2006.201806001.
Cited in this article [1]
[13]
萨如拉, 周庆, 刘鑫晔 , 等. 1980—2015年内蒙古森林火灾的时空动态[J]. 南京林业大学学报(自然科学版), 2019,43(2):137-143.
SA R L, ZHOU Q, LIU X Y , et al. Studies on the spatial and temporal dynamics of forest fires in Inner Mongolia from 1980 to 2015[J]. J Nanjing For Univ(Nat Sci Ed), 2019,43(2):137-143. DOI: 10.3969/j.issn.1000-2006.201806037.
Cited in this article [1]
[14]
米勇 . 血汗筑起的绿色丰碑: 呼伦贝尔市森林草原防火工作成功经验[J]. 内蒙古林业, 2008(5):37.
http://d.wanfangdata.com.cn/Periodical_nmgly200805033.aspx
Abstract
呼伦贝尔市位于内蒙古自治区东北部,总面积25.3万平方公里,与俄罗斯、蒙古国接壤,边境线长1723.82公里;有林地面积1267万公顷,占全市总土地面积的50%,占自治区有林地面积的86%;森林覆盖率49%.
MI Y . Green monument built by sweat and blood: successful experience of fire prevention in Hulunbuir forest and grassland[J]. Inner Mongolia Forestry, 2008(5):37. DOI: 10.3969/j.issn.1033-8221.2008.05.033.
Cited in this article [1]
[15]
宋卫士 . 气象灾害对呼伦贝尔草原生态环境的影响[J]. 现代农业, 2018(4):111-112.
SONG W S . The impact of meteorological disasters on the ecological environment of Hulunbuir Grassland[J]. Mod Agric, 2018(4):111-112. DOI: 10.3969/j.issn.1008-0708.2018.04.089.
Cited in this article [2]
[16]
王旭 . 呼伦贝尔市林区农业现代化发展研究[D]. 呼和浩特: 内蒙古农业大学, 2016.
WANG X . Development of agriculture modernization in Hulun Buir forest region[D]. Huhhot: Inner Mongolia Agricultural University, 2016.
Cited in this article [1]
[17]
石瑞平 . 基于一元回归分析模型的研究[D]. 石家庄: 河北科技大学, 2009.
SHI R P . The study based on unitary regression analysis model[D]. Shijiazhuang: Hebei University of Science and Technology, 2009.
Cited in this article [1]
[18]
张正祥, 张洪岩, 李冬雪 , 等. 呼伦贝尔草原人为火空间分布格局[J]. 生态学报, 2013,33(7):2023-2031.
https://doi.org/10.5846/stxb201112271992
http://www.ecologica.cn/stxb/ch/reader/view_abstract.aspx?file_no=stxb201112271992&flag=1
Abstract
人为草原火及其影响因素的空间分布格局与相关关系研究对于草原火发生、草原火管理等研究具有重要的意义。应用Ripley's K函数对呼伦贝尔草原1976-1996年间发生的人为草原火进行了空间统计分析,确定人为草原火空间分布在年内主要发生月份和年际间均呈聚集分布;应用Kernel密度函数对人为草原火及其影响因素居民点、道路和农田的空间分布密度进行了研究,结果表明呼伦贝尔草原人为火分布广泛,热点区域主体在123.05-124.82°E、48.25-50.21°N之间;居民点、农田空间分布密度的热点区域主要分布在东部和中部地区,道路的分布密度较农田和居民点分布更加均匀。人为草原火空间分布密度与居民点、道路和农田的空间分布密度呈显著性正相关,其Pearson相关系数依次为0.448、0.236、0.602 (P<0.001),火源因素(居民点、道路、农田)的空间分布格局是呼伦贝尔草原人为火空间分布格局的主要影响因素。
ZHANG Z X, ZHANG H Y, LI D X , et al. Spatial distribution pattern of human-caused fires in Hulunbeir grassland[J]. Acta Ecol Sin, 2013,33(7):2023-2031. DOI: 10.5846/stxb201112271992.
Cited in this article [2]
[19]
宫大鹏, 李炳怡, 刘晓东 . 草原火烧严重度燃烧指数的适用性比较分析[J]. 生态学报, 2018,38(7):2434-2441.
https://doi.org/10.5846/stxb201703290545
http://www.ecologica.cn/stxb/ch/reader/view_abstract.aspx?file_no=stxb201703290545&flag=1
Abstract
基于遥感影像的燃烧指数被广泛应用于火烧严重度（fire severity）研究，选取适宜燃烧指数定量评估草原火烧严重度，对草原生态系统植被的恢复与管理具有重要意义。以呼伦贝尔草原火烧迹地为研究区域，基于landsat8 OLI影像分别构建4种燃烧指数（NBR、NSTV1、dNBR和RdNBR）与综合燃烧指数（CBI）的回归模型并进行精度验证，对比分析不同燃烧指数识别草原火烧严重度等级的能力。结果表明：在燃烧指数与CBI构建的回归模型中，dNBR指数的相关性（n=70，R2=0.856）最高；4种燃烧指数识别火烧严重度的精度存在差异，中度火烧区域（1 < CBI ≤ 2）内，NSTV1指数识别精度最高，未过火（CBI=0）、轻度火烧（0 < CBI ≤ 1）和重度火烧（2 < CBI ≤ 3）区域内，dNBR指数识别精度均表现最好，分别为80%、62.5%和100%；基于不同燃烧指数的草原火烧严重度制图中，dNBR指数的总体精度同样高于其他燃烧指数，为82.1%，Kappa系数高达0.76。综上所述，dNBR指数是草原火烧严重度分析与评价的适宜遥感指数。
