全球30米分辨率森林火烧迹地数据集

本章基于多时相全球30米分辨率森林火烧迹地产品、全球500m分辨率森林净初级生产力（NPP）产品、全球森林火险指数产品等，研究了2000—2018年全球林火空间分布及变化特征、林火对于森林植被生产力的影响，并以五个森林火灾多发区域为典型研究区，在历史状态与未来趋势两个层面上对森林火险进行分析与阐述。
2000年至2018年期间，全球森林火烧迹地面积在0.60亿hm²至0.97亿hm2之间，年际波动大。相对集中的分布区域主要包括非洲中部和南部、澳大利亚北部、南美洲中北部等，
其中非洲森林火烧迹地面积占全球的60%以上。火灾对森林净初级生产力产生显著影响，
在火灾发生当年，森林净初级生产力呈现明显下降，一般在随后的三至四年内逐渐得以恢
复。
全球五个森林火灾多发区域中，澳大利亚北部、欧洲南部森林火险无明显趋势变化，中国西南部、非洲中部和美国西海岸森林火险虽维持在较高状态但呈微弱下降趋势。

This study is based on multi-temporal global 30-meter resolution burned forest area products, global 500-meter resolution forest net primary productivity (NPP) products, global forest fire danger index products and other datasets. It examines the spatial distribution and variation characteristics of global forest fires, as well as the impact of forest fires on forest vegetation productivity during 2000–2018. Taking five regions with frequent global forest fires as typical study areas, this study analyzes and elaborates on forest fire danger from two dimensions: historical status and future trends.
During 2000–2018, the global burned forest area ranged from 0.60×10^8 hm² to 0.97×10^8 hm², with large interannual fluctuations. The relatively concentrated distribution areas mainly include central and southern Africa, northern Australia, central and northern South America, among which the burned forest area in Africa accounts for more than 60% of the global total. Forest fires exert a significant impact on forest NPP: in the year of fire occurrence, forest NPP shows a marked decline, and generally gradually recovers over the subsequent three to four years.
Among the five global high-frequency forest fire regions, no obvious trend changes are found in forest fire danger in northern Australia and southern Europe. Although forest fire danger remains at a relatively high level in southwestern China, central Africa and the west coast of the United States, it exhibits a slight downward trend.

搜集汇总

背景与挑战

背景概述

该数据集是一个全球范围的30米分辨率森林火烧迹地栅格数据集，覆盖2000、2005、2010、2015和2018年，用于分析森林火灾的空间分布、变化及其对植被生产力的影响。它基于多源遥感产品，包括森林火烧、净初级生产力和火灾风险指数，研究显示全球森林火灾面积在2000年至2018年间波动较大，主要集中在非洲、澳大利亚和南美洲等地，并对森林生产力有显著短期影响。数据总体精度为93.92%，适用于森林生态和火灾风险评估研究。