气候变化领域集成服务门户(CCPortal): African burned area and fire carbon emissions are strongly impacted by small fires undetected by coarse resolution satellite data

CCPortal

DOI	10.1073/pnas.2011160118
	African burned area and fire carbon emissions are strongly impacted by small fires undetected by coarse resolution satellite data
	Ramo R.; Roteta E.; Bistinas I.; van Wees D.; Bastarrika A.; Chuvieco E.; van der Werf G.R.
发表日期	2021
ISSN	00278424
卷号	118 期号:9
英文摘要	Fires are a major contributor to atmospheric budgets of greenhouse gases and aerosols, affect soils and vegetation properties, and are a key driver of land use change. Since the 1990s, global burned area (BA) estimates based on satellite observations have provided critical insights into patterns and trends of fire occurrence. However, these global BA products are based on coarse spatial-resolution sensors, which are unsuitable for detecting small fires that burn only a fraction of a satellite pixel. We estimated the relevance of those small fires by comparing a BA product generated from Sentinel-2 MSI (Multispectral Instrument) images (20-m spatial resolution) with a widely used global BA product based on Moderate Resolution Imaging Spectroradiometer (MODIS) images (500 m) focusing on sub-Saharan Africa. For the year 2016, we detected 80% more BA with Sentinel-2 images than with the MODIS product. This difference was predominately related to small fires: we observed that 2.02 Mkm2 (out of a total of 4.89 Mkm2) was burned by fires smaller than 100 ha, whereas the MODIS product only detected 0.13 million km2 BA in that fire-size class. This increase in BA subsequently resulted in increased estimates of fire emissions; we computed 31 to 101% more fire carbon emissions than current estimates based on MODIS products. We conclude that small fires are a critical driver of BA in sub-Saharan Africa and that including those small fires in emission estimates raises the contribution of biomass burning to global burdens of (greenhouse) gases and aerosols. © This open access article is distributed under Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND).
英文关键词	Africa; Carbon emissions; MODIS; Sentinel 2; Small fires
语种	英语
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/180449
作者单位	COMPLUTIG-Complutum Tecnologías de la Información Geográfica SL, Alcalá de Henares, 28801, Spain; Environmental Remote Sensing Research Group, Department of Geology, Geography and the Environment, University of Alcalá, Alcalá de Henares, 28801, Spain; Department of Mining and Metallurgical Engineering and Materials Science, School of Engineering of Vitoria-Gasteiz, University of the Basque Country, Vitoria-Gasteiz, 01006, Spain; Faculty of Science, Vrije Universiteit, Amsterdam, 1081HV, Netherlands; Atos Nederland B.V. Burg, Amstelveen, 1185MC, Netherlands
推荐引用方式 GB/T 7714	Ramo R.,Roteta E.,Bistinas I.,et al. African burned area and fire carbon emissions are strongly impacted by small fires undetected by coarse resolution satellite data[J],2021,118(9).
APA	Ramo R..,Roteta E..,Bistinas I..,van Wees D..,Bastarrika A..,...&van der Werf G.R..(2021).African burned area and fire carbon emissions are strongly impacted by small fires undetected by coarse resolution satellite data.Proceedings of the National Academy of Sciences of the United States of America,118(9).
MLA	Ramo R.,et al."African burned area and fire carbon emissions are strongly impacted by small fires undetected by coarse resolution satellite data".Proceedings of the National Academy of Sciences of the United States of America 118.9(2021).