SAFARI 2000 PRE- AND POST-FIRE REFLECTANCE NEAR KAOMA, ZAMBIA, DRY SEASON 2000

The main goal of this study was to analyze the possibility of estimating combustion completeness based on fire-induced spectral reflectance changes of surface features by the development of relationships between combustion completeness and pre-fire to post-fire spectral reflectance changes, in the green, red, and near-infrared spectral domains (equivalent to Landsat ETM+ channels 2, 3, and 4). Experimental burns were carried out in the Western Province of Zambia in dambos (hydromorphic grasslands) and miombo woodlands during the SAFARI 2000 Third Intensive Field Campaign in August and September of 2000.This data set contains three sets of measurements: reflectance measurements from a FieldSpec UV/VNIR Spectroradiometer along burned and unburned woodland transects, in pre- and post-fire woodland and dambo plots, and for pure spectra of soil, vegetation, and charcoal; reflectance and transmittance measurements of both upper and lower leaf faces for three tree species (Julbernardia globiflora, Isoberlinia angolensis, and Brachystegia spiciformis) using an External Integrating Sphere connected to the FieldSpec Spectroradiometer; and calculations that integrate pre- and post-fire biomass measurements with pre- and post-fire reflectance in ETM+ channel 2, 3, and 4 wavelengths to estimate combustion completeness. The data files are stored as Excel spreadsheets (.csv format). Additional information about the data format, study area, instrumentation, and results is found in the companion file: ftp://daac.ornl.gov/data/safari2k/remote_sensing/pre_post_fire_refl/comp/pre_post_fire_refl_readme.pdf.

本研究的核心目标是，通过建立燃烧完全度与火灾前后地表在绿光、红光及近红外光谱域（对应陆地卫星ETM+（Landsat ETM+）的第2、3、4波段）的光谱反射率变化之间的关联关系，分析基于火灾诱导的地表特征光谱反射率变化估算燃烧完全度的可行性。实验于2000年8月至9月开展的SAFARI 2000第三次密集野外考察期间，在赞比亚西部省的达姆博湿地草原（dambos，hydromorphic grasslands）与密ombo林地（miombo woodlands）中开展了受控火烧实验。

本数据集包含三类测量与计算成果：其一为FieldSpec紫外-可见近红外光谱辐射计（FieldSpec UV/VNIR Spectroradiometer）的反射率测量数据，涵盖火灾前后林地与达姆博样地、过火与未过火林地样线的光谱反射率，以及土壤、植被与木炭的纯光谱数据；其二为借助连接至FieldSpec光谱辐射计的外置积分球（External Integrating Sphere），针对朱耳巴达木（Julbernardia globiflora）、安哥拉异翅豆（Isoberlinia angolensis）和穗花短瓣苏木（Brachystegia spiciformis）三种树种的上下叶表皮开展的反射率与透射率测量数据；其三为将火灾前后生物量测量数据与陆地卫星ETM+第2、3、4波段波长处的火灾前后反射率数据相整合，以估算燃烧完全度的计算结果。所有数据文件均以Excel电子表格（.csv格式）存储。有关数据格式、研究区域、仪器设备与研究结果的详细信息，请参阅配套文件：ftp://daac.ornl.gov/data/safari2k/remote_sensing/pre_post_fire_refl/comp/pre_post_fire_refl_readme.pdf。