Land‐Air Exchanges of Various Gaseous Nitrogen Species in an Urban Wetland Based on In Situ Flux Observations

Abstract Wetlands are universally recognized as hotspots for nitrogen cycling and gaseous nitrogen emissions. In this study, the fluxes of nitric oxide (NO), nitrogen dioxide (NO 2 ), ammonia (NH 3 ), and nitrous oxide (N 2 O) were observed seasonally in the mud and waterfront plots of an urban wetland in eastern China using a dynamic flux chamber. The results revealed that the fluxes of NO, NO 2 , and NH 3 displayed a diurnal pattern of higher values during the day and lower values at night, which was opposite to that of N 2 O. The average annual emissions of NO, NH 3 , and N 2 O were 0.16 ± 0.04, 0.59 ± 0.03, and 8.81 ± 0.44 kg N ha −1 yr −1 , respectively. Conversely, NO 2 exhibited deposition, with an annual flux of 1.51 ± 0.03 kg N ha −1 yr −1 . Given the evolving area of urban wetlands, the emissions of gaseous nitrogen, particularly N 2 O, deserve substantial attention.

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Publication Details

Journal
Geophysical Research Letters
Published
2025-03-05
DOI
https://doi.org/10.1029/2024gl113265
Primary Topic
Peatlands and Wetlands Ecology
Type
article
Field-Weighted Citation Impact
0.00

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article

Land‐Air Exchanges of Various Gaseous Nitrogen Species in an Urban Wetland Based on In Situ Flux Observations

Lei Duan, Ronghua Kang, Piaopiao Ke, Zimeng Zhang et al.
Geophysical Research Letters
Peatlands and Wetlands Ecology
article

Land‐Air Exchanges of Various Gaseous Nitrogen Species in an Urban Wetland Based on In Situ Flux Observations

Lei Duan, Ronghua Kang, Piaopiao Ke, Zimeng Zhang, Yu Zhao, Wenjia Wang, Qian Yu, Lei Zhang, Jiale Chang, Han Li
article en

Abstract

Abstract Wetlands are universally recognized as hotspots for nitrogen cycling and gaseous nitrogen emissions. In this study, the fluxes of nitric oxide (NO), nitrogen dioxide (NO 2 ), ammonia (NH 3 ), and nitrous oxide (N 2 O) were observed seasonally in the mud and waterfront plots of an urban wetland in eastern China using a dynamic flux chamber. The results revealed that the fluxes of NO, NO 2 , and NH 3 displayed a diurnal pattern of higher values during the day and lower values at night, which was opposite to that of N 2 O. The average annual emissions of NO, NH 3 , and N 2 O were 0.16 ± 0.04, 0.59 ± 0.03, and 8.81 ± 0.44 kg N ha −1 yr −1 , respectively. Conversely, NO 2 exhibited deposition, with an annual flux of 1.51 ± 0.03 kg N ha −1 yr −1 . Given the evolving area of urban wetlands, the emissions of gaseous nitrogen, particularly N 2 O, deserve substantial attention.

Geophysical Research LettersVol. 52(5)
University of Helsinki (FI), Chinese Academy of Sciences (CN), State Key Laboratory of Pollution Control and Resource Reuse (CN), Institute of Applied Ecology (CN), State Key Joint Laboratory of Environment Simulation and Pollution Control (CN), Nanjing University (CN), Tsinghua University (CN)
Natural Science Foundation of Jiangsu Province, State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex, National Key Research and Development Program of China
Openalex Percentile: Top 96%
Peatlands and Wetlands Ecology
DOIOpen Access PDFOpenAlex
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