Li Huang, Baobin Han, Peng Cheng*, Zhilin Tian, Wenda Yang, Ji Ling, Wenbin Ma, Yihang Yu, Yucheng Gong, Yujie Tian and Hui Deng,
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引用次数: 0
摘要
土壤被认为是大气活性气体的重要来源，尤其是在农业土壤中。然而，从区域到全球范围内估算农业土壤中活性氮气（Nr）排放量的研究却很少。在本研究中，我们利用动态室系统，在考虑土壤湿度和温度的情况下，研究了广东省七种代表性农田土壤的亚硝酸（HONO）和一氧化氮（NO）排放量。因此，我们得出了每种土壤的 HONO 和 NO 排放量与水分和温度相关的经验公式。利用这些经验公式、具体的土地数据和肥料数据，我们估算出广东省农田土壤每年的 HONO 和 NO 排放通量分别为 97.41 和 37.08 Gg N yr-1。其总量相当于广东省 2017 年氮氧化物排放清单的 12%，可能对大气氧化能力和区域空气质量产生重大影响。
Nitrous Acid and Nitric Oxide Emissions from Agricultural Soils in Guangdong Province: Laboratory Measurement and Emission Estimation
Soil is recognized as an important source of atmospherically reactive gases, especially in agricultural soils. Nonetheless, there is scarcity of research estimating reactive nitrogen gas (Nr) emissions from agricultural soils at the regional to global scale. In this study, we examined nitrous acid (HONO) and nitric oxide (NO) emissions from seven representative agricultural soils in Guangdong Province, considering soil moisture and temperature, using a dynamic chamber system. Accordingly, empirical formulas for HONO and NO emissions for each soil in relation to moisture and temperature were developed. Utilizing these empirical formulas, specific land data, and fertilizer data, we estimated the annual HONO and NO emission fluxes from agricultural soils in Guangdong Province to be 97.41 and 37.08 Gg N yr–1, respectively. Their total quantity is equivalent to 12% of the 2017 NOx emission inventory for Guangdong Province, potentially exerting significant impacts on the atmospheric oxidizing capacity and regional air quality.
期刊介绍：
The scope of ACS Earth and Space Chemistry includes the application of analytical, experimental and theoretical chemistry to investigate research questions relevant to the Earth and Space. The journal encompasses the highly interdisciplinary nature of research in this area, while emphasizing chemistry and chemical research tools as the unifying theme. The journal publishes broadly in the domains of high- and low-temperature geochemistry, atmospheric chemistry, marine chemistry, planetary chemistry, astrochemistry, and analytical geochemistry. ACS Earth and Space Chemistry publishes Articles, Letters, Reviews, and Features to provide flexible formats to readily communicate all aspects of research in these fields.
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