Fire Scar Impacts on Surface Heat and Moisture Fluxes in Australia's Tropical Savanna and Feedbacks to Local and Regional Climate

火痕对澳大利亚热带稀树草原表面热量和水分通量的影响以及对当地和区域气候的反馈

• 批准号: DP0344744
• 负责人: Em/Prof Nigel Tapper
• 金额: $ 14.59万
• 依托单位: Monash University
• 依托单位国家: 澳大利亚
• 项目类别: Discovery Projects
• 财政年份: 2003
• 资助国家: 澳大利亚
• 起止时间: 2003-01-01 至 2006-06-30
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/DP0344744
• 关键词: Fire; Scar; Impacts; Surface; Heat

Fire burns as much as 250,000 km2 of northern Australia every year, mostly tropical savanna land. The atmospheric impacts of burning extend beyond the direct emissions of aerosol and trace gases to include the effects of land surface alteration on atmospheric circulation. Using observation and modelling, this study examines the modification of surface heat and moisture fluxes to the atmosphere caused by fire scars, along with the impact of such changes on atmospheric motion and precipitation at a range of scales. This unique work is of fundamental scientific interest and significance for current and future management of this important national resource.

大火每年烧毁澳大利亚北部25万平方公里的土地，其中大部分是热带稀树草原。燃烧对大气的影响不仅包括气溶胶和微量气体的直接排放，还包括陆地表面变化对大气循环的影响。通过观测和模拟，研究了火疤对地表热湿通量的影响，以及这种变化对大气运动和降水在一定尺度范围内的影响。这项独特的工作对当前和未来管理这一重要的国家资源具有根本的科学意义和意义。