Towards Filling a Major Gap in the Greenhouse Gas Balance From the Arctic: Defining the Importance of N2O Emission in the North Slope of Alaska

填补北极温室气体平衡的重大缺口：确定阿拉斯加北坡 N2O 排放的重要性

• 批准号: 2149988
• 负责人: Donatella Zona
• 金额: $ 29.93万
• 依托单位: San Diego State University Foundation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-08-01 至 2025-07-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2149988&HistoricalAwards=false
• 关键词: Towards; Filling; Major; Gap; Greenhouse

The emissions of nitrous oxide (N2O), a potent greenhouse gas (GHG), from arctic soils to the atmosphere is unknown, but long thought to be negligible. New data suggests otherwise, especially in areas subjected to disturbance where vegetation cover has been lost. To better constrain these numbers and appraise the large-scale importance of this GHG, the researchers will make measurements across the coastal plain of Alaska. This project will continue the advancing of a well-established outreach activities that involve local communities and students in the North Slope of Alaska.Given that northern wetland ecosystems are N limited, the research community has assumed the soil emissions of N2O, a powerful greenhouse gas (GHG), is negligible. However, this assumption ignores the large N pool associated with dead organic matter that can be released upon disturbance. The investigator’s preliminary data from Alaska suggest substantial N2O fluxes can occur, especially in terrain where ground slumping has occurred, resulting in unvegetated areas. The investigators will measure N2O fluxes using chambers across the North Slope of Alaska in vegetated and unvegetated areas to quantify the large-scale importance of this GHG. The investigators expect the results to be a step toward constraining the GHG budget. This project will continue the development of a well-established outreach component involving local communities and students in the North Slope of Alaska.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

一氧化二氮（N2O）是一种强效温室气体（GHG），从北极土壤向大气中的排放量尚不清楚，但长期以来人们认为可以忽略不计。新数据表明事实并非如此，特别是在植被丧失的受干扰地区。为了更好地限制这些数字并评估这种温室气体的大规模重要性，研究人员将在阿拉斯加沿海平原进行测量，该项目将继续推进一项由当地社区和学生参与的完善的外展活动。北坡鉴于北部湿地生态系统的氮含量有限，研究界假设 N2O（一种强效温室气体 (GHG)）的土壤排放量可以忽略不计。然而，这种假设忽略了与死亡有机物相关的大量氮库。研究人员从阿拉斯加获得的初步数据表明，可能会出现大量的 N2O 通量，尤其是在发生地面塌陷的地区，从而导致了无植被的区域。阿拉斯加北坡的植被和无植被区域，以量化这种温室气体的大规模重要性。调查人员预计，该结果将成为限制温室气体预算的一步，该项目将继续开发涉及当地的完善的外展部分。阿拉斯加北坡的社区和学生。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。