GONG D P, LI B Y, LIU X D . Comparative analysis of burn index adaptability when evaluating grassland fire severity[J]. Acta Ecol Sin, 2018,38(7):2434-2441. DOI: 10.5846/stxb201703290545.
Cited in this article [3]
[20]
陈艳梅, 高吉喜, 冯朝阳 , 等. 1982—2010年呼伦贝尔植被净初级生产力时空格局[J]. 生态与农村环境学报, 2012,28(6):647-653.
CHEN Y M, GAO J X, FENG C Y , et al. Temporal and spatial distribution of vegetation net primary productivity (NPP) in the years from 1982 to 2010 in Hulunbeier[J]. J Ecol Rural Environ, 2012,28(6):647-653. DOI: 10.3969/j.issn.1673-4831.2012.06.007.
Cited in this article [1]
[21]
赵嘉阳 . 龙岩市1960—2013年气候变化特征及未来趋势分析[J]. 福建农林大学学报(自然科学版), 2017,46(1):95-102.
ZHAO J Y . Changes in temperature and precipitation of Longyan City during 1960-2013 and future prediction[J]. Journal of Fujian Agriculture and Forestry University(Natural Science Edition), 2017,46(1):95-102. DOI: 10.13323/j.cnki.j.fafu(nat.sci.).2017.01.015
Cited in this article [4]
[22]
章磊 . 南昌市土地利用变化对碳排放影响研究[D]. 南昌: 江西农业大学, 2017.
ZHANG L . The research on carbon emission effects of land use change in NanChang[D]. Nanchang: Jiangxi Agricultural University, 2017.
Cited in this article [1]
[23]
潘雅婧, 王仰麟, 彭建 , 等. 基于小波与R/S方法的汉江中下游流域降水量时间序列分析[J]. 地理研究, 2012,31(5):811-820.
PAN Y J, WANG Y L, PENG J , et al. Precipitation change in middle and lower reaches of Hanjiang River: Based on wavelet analysis and R/S analysis[J]. Geogr Res, 2012,31(5):811-820.
Cited in this article [8]
[24]
张涵丹, 卫伟, 薛萐 . 基于R/S分析和Mann-Kendall检验的定西市气温降水变化特征[J]. 水土保持研究, 2015,22(6):183-189.
ZHANG H D, WEI W, XUE S . Analysis on the variation of temperature and precipitation in Dingxi based on R/S and Mann-Kendall test[J]. Res Soil Water Conserv, 2015,22(6):183-189. DOI: 10.13869/j.cnki.rswc.2015.06.025.
Cited in this article [2]
[25]
周丹, 张勃, 罗静 , 等. 基于SPEI的华北地区近50年干旱发生强度的特征及成因分析[J]. 自然灾害学报, 2014,23(4):192-202.
ZHOU D, ZHANG B, LUO J , et al. SPEI-based intensity characteristics and cause analysis of drought in North China during recent 50 years[J]. J Nat Disasters, 2014,23(4):192-202. DOI: 10.13577/j.jnd.2014.0425.
Cited in this article [2]
[26]
苏宏新, 李广起 . 基于SPEI的北京低频干旱与气候指数关系[J]. 生态学报, 2012,32(17):5467-5475.
https://doi.org/10.5846/stxb201111071684
http://www.ecologica.cn/stxb/ch/reader/view_abstract.aspx?file_no=stxb201111071684&flag=1
Abstract
干旱是北京地区发生最频繁、波及面积最大、持续时间最长的一种自然灾害。基于1868—2010 年每月的降水和平均气温数据，应用综合了降水和气温变化共同效应的新的干旱指标标准化降水蒸散指数（SPEI）定量描述北京地区的干湿状况，并利用历史旱灾记录对其进行验证；采用连续小波转换(CWT)分析近150 a来的干旱振荡特征，并利用交叉小波变换(XWT)探论了干旱与大尺度气候因子之间的关系。结果表明：1）SPEI揭示的干旱与历史记录比较吻合，证明该指数可以在多时间尺度上有效地反映北京地区旱涝程度及其持续时间；2）北京地区干旱具有80—120个月年际尺度和250个月、480个月年代际尺度的周期振荡，呈现了同大尺度气候因子相似的变化特征；3）北京干旱变化与四大气候因子存在着多时间尺度的显著相关性，SPEI和北大西洋涛动（NAO）、北极涛动(AO)、太平洋涛动（PDO）都具有100—120个月和250个月的年代际主共振周期，而SPEI和厄尔尼诺-南方涛动（ENSO）在整个研究期内都表现出极显著的32—64个月年际主共振周期，同时SPEI与4个气候因子在共振周期上均体现出比较明确的时滞特征（2—6月不等）。因此，可以基于大尺度气象因子结合SPEI预测北京地区未来的干旱变化。
SU H X, LI G Q . Low-frequency drought variability based on SPEI in association with climate indices in Beijing[J]. Acta Ecol Sin, 2012,32(17):5467-5475. DOI: 10.5846/stxb201111071684.
Cited in this article [1]
[27]
李伟光, 侯美亭, 陈汇林 , 等. 基于标准化降水蒸散指数的华南干旱趋势研究[J]. 自然灾害学报, 2012,21(4):84-90.
