...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >Analysis of daily, monthly, and annual burned area using the fourth-generation global fire emissions database (GFED4)
【24h】

Analysis of daily, monthly, and annual burned area using the fourth-generation global fire emissions database (GFED4)

机译：使用第四代全球火灾排放数据库（GFED4）分析每日，每月和每年的燃烧面积

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We describe the fourth generation of the Global Fire Emissions Database (GFED4) burned area data set, which provides global monthly burned area at 0.25° spatial resolution from mid-1995 through the present and daily burned area for the time series extending back to August 2000. We produced the full data set by combining 500 m MODIS burned area maps with active fire data from the Tropical Rainfall Measuring Mission (TRMM) Visible and Infrared Scanner (VIRS) and the Along-Track Scanning Radiometer (ATSR) family of sensors. We found that the global annual area burned for the years 1997 through 2011 varied from 301 to 377Mha, with an average of 348Mha. We assessed the interannual variability and trends in burned area on the basis of a region-specific definition of fire years. With respect to trends, we found a gradual decrease of 1.7Mhayr ~(- 1) (- 1.4%yr ~(- 1)) in Northern Hemisphere Africa since 2000, a gradual increase of 2.3Mhayr - 1 (+1.8%yr - 1) in Southern Hemisphere Africa also since 2000, a slight increase of 0.2Mhayr ~(- 1) (+2.5%yr ~(- 1)) in Southeast Asia since 1997, and a rapid decrease of approximately 5.5Mhayr ~(- 1) (- 10.7%yr ~(- 1)) from 2001 through 2011 in Australia, followed by a major upsurge in 2011 that exceeded the annual area burned in at least the previous 14 years. The net trend in global burned area from 2000 to 2012 was a modest decrease of 4.3Mhayr~(- 1) (- 1.2%yr~(- 1)). We also performed a spectral analysis of the daily burned area time series and found no vestiges of the 16 day MODIS repeat cycle. Key pointsThe area of the land surface burned annually has been decreasing since 2000.This trend is in part due to a decline in burning in Northern-Hemisphere Africa.The area burned in some regions has been increasing, however.
机译：我们描述了第四代全球火灾排放数据库（GFED4）燃烧面积数据集，该数据集提供了从1995年中期到现在和每日燃烧面积的0.25°空间分辨率的全球每月燃烧面积，其时间序列可以追溯到2000年8月。 。我们将500 m MODIS燃烧区域图与热带雨量测量任务（TRMM）可见和红外扫描仪（VIRS）和沿轨扫描辐射计（ATSR）系列传感器的主动火数据相结合，产生了完整的数据集。我们发现，从1997年到2011年，全球年度燃烧面积从301兆赫兹到377兆赫兹不等，平均为348兆赫兹。我们根据特定年份的火灾年份评估了燃烧面积的年际变化和趋势。就趋势而言，我们发现自2000年以来，北半球非洲的1.7Mhayr〜（-1）（-1.4％yr〜（-1））逐渐下降，而2.3Mhayr-1（+ 1.8％yr- 1）同样在2000年以来的非洲南半球，自1997年以来东南亚的0.2Mhayr〜（-1）（+ 2.5％yr〜（-1））略有增加，并迅速减少了约5.5Mhayr〜（-1 ）（2001年至2011年澳大利亚的（-10.7％yr〜（-1）），随后在2011年出现了大幅增长，超过了至少过去14年的年燃烧面积。从2000年到2012年，全球燃烧面积的净趋势是温和下降4.3Mhayr〜（-1）（-1.2％yr〜（-1））。我们还对每日燃烧面积时间序列进行了频谱分析，未发现16天MODIS重复周期的痕迹。要点自2000年以来，每年地面燃烧的面积一直在减少，这种趋势部分是由于北半球非洲的燃烧减少，但某些地区的燃烧面积却在增加。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号