干旱区研究

干旱区研究 >

2025 , Vol. 42 >Issue 5: 820 - 828

DOI: https://doi.org/10.13866/j.azr.2025.05.05

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中国北部沙漠及周边地区土壤NOx排放通量的估算

  • 周飞 ,
  • 王长燕 ,
  • 王芳 ,
  • 吴巧丽 ,
  • 苏小莉 ,
  • 张代洲 ,
  • 吴枫
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  • 1.宝鸡文理学院地理与环境学院， 陕西 宝鸡 721013
    2.中国科学院地球环境研究所， 黄土科学全国重点实验室， 陕西 西安 710061
    3.内蒙古自治区环境监测总站， 内蒙古 呼和浩特 010010
    4.西安地球环境创新研究院， 陕西 西安 710061
    5.熊本县立大学环境共生学部， 日本 熊本 862-8502
周飞（1998-），女，硕士研究生，主要从事多源遥感在地气物质交换中的应用. E-mail: zhoufei655129@163.com
吴枫. E-mail: kurt_wf@ieecas.cn

收稿日期: 2024-12-27

  修回日期: 2025-04-02

  网络出版日期: 2025-10-22

基金资助

国家自然科学基金项目(41971150);国家自然科学基金项目(42030511);中国科学院战略性先导科技专项(XDB40030200)

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Estimation of soil NOX emissions in the deserts and surrounding areas of Northern China

  • ZHOU Fei ,
  • WANG Changyan ,
  • WANG Fang ,
  • WU Qiaoli ,
  • SU Xiaoli ,
  • ZHANG Daizhou ,
  • WU Feng
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  • 1. School of Geography and Environment, Baoji University of Arts and Sciences, Baoji 721013, Shaanxi, China
    2. State Key Laboratory of Loess Science, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710061, Shaanxi, China
    3. Inner Mongolia Environmental Monitoring Central Station， Hohhot 010010, Inner Mongolia, China
    4. Xi’an Institute for Innovative Earth Environment Research, Xi’an 710061, Shaanxi, China
    5. Faculty of Environmental and Symbiotic Sciences, Prefectural University of Kumamoto, Kumamoto 862-8502, Japan

Received date: 2024-12-27

  Revised date: 2025-04-02

  Online published: 2025-10-22

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摘要

沙漠地表的氮氧化物（NOX）排放过程，对沙漠地区的大气活性氮循环具有重要作用。然而，目前对于沙漠地区NOX排放的定量评估仍然十分有限，制约了对其产生的环境影响的深入理解。本研究基于物质守恒定律，利用Sentinel-5P卫星搭载的TROPOMI传感器获取的NO2垂直柱浓度（NO2VCD），综合考虑区域内NOX的大气水平输送、扩散、化学转化、沉降及人为排放等因素，估算了2021年夏季中国北部沙漠及其周边地区的土壤NOX排放通量。研究结果显示：（1） 该地区土壤NOX平均排放通量为17.6 ng·m-2·s-1，其变化范围处于 0~85 ng·m-2·s-1之间，低值集中在沙漠腹地，而外围戈壁等区域排放通量相对较高。（2） 在不同沙漠区域中，巴丹吉林沙漠及周边区域平均排放通量为13.1 ng·m-2·s-1，显著低于腾格里沙漠及周边区域的26.0 ng·m-2·s-1（P<0.0001）。本研究较合理地估算了沙漠及其周边地区的土壤NOX排放通量，为深入理解沙漠生态系统对大气化学的贡献提供了科学依据，并为相关领域的后续研究奠定了基础。

关键词： 沙漠大气; 臭氧; “自上而下”法; 地气交换

本文引用格式

周飞 , 王长燕 , 王芳 , 吴巧丽 , 苏小莉 , 张代洲 , 吴枫 . 中国北部沙漠及周边地区土壤NOx排放通量的估算[J]. 干旱区研究, 2025 , 42(5) : 820 -828 . DOI: 10.13866/j.azr.2025.05.05

Abstract

Previous studies have demonstrated that notable amounts of nitrogen oxides (NOX) are emitted from desert surfaces, and these emissions likely play a crucial role in the atmospheric reactive nitrogen cycle within the desert regions. However, quantitative assessments of NOX emissions in these regions are scarce, which limits our understanding of the environmental consequences thereof. This study aimed to quantify the soil NOX emission fluxes in the deserts and surrounding areas of Northern China to provide a basis for understanding the ecological benefits of desert NOX emissions. Based on the law of conservation of mass, we utilized NO2 vertical column density (NO2VCD) data from the Tropospheric Monitoring Instrument (TROPOMI) onboard the Sentinel-5P satellite for the deserts and surrounding areas of Northern China. The study quantified the soil NOX emission fluxes by subtracting the effects of atmospheric horizontal transport, diffusion, chemical transformation, deposition, and anthropogenic emissions of regional NOX. The results revealed the following: (1) The mean soil NOX emission flux in the deserts and surrounding areas of Northern China is 17.6 ng·m-2·s-1, ranging from 0 to 85 ng·m-2·s-1. Lower emission fluxes were predominantly observed in the central regions of the desert, whereas the Gobi surrounding the desert exhibited higher emission fluxes. (2) Among the different desert areas studied, the Badain Jaran Desert and surrounding areas have a mean emission flux of 13.1 ng·m-2·s-1, which is significantly lower than the 26.0 ng·m-2·s-1 emission flux observed in the Tengger Desert and surrounding areas (P<0.0001). This study provides a robust estimation of the soil NOX emission fluxes in the deserts and surrounding areas of Northern China, thereby enhancing our understanding of how desert ecosystems contribute to atmospheric chemistry and laying a solid foundation for future research in desert atmospheric chemistry.

Key words： desert air; ozone; top-down approach; surface-atmosphere exchange

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