LI W G, HOU M T, CHEN H L , et al. Study on drought trend in South China based on standardized precipitation evapotranspiration index[J]. J Nat Disasters, 2012,21(4):84-90. DOI: 10.13577/j.jnd.2012.0413.
Cited in this article [1]
[28]
刘珂, 姜大膀 . 基于两种潜在蒸散发算法的SPEI对中国干湿变化的分析[J]. 大气科学, 2015,39(1):23-36.
LIU K, JIANG D B . Analysis of dryness/wetness over China using standardized precipitation evapotranspiration index based on two evapotranspiration algorithms[J]. Chin J Atmos Sci, 2015,39(1):23-36. DOI: 10.3878/j.issn.1006-9895.1402.13265.
Cited in this article [1]
[29]
VICENTE-SERRANO S M, BEGUERÍA S, LÓPEZ-MORENO J I . A multiscalar drought index sensitive to global warming: the standardized precipitation evapotranspiration index[J]. Journal of Climate, 2010,23(7):1696-1718. DOI: 10.1175/2009jcli2909.1.
Cited in this article [8]
[30]
高蓓, 姜彤, 苏布达 , 等. 基于SPEI的1961—2012年东北地区干旱演变特征分析[J]. 中国农业气象, 2014,35(6):656-662.
GAO B, JIANG T, SU B D , et al. Evolution analysis on droughts in northeast China during 1961-2012 based on SPEI[J]. Chin J Agrometeorology, 2014,35(6):656-662. DOI: 10.3969/j.issn.1000-6362.2014.06.008.
Cited in this article [1]
[31]
邱赠东, 张治洋, 吴荣娟 . 闽西寒潮的气候特征及农业灵害防御[J]. 闽西职业技术学院学报, 2007,9(2):12-14.
QIU Z D, ZHANG Z Y, WU R J . Climate characteristic of the west of Fujian Province’s cold surge and defense of agricultural disater[J]. J Minxi Vocat Tech Coll, 2007,9(2):12-14. DOI: 10.3969/j.issn.1673-4823.2007.02.005.
Cited in this article [1]
[32]
赵兴凯, 李增尧, 朱清科 . 基于SPI和SPEI陕北黄土区土壤水分对气候特征的响应[J]. 农业机械学报, 2016,47(8):155-163.
ZHAO X K, LI Z Y, ZHU Q K . Response of soil moisture on climate characteristics based on SPI and SPEI in loess region of northern Shaanxi[J]. Trans Chin Soc Agric Mach, 2016,47(8):155-163. DOI: 10.6041/j.issn.1000-1298.2016.08.020.
Cited in this article [1]
[33]
迟道才, 沙炎, 陈涛涛 , 等. 基于标准化降水蒸散指数的干旱敏感性分析:以呼伦贝尔市为例[J]. 沈阳农业大学学报, 2018,49(4) : 433-439.
CHI D C, SHA Y, CHEN T T , et al. Analysis of drought sensitivity based on standardized precipitation evapotranspiration index: taking Hulunbeier as an example[J] . J Shenyang Agric Univ, 2018,49(4) : 433-439. DOI: 10.3969/j.issn.1000-1700.2018.04.007.
Cited in this article [1]
[34]
李明, 胡炜霞, 张莲芝 , 等. 基于SPEI的东北地区气象干旱风险分析[J]. 干旱区资源与环境, 2018,32(7):134-139.
LI M, HU W X, ZHANG L Z , et al. Risk analysis of meteorological drought in Northeast China based on standardized precipitation evapotranspiration index[J]. J Arid Land Resour Environ, 2018,32(7):134-139. DOI: 10.13448/j.cnki.jalre.2018.217.
Cited in this article [1]
[35]
舒展 . 气候变化对大兴安岭塔河林业局森林火灾的影响研究[D]. 哈尔滨:东北林业大学, 2011.
SHU Z . Impacts research of climate change on forest fires in Ta He forestry bureau in Great Xing’an Mountain region[D]. Harbin: Northeast Forestry University, 2011.
Cited in this article [1]
[36]
王云变 . 气象与火灾[J]. 陕西气象, 2004(4):49-50.
WANG Y B . Meteorology and fire[J]. J Shaanxi Meteorol, 2004(4):49-50. DOI: 10.3969/j.issn.1006-4354.2004.04.021.
Cited in this article [1]
[37]
刘德义, 黄鹤, 杨艳娟 , 等. 天津城市化对市区气候环境的影响[J]. 生态环境学报, 2010,19(3):610-614.
LIU D Y, HUANG H, YANG Y J , et al. The climate impact of urbanization in Tianjin City[J]. Ecol Environ Sci, 2010,19(3):610-614. DOI: 10.3969/j.issn.1674-5906.2010.03.021.
