Global Fire Emissions Database, Version 2.1

This data set consists of 1 degree x 1 degree gridded monthly burned area, fuel loads, combustion completeness, and fire emissions of carbon (C), carbon dioxide (CO2), carbon monoxide (CO), methane (CH4), non-methane hydrocarbons (NMHC), molecular hydrogen (H2), nitrogen oxides (NOx), nitrous oxide (N2O), particulate matter (PM2.5), total particulate matter (TPM), total carbon (TC), organic carbon (OC), and black carbon (BC) for the time period January 1997 through December 2005. Emission estimates for the 2001-2005 period are also available with an 8-day time step. The data set was compiled using satellite data and the Carnegie-Ames-Stanford Approach (CASA) biogeochemical model. Burned area from 2001-2004 was derived from active fire and 500-m burned area data from MODIS (Giglio et al., 2006). ATSR (Along Track Scanning Radiometer) and VIRS (Visible and Infrared Scanner) satellite data were used to extend the burned area time series back to 1997 (Arino et al., 1999; Giglio et al., 2003; Van der Werf et al., 2004). Fuel loads and net flux from terrestrial ecosystems were estimated as the balance between net primary production, heterotrophic respiration, and biomass burning, using time varying inputs of precipitation, temperature, solar radiation, and satellite-derived fractional absorbed photosynthetically active radiation. Tropical and boreal peatland emissions were also considered, using a global wetland cover map (Matthews and Fung, 1987) to modify surface and belowground fuel availability. The data set also includes monthly estimates of the C4 fraction of carbon emissions that can be used to construct the 13C isotope ratio (Randerson et al., 2005).The data files are in space delimited ASCII format. For each subject (e.g., burned area, fuel loads, combustion completeness, or individual fire emission species), all monthly files for the 9-year period are combined in one zipped file. Similarly, the emission estimates with an 8-day time step for the 2001-2005 period are combined in one zipped file by subject.Additional information about the methodology, data format, and parameters measured is found in the companion file: ftp://daac.ornl.gov/data/global_vegetation/fire_emission_v2/comp/global_fire_emissions_v2_1_readme.pdf. Version 2.1 Note: This data set is intended for use for large-scale modeling studies. It supersedes and replaces the Global Fire Emissions Database, Version 2 (GFEDv2) which was archived by the Oak Ridge National Laboratory Distributed Active Archive Center in 2006.

本数据集包含自1997年1月至2005年12月期间，以1度x1度网格划分的月度燃烧面积、燃料负荷、燃烧充分性和碳（C）、二氧化碳（CO2）、一氧化碳（CO）、甲烷（CH4）、非甲烷烃类（NMHC）、分子氢（H2）、氮氧化物（NOx）、氧化亚氮（N2O）、颗粒物（PM2.5）、总颗粒物（TPM）、总碳（TC）、有机碳（OC）和炭黑（BC）的火排放数据。2001-2005年期间的排放估算具有8天的时效步长。数据集的编制采用了卫星数据和卡内基-阿姆斯特朗-斯坦福方法（CASA）生物地球化学模型。2001-2004年的燃烧面积数据来源于MODIS的主动火灾和500米燃烧面积数据（Giglio等人，2006年）。为了将燃烧面积时间序列追溯至1997年，使用了ATSR（沿轨扫描辐射计）和VIRS（可见光和红外扫描仪）卫星数据（Arino等人，1999年；Giglio等人，2003年；Van der Werf等人，2004年）。陆地生态系统的燃料负荷和净通量通过净初级生产、异养呼吸和生物量燃烧之间的平衡来估算，并使用降水、温度、太阳辐射和卫星衍生的光合有效辐射分数的时间变化输入。同时考虑了热带和北方泥炭地排放，利用全球湿地覆盖图（Matthews和Fung，1987年）来调整地表和地下燃料的可利用性。数据集还包括每月碳排放C4分数的估算，可用于构建13C同位素比（Randerson等人，2005年）。数据文件采用空格分隔的ASCII格式。对于每个主题（例如，燃烧面积、燃料负荷、燃烧充分性或单个火灾排放物种），9年期间的每月文件合并为一个压缩文件。类似地，2001-2005年期间的8天时效步长的排放估算也按主题合并为一个压缩文件。关于方法、数据格式和测量参数的附加信息可在附带的文件中找到：ftp://daac.ornl.gov/data/global_vegetation/fire_emission_v2/comp/global_fire_emissions_v2_1_readme.pdf。版本2.1注意：本数据集旨在用于大规模建模研究，它取代并替代了由橡树岭国家实验室分布式主动存档中心于2006年存档的全球火排放数据库版本2（GFEDv2）。