...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International journal of remote sensing >Temporal burn scar evolution in tallgrass prairie based on field spectroscopy
【24h】

Temporal burn scar evolution in tallgrass prairie based on field spectroscopy

机译：基于现场光谱的高草草原临时烧伤疤痕演变

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

In situ field spectroscopy samples were used to simulate several Moderate Resolution Imaging Spectroradiometer (MODIS) bands and indices commonly used for burned area detection. Each band or index was tested for its ability to differentiate between burned and unburned tallgrass prairie during several time periods from spring (when burning took place) to late summer (peak biomass) with three analysis of variance tests. The normalized difference vegetation index (NDVI), global environmental monitoring index (GEMI), global environmental monitoring index - burn scar (GEMI-B), and normalized burn ratio (NBR) indices, as well as MODIS band 7 (longwave mid-infrared; LWMIR), showed virtually no promise for differentiating burned from unburned areas for more than several days after the burn. Others, including the burned area index (BAI), Mid-infrared burn index (MIRBI), and MODIS bands 3 (red), 4 (near-infrared; NIR), 5 (longwave near-infrared; LWNIR), and 6 (shortwave mid-infrared; SWMIR) were able to differentiate between burned and unburned areas well into the growing season - in some cases, even through its entire length. The performance of particular bands and indices often depended on grazing, vegetation phenology, ash/char/soil reflectance, and factors that influenced pre-burn biomass.
机译：原位光谱仪样品用于模拟几个中等分辨率成像光谱仪（MODIS）波段和通常用于燃烧区域检测的指标。通过三个方差分析，测试了每个波段或指数在从春季（发生燃烧时）到夏末（生物量峰值）的几个时间段内区分燃烧的草木草原和未燃烧的草丛草原的能力。归一化差异植被指数（NDVI），全球环境监测指数（GEMI），全球环境监测指数-烧伤疤痕（GEMI-B）和归一化燃烧率（NBR）指数以及MODIS 7波段（长波中红外） ； LWMIR）几乎没有任何希望在燃烧后几天内将燃烧与未燃烧区域区分开。其他包括燃烧面积指数（BAI），中红外燃烧指数（MIRBI）和MODIS波段3（红色），4（近红外； NIR），5（长波近红外； LWNIR）和6（短波中红外（SWMIR）能够在整个生长期很好地区分燃烧的区域和未燃烧的区域-在某些情况下，甚至在整个长度上。特定波段和指数的表现通常取决于放牧，植被物候，灰分/炭/土壤反射率以及影响预燃生物量的因素。

著录项

  • 来源
    《International journal of remote sensing》 |2013年第20期|7199-7217|共19页
  • 作者

    Rhett L. Mohler; Douglas G. Goodin;

  • 作者单位

    Department of Geography, Saginaw Valley State University, University Center, MI 48710, USA;

    Department of Geography, Kansas State University, Manhattan, KS 66506, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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