Scaling Up Trace Gas Flux Estimates From Sites to Regions Incorporating Measures of Variance

结合方差测量将痕量气体通量估算从站点扩大到区域

• 批准号: 9420612
• 负责人: William Reiners
• 金额: $ 50万
• 依托单位: University of Wyoming
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-10-01 至 1999-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9420612&HistoricalAwards=false
• 关键词: Scaling; Up; Trace; Gas; Flux

9420612 REINERS Nitrous oxide (N2O) is an important greenhouse gas that is increasing in concentration by about 0.3% per year. Humid tropical forests account for 25-40% of the annual global emissions of N2O, and the conversion of forests to pastures or agriculture initially increases the emission rate to very high levels. These high levels of gas emission are sustained in ecosystems where fertilizers are applied, but the rates of emission can drop precipitously in pastures and unfertilized fields. Accurately estimating the atmospheric input of nitrous oxide on a regional scale must account for such complexity and provide estimates of the variance which is occurring. This project develops and test two models which more accurately characterizes the regional flux of nitrous oxide to the atmosphere from humid tropical forests.

9420612 REINERS 一氧化二氮 (N2O) 是一种重要的温室气体，其浓度每年增加约 0.3%。 潮湿的热带森林占全球氧化亚氮年排放量的 25-40%，森林转变为牧场或农业最初会将排放率提高到非常高的水平。 在施用化肥的生态系统中，这些高水平的气体排放持续存在，但在牧场和未施肥的田地中，排放率可能急剧下降。 准确估计区域范围内一氧化二氮的大气输入量必须考虑到这种复杂性并提供对正在发生的方差的估计。 该项目开发并测试了两个模型，可以更准确地描述一氧化二氮从潮湿热带森林到大气的区域通量。