Cited in this article [1]
[38]
田晓瑞, 赵凤君, 舒立福 , 等. 1961—2010年中国植被区的气候与林火动态变化[J]. 应用生态学报, 2014,25(11):3279-3286.
TIAN X R, ZHAO F J, SHU L F , et al. Changes of climate and fire dynamic in China vegetation zone during 1961:2010[J]. Chin J Appl Ecol, 2014,25(11):3279-3286. DOI: 10.13287/j.1001-9332.20140918.015.
Cited in this article [1]
[39]
赵凤君 . 气候变化对内蒙古大兴安岭林区森林火灾的影响研究[D]. 北京:中国林业科学研究院, 2007.
ZHAO F J . Study on the impacts of climate change on forest fires in Inner Mongolia Daxing’anling forest region[D]. Beijing: Chinese Academy of Forestry, 2007.
Cited in this article [1]
[40]
WESTERLING A L . Warming and earlier spring increase Western US forest wildfire activity[J]. Science, 2006,313(5789):940-943. DOI: 10.1126/science.1128834.
https://doi.org/10.1126/science.1128834
https://www.ncbi.nlm.nih.gov/pubmed/16825536
https://www.ncbi.nlm.nih.gov/pubmed/16825536
Cited in this article [1] Abstract
Western United States forest wildfire activity is widely thought to have increased in recent decades, yet neither the extent of recent changes nor the degree to which climate may be driving regional changes in wildfire has been systematically documented. Much of the public and scientific discussion of changes in western United States wildfire has focused instead on the effects of 19th- and 20th-century land-use history. We compiled a comprehensive database of large wildfires in western United States forests since 1970 and compared it with hydroclimatic and land-surface data. Here, we show that large wildfire activity increased suddenly and markedly in the mid-1980s, with higher large-wildfire frequency, longer wildfire durations, and longer wildfire seasons. The greatest increases occurred in mid-elevation, Northern Rockies forests, where land-use histories have relatively little effect on fire risks and are strongly associated with increased spring and summer temperatures and an earlier spring snowmelt.
[41]
田晓瑞, 舒立福 . 我国境外火的火环境分析[J]. 森林防火, 2005(3):24-26.
TIAN X R, SHU L F . Analyses on the fire environment of external forest fires happening along the boundaries of China[J]. For Fire Prev, 2005(3):24-26. DOI: 10.3969/j.issn.1002-2511.2005.03.009.
Cited in this article [1]
[42]
毕忠镇 . 努力减少境外火对东北内蒙古林区的危害[J]. 森林防火, 1996(4):5-7.
BI Z Z . Efforts to reduce the harm of overseas fire to Northeast Inner Mongolia forest region[J]. For Fire Prev, 1996(4):5-7.
Cited in this article [1]

RIGHTS & PERMISSIONS

Copyright reserved © 2020.
PDF(1790 KB)

Accesses

Citation

Detail
Sections
Recommended
The full text is translated into English by AI, aiming to facilitate reading and comprehension. The core content is subject to the explanation in Chinese.

Author

Reader

Reviewer

www.nldxb.njfu.edu.cn

Edited ＆ Published by Editorial Department of Nanjing Forestry University(Natural Sciences Edition)
Address： No.159 Longpan Road,Nanjing 210037 Jiangsu,P.R.China
E-mail ：xuebao@njfu.edu.cn , xuebao@njfu.com.cn
Telephone +86-25-85428247,85427076
Distributed by China International Book Trading Corporation P.O. Box 399, Beijing ,P.R. China

/

〈 〉