SAFARI 2000 AOT AND COLUMN WATER VAPOR, KALAHARI TRANSECT, WET SEASON 2000

The data presented here include the aerosol optical thickness (AOT) and column water vapor measurements taken at sites along the Kalahari Transect using a Microtops sunphotometer. Data were collected every 30 minutes at 4 sites that were visited during the SAFARI 2000 Kalahari Wet Season Campaign between March 3, 2000 and March 18, 2000. AOT values are provided at 340, 440, 675, 870, and 936 nm wavelengths. An estimate of the Angstrom Coefficient is also provided to allow the estimation of AOT at other wavelengths.The purpose of this data collection was primarily for documentation of the conditions at each site and to aid in the correction of remote sensing data, for validation of Earth Observation System (EOS) products such as MODIS and MISR aerosol products, and for modeling of canopy productivity.

本数据集包含沿卡拉哈里样带（Kalahari Transect）站点采用Microtops太阳光度计获取的气溶胶光学厚度（aerosol optical thickness, AOT）与柱总水汽测量数据。数据采集频率为每30分钟1次，共覆盖4个观测站点，相关数据采集于2000年3月3日至3月18日期间开展的SAFARI 2000卡拉哈里湿季科考行动中。气溶胶光学厚度数据提供了340、440、675、870及936纳米波段的观测值。数据集同时提供埃斯特朗系数（Angstrom Coefficient）估算值，可用于推导其他波段下的气溶胶光学厚度。本次数据采集的主要目的为记录各观测站点的大气环境条件，辅助遥感数据校正工作，验证地球观测系统（Earth Observation System, EOS）旗下MODIS与MISR气溶胶产品等遥感产品的精度，同时可为冠层生产力建模提供支撑。