A Global Thermal Alert System Using MODIS: Initial Results from 2000-2001
A Global Thermal Alert System Using MODIS: Initial Results from 2000-2001
复制标题
DOI：
--
复制
发表时间：
2002
期刊：
影响因子：
--
通讯作者：
L. Flynn;R. Wright;H. Garbeil;A. Harris;E. Pilger
中科院分区：
文献类型：
--
作者：
L. Flynn;R. Wright;H. Garbeil;A. Harris;E. Pilger
The Moderate Resolution Imaging Spectrometer (MODIS) on NASA’s Terra platform offers near global coverage every 24 hours and thus is well-suited for monitoring global eruptions and fires. Repeat observations over active eruptions and gas flares associated with oil wells have shown that the MODIS instrument may indeed have achieved the 0.2 km geolocation accuracy promised. The MODIS Thermal Alert web site was created as a real-time tool to monitor volcanic eruptions and biomass burning events. A review of some of the thermal anomalies associated with volcanic activity that have been discovered is presented here. Large-scale effusive eruptions including those at Nyamuragira, Africa and Kilauea, Hawaii provide examples of the utility of monitoring hazards on a daily basis. Additional activity detected at Howard Island and Erta ‘Ale may have otherwise gone unreported because of their inaccessibility. Monthly MODIS alert composites can be used to summarize global volcanic activity and also to study temporal and spatial patterns of biomass burning on a global scale. Images available by file transfer protocol in real-time including ASTER and MODIS from EOSDIS and ATSR from ESRIN provide ways for immediate validation, cloud-cover assessment, and hazard characterization of the MODIS Thermal Alert hot spots. Optimally, the MODIS Thermal Alert will cover the globe 4 times per day when daytime alert tests for Terra and Aqua and a nighttime alert test for Aqua are added in the June – December 2002 time frame.
